MEDTRONIC INC
S-4, 1998-08-26
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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     As Filed with the Securities and Exchange Commission on August 26, 1998
                                                 Registration No: 333-__________


                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-4
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933

                                 MEDTRONIC, INC.
             (Exact name of registrant as specified in its charter)

       Minnesota                     3845                       41-0793183
(State or other jurisdiction   (Primary Standard              (I.R.S. Employer
of incorporation or            Industrial Classification  Identification Number)
organization)                  Code Number)

                            7000 Central Avenue N.E.
                          Minneapolis, Minnesota 55432
                                 (612) 514-4000

    (Address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)
                             ----------------------

                               Carol E. Malkinson
                  Senior Legal Counsel and Assistant Secretary
                                 Medtronic, Inc.
                            7000 Central Avenue N.E.
                          Minneapolis, Minnesota 55432
                                 (612) 514-4000

            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                   Copies to:
  David C. Grorud, Esq.                      Bruce A. Machmeier, Esq.
  Mary E. Strand, Esq.                       Timothy J. Scallen, Esq.
  Fredrikson & Byron, P.A.                   Oppenheimer Wolff & Donnelly LLP
  900 Second Avenue South, Suite 1100        45 South Seventh Street, Suite 3400
  Minneapolis, Minnesota 55402-3397          Minneapolis, Minnesota 55402-1609
  (612) 347-7000                             (612) 607-7000
                             ----------------------

Approximate  date of  commencement  of proposed  sale of the  securities  to the
public:  Upon  consummation  of the Merger,  as described  in this  Registration
Statement.

If the securities  being registered on this Form are being offered in connection
with the  formation of a holding  company and there is  compliance  with General
Instruction G, check the following box. [ ]

If this Form is filed to register additional securities for an offering pursuant
to Rule 462(b) under the Securities Act, please check the following box and list
the  Securities  Act  registration  statement  number of the  earlier  effective
registration statement for the same offering. [ ]

If this Form is a  post-effective  amendment filed pursuant to Rule 462(d) under
the  Securities  Act,  check  the  following  box and  list the  Securities  Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]


<PAGE>




                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
- ---------------------------- ------------------- ----------------------- ------------------------ -------------------
Title of each class                              Proposed maximum        Proposed maximum         Amount of
of securities                Amount to be        offering price          aggregate offering       registration
to be registered             registered(1)       per share               price                    fee(2)
- ---------------------------  ------------------- ----------------------- ------------------------ -------------------
<S>                          <C>                 <C>                     <C>                      <C>
Common Stock, par           
value $.10 per share(3)       1,557,020 shares   Not Applicable          Not Applicable           $24,268.36
- ---------------------------- ------------------- ----------------------- ------------------------ -------------------
</TABLE>

(1)      Represents  the  approximate  maximum  number of shares  issuable  upon
         consummation of the Merger as described in the Registration  Statement,
         based upon the  anticipated  maximum  number of  outstanding  shares of
         AVECOR  Cardiovascular  Inc.  Common  Stock  immediately  prior  to the
         Merger's  Effective  Time  that  are  not  owned  by  Medtronic,   Inc.
         (8,100,000)  and assuming the Average Stock Price for  Medtronic,  Inc.
         Common  Stock is equal to $57.875 (the  reported  closing sale price of
         Medtronic, Inc. Common Stock as reported by the New York Stock Exchange
         on August  21,  1998),  thereby  resulting  in the  maximum  Conversion
         Fraction of 0.1922 of a  Medtronic,  Inc.  share issued for each AVECOR
         Cardiovascular Inc. share.

(2)      The  registration  fee was  calculated  pursuant  to  Section  6 of the
         Securities Act of 1933 (the  "Securities  Act") and Rules 457(f)(1) and
         457(c)  thereunder,  as  0.000295  multiplied  by  the  product  of (A)
         8,100,000, the anticipated maximum number of AVECOR Cardiovascular Inc.
         shares that may be exchanged pursuant to the Merger,  multiplied by (B)
         $10.15625,  the  average  of the  high and low sale  prices  of  AVECOR
         Cardiovascular  Inc.  Common  Stock as reported by the Nasdaq  National
         Market on August 21,  1998,  which date was within five  business  days
         prior to the date of this filing.

(3)      Each share of Medtronic,  Inc.  Common Stock includes a Preferred Stock
         Purchase Right pursuant to Medtronic, Inc.'s Shareholder Rights Plan.

         The registrant hereby amends this  Registration  Statement on such date
or dates as may be necessary to delay its  effective  date until the  registrant
shall file a further amendment which specifically  states that this Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities Act or until the Registration Statement shall become effective on
such  date  as the  Commission,  acting  pursuant  to  said  Section  8(a),  may
determine.


<PAGE>


                               [AVECOR letterhead]

                                                           _____________, 1998
Dear AVECOR Shareholder:

         I  am  pleased  to  invite  you  to  attend  the  Special   Meeting  of
Shareholders of AVECOR  Cardiovascular  Inc.  ("AVECOR"),  which will be held on
___________, 1998, at 9:00 a.m., local time, at AVECOR's corporate headquarters,
located at 7611 Northland Drive, Minneapolis, Minnesota. At the meeting you will
be asked to consider and vote upon a Plan of Merger and an Agreement and Plan of
Merger dated as of July 12, 1998 (the "Merger  Agreement")  that provide for the
merger of a  wholly-owned  subsidiary  of  Medtronic,  Inc.  ("Medtronic")  into
AVECOR.

         Under the terms of the Plan of Merger and the Merger Agreement,  AVECOR
shareholders  will  receive  $11.125  in shares  of  Medtronic  Common  Stock in
exchange for each of their shares of AVECOR Common  Stock.  The actual number of
Medtronic  shares you will receive in the merger for your AVECOR  shares will be
based on the market value of Medtronic  Common Stock for a specified time period
before the meeting.

         The attached Proxy Statement/Prospectus is intended to provide you with
the  information you will need to make an informed  decision  regarding how your
should  vote  on the  proposed  merger.  It  also  serves  as a  Prospectus  for
Medtronic, describing the investment in Medtronic that you will be making if the
merger is approved  and you  exchange  your AVECOR  Common  Stock for  Medtronic
Common Stock. Copies of the Plan of Merger and the Merger Agreement are attached
to the Proxy Statement/Prospectus as Appendices A and B. I urge you to read this
information carefully before voting on the proposed merger.

         The Board of Directors believes the proposed transaction is fair and in
the best interests of AVECOR and its  shareholders  and  unanimously  recommends
approval of the Plan of Merger and the Merger Agreement. The Board believes that
the merger will,  among other  things,  permit AVECOR  shareholders  to continue
their equity  participation  on a tax-free basis in a larger,  more  diversified
medical products enterprise.

         The Board of Directors of AVECOR  retained the investment  banking firm
of Piper  Jaffray  Inc.  to advise it with  respect to the  consideration  to be
received in the  merger.  Piper  Jaffray  has  advised  the Board  that,  in its
opinion, the consideration to be received by AVECOR shareholders pursuant to the
Merger  Agreement  and the Plan of  Merger is fair to such  shareholders  from a
financial  point  of  view.  A copy of the  opinion  is  attached  to the  Proxy
Statement/Prospectus as Appendix D.

         The Plan of Merger and the Merger  Agreement  must be  approved  by the
holders of a majority of the  outstanding  shares of AVECOR Common  Stock.  Your
vote on this  matter is very  important.  We urge you to  carefully  review  the
enclosed material and to return your proxy promptly.

         Whether or not you plan to attend the meeting, please sign and promptly
return your proxy card in the enclosed postage-paid  envelope. If you attend the
meeting,  you may vote in person if you wish,  even  though you have  previously
returned your proxy.


Sincerely,



Anthony Badolato

Chairman and Chief Executive Officer


<PAGE>


                           AVECOR CARDIOVASCULAR INC.
                              7611 Northland Drive
                          Minneapolis, Minnesota 55428

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                        TO BE HELD ________________, 1998


To the Shareholders of AVECOR Cardiovascular Inc.:

         A Special  Meeting of the  Shareholders of AVECOR  Cardiovascular  Inc.
("AVECOR")  will be held at  AVECOR's  corporate  headquarters,  located at 7611
Northland Drive,  Minneapolis,  Minnesota,  on ___________,  1998, at 9:00 a.m.,
local time,  to consider and act upon a proposal to approve a Plan of Merger and
an Agreement  and Plan of Merger (the "Merger  Agreement"),  copies of which are
included as  Appendices A and B to the Proxy  Statement/Prospectus  accompanying
this  Notice.  Pursuant to the Plan of Merger and the Merger  Agreement,  (a) AC
Merger Corp. ("Merger Subsidiary") will be merged into AVECOR, with AVECOR to be
the surviving corporation and to become a wholly-owned  subsidiary of Medtronic,
Inc.  ("Medtronic"),  and (b) holders of AVECOR common stock, par value $.01 per
share ("AVECOR  Common Stock"),  will receive shares of Medtronic  common stock,
par value $.10 per share  ("Medtronic  Common  Stock"),  based upon a conversion
fraction described in the Proxy Statement/Prospectus accompanying this Notice.

         With  respect to the  proposal  to  approve  the Plan of Merger and the
Merger Agreement, AVECOR shareholders have a right to dissent and obtain payment
in cash for their shares by complying  with the terms and procedures of Sections
302A.471 and 302A.473 of the Minnesota Business Corporation Act, copies of which
are included as Appendix C to the Proxy  Statement/Prospectus  accompanying this
Notice.

         Only  shareholders  of  record  as shown on the  books of AVECOR at the
close of business on ___________,  1998 are entitled to notice of and to vote at
the Special Meeting or any adjournments thereof.

         Information relating to the above proposal is set forth in the attached
Proxy  Statement/Prospectus.  Approval  of the  Plan of  Merger  and the  Merger
Agreement will require the affirmative  vote of the holders of a majority of the
shares of AVECOR Common Stock  outstanding on the record date. All  shareholders
are cordially invited to attend the Special Meeting in person.

                                          BY ORDER OF THE BOARD OF DIRECTORS


____________, 1998                        
                                          Richard G. Lareau
                                          Secretary

          WHETHER OR NOT YOU PLAN TO ATTEND THE SPECIAL MEETING, PLEASE
          COMPLETE, SIGN, AND DATE THE ENCLOSED PROXY CARD AND MAIL IT
         PROMPTLY IN THE ENCLOSED PROXY RETURN ENVELOPE, WHICH REQUIRES
                    NO POSTAGE IF MAILED IN THE UNITED STATES

             DO NOT SEND ANY STOCK CERTIFICATES WITH THE PROXY CARD


<PAGE>


                           PROXY STATEMENT/PROSPECTUS

AVECOR Cardiovascular Inc.                                       Medtronic, Inc.
7611 Northland Drive                                    7000 Central Avenue N.E.
Minneapolis, Minnesota  55428                      Minneapolis, Minnesota  55432
Telephone:  (612) 391-9000                            Telephone:  (612) 514-4000


          SPECIAL MEETING OF SHAREHOLDERS OF AVECOR CARDIOVASCULAR INC.
                         TO BE HELD ON ___________, 1998

         This Proxy  Statement/Prospectus is being furnished to the shareholders
of AVECOR  Cardiovascular Inc. ("AVECOR") in connection with the special meeting
of  shareholders  (the  "Meeting")  of AVECOR to be held at  AVECOR's  corporate
headquarters,  located  at 7611  Northland  Drive,  Minneapolis,  Minnesota,  on
___________,  1998,  at 9:00 a.m. At the Meeting,  AVECOR  shareholders  will be
asked to consider and act upon a proposal to approve the Plan of Merger attached
hereto as Appendix A and the  Agreement  and Plan of Merger  attached  hereto as
Appendix  B (the  "Merger  Agreement"),  pursuant  to which (a) AC Merger  Corp.
("Merger   Subsidiary"),   a   wholly-owned   subsidiary  of   Medtronic,   Inc.
("Medtronic"),  will be merged (the  "Merger")  into  AVECOR,  which will be the
surviving  corporation  in the Merger and become a  wholly-owned  subsidiary  of
Medtronic,  and (b) each share of AVECOR common stock,  par value $.01 per share
("AVECOR  Common  Stock"),  will be  converted  into a  portion  of a  share  of
Medtronic common stock, par value $.10 per share ("Medtronic Common Stock"),  as
described in this Proxy Statement/Prospectus.

         This Proxy  Statement/Prospectus  also  constitutes  the  Prospectus of
Medtronic  with respect to the shares of Medtronic  Common Stock to be issued in
the Merger.  Medtronic has filed a  Registration  Statement on Form S-4 with the
Securities and Exchange  Commission  (the  "Commission")  covering the shares of
Medtronic  Common Stock that may be issued in connection with the Merger,  based
on the Conversion  Fraction  described in this Proxy  Statement/Prospectus.  The
Medtronic  Common Stock is listed on the New York Stock Exchange  ("NYSE") under
the symbol  "MDT."  This Proxy  Statement/Prospectus  is first  being  mailed to
AVECOR shareholders on or about ___________, 1998.

         NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION  HAS  APPROVED OR  DISAPPROVED  THESE  SECURITIES  OR PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROXY  STATEMENT/PROSPECTUS.  ANY REPRESENTATION TO
THE CONTRARY IS A CRIMINAL OFFENSE.

         Information  contained  or  incorporated  by  reference  in this  Proxy
Statement/Prospectus   regarding  Medtronic  has  been  supplied  by  Medtronic.
Information   contained   or   incorporated   by   reference   in   this   Proxy
Statement/Prospectus regarding AVECOR has been supplied by AVECOR.

         Additional copies of this Proxy Statement/Prospectus and the Proxy card
to be  returned  for the Meeting can be obtained  from  AVECOR,  7611  Northland
Drive, Minneapolis,  Minnesota 55428, Attention:  Investor Relations,  telephone
(612) 391-9000.


        The date of this Proxy Statement/Prospectus is ___________, 1998.


<PAGE>


         No person has been  authorized to give any  information  or to make any
representations other than those contained in this Proxy Statement/Prospectus or
the  documents   incorporated  by  reference  herein,  and  any  information  or
representations not contained herein or therein may not be relied upon as having
been authorized. This Proxy Statement/Prospectus does not constitute an offer to
sell or a solicitation of an offer to buy the Medtronic  Common Stock offered by
this  Proxy  Statement/Prospectus,  or  the  solicitation  of a  proxy,  in  any
circumstances  in which such offer or solicitation is unlawful.  The delivery of
this Proxy  Statement/Prospectus  does not imply that the information  herein is
correct as of any time subsequent to the date of such information.


                              AVAILABLE INFORMATION

         This Proxy  Statement/Prospectus is a prospectus of Medtronic delivered
in compliance with the Securities Act of 1933 (the "Securities Act"). This Proxy
Statement/Prospectus  constitutes  part of a Registration  Statement on Form S-4
(the "Registration  Statement") filed by Medtronic with the Commission under the
Securities  Act with  respect  to the  Medtronic  Common  Stock to be  issued in
connection with the Merger. This Proxy Statement/Prospectus does not contain all
of the information set forth in the Registration  Statement and the exhibits and
schedules thereto.  For further  information with respect to Medtronic,  AVECOR,
and  the  Medtronic  Common  Stock  offered  hereby,  reference  is  made to the
Registration  Statement,  exhibits, and schedules.  Statements contained in this
Proxy  Statement/Prospectus  as to the  contents  of any  contract  or any other
document  referred  to  are  not  necessarily  complete,  and in  each  instance
reference is made to the copy of such  contract or document  filed as an exhibit
to the Registration Statement or such other document,  each such statement being
qualified in all respects by such reference.

         Medtronic and AVECOR are subject to the  informational  requirements of
the  Securities  Exchange Act of 1934 (the "Exchange  Act"),  and, in accordance
therewith,  each files  reports,  proxy and  information  statements,  and other
information  with the Commission.  The public may read and copy the Registration
Statement  and  the  reports,  proxy  and  information  statements,   and  other
information  filed by each of Medtronic and AVECOR  pursuant to the Exchange Act
at the Commission's Public Reference Room at 450 Fifth Street, N.W., Washington,
D.C. 20549, or at one of the  Commission's  regional  offices:  500 West Madison
Street, Suite 1400, Chicago,  Illinois 60661-2511 and 7 World Trade Center, 13th
Floor, New York, New York, 10048. Copies of all or any part of such material are
available for inspection at the offices of the New York Stock Exchange, Inc., 20
Broad Street, New York, New York 10005. Copies of all or any part of such AVECOR
material are available for inspection at the offices of the National Association
of Securities  Dealers,  Inc. The public may obtain information on the operation
of  the  Commission's  Public  Reference  Room  by  calling  the  Commission  at
1-800-SEC-0330.    The    Commission    maintains    an    Internet    site   at
"http://www.sec.gov"  containing reports, proxy and information statements,  and
other  information   regarding  issuers  that  file   electronically   with  the
Commission, including Medtronic and AVECOR.


                      INFORMATION INCORPORATED BY REFERENCE

         This  Proxy  Statement/Prospectus  incorporates  certain  documents  by
reference.  Medtronic  and AVECOR will  provide  without  charge to each person,
including any  beneficial  owner of AVECOR Common Stock,  to whom a copy of this
Proxy  Statement/Prospectus  is delivered, on written or oral request, copies of
any and all  such  documents  (other  than the  exhibits  thereto,  unless  such
exhibits are  specifically  incorporated by reference into the information  that
this Proxy  Statement/Prospectus  incorporates)  of Medtronic or AVECOR,  as the
case may be, that are incorporated by reference.  Requests should be directed to
Medtronic,  Inc.,  7000  Central  Avenue  N.E.,  Minneapolis,  Minnesota  55432,
Attention: Investor Relations Department, telephone (612) 514-3035, or to AVECOR
Cardiovascular  Inc.,  7611  Northland  Drive,  Minneapolis,   Minnesota  55428,
Attention:  Investor  Relations,  telephone (612)  391-9000.  In order to ensure
timely delivery of the documents,  any such request should be made no later than
[five business days prior to Meeting date], 1998.


<PAGE>

         The following Medtronic documents are incorporated by reference herein:

         1.       Medtronic's  Annual  Report on Form 10-K for the  fiscal  year
                  ended April 30, 1998.

         2.       Medtronic's  Current  Reports  on Form 8-K filed July 8, 1998,
                  July 16, 1998, and August 20, 1998.

         3.       The  description  of  Medtronic's  Common  Stock  contained in
                  Medtronic's  Registration  Statement  on Form 8-A filed  under
                  Section 12 of the Exchange Act.

         4.       The description of Medtronic's Preferred Stock Purchase Rights
                  attached  to  its  Common  Stock   contained  in   Medtronic's
                  Registration  Statement on Form 8-A filed under  Section 12 of
                  the Exchange Act.

         All  documents  filed by  Medtronic  with the  Commission  pursuant  to
Sections  13(a),  13(c),  14 and 15(d) of the Exchange Act after the date hereof
and  prior to the date of the  Meeting  shall be deemed  to be  incorporated  by
reference  herein  and  shall be a part  hereof  from the date of filing of such
documents.

         The following AVECOR documents are incorporated by reference herein:

         1.       AVECOR's  Annual  Report  on  Form  10-K  for the  year  ended
                  December 31, 1997.

         2.       AVECOR's Quarterly Reports on Form 10-Q for the quarters ended
                  March 31, 1998 and June 30, 1998.

         All documents filed by AVECOR with the Commission  pursuant to Sections
13(a) and 15(d) of the  Exchange Act after the date hereof and prior to the date
of the Meeting shall be deemed to be incorporated by reference  herein and shall
be a part hereof from the date of filing of such documents.

         Any statements contained in a document incorporated by reference herein
shall be deemed to be modified or superseded  for purposes  hereof to the extent
that a statement  contained herein (or in any other  subsequently filed document
that also is  incorporated  by reference  herein)  modifies or  supersedes  such
statement.  Any  statement  so  modified  or  superseded  shall not be deemed to
constitute a part hereof except as so modified or superseded.


           CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING INFORMATION

         Certain  statements   contained  in  this  Proxy   Statement/Prospectus
(including  information  included or incorporated by reference herein) and other
written and oral  statements  made from time to time by Medtronic  and AVECOR do
not relate strictly to historical or current facts. As such, they are considered
"forward-looking  statements" which provide current expectations or forecasts of
future events.  Such statements can be identified by the use of terminology such
as  "anticipate,"  "believe,"  "estimate,"  "expect,"  "intend," "may," "could,"
"possible,"   "plan,"   "project,"  "will,"  "forecast"  and  similar  words  or

<PAGE>

expressions.  Medtronic's  and AVECOR's  respective  forward-looking  statements
generally  relate to their  respective  growth  strategies,  financial  results,
product  development and regulatory  approval programs,  and sales efforts.  One
must carefully  consider  forward-looking  statements  and understand  that such
statements involve a variety of risks and uncertainties,  known and unknown, and
may be affected by  inaccurate  assumptions.  Consequently,  no  forward-looking
statement can be guaranteed  and actual results may vary  materially.  It is not
possible to foresee or identify all factors  affecting  Medtronic's  or AVECOR's
respective  forward-looking  statements,  and  investors  therefore  should  not
consider  any list of  factors  affecting  Medtronic's  or  AVECOR's  respective
forward-looking   statements  to  be  an  exhaustive  statement  of  all  risks,
uncertainties,  or potentially  inaccurate  assumptions.  Neither  Medtronic nor
AVECOR undertakes any obligation to update any forward-looking statement.

         Although  it is not  possible  to  create a  comprehensive  list of all
factors that may cause  actual  results to differ from  Medtronic's  or AVECOR's
forward-looking  statements,  such factors  include,  among  others,  (i) trends
toward  managed  care,  health  care  cost  containment,  and other  changes  in
government  and  private  sector  initiatives,  in the  United  States and other
countries in which Medtronic or AVECOR do business,  that are placing  increased
emphasis on the  delivery of more  cost-effective  medical  therapies;  (ii) the
trend of consolidation in the medical device industry as well as among customers
of medical device  manufacturers,  resulting in more significant,  complex,  and
long-term  contracts than in the past and potentially greater pricing pressures;
(iii) the difficulties and uncertainties  associated with the lengthy and costly
new product development and regulatory  approval processes,  which may result in
lost market opportunities or preclude product  commercialization;  (iv) efficacy
or safety  concerns with respect to marketed  products,  whether  scientifically
justified or not, that may lead to product  recalls,  withdrawals,  or declining
sales; (v) changes in governmental laws,  regulations,  and accounting standards
and the  enforcement  thereof that may be adverse to  Medtronic or AVECOR;  (vi)
increased  public  interest  in recent  years in  product  liability  claims for
implanted  medical devices,  including  pacemakers and leads;  (vii) other legal
factors  including  environmental  concerns  and  patent  or other  intellectual
property  disputes  with  competitors  or others;  (viii)  agency or  government
actions or  investigations  affecting  the  industry in general or  Medtronic or
AVECOR in particular;  (ix) the  development of new products or  technologies by
competitors,  technological  obsolescence,  and  other  changes  in  competitive
factors;  (x) risks  associated  with  maintaining  and expanding  international
operations;  (xi)  business  acquisitions,  dispositions,   discontinuations  or
restructurings  by  Medtronic or AVECOR;  (xii) the  integration  of  businesses
acquired  by  Medtronic  or  AVECOR;  and  (xiii)  economic  factors  over which
Medtronic  or AVECOR has no control,  including  changes in  inflation,  foreign
currency rates,  and interest rates.  Medtronic and AVECOR note these factors as
permitted by the Private Securities Litigation Reform Act of 1995.



<PAGE>


                                TABLE OF CONTENTS

                                                                            Page

  SUMMARY.....................................................................7

  GENERAL INFORMATION.........................................................20

  THE MERGER..................................................................21
         General..............................................................21
         Effective Time of the Merger.........................................22
         Background of the Merger.............................................22
         AVECOR's Reasons for the Merger; Recommendation of the 
             AVECOR Board of Directors........................................25
         Medtronic's Reasons for the Merger...................................27
         Opinion of AVECOR's Financial Advisor................................28
         Vote Required........................................................32
         Conversion of AVECOR Common Stock in the Merger......................32
         Shareholder Rights Plans.............................................34
         Treatment of Stock Options...........................................35
         Conduct of Business of AVECOR Pending the Merger.....................35
         Interests of Certain Persons in the Merger...........................36
         Voting Agreements....................................................37
         Stock Option Agreement...............................................37
         Conditions; Waiver...................................................38
         Amendment and Termination of the Merger Agreement....................38
         Expenses and Fees....................................................39
         Restrictions on Resale of Medtronic Common Stock.....................40
         Deregistration of AVECOR Common Stock................................40
         Accounting Treatment of the Merger...................................40
         Certain Federal Income Tax Consequences..............................41
         Indemnification......................................................42
         Regulatory Requirements..............................................43
         Rights of Dissenting AVECOR Shareholders.............................43

COMPARATIVE STOCK PRICES AND DIVIDENDS........................................46

RECENT DEVELOPMENTS...........................................................47

COMPARATIVE RIGHTS OF MEDTRONIC AND AVECOR SHAREHOLDERS.......................48
         Classification, Removal, and Nomination of Directors.................48
         Preferred Stock......................................................50
         Special Meetings of Shareholders.....................................50
         Voting Rights; Shareholder Approvals.................................50
         Cumulative Voting....................................................51
         Preemptive Rights....................................................51
         Amendment of the Articles of Incorporation...........................51
         Business Combinations and Control Share Acquisitions.................51
         Shareholder Rights Plans.............................................51
         Related Person Business Transactions.................................53
<PAGE>

INFORMATION REGARDING AVECOR..................................................54
         General Development of Business......................................54
         Industry Background and Markets......................................54
         Products.............................................................58
         Research and Development.............................................62
         Marketing............................................................63
         Competition..........................................................64
         Manufacturing........................................................65
         Governmental Regulation..............................................66
         Third-Party Reimbursement and Cost Containment.......................69
         Patents and Propriety Rights.........................................70
         Employees............................................................72

SELECTED FINANCIAL DATA OF AVECOR.............................................73

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
CONDITION AND RESULTS OF OPERATIONS OF AVECOR.................................74

CERTAIN TRANSACTIONS AND RELATIONSHIPS BETWEEN AVECOR AND
MEDTRONIC.....................................................................84

LEGAL MATTERS.................................................................84

EXPERTS.......................................................................84
 .
INDEX TO FINANCIAL STATEMENTS                                               F-1

APPENDIX A - Plan of Merger..............................................   A-1

APPENDIX B - Agreement and Plan of Merger................................   B-1

APPENDIX C - Sections 302A.471 and 302A.473 of Minnesota Business 
             Corporation Act............................................    C-1

APPENDIX D - Opinion of Piper Jaffray Inc...............................    D-1



<PAGE>


                                     SUMMARY

The following is a brief summary of certain  information  contained elsewhere in
this Proxy  Statement/Prospectus  and in the  documents  incorporated  herein by
reference.  Certain capitalized terms used in this Summary are defined elsewhere
in this Proxy  Statement/Prospectus.  Reference  is made to, and this Summary is
qualified in its entirety by, the more  detailed  information  contained in this
Proxy   Statement/Prospectus,   the   Appendices   hereto,   and  the  documents
incorporated in this Proxy Statement/Prospectus by reference.

                              Parties to the Merger

AVECOR:           AVECOR    Cardiovascular   Inc.   ("AVECOR"),    a   Minnesota
                  corporation,  was incorporated in 1990 and began operations in
                  1991 when it purchased  the  surgical  division of SCIMED Life
                  Systems,  Inc.  AVECOR  designs,  manufactures,  markets,  and
                  services  specialty  medical  devices  for  heart/lung  bypass
                  surgery  and  long-term   respiratory  support.  Its  products
                  include  the  Affinity(R)microporous,  hollow  fiber  membrane
                  oxygenator  and  related  blood  reservoirs,  a line of  solid
                  silicone  membrane  oxygenators and related blood  reservoirs,
                  the Affinity blood pump, the MYOtherm(R)cardioplegia  delivery
                  system,  Signature(TM)custom  tubing  packs,  and the Affinity
                  arterial filter.

                  AVECOR's  principal  offices and  corporate  headquarters  are
                  located at 7611 Northland Drive, Minneapolis, Minnesota 55428,
                  telephone:  (612) 391-9000.  See "Information  Incorporated by
                  Reference" and "Information Regarding AVECOR."

Medtronic:        Medtronic,  Inc. ("Medtronic"),  a Minnesota corporation,  was
                  incorporated in 1957. Medtronic is the world's leading medical
                  technology    company    specializing   in   implantable   and
                  interventional  therapies.  Its primary products include those
                  for bradycardia  pacing,  tachyarrhythmia  management,  atrial
                  fibrillation  management,  heart failure management,  coronary
                  and  peripheral  vascular  disease,  heart valve  replacement,
                  extracorporeal  cardiac  support,  minimally  invasive cardiac
                  surgery, malignant and non-malignant pain, movement disorders,
                  neurosurgery and neurodegenerative disorders. Medtronic serves
                  customers and patients in more than 120 countries.

                  Medtronic's  principal offices and corporate  headquarters are
                  located at 7000 Central  Avenue N.E.,  Minneapolis,  Minnesota
                  55432,    telephone:    (612)   514-4000.   See   "Information
                  Incorporated by Reference."

AC Merger Corp.:  AC   Merger   Corp.   ("Merger   Subsidiary"),   a   Minnesota
                  corporation,  is a corporation recently organized by Medtronic
                  for the purpose of  effecting  the Merger.  It has no material
                  assets  and  has  not  engaged  in any  activities  except  in
                  connection with the proposed Merger.
<PAGE>

                          AVECOR Shareholders' Meeting

Time, Date, and
Place of Meeting: A special  meeting of  shareholders  of AVECOR will be held on
                  ___________,  1998,  at 9:00 a.m.,  local  time,  at  AVECOR's
                  corporate  headquarters,  located  at  7611  Northland  Drive,
                  Minneapolis, Minnesota (the "Meeting").

Purpose of the
 Meeting:         The  purpose  of the  Meeting is to  consider  and vote upon a
                  proposal  to  approve  the Plan of Merger  attached  hereto as
                  Appendix A and the  Agreement  and Plan of Merger  dated as of
                  July 12,  1998  (the  "Merger  Agreement"),  among  Medtronic,
                  AVECOR,  and Merger  Subsidiary,  which is attached  hereto as
                  Appendix B,  providing for the merger (the "Merger") of Merger
                  Subsidiary  into  AVECOR,  as a result  of which  AVECOR  will
                  become a wholly-owned subsidiary of Medtronic. Other terms and
                  provisions  related  to the Merger are set forth in the Merger
                  Agreement,    which    is    summarized    in    this    Proxy
                  Statement/Prospectus.

Record            Date:  Only  holders of record of AVECOR  Common  Stock at the
                  close of business on  ___________,  1998,  will be entitled to
                  receive   notice  of  and  to  vote  at  the  Meeting  or  any
                  adjournment or adjournments thereof.

Vote Required:    The  affirmative  vote by the  holders  of a  majority  of the
                  outstanding  shares  of AVECOR  Common  Stock is  required  to
                  approve the Plan of Merger and the Merger Agreement. As of the
                  record date,  [8,044,475]  shares of AVECOR  Common Stock were
                  outstanding and entitled to vote. Of such shares,  [1,080,749]
                  shares  (approximately  [13.4]% of the shares entitled to vote
                  at the  Meeting)  are  beneficially  owned  by  directors  and
                  executive officers of AVECOR. AVECOR's directors and executive
                  officers  have  executed  voting  agreements  under which such
                  persons  agreed to vote shares of AVECOR Common Stock owned by
                  them in favor of the  Merger.  Of the shares of AVECOR  Common
                  Stock outstanding as of the record date, Medtronic,  through a
                  wholly-owned subsidiary,  owns 346,960 shares of AVECOR Common
                  Stock  representing  approximately 4.3% of the shares entitled
                  to vote.  Medtronic  intends to have all such shares  voted in
                  favor of the Merger.

                  AVECOR   shareholders   have  the  power  to  revoke   proxies
                  previously given by them before the shares  represented by any
                  such   proxies  are  voted  at  the   Meeting.   See  "General
                  Information."

                  Approval  of the Plan of Merger  and the Merger  Agreement  by
                  Medtronic  shareholders  is not required  under  Minnesota law
                  and,  accordingly,  will not be sought.  See "The Merger--Vote
                  Required."

Dissenters'
Rights:           Under  Minnesota law,  holders of AVECOR Common Stock who give
                  proper  notice to  AVECOR  and who do not vote in favor of the
                  Merger  have the right to receive in cash the "fair  value" of
                  their  AVECOR  shares in lieu of  Medtronic  Common Stock as a
                  result of the Merger.  See "The  Merger--Rights  of Dissenting
                  AVECOR Shareholders" and Sections 302A.471 and 302A.473 of the
                  Minnesota  Business  Corporation  Act (the "MBCA"),  copies of
                  which are attached  hereto as Appendix C. Holders of Medtronic
                  Common Stock do not have dissenters' rights in connection with
                  the Merger.
<PAGE>

                            Description of the Merger

General:          Upon  consummation  of the Merger,  Merger  Subsidiary will be
                  merged  into  AVECOR and  AVECOR  will  become a  wholly-owned
                  subsidiary  of  Medtronic.  Each share of AVECOR  Common Stock
                  outstanding  immediately prior to the Merger (except shares of
                  AVECOR  Common Stock owned by  Medtronic  and any shares as to
                  which dissenters' rights have been properly exercised) will be
                  converted  into  the  portion  of  a  share  (the  "Conversion
                  Fraction") of Medtronic  Common Stock equal to $11.125 divided
                  by the average of the daily  closing  sale prices of Medtronic
                  Common  Stock as  reported  on the NYSE  Composite  Tape  (the
                  "Average  Stock  Price") for the 18  consecutive  NYSE trading
                  days  ending  on  the  second  NYSE  trading  day  immediately
                  preceding  the  Effective  Time  of  the  Merger.  Solely  for
                  illustrative  purposes, the Conversion Fraction would be .1922
                  (or one  Medtronic  share for each 5.2 AVECOR  shares held) if
                  the Average Stock Price were calculated based upon the closing
                  sale price of Medtronic Common Stock on [August 24], 1998.

                  The Conversion  Fraction is subject to appropriate  adjustment
                  in the event of a stock split, combination, stock dividend, or
                  other  distribution of shares of Medtronic  Common Stock prior
                  to the Effective Time of the Merger. See "The Merger."

                  Each share of Medtronic  Common  Stock  received in the Merger
                  will also  represent one Preferred  Stock Purchase Right under
                  Medtronic's     Shareholder     Rights    Plan.    See    "The
                  Merger--Shareholder Rights Plan."

                  Persons  entitled to a fractional  share of  Medtronic  Common
                  Stock upon such conversion will receive a cash payment in lieu
                  thereof. See "The Merger--Conversion of AVECOR Common Stock in
                  the Merger--Fractional Shares."

                  If the Merger is approved and the Merger is completed,  AVECOR
                  shareholders  will be  instructed  to deliver  to  Medtronic's
                  exchange agent for the Merger a letter of  transmittal,  which
                  will  be  sent  to such  shareholders  following  the  Merger,
                  together  with  certificates   evidencing  each  shareholder's
                  AVECOR  Common  Stock,  in exchange for the  Medtronic  Common
                  Stock  and,  if  applicable,  cash in  lieu of any  fractional
                  shares of Medtronic Common Stock.  AVECOR  shareholders should
                  not send in their  certificates until they receive a letter of
                  transmittal.  See "The  Merger--Conversion  of  AVECOR  Common
                  Stock in the Merger."

Effective Time of
 the Merger:      It is  expected  that the  Merger  will  become  effective  as
                  promptly  as  practicable  following  approval  of the Plan of
                  Merger and the Merger  Agreement by the requisite  vote of the
                  AVECOR  shareholders  and the  satisfaction  or  waiver of the
                  other  conditions  to the Merger.  See "The  Merger--Effective
                  Time" and "--Conditions; Waiver."
<PAGE>

Background of the
 Merger:          The  terms  of  the  Merger   Agreement   are  the  result  of
                  arm's-length negotiations between representatives of Medtronic
                  and  AVECOR.  The  following  is a  brief  discussion  of  the
                  background  of these  negotiations,  the  Merger,  and related
                  transactions.

                  In November 1997,  AVECOR  engaged Piper Jaffray Inc.  ("Piper
                  Jaffray")  to  explore  various  strategic   alternatives  for
                  AVECOR.

                  During  the  period  from  December  1997 to early  July 1998,
                  AVECOR met at  various  times  with  Medtronic  and four other
                  companies  regarding a possible business  combination  between
                  AVECOR  and each of those  companies.  During  the  course  of
                  AVECOR's  negotiations  with  Medtronic,  which  began in June
                  1998, AVECOR continued to discuss a possible  transaction with
                  two of the other four interested companies.

                  During  June  1998,   Medtronic  held  meetings  with  AVECOR,
                  reviewed  due  diligence   information   concerning   AVECOR's
                  business,  and  ultimately  proposed the terms of its offer to
                  acquire  AVECOR.  On June 25,  1998,  the  Medtronic  Board of
                  Directors approved the acquisition of AVECOR, subject to final
                  negotiations by senior  management.  During the period of July
                  7-12, 1998, AVECOR,  Medtronic,  and their respective advisors
                  negotiated  the definitive  terms of the Merger  Agreement and
                  related agreements.

                  On July 12, 1998, the Board of Directors of AVECOR unanimously
                  approved  the terms of the  Merger  Agreement  and the Plan of
                  Merger.   The  Merger   Agreement  was  signed  following  the
                  conclusion of the meeting of the Board of Directors of AVECOR.
                  See  "The   Merger--Background  of  the  Merger,"  "--AVECOR's
                  Reasons for the Merger;  Recommendation of the AVECOR Board of
                  Directors,"   "--Medtronic's  Reasons  for  the  Merger,"  and
                  "--Opinion of AVECOR's Financial Advisor."

Reasons for the
 Merger:          In reaching its  conclusions  to approve the Merger  Agreement
                  and to  recommend  the  approval of the Plan of Merger and the
                  Merger Agreement by the AVECOR shareholders,  the AVECOR Board
                  of  Directors  considered  various  factors,   including:  (i)
                  AVECOR's  strategic   alternatives,   including   remaining  a
                  separate company,  exploring a future acquisition of AVECOR by
                  another  party,  or  engaging  in a merger  of equals or joint
                  venture  transaction with another party;  (ii) certain factors
                  influencing the heart/lung  bypass device industry,  including
                  pricing  pressures,  the need to  compete  by  offering a more
                  complete  line of  products,  and other  competitive  factors;
                  (iii) the overall  strategic fit between  AVECOR and Medtronic
                  in  view of  their  respective  product  lines,  markets,  and
                  distribution    channels   and   the   potential    synergies,
                  efficiencies,  and cost savings that could be realized through
                  a combination  of AVECOR and Medtronic;  (iv) the  opportunity
                  for AVECOR shareholders to continue equity  participation in a
                  larger,  more diversified  medical device company at a premium
                  over  market   prices  for  AVECOR   Common   Stock  prior  to
                  announcement of the Merger;  (v) the financial advice provided
                  to AVECOR by Piper  Jaffray and Piper  Jaffray's  opinion that
                  the consideration to be received by AVECOR shareholders in the
                  Merger is fair from a financial  point of view; (vi) the terms
                  and  conditions  of the Merger  Agreement;  and (vii) that the
                  Merger will be a tax-free  transaction  for federal income tax
                  purposes to AVECOR  shareholders  receiving  Medtronic  Common
                  Stock.


<PAGE>

                  The Board of Directors of AVECOR has unanimously  approved the
                  Merger,  and the Board  recommends  that the  shareholders  of
                  AVECOR  vote in  favor of the Plan of  Merger  and the  Merger
                  Agreement.

                  See   "The   Merger--AVECOR's    Reasons   for   the   Merger;
                  Recommendation    of   the   AVECOR   Board   of   Directors,"
                  "--Medtronic's Reasons for the Merger," "--Opinion of AVECOR's
                  Financial   Advisor,"  and   "Comparative   Stock  Prices  and
                  Dividends."  For  information  on  the  interests  of  certain
                  persons in the Merger, see "The  Merger--Interests  of Certain
                  Persons in the Merger."

AVECOR's Financial 
Advisor:          Piper Jaffray was retained by AVECOR to advise it with respect
                  to the fairness of the  consideration to be received by AVECOR
                  shareholders  in the Merger  from a  financial  point of view.
                  Piper  Jaffray has rendered its written  opinion to the effect
                  that, as of the date of such opinion,  the consideration to be
                  received in the Merger by AVECOR  shareholders  is fair to the
                  AVECOR  shareholders  from a financial point of view. The full
                  text  of  the  opinion  of  Piper   Jaffray,   which  contains
                  information as to the assumptions  made,  matters  considered,
                  and the scope and limitations on the review undertaken, is set
                  forth as  Appendix  D to this Proxy  Statement/Prospectus  and
                  should be read in its entirety.  See "The  Merger--Opinion  of
                  AVECOR's Financial Advisor."

Fluctuation in
 Market Price:    Although  the Merger  Agreement  fixes the value of  Medtronic
                  Common Stock to be issued with respect to each share of AVECOR
                  Common  Stock at  $11.125,  the number of shares of  Medtronic
                  Common  Stock to be  received  by AVECOR  shareholders  in the
                  Merger will  depend on the market  value of  Medtronic  Common
                  Stock,  which  is  subject  to  fluctuation.  Because  of such
                  fluctuation in the value of Medtronic shares, the market value
                  of Medtronic Common Stock that AVECOR shareholders  receive in
                  the Merger may increase or decrease  following the Merger. See
                  "Comparative    Stock   Prices   and   Dividends"   and   "The
                  Merger--Conversion of AVECOR Common Stock in the Merger."

Certain Federal
  Income Tax
  Consequences:   The   Merger  is   expected   to  be  treated  as  a  tax-free
                  reorganization within the meaning of Sections 368(a)(1)(A) and
                  368(a)(2)(E) of the Internal  Revenue Code of 1986, as amended
                  (the "Code").  Medtronic,  AVECOR,  and Merger Subsidiary will
                  each be a "party to the reorganization"  within the meaning of
                  Section 368(b) of the Code.

                  No gain or loss  will be  recognized  by the  shareholders  of
                  AVECOR  upon  their  receipt  of  Medtronic  Common  Stock  in
                  exchange for their AVECOR Common Stock. An AVECOR  shareholder
                  receiving  cash in lieu of a  fractional  share or  exercising
                  dissenters'  rights,  however,  will be required to  recognize
                  gain, if any, realized in the transaction but not in excess of
                  the   cash   received   by   such   shareholder.    See   "The
                  Merger--Certain Federal Income Tax Consequences."
<PAGE>

Accounting
  Treatment:      Medtronic  intends to account for the Merger as a purchase for
                  accounting and financial  reporting  purposes under  generally
                  accepted accounting  principles.  See "The  Merger--Accounting
                  Treatment of the Merger."

Treatment of Stock
 Options:         Pursuant to the terms of the  outstanding  options to purchase
                  AVECOR  Common  Stock,  such  options  that are not  otherwise
                  vested will be fully vested and exercisable as a result of the
                  Merger.   All  options  that  are  not  exercised  and  remain
                  outstanding at the Effective Time will be assumed by Medtronic
                  and will  thereafter  be  exercisable  on the same  terms  and
                  conditions,  except for appropriate adjustments to reflect the
                  Conversion  Fraction and  conversion  into options to purchase
                  Medtronic  Common Stock. See "The  Merger--Treatment  of Stock
                  Options" and "--Interests of Certain Persons in the Merger."

Interests of
 Certain Persons
 in the Merger:   In considering the recommendation of the Board of Directors of
                  AVECOR  with  respect  to  the  Plan  of  Merger,  the  Merger
                  Agreement,   and  the   transactions   contemplated   thereby,
                  shareholders of AVECOR should be aware that certain  executive
                  officers and directors of AVECOR have certain interests in the
                  Merger that are in addition  to, and may  conflict  with,  the
                  interests of shareholders of AVECOR generally. These interests
                  include,   among  other  things,   the  interests  of  certain
                  executives  and directors of AVECOR in stock options that will
                  vest and become exercisable as a result of the Merger, and the
                  obligation of Medtronic to cause AVECOR to continue to provide
                  certain  indemnification  and  related  insurance  coverage to
                  directors, officers, employees, and agents of AVECOR following
                  the Merger.

                  Two  executive  officers  of  AVECOR  have  executed  separate
                  noncompetition  agreements with Medtronic and, pursuant to the
                  terms of the Merger  Agreement,  AVECOR is required to use all
                  reasonable  efforts to cause two other executive  officers and
                  one other member of AVECOR's  management  to execute  proposed
                  noncompetition  agreements  with  Medtronic.  All executed and
                  proposed  agreements are conditioned upon the effectiveness of
                  the Merger and provide that the  individual,  upon signing the
                  agreement,   agrees  that  they  will  not  be  employed   by,
                  associated  with,  or render  services to certain  competitive
                  businesses,  anywhere  in  the  world,  for  24 or  42  months
                  (depending on the individual)  after the Merger.  In addition,
                  four  executive  officers  are  parties  to change in  control
                  agreements with AVECOR that provide certain payments and other
                  benefits to these  individuals  if, during the 12-month period
                  following a "change in  control"  of AVECOR or its  successors
                  (such as the  Merger),  (i) such  individual's  employment  is
                  terminated other than for death, disability, or "for cause" or
                  (ii) such individual  terminates his employment as a result of
                  a material  adverse change in the nature of such  individual's
                  employment.


<PAGE>

                  The  AVECOR  Board  of  Directors  was  aware of each of these
                  interests  and  considered  them,  among  other  matters,   in
                  approving the Merger Agreement.  See "The Merger--Interests of
                  Certain Persons in the Merger."

Regulatory
 Approval:        The only federal or state regulatory approval needed to effect
                  the Merger is the  expiration or termination of all applicable
                  waiting   periods   under  the   Hart-Scott-Rodino   Antitrust
                  Improvements  Act of 1976 (the "HSR Act"). On August 21, 1998,
                  Medtronic  and  AVECOR   received  a  request  for  additional
                  information  relating  to  the  notifications  that  they  had
                  earlier  filed  under the HSR Act.  This  request  extends the
                  waiting  period  during  which  the  applicable   governmental
                  authorities  can review the Merger.  The  waiting  period will
                  expire  on the  20th day  after  the  companies  substantially
                  comply  with the  request.  The  companies  intend to  respond
                  promptly to the  request.  Medtronic  and AVECOR do not expect
                  international regulatory filings that may be required, if any,
                  to  affect  the  expected  timing  of  the  Merger.  See  "The
                  Merger--Regulatory Requirements."

No Solicitation:  Pursuant   to   the   Merger   Agreement,   AVECOR   and   its
                  representatives cannot, prior to the Effective Time or earlier
                  termination  of  the  Merger  Agreement,  encourage,  solicit,
                  discuss,  or negotiate with any person (other than  Medtronic)
                  concerning  any merger,  sale,  or license of any  significant
                  portion of AVECOR's assets or similar  transaction,  except to
                  the extent required by the fiduciary obligations of the AVECOR
                  Board of Directors  and in accordance  with the  provisions of
                  the Merger Agreement.  See "The Merger--Conduct of Business of
                  AVECOR Pending the Merger."

Conditions
 to Merger:       The respective  obligations of Medtronic,  Merger  Subsidiary,
                  and  AVECOR  to  effect   the   Merger  are   subject  to  the
                  satisfaction  or waiver at or prior to the  Merger of  certain
                  conditions. See "The Merger--Conditions; Waiver."

Termination:      The Merger  Agreement may be terminated prior to the Effective
                  Time,  whether  before or after  approval of the Merger by the
                  AVECOR  shareholders,  in  certain  specified  events.  Upon a
                  termination  as a result of certain of such events,  AVECOR is
                  required  to pay  to  Medtronic  a  termination  fee of  $2.75
                  million.  See "The  Merger--Amendment  and  Termination of the
                  Merger Agreement."

Stock Option
 Agreement:       In  connection  with the  execution  of the Merger  Agreement,
                  Medtronic  and AVECOR  entered into a Stock  Option  Agreement
                  pursuant to which  AVECOR  granted to  Medtronic  an option to
                  purchase up to  1,600,851  shares of AVECOR  Common  Stock (or
                  19.9% of the  outstanding  shares of AVECOR Common Stock as of
                  July 12, 1998) at an exercise price of $11.125 per share.  The
                  option is  exercisable  upon the  occurrence of certain events
                  and  provides   Medtronic   with  the  right,   under  certain
                  circumstances,  to require AVECOR to repurchase the option for
                  its  in-the-money   value,   provided  that  the  sum  of  any
                  termination  fee and the amount paid to repurchase  the option
                  cannot  exceed  $3.6  million.  The  option,  which  Medtronic
                  required  as a  condition  to  Medtronic's  entering  into the
                  Merger Agreement,  may increase the likelihood of consummation
                  of the Merger.  See "The  Merger--Stock  Option Agreement" and
                  "--Amendment and Termination of the Merger Agreement."


<PAGE>

     Comparison of Rights of Medtronic Shareholders and AVECOR Shareholders

         Medtronic  and AVECOR are  incorporated  under the laws of the State of
Minnesota.  The rights of AVECOR  shareholders  are  currently  governed  by the
Second Restated Articles of Incorporation,  as amended,  and Bylaws, as amended,
of AVECOR.  Upon  consummation of the Merger,  AVECOR  shareholders  will become
shareholders  of  Medtronic  and their  rights as such will be  governed  by the
Restated  Articles of Incorporation and Bylaws,  as amended,  of Medtronic.  See
"The   Merger--Comparative   Rights  of   Medtronic   Shareholders   and  AVECOR
Shareholders."

               Recent Prices of Medtronic and AVECOR Common Stock

         On July 10, 1998, the last trading day preceding public announcement of
the Merger Agreement,  the reported closing sale price of Medtronic Common Stock
on the NYSE was $69.8125 per share. On that day, the reported closing sale price
of AVECOR Common Stock on the Nasdaq  National  Market was $9.875 per share.  On
[August 24], 1998, the latest  practicable  trading day prior to the printing of
this Proxy  Statement/Prospectus,  the reported  closing sale price of Medtronic
Common  Stock on the NYSE was  [$57.875]  per share.  On that day,  the reported
closing  sale price of AVECOR  Common  Stock on the Nasdaq  National  Market was
[$10.0625] per share.

         Pursuant  to the Merger  Agreement,  the actual  portion of a Medtronic
share  into which one AVECOR  share will be  converted  will be equal to $11.125
divided  by the  Average  Stock  Price  of  Medtronic  Common  Stock  for the 18
consecutive  NYSE  trading  days ending on the second  trading  day  immediately
preceding the Effective Time of the Merger.  Solely for  illustrative  purposes,
the  Conversion  Fraction  would be  0.1594  if the  Average  Stock  Price  were
calculated based on the reported closing sale price of Medtronic Common Stock on
July 10, 1998,  or [.1922] if the Average Stock Price were  calculated  based on
the reported  closing sale price of Medtronic Common Stock on [August 24], 1998.
See  "Comparative  Stock Prices and  Dividends" and "The  Merger--Conversion  of
AVECOR Common Stock in the Merger."

                               Recent Developments

         To be  eligible to use the pooling of  interests  accounting  method to
account   for  its  merger   with   Physio-Control   International   Corporation
("Physio-Control") and future transactions, Medtronic intends to sell, in one or
more  transactions,  up to approximately 12.5 million shares of Medtronic Common
Stock,  which  approximates  the number of shares  tainted  for  purposes of the
pooling of interests  accounting  method.  Medtronic  expects the offering to be
completed  prior  to  the  merger  with  Physio-Control;  however,  neither  the
consummation   of  the  Merger  nor  the   consummation   of  the  merger   with
Physio-Control  is  contingent  upon  the  completion  of  the   above-described
offering.

         On June 27,  1998,  Medtronic  entered  into an  agreement  to  acquire
Physio-Control,  a company that designs, manufactures,  markets, and services an
integrated line of noninvasive  emergency  cardiac  defibrillator and vital sign
assessment  devices,   disposable  electrodes,  and  data  management  software.
Pursuant to the acquisition agreement, Physio-Control will become a wholly-owned
subsidiary  of  Medtronic  in a  stock-for-stock  merger  that is expected to be
tax-free and accounted for using the pooling of interests accounting method.

<PAGE>


                       Selected Historical Financial Data

         The following table sets forth selected  historical  financial data for
Medtronic  as of and for each of the five  consecutive  fiscal years ended April
30, 1998, and for AVECOR as of and for each of the five consecutive fiscal years
ended  December 31, 1997 and as of and for the six-month  periods ended June 30,
1998 and 1997.  Such data should be read in  conjunction  with the  consolidated
financial statements and the unaudited condensed  consolidated interim financial
statements of Medtronic and AVECOR,  all of which are  incorporated by reference
or included herein. The consolidated  interim financial data of AVECOR as of and
for the six-month  periods ended June 30, 1998 and 1997 included herein has been
prepared, without audit, by AVECOR. Selected unaudited financial data for AVECOR
as of and for the  six-month  periods  ended June 30, 1998 and 1997  include all
adjustments  (consisting  only of  normal  recurring  adjustments)  that  AVECOR
considers  necessary  for a  fair  presentation  of the  consolidated  operating
results and financial  position as of and for such interim  periods.  Results of
operations for the interim periods are not necessarily indicative of results for
the full years. See "Information Incorporated by Reference," "Selected Financial
Data of AVECOR," and "Index to Financial Statements."

                                 MEDTRONIC, INC.
                 SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                      (in thousands, except per share data)
<TABLE>
<CAPTION>
                                                             Year Ended April 30,
                                 ---------------------------------------------------------------------------
                                     1994              1995          1996               1997        1998(2)
                                 ----------       ----------     ----------        ----------     ----------
<S>                              <C>              <C>            <C>               <C>            <C>       
Net sales....................    $1,390,922       $1,742,392     $2,172,100        $2,438,224     $2,604,819
Net earnings.................       232,357          294,000        428,306           529,988        457,382
Basic earnings per share(1)..          0.51             0.64           0.90              1.11           0.98
Diluted earnings per
share(1).....................          0.50             0.63           0.89              1.09           0.96
Total assets.................     1,623,252        1,946,732      2,554,700         2,409,210      2,774,727
Long-term debt...............        20,232           14,200         15,336            13,980         16,227
Cash dividends per share(1)..          0.09             0.10           0.13              0.19           0.22
</TABLE>

                           AVECOR CARDIOVASCULAR INC.
                 SELECTED HISTORICAL CONSOLIDATED FINANCIAL DATA
                      (in thousands, except per share data)
<TABLE>
<CAPTION>

                                          Year Ended December 31,                                Six Months Ended
                            -----------------------------------------------------------       ----------------------
                                                                                               June 30,     June 30,
                             1993          1994         1995       1996(3)        1997          1997         1998
                            -------      -------      -------      -------      -------       -------        -------
                                                                                                     (Unaudited) 

<S>                         <C>          <C>          <C>          <C>          <C>           <C>            <C>    
Net sales.............      $14,125      $21,486      $33,340      $44,401      $46,864       $24,004        $26,021
Net income (loss).....       (1,650)         (39)       3,296         (567)       1,327           790            630
Basic earnings per
share.................        (0.26)       (0.01)        0.47        (0.07)        0.17          0.10           0.08
Diluted earnings per
share.................        (0.26)       (0.01)        0.45        (0.07)        0.17          0.10           0.08
Total assets..........       15,031       15,877       33,519       37,161       42,759        44,363         46,049
Long-term debt........            0            0            0            0        4,694         4,823          4,632
Cash dividends per
share.................            0            0            0            0            0             0              0
</TABLE>
- -------------------

<PAGE>

(1)      In  each  of  September  1994,  September  1995,  and  September  1997,
         Medtronic  effected a two-for-one  common stock split, paid in the form
         of a 100% stock  dividend.  All  references in the Selected  Historical
         Consolidated  Financial Data to Medtronic's earnings per share and cash
         dividends per share have been restated to reflect these stock splits.

(2)      Medtronic's  net  earnings,  basic  earnings  per  share,  and  diluted
         earnings  per  share  reflect  the  impact of  $205.3  million  pre-tax
         nonrecurring charges recorded in the third quarter of fiscal 1998.

(3)      AVECOR's  net income  (loss),  basic  earnings  per share,  and diluted
         earnings per share include a $4.2 million pre-tax loss resulting from a
         litigation settlement with COBE Laboratories, Inc.


<PAGE>


                           Comparative Per Share Data

         The following  summary sets forth certain  historical per share data of
Medtronic and AVECOR and combined per share data on an unaudited pro forma basis
after  giving  effect to the Merger on a  purchase  basis  assuming,  solely for
illustrative  purposes of this  presentation,  that the Average  Stock Price for
Medtronic  Common  Stock  is  [$57.875]  (the  reported  closing  sale  price of
Medtronic  Common Stock on [August 24],  1998).  The actual  Average Stock Price
that will be used in the Merger  will be the Average  Stock  price of  Medtronic
Common  Stock for the 18  consecutive  NYSE  trading  days  ending on the second
trading  day  immediately  preceding  the  Effective  Time  of the  Merger.  The
unaudited pro forma data is provided for comparative  purposes only and does not
purport to be  indicative  of actual or future  operating  results or  financial
position that would have occurred or will occur upon consummation of the Merger.
The information  presented below should be read in conjunction with the selected
historical  financial data and the separate historical  financial  statements of
Medtronic and AVECOR,  including the notes thereto,  included or incorporated by
reference in this Proxy  Statement/Prospectus.  See "Information Incorporated by
Reference" and "Index to Financial  Statements."  Presentation of full pro forma
financial  statements is not included  because the Merger does not  constitute a
significant  business  combination  and  the  disclosure  is  not  deemed  to be
material. 
<TABLE>
<CAPTION>
                                                                                  Basic       Diluted
                                                                                Earnings      Earnings
                                                                               (Loss) From   (Loss) From
                                                                    Book       Continuing    Continuing        Cash
                                                                    Value      Operations    Operations      Dividends
<S>                                                                 <C>         <C>            <C>            <C>  
MEDTRONIC HISTORICAL  DATA:
Per Medtronic share at and for the fiscal year ended April 30,
 1998(1)............................................................$4.36       $0.98          $0.96          $0.22
Per Medtronic share for the fiscal year ended April 30,  1997.......  *          1.11           1.09           0.19
Per  Medtronic  share  for the  fiscal  year  ended  April 30, 1996.. *          0.90           0.89           0.13

AVECOR HISTORICAL DATA:
Per AVECOR share at and for the 3 months ended June 30, 1998         4.16        0.05           0.05              0
(unaudited)........................................................
Per AVECOR share at and for the 12 months ended March 31, 1998       4.11        0.15           0.14              0
(unaudited)........................................................
Per AVECOR share for the fiscal year ended December 31, 1997.......  4.07        0.17           0.17              0
Per AVECOR share for the fiscal year ended  December 31, 1996(2)...    *        (0.07)         (0.07)             0

MEDTRONIC AND AVECOR PRO FORMA
COMBINED DATA(4):
Per Medtronic share at and for the fiscal year ended April 30,
1998(1) (3)........................................................  4.41        0.96           0.95           0.22
Per AVECOR share equivalent(5) at and for the fiscal year ended
April 30, 1998(1)(3)...............................................  0.85        0.19           0.18           0.04
</TABLE>
- -------------------

(1)      Medtronic's  basic  earnings  from  continuing  operations  and diluted
         earnings  from  continuing  operations  reflect  the  impact  of $205.3
         million pre-tax  nonrecurring  charges recorded in the third quarter of
         fiscal 1998.
<PAGE>

(2)      AVECOR's  net income  (loss),  basic  earnings  per share,  and diluted
         earnings per share include a $4.2 million pre-tax loss resulting from a
         litigation settlement with COBE Laboratories, Inc.

(3)      The  combined  pro forma data  combine  the  financial  information  of
         Medtronic  at and for the year ended April 30, 1998 with the  unaudited
         financial  information  of AVECOR at and for the 12-month  period ended
         March 31, 1998.

(4)      Pro forma information  includes the dilutive impact of estimated annual
         goodwill amortization and foregone interest income.

(5)      The equivalent pro forma combined information  represents the pro forma
         combined net income and book value multiplied by [.1922],  which is the
         assumed Conversion Fraction (based on an assumed Average Stock Price of
         [$57.875]) solely for purposes of this illustration.

* Disclosure is not required.


<PAGE>


                               GENERAL INFORMATION

         This Proxy  Statement/Prospectus is being furnished to the shareholders
of AVECOR in  connection  with the  solicitation  by the Board of  Directors  of
AVECOR of proxies to be voted at the Meeting to be held on ___________, 1998.

         At the Meeting,  AVECOR shareholders will be asked to consider and vote
upon the  approval  of the Plan of Merger and the Merger  Agreement  attached to
this Proxy  Statement/Prospectus as Appendices A and B, respectively,  providing
for the Merger of Merger  Subsidiary,  a  wholly-owned  subsidiary of Medtronic,
with and into  AVECOR,  as a result of which  AVECOR will become a  wholly-owned
subsidiary of Medtronic.  Other terms and  provisions  related to the Merger are
set forth in the Merger Agreement, as described herein.

         The Board of Directors of AVECOR has  unanimously  approved the Merger.
The Board of Directors of Medtronic  has approved the Merger and the issuance of
shares of Medtronic Common Stock in the Merger. See "The  Merger--Background  of
the  Merger."   Applicable   Minnesota  law  does  not  require  that  Medtronic
shareholders  approve  the  Merger,  and  no  such  approval  is  being  sought.
Medtronic,  as the sole  shareholder  of Merger  Subsidiary,  has  approved  the
Merger.

         Pursuant  to  the  Plan  of  Merger  and  the  Merger  Agreement,  upon
effectiveness  of the Merger,  each  outstanding  share of AVECOR  Common  Stock
(except  for shares of AVECOR  Common  Stock  owned by  Medtronic  and shares of
AVECOR  Common  Stock held by  shareholders  who properly  exercise  dissenters'
rights  under  Minnesota  law) will be  converted  into the  right to  receive a
portion  of a share  of  Medtronic  Common  Stock.  See  "The  Merger--General,"
"--Conversion of AVECOR Common Stock in the Merger," and "--Rights of Dissenting
AVECOR Shareholders."

         The close of business on __________,  1998 (the "Record Date") has been
fixed as the record date for determination of the holders of AVECOR Common Stock
who are  entitled  to  receive  notice of and to vote at the  Meeting  or at any
adjournment  thereof.  As of the Record Date, there were  [8,044,475]  shares of
AVECOR Common Stock  outstanding held by approximately  [315] holders of record.
The  holders of record on the Record Date of shares of AVECOR  Common  Stock are
entitled to one vote per share at the  Meeting.  The  presence at the Meeting in
person or by proxy of the  holders of a majority  of the  outstanding  shares of
AVECOR  Common  Stock  entitled  to  vote  will  constitute  a  quorum  for  the
transaction of business.  The  affirmative  vote of the holders of a majority of
the  outstanding  shares of AVECOR  Common Stock is required for approval of the
Merger.  Directors and  executive  officers of AVECOR have agreed to vote AVECOR
shares  owned by them in favor of the Merger.  Medtronic  intends to have all of
the  346,960  shares of AVECOR  stock owned by  Medtronic  voted in favor of the
Merger. See "The Merger--Vote Required" and "--Voting Agreements."

         Representatives  of  PricewaterhouseCoopers  LLP, AVECOR's  independent
accountants,  are  expected to be present at the Meeting.  Such  representatives
will have the opportunity to make a statement if they so desire and are expected
to be available to respond to appropriate questions. (On July 1, 1998, Coopers &
Lybrand L.L.P merged with Price  Waterhouse  LLP to form  PricewaterhouseCoopers
LLP.)

         A  proxy  card  is  enclosed  for  use  by  AVECOR  shareholders.  Such
shareholders are solicited on behalf of the Board of Directors of AVECOR to SIGN
AND RETURN THE PROXY CARD IN THE ACCOMPANYING  ENVELOPE.  No postage is required
if mailed within the United States.


<PAGE>

         All properly  executed proxies not revoked will be voted at the Meeting
in accordance with the instructions  contained therein.  Proxies that are signed
by  shareholders  but  lack  specific  instructions  will be  voted  in favor of
approval of the Merger.  A shareholder who has executed and returned a proxy may
revoke it at any time before it is voted at the  Meeting,  but only by executing
and  returning  a proxy  bearing  a later  date,  by  giving  written  notice of
revocation to the Secretary of AVECOR, or by attending the Meeting and voting in
person.   Abstentions  will  be  treated  as  shares  present  for  purposes  of
determining  a quorum for the  Meeting  but will have the same  effect as a vote
against  approval of the Merger.  If a broker or other record  holder or nominee
indicates on a proxy that it does not have  direction or authority as to certain
shares to vote on the Merger,  those  shares will be  considered  present at the
Meeting for purposes of  determining a quorum but will have the same effect as a
vote against approval of the Merger.

         If any other matters are properly  presented for  consideration  at the
Meeting,  the persons named in the enclosed form of proxy and acting  thereunder
will have  discretion  to vote on such  matters  in  accordance  with their best
judgment.

         THE BOARD OF DIRECTORS OF AVECOR  RECOMMENDS THAT THE SHAREHOLDERS VOTE
FOR THE APPROVAL OF THE PLAN OF MERGER.  See "The  Merger--Interests  of Certain
Persons in the Merger" for a discussion  of  conflicts of interest  that certain
directors and members of  management  of AVECOR may have in connection  with the
Merger.

         SHAREHOLDERS  SHOULD NOT SEND THEIR STOCK CERTIFICATES WITH THEIR PROXY
CARDS.

         In addition to soliciting proxies by mail, the directors,  officers, or
regular  employees  of AVECOR  may,  but without  compensation  other than their
regular compensation,  solicit proxies personally or by telephone or fax. AVECOR
intends to  reimburse  brokerage  houses  and other  custodians,  nominees,  and
fiduciaries for reasonable  out-of-pocket expenses incurred in forwarding copies
of  solicitation  material to  beneficial  owners of AVECOR Common Stock held of
record by such persons.  AVECOR and  Medtronic  have agreed to share equally all
expenses relating to the printing and mailing of this Proxy Statement/Prospectus
and the filing of it with the Commission.

         The  mailing  of this Proxy  Statement/Prospectus  to  shareholders  of
AVECOR is expected to commence on or about ______________, 1998.

<PAGE>

                                   THE MERGER

         Set forth below is a brief  description  of certain terms of the Merger
Agreement and related matters.  This description does not purport to be complete
and is  qualified  in its  entirety by  reference  to the Plan of Merger and the
Merger  Agreement,  which  are  attached  hereto as  Appendices  A and B and are
incorporated herein by reference.

General

         Medtronic,  Merger Subsidiary,  and AVECOR have entered into the Merger
Agreement,  which provides that Merger  Subsidiary  will be merged with and into
AVECOR,  with AVECOR  becoming a  wholly-owned  subsidiary of Medtronic.  In the
Merger, AVECOR will change its name to "Medtronic AVECOR  Cardiovascular,  Inc."
Each outstanding  share of AVECOR Common Stock (except shares owned by Medtronic
and shares held by AVECOR  shareholders  who perfect  dissenters'  rights  under
Minnesota  law) will be converted at the Effective  Time (as defined below) into
the right to receive the portion of a share of  Medtronic  Common Stock equal to
$11.125  divided by the Average  Stock  Price of  Medtronic  Common  Stock for a
specified  determination  period, as described in further detail below. See "The
Merger--Conversion of AVECOR Common Stock in the Merger."

Effective Time of the Merger

         As soon as  practicable  after the  conditions to  consummation  of the
Merger  described  below have been  satisfied  or waived,  and unless the Merger
Agreement has been terminated as provided below,  articles of merger  containing
the Plan of Merger  will be filed  with the  Secretary  of State of the State of
Minnesota,  at which time the  Merger  will  become  effective  (the  "Effective
Time"). It is presently  contemplated that the Effective Time will be as soon as
practicable   after   approval   of  the  Merger  at  the   Meeting.   See  "The
Merger--Conditions; Waiver."

Background of the Merger

         The  terms of the  Merger  Agreement  are the  result  of  arm's-length
negotiations between representatives of Medtronic and AVECOR. The following is a
brief discussion of the background of these negotiations, the Merger and related
discussions.

         Over  a  period  of  time,  AVECOR's  Board  of  Directors  and  senior
management had explored methods of enhancing  shareholder value through internal
growth and development, the acquisition of technology, or the formation of joint
ventures with others in the medical device or  cardiopulmonary  bypass  products
industries.

         In November 1997,  AVECOR engaged Piper Jaffray  exclusively to explore
various strategic  alternatives for AVECOR,  including the acquisition of 15% or
more of  AVECOR's  equity or assets by a third  party.  In  connection  with its
engagement,  Piper Jaffray  explored the  alternatives of AVECOR  continuing its
current strategy of internal growth,  expanding into other businesses within the
cardiopulmonary market or making acquisitions within a new market.

         In December 1997,  AVECOR  management was contacted by and met with the
management of Suitor A, a company engaged in, among other things, medical device
businesses   other  than  in  the   cardiopulmonary   market  to   discuss   the
cardiopulmonary industry. No discussions were held as to the terms of a possible
transaction.


<PAGE>

         On March 3,  1998,  AVECOR  executives  and  executives  of Suitor B, a
large,  diversified  medical products  company with an existing  business in the
cardiopulmonary  market,  met  to  discuss  a  potential  business  combination.
Representatives of Piper Jaffray and Suitor B's investment banker, together with
AVECOR  and  Suitor  B's  executives,  met  again on March 31,  1998 to  discuss
financial projections of AVECOR and potential combination synergies.  Subsequent
to a meeting and  additional  discussion  between  Piper  Jaffray and Suitor B's
investment  banker,  Suitor B submitted a nonbinding  indication  of interest on
April 16, 1998. Piper Jaffray  presented such indication of interest to AVECOR's
Board at a meeting held on April 21, 1998.

         Following that Board meeting,  further  discussions  took place between
Piper Jaffray and Suitor B's  investment  banker.  These  discussions  primarily
concerned  valuation  issues  and  were  undertaken  by Piper  Jaffray  with the
objective  of moving  Suitor B towards a higher  valuation  of AVECOR.  Suitor B
refused to increase the valuation set forth in its April 16, 1998  indication of
interest.  Suitor B was then  allowed to conduct due  diligence  on AVECOR for a
period of three  weeks,  beginning  on May 6,  1998.  On May 21,  1998,  Anthony
Badolato,  the Chief Executive  Officer of AVECOR,  and an executive of Suitor B
discussed  conditions  of  Suitor  B to  proceeding  with a  transaction.  These
discussions resulted in an impasse.

         On May 5, 1998, Mr.  Badolato  received a telephone call from Suitor A,
indicating  an interest to meet and discuss a potential  combination.  On May 6,
1998,  Piper Jaffray  talked with Suitor A to qualify Suitor A's interest and to
discuss Suitor A's preliminary  valuation  range.  The AVECOR Board of Directors
met on May 7,  1998,  and  Piper  Jaffray  reviewed  some  of the  aspects  of a
potential  transaction  with either Suitor A or Suitor B, and it was agreed that
management would meet with representatives of Suitor A. On May 11, 1998, members
of AVECOR and Suitor A's senior  management  met to discuss the  cardiopulmonary
market and a potential  combination.  Following an evaluation  and analysis of a
potential  combination  during  the weeks of May 11 and May 18,  1998,  Suitor A
decided not to proceed further.

         On May 27, 1998,  Suitor C, a large  potential  financial  buyer with a
history of acquiring medical device  businesses,  met with AVECOR management and
Piper Jaffray to discuss, on a very preliminary basis, a potential  combination.
Following an evaluation of a potential  combination,  Suitor C determined not to
pursue such a transaction with AVECOR.  This  determination  was communicated to
Piper Jaffray in early June 1998.

         Also on May 27,  1998,  Glen D.  Nelson,  M.D.,  the Vice  Chairman  of
Medtronic,  contacted  Mr.  Badolato by telephone  and  indicated an interest in
meeting  with Mr.  Badolato  to  discuss a range of topics  concerning  AVECOR's
products,  consolidation in the medical device industry,  and possible synergies
between Medtronic and AVECOR.  On June 1, 1998, Dr. Nelson,  Philip M. Laughlin,
Medtronic's  Senior Vice  President  and  President,  Cardiac  Surgery,  and Mr.
Badolato had a meeting during which Dr. Nelson expressed Medtronic's interest in
acquiring AVECOR. On June 5, 1998,  Medtronic submitted a nonbinding  indication
of interest to acquire AVECOR.  Based on this indication of interest,  Medtronic
was permitted to conduct due diligence on AVECOR.

         On June 8, 1998, Piper Jaffray had further  discussions with Suitor B's
investment  banker and  informed  Suitor B's  investment  banker that AVECOR had
received an indication of interest from another party.


<PAGE>

         During the weeks of June 8 and June 15, 1998,  Medtronic  conducted due
diligence,  examining the same written materials  regarding AVECOR's  operations
that had been made available on a confidential basis to Suitor B.

         On June 12, 1998, Piper Jaffray had additional  discussions with Suitor
B's investment  banker and informed Suitor B's investment  banker that a meeting
of AVECOR's  Board of Directors  was  scheduled for the week of June 22, 1998 to
discuss all indications of interest that had been expressed.  Piper Jaffray also
invited Suitor B's investment banker to update Suitor B's indication of interest
before the scheduled  meeting of AVECOR's Board,  and in doing so to address the
conditions that had previously resulted in an impasse.

         On June 19 and June 22,  1998,  representatives  of Piper  Jaffray  and
Medtronic had various telephone conversations focusing on valuation and process.
On June 24, 1998,  Medtronic  submitted a revised  indication of interest in the
form of a terms  sheet,  containing a price  greater than that  contained in the
June 5, 1998 indication of interest.

         During this June time period,  Suitor D, another company engaged in the
cardiopulmonary   business,   called  Mr.   Badolato   to  discuss  a  potential
combination,  renewing  discussions that had previously been carried on in early
1997. An executive of Suitor D and Mr. Badolato met in New York on June 13, 1998
to discuss a  potential  transaction.  On June 16,  1998,  Suitor D  submitted a
nonbinding indication of interest.

         On June 19, 1998, AVECOR received a revised,  nonbinding  indication of
interest from Suitor B. This revised  indication of interest did not represent a
change in the  valuation  set forth in Suitor B's April 16, 1998  indication  of
interest,  but did  indicate  certain  flexibility  on the part of Suitor B with
respect to the conditions that had previously resulted in an impasse.

         On  June  24,  1998,   members  of  AVECOR's  senior   management  made
presentations to Suitor D's management.

         On June 25,  1998,  the AVECOR  Board met to discuss  the June 19, 1998
revised,  nonbinding  indication  of  interest  from Suitor B, the June 16, 1998
nonbinding  indication  of  interest  by  Suitor  D, and the  revised  Medtronic
indication  of interest  (in the form of a terms  sheet) of June 24,  1998.  The
AVECOR Board  authorized  continued due diligence and  negotiation of a possible
agreement with Medtronic.

         On June 25, 1998,  the Board of  Directors  of  Medtronic  approved the
acquistion of AVECOR,  subject to final negotiations by senior  management,  and
authorized  Medtronic's officers to undertake all acts necessary or desirable to
effect the Merger.

         On June 26, 1998, Piper Jaffray informed Suitor B of the AVECOR Board's
decision to negotiate  with  another  company.  On the same date,  AVECOR sent a
revised terms sheet modifying Medtronic's written proposal to Medtronic.  During
the morning of June 29, 1998,  Suitor B submitted a further revised,  nonbinding
indication of interest, which did not change the price set forth in the April 16
and June 19, 1998  indications of interest but removed the  conditions  that had
previously  led to the  impasse in  AVECOR's  discussions  with  Suitor B. Piper
Jaffray  contacted  Suitor B's  investment  banker on the same day to discuss an
increased price, but the request for a higher price was refused.


<PAGE>

         In  addition,  on the  same  date,  Piper  Jaffray  informed  Suitor  D
regarding  the AVECOR  Board's  decision to negotiate  with a company other than
Suitor D.

         During the afternoon of June 29, 1998,  AVECOR and Medtronic  discussed
the revised  terms sheet sent to Medtronic on June 26, 1998.  Prior to execution
of  the  terms  sheet  with  Medtronic,  Piper  Jaffray  contacted  Suitor  B to
acknowledge  receipt of Suitor B's June 29, 1998 revised  indication of interest
and  to  inform  Suitor  B  that  AVECOR  would  be  proceeding  with  exclusive
negotiations  with  another  party.  Late in the  afternoon  on June 29,  AVECOR
executed a nonbinding  terms sheet with  Medtronic,  containing  the $11.125 per
share  consideration  in the form of Medtronic  Common Stock and providing  that
negotiations  would be held only  between  AVECOR and  Medtronic  until July 24,
1998.

         On July 1, 1998,  Suitor B  submitted  another  revised  indication  of
interest containing a price higher than set forth in its previous indications of
interest, but still significantly lower than the price offered by Medtronic.  No
contact was made with Suitor B, given the exclusivity  arrangement  contained in
the executed terms sheet with Medtronic.

         During the period of July 7-12,  1998,  members of  Medtronic's  senior
management  and  Medtronic's  legal counsel met with members of AVECOR's  senior
management,  representatives  of Piper  Jaffray,  and AVECOR's legal counsel and
held detailed discussions regarding the possible terms of a merger involving the
two  companies.  With  the  advice  of legal  counsel  and  financial  advisors,
Medtronic and AVECOR  negotiated the terms of the Merger Agreement and the Stock
Option Agreement.

         On July 10,  1998,  AVECOR  received a letter from Suitor B  indicating
that Suitor B was prepared to significantly  increase the price contained in its
prior indications of interest,  but which failed to specify a price.  Suitor B's
indication  of interest  was subject to AVECOR not having  executed a definitive
agreement with another party, due diligence  investigation,  Board approval, and
other conditions. AVECOR's senior management,  representatives of Piper Jaffray,
and  AVECOR's  legal  counsel  discussed  the letter from Suitor B at that time.
Later that day,  Piper  Jaffray  informed  Medtronic  that AVECOR had received a
revised proposal from another party, and invited Medtronic to increase the price
per share it would  offer  prior to  presentation  of the  Merger  Agreement  to
AVECOR's Board of Directors. Medtronic declined.

         On July 12, 1998,  AVECOR's Board of Directors held a special telephone
meeting to review,  with the advice and  assistance of AVECOR's  management  and
financial and legal  advisors,  the proposed  Merger  Agreement and Stock Option
Agreement and the transactions contemplated thereby. Piper Jaffray also reviewed
the terms of Suitor  B's July 10,  1998  letter,  pointing  out that a new offer
price had not been  stated,  that the amount of Suitor B's last offer  price was
below  the  price  being  offered  by  Medtronic,  and  that  there  were  other
uncertainties  regarding this proposal.  Piper Jaffray further indicated that it
had advised  Medtronic that a competing offer might be forthcoming,  had invited
Medtronic to increase its offer,  and that  Medtronic  chose not to increase its
offer.  After  extensive  discussion  and  consideration  of various  materials,
including  drafts of the agreements and a presentation  by Piper Jaffray setting
forth its analysis of the  proposed  transaction,  the AVECOR Board  unanimously

<PAGE>

approved  the  Merger,  subject  to the  resolution  of  various  issues  within
guidelines  established  by the AVECOR  Board.  The Board also amended  AVECOR's
shareholder  rights plan to provide  that the Merger  would not cause the rights
contemplated by the plan to become exercisable.

         In the evening of July 12, 1998,  following resolution of the remaining
issues,  Medtronic  and AVECOR  executed the Merger  Agreement  and Stock Option
Agreement.  On July 13,  1998,  prior to the  opening  of  trading on the Nasdaq
National Market and the NYSE,  Medtronic and AVECOR issued a joint press release
announcing the execution of the Merger Agreement.

AVECOR's Reasons for the Merger; Recommendation of the AVECOR Board of Directors

         At the July 12, 1998 meeting,  the AVECOR Board unanimously  determined
that the  Merger  is in the  best  interests  of  AVECOR  and its  shareholders,
approved  and  adopted  the  Merger  Agreement  and  the  Plan  of  Merger,  and
recommended  that  AVECOR  shareholders  vote to  approve  and adopt the  Merger
Agreement, the Plan of Merger, and the transactions contemplated thereby.

         Prior to making its  determination,  the AVECOR  Board  consulted  with
senior  management with respect to strategic and  operational  matters and legal
counsel  with  respect  to the legal  duties  of the  AVECOR  Board,  regulatory
matters, tax matters, and the Merger Agreement,  the Stock Option Agreement, and
the  voting  agreements  and  issues  related  thereto.  The  AVECOR  Board also
consulted with Piper Jaffray,  financial advisor to AVECOR,  with respect to the
financial aspects and fairness from a financial point of view of the $11.125 per
share  consideration to be received by the  shareholders of AVECOR.  In reaching
its  determination to approve and adopt the Merger  Agreement,  the AVECOR Board
also considered a number of factors, including, without limitation:

         (i)      the business, earnings,  operations,  financial condition, and
                  prospects of Medtronic and AVECOR,  both individually and on a
                  combined  basis,  including,  but not limited to, AVECOR's and
                  Medtronic's  respective recent and historic stock and earnings
                  performance;

         (ii)     the financial  analyses and other  information with respect to
                  AVECOR and  Medtronic  presented  to the AVECOR Board by Piper
                  Jaffray, as well as the AVECOR Board's own knowledge of AVECOR
                  and Medtronic and their respective businesses;

         (iii)    AVECOR's  strategic   alternatives,   including   remaining  a
                  separate   company   and   growing   internally   or   through
                  acquisitions,  remaining a separate  company for the near term
                  while continuing to explore a future acquisition of AVECOR, or
                  engaging  in a merger of equals or joint  venture  transaction
                  with  another  party,  including  certain  risks  involved  in
                  remaining a separate company such as the risks of being unable
                  to  meet  or  exceed  projections  and  growth  rates  due  to
                  increasing  competitive  pressures  in  the  markets  for  its
                  products;

         (iv)     certain  factors  influencing  the  heart/lung  bypass  device
                  industry,  including pricing pressures  affecting  products in
                  the heart/lung bypass circuit, the need to compete by offering
                  a complete line of devices for the heart/lung  bypass circuit,
                  centralization  of  customer  purchasing  decisions  by  group
                  purchasing and managed care  organizations,  and the impact of
                  competitor   acquisitions  and  control  of  groups  providing
                  perfusion services to hospitals;


<PAGE>

         (v)      the overall strategic fit between AVECOR and Medtronic in view
                  of  their  respective  product  lines,  which  together  would
                  provide  current  AVECOR  customers  with a  complete  line of
                  products  in the  heart/lung  bypass  circuit  from  a  single
                  source,  as well as their respective  markets and distribution
                  channels and the potential synergies,  efficiencies,  and cost
                  savings that could be realized through a combination of AVECOR
                  and Medtronic;

         (vi)     the amount and form of the  consideration  to be  received  by
                  AVECOR  shareholders  in the Merger,  the  historical  trading
                  ranges of AVECOR Common Stock and Medtronic  Common Stock, and
                  the  estimated   future   financial   results  of  AVECOR  and
                  Medtronic;

         (vii)    the opportunity  for AVECOR  shareholders to receive a premium
                  over the market  price for their shares  immediately  prior to
                  the  announcement of the Merger (with the  consideration to be
                  received  representing a premium of  approximately  74.4% over
                  the closing price of $6.38 per share of AVECOR Common Stock as
                  of the  date  four  weeks  prior  to the  announcement  of the
                  Merger);

         (viii)   the opportunity for AVECOR shareholders to receive future cash
                  dividends with respect to their shareholdings;

         (ix)     the  opportunity  for AVECOR  shareholders  to continue equity
                  participation in a larger,  more diversified  medical products
                  enterprise  and to share in the long-term  growth of Medtronic
                  following   the  Merger,   including   participation   in  the
                  combination of benefits referred to above, if achieved;

         (x)      the effect of the Merger on AVECOR  employees and benefits and
                  opportunities potentially available to AVECOR employees within
                  the combined company;

         (xi)     the financial advice provided by Piper Jaffray and the written
                  opinion  of Piper  Jaffray  that,  based  upon and  subject to
                  certain  matters  set  forth in the  opinion  and  such  other
                  factors  as Piper  Jaffray  considered  relevant,  it is Piper
                  Jaffray's  opinion  that  the  consideration  proposed  to  be
                  received by the  shareholders of AVECOR in the Merger pursuant
                  to the Merger  Agreement  is fair,  from a financial  point of
                  view,  to the  shareholders  of  AVECOR  as of the date of the
                  opinion of July 12, 1998 (with the full text of such  opinion,
                  which should be read in its  entirety by AVECOR  shareholders,
                  attached  as  Appendix D to this  Proxy  Statement/Prospectus,
                  setting forth the procedures followed, the factors considered,
                  and the assumptions made by Piper Jaffray);

         (xii)    the terms and  conditions of the Merger  Agreement,  including
                  the  consideration  to be  received  by  the  shareholders  of
                  AVECOR,   the  parties'   representations,   warranties,   and
                  covenants, the conditions to their respective obligations, the
                  amount of termination  fees payable under the Merger Agreement
                  and the  circumstances  under which such termination fees will
                  be  payable,  and the  likelihood  that  the  Merger  would be
                  consummated;

         (xiii)   the  terms  and  conditions  of the  Stock  Option  Agreement,
                  including  the  circumstances  under  which the  stock  option
                  granted thereunder will be exercisable; and


<PAGE>

         (xiv)    that the  Merger  will be  accounted  for under  the  purchase
                  method of  accounting  and that as a  condition  to the Merger
                  Agreement  the  Merger  will  be a  tax-free  transaction  for
                  federal income tax purposes.

         In view of the  number  and  wide  variety  of  factors  considered  in
connection with its evaluation of the Merger,  the AVECOR Board did not consider
it practicable to, nor did it attempt to, quantify or otherwise  assign relative
weights to the specific factors  considered in reaching its  determination.  The
AVECOR  Board  viewed its  position  and  recommendations  as being based on the
totality of the  information  and factors  presented to and considered by it. In
addition, individual members of the AVECOR Board may have given different weight
to different information and factors. See "--Background of the Merger."

         BASED UPON ITS  CONSIDERATION OF THE FOREGOING MATTERS AND OTHER ADVICE
AND  INFORMATION  DEEMED  RELEVANT,  THE AVECOR BOARD OF  DIRECTORS  UNANIMOUSLY
RECOMMENDS  THAT  AVECOR  SHAREHOLDERS  VOTE TO  APPROVE  AND  ADOPT THE PLAN OF
MERGER, THE MERGER AGREEMENT, AND THE TRANSACTIONS CONTEMPLATED THEREBY.

Medtronic's Reasons for the Merger

         Medtronic   believes  that  the  acquisition  of  AVECOR  will  enhance
Medtronic's surgical perfusion product line offerings and that, by concentrating
on the best technologies from both Medtronic and AVECOR,  Medtronic will augment
its  offerings  of  industry-leading  products as it  streamlines  manufacturing
capabilities and achieves efficiencies of scale.

Opinion of AVECOR's Financial Advisor

         Pursuant to an  engagement  letter  dated  November  14,  1997,  AVECOR
retained  Piper  Jaffray to act as its  exclusive  representative  and financial
advisor and, if requested,  to render to the Board of Directors an opinion as to
the  fairness,  from a  financial  point of  view,  of the  consideration  to be
received by AVECOR shareholders in the Merger.

         At a meeting of the Board of Directors on July 12, 1998,  Piper Jaffray
made a presentation  summarizing the proposal to acquire  AVECOR,  analyzing the
proposal (in a manner  similar to that  summarized  below),  and  rendering  its
written  opinion to the Board of Directors to the effect that,  as of such date,
and subject to the assumptions,  factors, and limitations set forth therein, the
consideration  to be  received  by AVECOR  shareholders  pursuant  to the Merger
Agreement is fair,  from a financial  point of view, to AVECOR  shareholders.  A
copy of Piper Jaffray's  written  opinion dated July 12, 1998,  which sets forth
the assumptions  made,  matters  considered,  and limits on the review taken, is
attached as Appendix D to this Proxy  Statement/Prospectus  and is  incorporated
herein by reference (the "Piper Jaffray Opinion"). AVECOR shareholders are urged
to read the Piper Jaffray Opinion in its entirety.  The description of the Piper
Jaffray  Opinion set forth  herein is  qualified in its entirety by reference to
the full text of such opinion.  The Piper Jaffray  Opinion is directed to and is
for the use and benefit of the Board of  Directors  of AVECOR and is rendered to
the Board of Directors in connection with its  consideration of the Merger.  The
opinion is not intended to be and does not  constitute a  recommendation  to any
shareholder as to how such shareholder should vote with respect to the Merger.

         In arriving at its opinion,  Piper Jaffray made such review,  analyses,
and inquiries as it deemed  necessary and appropriate  under the  circumstances.
Among other  things,  it reviewed  (i) a draft dated July 10, 1998 of the Merger
Agreement,  (ii) certain public information related to Medtronic,  (iii) certain

<PAGE>

publicly  available  financial  and  securities  data of Medtronic  and selected
public companies deemed comparable to Medtronic, (iv) certain analyst reports on
Medtronic, (v) to the extent publicly available, information concerning selected
transactions  deemed  comparable to the proposed  Merger,  (vi) certain publicly
available  information  relative to AVECOR and selected public  companies deemed
comparable to AVECOR, (vii) certain unaudited internal financial  information of
AVECOR on a stand-alone  basis  prepared for financial  planning  purposes,  and
furnished by AVECOR management,  and (viii) certain publicly available financial
and securities data of AVECOR. Piper Jaffray had discussions with members of the
management of AVECOR  concerning  the  financial  condition,  current  operating
results, and business outlook for AVECOR on a stand-alone basis.

         Piper Jaffray relied upon and assumed the accuracy,  completeness,  and
fairness of the financial  statements and other information  provided by AVECOR,
or otherwise made available to Piper Jaffray, and did not assume  responsibility
for the independent verification of such information.  Piper Jaffray relied upon
the  assurance  of the  management  of AVECOR that the  information  provided by
AVECOR had been prepared on a reasonable  basis,  and, with respect to financial
planning  data  and  other  business  outlook  information,  reflected  the best
currently available  estimates,  and that they were not aware of any information
or facts that would make the information provided incomplete or misleading.

         Set forth below is a summary of selected  analyses Piper Jaffray relied
upon in rendering its opinion:

Stock Trading History

         Piper  Jaffray  reviewed  the stock  trading  history of AVECOR  Common
Stock.  Piper  Jaffray  presented  the  following  stock  price  data for AVECOR
relative to specified periods prior to July 9, 1998:

             Proposed Merger Price                             $11.125
             30 day average                                    $7.00
             60 day average                                    $6.94
             90 day average                                    $6.97
             52 week high                                      $12.88
             52 week low                                       $5.00

         Piper Jaffray also presented  stock price and volume  performance  data
for AVECOR  Common Stock for specified  periods,  and the  relationship  between
movements in the trading  prices of AVECOR Common Stock and movements in trading
prices of the common stock of comparable companies and Nasdaq Composite Index.

Comparable Company Analysis

         Piper Jaffray compared selected financial data and ratios for AVECOR to
the corresponding  data and ratios for a group of companies deemed comparable to
AVECOR,  all of which are publicly  traded  medical  technology  companies.  The
Comparable Company Group consisted of the following nine  publicly-held  medical
technology companies:  ATS Medical Inc.,  Haemonetics  Corporation,  ICU Medical
Inc.,  Merit  Medical  Systems  Inc.,   Novametrix  Medical  Systems,   Minntech
Corporation,  Utah Medical  Products,  Inc.,  Vital Signs Inc., and Zoll Medical
Corporation.  The  financial  data and ratios  compared as part of this analysis
included the stock price as a percentage  of the 52-week  high;  the multiple of

<PAGE>

company  value  (market  capitalization  plus debt less  cash) to  revenue;  the
multiple of company value to earnings before  interest and taxes  ("EBIT");  the
multiple of market price to  latest-12-month  ("LTM")  earnings  per share;  the
multiple of market price to estimated  1998 earnings per share;  the multiple of
market price to estimated  1999  earnings per share;  sales (LTM);  gross margin
(LTM); operating margin (LTM); net margin (LTM); and one-year historical revenue
growth.

         This analysis  showed that this group of medical  technology  companies
had a stock price as a  percentage  of the 52-week  high  ranging  from 67.8% to
89.6%, with a mean of 81.5% and a median of 85.7%,  compared to 86.4% for AVECOR
based on a merger  value of $11.125 per share;  a multiple  of company  value to
revenue  ranging  from  0.7 to  7.1,  with a mean of 2.4  and a  median  of 2.0,
compared  with 1.9 for AVECOR  based on a merger  value of $11.125 per share;  a
multiple of company value to EBIT ranging from 7.6 to 21.0,  with a mean of 13.5
and a median of 12.6,  compared  with 49.8 for AVECOR based on a merger value of
$11.125 per share;  a multiple of market price to LTM earnings per share ranging
from 13.7 to 58.0, with a mean of 28.0 and a median of 19.2,  compared with 74.2
for AVECOR  based on a merger  value of $11.125 per share;  a multiple of market
price to estimated  1998  earnings per share  ranging from 12.1 to 50.0,  with a
mean of 22.9 and a median  of 20.8,  compared  with 44.5 for  AVECOR  based on a
merger value of $11.125 per share;  a multiple of market price to estimated 1999
earnings per share  ranging from 10.4 to 44.1,  with a mean of 18.4 and a median
of 15.0,  compared  with 30.9 for AVECOR  based on a merger value of $11.125 per
share;  LTM sales ranging from $15.3 million to $285.8  million,  with a mean of
$77.6  million and a median of $54.1  million,  compared  with $47.3 million for
AVECOR; gross margin (LTM) ranging from 35.4% to 58.1%, with a mean of 48.6% and
a median of 50.3%,  compared  with  40.8% for  AVECOR;  operating  margin  (LTM)
ranging from 4.6% to 24.9%, with a mean of 12.8% and a median of 10.8%, compared
with 3.7% for AVECOR;  net margin (LTM) ranging from 1.6% to 17.9%,  with a mean
of 9.8% and a median  of 9.2%,  compared  with  2.5% for  AVECOR;  and  one-year
historical  revenue growth ranging from -34.2% to 28.7%, with a mean of 8.1% and
a median of 11.9%, compared with 6.5% for AVECOR.

Comparable Transaction Analysis

         Piper Jaffray reviewed and analyzed certain financial data from a group
of 21 selected change-in-control transactions in the medical technology industry
announced or completed  between  January 1, 1995,  and July 9, 1998,  and deemed
comparable to the Merger.  For these  transactions,  Piper Jaffray  analyzed the
ratio of target company value to target company LTM sales;  target company value
to LTM earnings before  interest and taxes ("EBIT");  and target equity value to
LTM net income. For these  transactions,  this analysis showed that the ratio of
target  company value to target company LTM sales ranged from 1.0 to 5.5, with a
mean of 2.7 and median of 2.5,  compared with a multiple of 1.9 for AVECOR based
on a merger value of $11.125 per share; the ratio of target company value to LTM
EBIT  ranged  from  10.7 to  34.0,  with a mean of 20.7  and a  median  of 18.9,
compared  with a multiple of 49.8 for AVECOR  based on a merger value of $11.125
per share;  and the ratio of target  equity value to LTM net income  ranged from
13.7 to 72.5, with a mean of 35.1 and a median of 32.0, compared with a multiple
of 74.2 for AVECOR based on a merger value of $11.125 per share.

Premiums Paid Analysis

         Piper  Jaffray also  reviewed and analyzed the premiums  paid in recent
acquisitions  of a group of publicly held companies.  The analysis  examined the
ratio  between the  proposed  acquisition  offer price and the target  company's
price  per  share at  various  times  prior to the  announcement  of a  possible
transaction.   In  selecting  comparable  transactions  for  the  premiums  paid
analysis,  Piper Jaffray only included medical technology businesses involved in
change-in-control  transactions completed or pending since January 1, 1995. This

<PAGE>

analysis  revealed 40  transactions  that Piper Jaffray deemed to be comparable.
For these  transactions,  the implied  premiums paid,  based on the target share
price four weeks prior to the  announcement of a possible  transaction  compared
with the proposed  acquisition  offer price,  ranged from -9.3% to 93.1%, with a
mean of 36.1% and a median of 33.2%,  compared  with a premium  of 74.4% for the
Merger.  The implied  premiums paid, based on the target company share price one
week prior to announcement  compared with the proposed  acquisition offer price,
ranged  from  -11.8%  to  60.9%,  with a mean of 27.4%  and a median  of  25.8%,
compared  with a premium of 50.7% for AVECOR  based on a merger value of $11.125
per share.

Discounted Cash Flow Analysis

         Using a discounted cash flow analysis, Piper Jaffray calculated a range
of  theoretical  per share values for AVECOR,  based on the net present value of
implied  future cash flows of AVECOR from 1998 to 2001 and a terminal value from
a multiple of operating  income in 2001.  Piper Jaffray used internal  financial
planning  data  prepared  by  management  of AVECOR for 1998  through  2001 that
reflect AVECOR as a stand-alone  entity.  Piper Jaffray  calculated the range of
net present  values for AVECOR based on a range of discount  rates of 20% to 25%
and a range of terminal  value  multiples  of  forecasted  2001 EBIT of 11.0x to
15.0x.  This analysis yielded a range of estimated  present values for AVECOR of
between  $5.86 per share and $8.86 per share,  compared  with a merger  value of
$11.125 per share.

Analysis of Medtronic Common Stock

         Piper  Jaffray  reviewed  general  background   information  concerning
Medtronic.  Piper Jaffray reviewed certain publicly  available analyst estimates
and ratings of Medtronic  Common Stock,  the annual returns of Medtronic  Common
Stock over  various  periods,  the  relative  price  performance  to the S&P 500
Composite  Index  over the last  five  years and the stock  price  over  several
periods in the last year. In addition, Piper Jaffray compared selected financial
data and ratios for Medtronic to the  corresponding  data and ratios for a group
of companies  deemed  comparable to Medtronic,  all of which are publicly traded
medical  technology  companies.  The comparable  company group  consisted of the
following five companies:  Arterial Vascular Engineering Inc., Boston Scientific
Corporation,   Guidant  Corporation,   Sofamor/Danek  Group  Inc.,  and  Stryker
Corporation.  The  financial  data and ratios  compared as part of this analysis
included the stock price as a percentage  of the 52-week  high;  the multiple of
company value to revenue; the multiple of company value to EBIT; the multiple of
market  price to LTM  earnings  per  share;  the  multiple  of  market  price to
estimated  1998  earnings  per share;  the multiple of market price to estimated
1999 earnings per share; LTM sales; gross margin (LTM);  operating margin (LTM);
net margin (LTM); and one-year historical revenue growth.

         This analysis  showed that this group of medical  technology  companies
had a stock price as a  percentage  of the 52-week  high  ranging  from 86.3% to
98.7%,  with a mean of 94.0%  and a  median  of  95.2%,  compared  to 97.3%  for
Medtronic; a multiple of company value to revenue ranging from 3.8 to 11.3, with
a mean of 7.6 and a median of 7.8, compared with 12.1 for Medtronic;  a multiple
of company  value to EBIT ranging  from 19.9 to 56.8,  with a mean of 32.7 and a
median of 28.0, compared with 35.2 for Medtronic;  a multiple of market price to
LTM  earnings  per share  ranging  from 31.4 to 98.3,  with a mean of 55.0 and a
median of 41.4, compared with 54.0 for Medtronic;  a multiple of market price to
estimated 1998 earnings per share ranging from 16.6 to 39.3, with a mean of 30.6
and a median of 34.4,  compared  with 47.5 for  Medtronic;  a multiple of market
price to estimated  1999  earnings per share  ranging from 20.8 to 30.6,  with a
mean of 26.6 and a median of 28.4, compared with 39.2 for Medtronic.

         Although  the summary set forth above does not purport to be a complete
description of the analyses  performed by Piper Jaffray,  the material  analyses
performed by Piper  Jaffray in rendering its opinion have been  summarized.  The

<PAGE>

preparation  of a fairness  opinion is not  necessarily  susceptible  to partial
analysis or summary  description.  Piper Jaffray  believes that its analyses and
the  summary set forth above must be  considered  as a whole and that  selecting
portions of its analyses, without considering all analyses, or selecting part or
all of the above summary,  without  considering all factors and analyses,  would
create an incomplete view of the processes  underlying the analyses set forth in
the Piper  Jaffray  Opinion.  In addition,  Piper Jaffray may have given various
analyses  more or less weight  than other  analyses  but no  analysis  was given
materially  more  weight  than any other  analysis.  The fact that any  specific
analysis has been referred to in the summary above is not meant to indicate that
such analysis was given greater weight than any other analysis.

         The analyses performed by Piper Jaffray are not necessarily  indicative
of actual values or actual future results,  which may be  significantly  more or
less  favorable  than  suggested by such  analyses.  Such analyses were prepared
solely as part of Piper Jaffray's  analysis of the fairness of the consideration
to be paid in connection with the Merger to AVECOR shareholders. The analyses do
not  purport to be  appraisals  or to reflect the prices at which  AVECOR  might
actually be sold or the prices at which any  securities may trade at the present
time or at any time in the future.

         Piper Jaffray was selected by AVECOR on the basis of its  experience in
connection  with mergers and  acquisitions  and its  knowledge of AVECOR.  Piper
Jaffray is a  nationally  recognized  investment  banking  firm and is regularly
engaged in the valuation of businesses and their  securities in connection  with
mergers  and  acquisitions,   underwritings   and  secondary   distributions  of
securities,  private placements, and valuations for estate, corporate, and other
purposes.  Piper Jaffray has acted as exclusive  financial  advisor to AVECOR in
connection with the Merger and will receive a fee of approximately  $950,000 for
its services, which is contingent upon consummation of the Merger. Piper Jaffray
will  receive a separate fee of $250,000  for  providing  its opinion to AVECOR,
which will be credited against the fee for its services. This opinion fee is not
contingent  upon the  consummation  of the  Merger.  AVECOR  has also  agreed to
indemnify  Piper Jaffray  against  certain  liabilities  in connection  with the
provision of these  services.  Piper  Jaffray  acted as lead manager of a public
stock offering of AVECOR Common Stock on June 21, 1995 and provides  research on
AVECOR. In the ordinary course of business, Piper Jaffray and its affiliates may
actively trade  securities of Medtronic and AVECOR for their own accounts or the
accounts  of their  customers  and  accordingly,  may at any time hold a long or
short position in such securities.

Vote Required

         Approval of the Merger requires the affirmative  vote of the holders of
a majority of the  outstanding  shares of AVECOR  Common  Stock.  Each holder of
AVECOR  Common Stock  outstanding  as of the Record Date is entitled to one vote
for each share held. On the Record Date, there were [8,044,475] shares of AVECOR
Common Stock  outstanding.  Of such shares,  [1,080,749]  shares  (approximately
[13.4]% of the outstanding shares of AVECOR Common Stock) are beneficially owned
by directors and executive officers of AVECOR.  AVECOR's directors and executive
officers have executed voting agreements under which such persons have agreed to
vote shares of AVECOR  Common  Stock  owned by them in favor of the Merger.  See
"The  Merger--Voting  Agreements."  In addition,  of the shares of AVECOR Common
Stock  outstanding  as of the Record Date,  Medtronic,  through a wholly-  owned
subsidiary,  owns  346,960  shares  of  AVECOR  Common  Stock,  which  represent
approximately  4.3% of the shares  outstanding  and  entitled  to vote as of the
Record  Date.  Medtronic  intends to have all such shares  voted in favor of the
Merger.


<PAGE>

         Medtronic,  as the sole shareholder of Merger Subsidiary,  has approved
the Plan of Merger and the Merger Agreement.  Approval of the Plan of Merger and
the Merger Agreement by Medtronic's shareholders is not required under Minnesota
law and is not being sought.

Conversion of AVECOR Common Stock in the Merger

         At the Effective Time of the Merger,  each issued and outstanding share
of AVECOR Common Stock,  except shares of AVECOR Common Stock owned by Medtronic
and any shares of AVECOR Common Stock held by holders who have  perfected  their
dissenters' rights under the MBCA (see "The  Merger--Rights of Dissenting AVECOR
Shareholders"),  will be  automatically  converted into the right to receive the
portion of a share (the  "Conversion  Fraction") of Medtronic Common Stock equal
to $11.125  divided by the average of the daily closing sale prices of Medtronic
Common Stock as reported on the NYSE  Composite Tape (the "Average Stock Price")
for the 18 consecutive trading days ending on the second trading day immediately
preceding the Effective Time.

         The $11.125 amount per share of AVECOR Common Stock,  payable in shares
of Medtronic Common Stock as described above,  shall be reduced  proportionately
if the sum of the number of shares of AVECOR  Common  Stock  outstanding  at the
Effective  Time plus the number of shares subject to then  outstanding  options,
warrants,   or  other   rights  to  acquire   shares  of  AVECOR   Common  Stock
(collectively,  "Stock  Rights") at the Effective  Time exceeds  8,879,725  (the
number of AVECOR shares, and options to purchase such shares, outstanding on the
date the  Merger  Agreement  was  signed)  plus the  number of  shares  issuable
pursuant  to the  offering  period  in  process  as of the  date  of the  Merger
Agreement  under  AVECOR's  Employee  Stock  Purchase  Plan, or if the aggregate
exercise  price of all Stock Rights then  outstanding is less than the aggregate
exercise  price  reflected in the Merger  Agreement.  AVECOR does not anticipate
that any such adjustment will be required.

         If, prior to the Effective Time,  Medtronic  recapitalizes,  splits, or
combines  the  Medtronic  Common  Stock or pays a stock  dividend or other stock
distribution in shares of Medtronic Common Stock,  then the Conversion  Fraction
will be appropriately adjusted.

         Based on the number of shares of AVECOR Common Stock outstanding on the
Record Date (assuming a Conversion  Fraction of [.1922],  or one Medtronic share
for every  [5.2]  AVECOR  shares,  calculated  by using the  [August  24],  1998
Medtronic  closing sale price of $[57.875]  as the assumed  Average  Stock Price
solely for illustrative  purposes of this paragraph),  an estimated  [1,546,150]
shares of Medtronic  Common  Stock will be issued in exchange for AVECOR  Common
Stock upon consummation of the Merger.  Such shares would represent less than 1%
of the  shares  of  Medtronic  Common  Stock  that  would be  outstanding  after
consummation of the Merger.

         Medtronic  intends to  purchase,  on the open  market,  a number of its
shares  equivalent  to the  number  of  shares  to be  issued as a result of the
Merger.

         AVECOR  shareholders  should  understand  that  shareholders  receiving
Medtronic  Common Stock in the Merger will receive a number of Medtronic  shares
determined pursuant to the Conversion  Fraction,  as defined at the beginning of
this section.  Because the market price of Medtronic  Common Stock is subject to
fluctuation,  the market value of the Medtronic shares that AVECOR  shareholders
receive in the Merger  (whether  measured at the Effective Time of the Merger or
another  date) may be less than or greater than the Average Stock Price used for
purposes of determining the Conversion  Fraction.  In addition,  because of such
fluctuations in the value of Medtronic shares, the market value of the Medtronic
Common  Stock that  AVECOR  shareholders  receive in the Merger may  increase or
decrease  following the Merger. See "Comparative Stock Prices and Dividends" for
information regarding the historical market prices of Medtronic Common Stock.


<PAGE>

         Fractional Shares

         No certificates or scrip  representing  fractional  shares of Medtronic
Common Stock will be issued, and no Medtronic dividend, stock split, or interest
will relate to any fractional  share. No fractional share interests will entitle
the owner  thereof to vote or to any rights of a shareholder  of Medtronic.  All
fractional  shares of Medtronic  Common Stock to which a holder of AVECOR Common
Stock  immediately  prior to the Effective Time would otherwise be entitled,  at
the Effective  Time,  shall be aggregated if and to the extent  multiple  AVECOR
stock  certificates  of such  holder are  submitted  together  to  Norwest  Bank
Minnesota,  N.A., the exchange agent for the Merger (the "Exchange Agent"). If a
fractional  share  results  from  such  aggregation,  then,  in lieu of any such
fractional  share,  each holder of AVECOR  Common Stock who  otherwise  would be
entitled to receive a fractional  share of Medtronic  Common Stock in the Merger
will receive an amount of cash (without interest)  determined by multiplying (i)
the  Average  Stock Price by (ii) the  fractional  share  interest of  Medtronic
Common Stock to which such holder would otherwise be entitled.

         Exchange of Shares of AVECOR Common Stock

         As soon as  practicable  after the Effective  Time,  the Exchange Agent
will mail a letter of transmittal  to holders of a certificate  or  certificates
that prior to the Effective Time represented outstanding shares of AVECOR Common
Stock.  The  letter of  transmittal  will  include  instructions  regarding  the
surrender of certificates representing shares of AVECOR Common Stock in exchange
for certificates representing shares of Medtronic Common Stock.

         As soon as  practicable  after the Effective  Time,  the Exchange Agent
will  distribute to holders of shares of AVECOR Common Stock,  upon surrender to
the Exchange Agent of one or more  certificates for such shares of AVECOR Common
Stock for cancellation, together with a duly-executed letter of transmittal, (i)
one or more  certificates  representing  the number of whole shares of Medtronic
Common Stock into which the shares represented by the  certificate(s)  have been
converted  and (ii) a check  in the  amount  of any  cash in lieu of  fractional
shares.  Holders of AVECOR Common Stock will not be entitled to receive interest
on any cash to be received in the Merger.

         After the Effective Time,  certificates  representing  shares of AVECOR
Common Stock converted into Medtronic  Common Stock in the Merger will be deemed
for all purposes to evidence  ownership of the shares of Medtronic  Common Stock
into which they were converted.  Holders of AVECOR Common Stock will be entitled
to any  dividends  that  become  payable to persons who are holders of record of
Medtronic  Common Stock as of a record date on or after the Effective  Time, but
only after  they have  surrendered  their  certificates  representing  shares of
AVECOR Common Stock for exchange.  Any such  dividends  will be remitted to each
AVECOR  shareholder  entitled thereto,  without interest,  at the time that such
certificates  representing  shares of AVECOR  Common Stock are  surrendered  for
exchange, subject to any applicable abandoned property, escheat, or similar law.
Holders of AVECOR Common Stock will not be entitled,  however, to dividends that
become payable before or after the Effective Time to persons who were holders of
record of  Medtronic  Common  Stock as of a record  date prior to the  Effective
Time.


<PAGE>

Shareholder Rights Plans

         Medtronic  will not become an Acquiring  Person and the Merger will not
cause a Distribution Date under AVECOR's Rights Agreement,  as amended,  as such
terms are  defined  therein.  Further,  pursuant to an  amendment  to the AVECOR
Rights Agreement  adopted on August 21, 1998,  Medtronic will not be declared an
Adverse  Person  under  the  AVECOR  Rights  Agreement  because  of  Medtronic's
beneficial  ownership  of AVECOR  Common Stock  resulting  from the Stock Option
Agreement and the voting agreements  entered into with officers and directors of
AVECOR.

         Under the terms of the AVECOR Rights Agreement, each outstanding AVECOR
Right (as defined  therein) will expire  automatically  pursuant to the terms of
the AVECOR  Rights  Agreement  upon  consummation  of the Merger and without any
action on the part of AVECOR shareholders.  No additional  consideration will be
paid to AVECOR  shareholders  in  connection  with the  expiration of the AVECOR
Rights as a result of the Merger.

         Each AVECOR shareholder  entitled to receive shares of Medtronic Common
Stock in  connection  with the Merger or upon  exercise of AVECOR  options  will
receive,  together  with each share of Medtronic  Common  Stock,  one  Medtronic
Preferred  Stock  Purchase Right  pursuant to the Medtronic  Shareholder  Rights
Plan, represented by the certificate  representing the share of Medtronic Common
Stock. See "Comparative Rights of Medtronic and AVECOR Shareholders--Shareholder
Rights Plans."

Treatment of Stock Options

         Under the terms of the outstanding options to purchase shares of AVECOR
Common Stock, any such options not otherwise vested will become fully vested and
exercisable  at the Effective  Time as a result of the Merger.  All such options
that are not exercised  and remain  outstanding  at the  Effective  Time will be
assumed by Medtronic and, following the Effective Time, will be exercisable upon
the same terms and  conditions  as such  options were  exercisable  prior to the
Merger,  except that the  exercise  price and the number of shares of  Medtronic
Common Stock that can be purchased  upon exercise of the options will be revised
to  reflect  conversion  of the  options  on the same  basis as shares of AVECOR
Common Stock are converted into shares of Medtronic  Common Stock in the Merger.
As promptly as practicable  after the Effective Time,  Medtronic will provide to
each holder of an AVECOR option a written statement informing such holder of the
assumption by Medtronic of such option.

Conduct of Business of AVECOR Pending the Merger

         AVECOR has agreed that,  prior to  consummation  of the Merger,  unless
Medtronic  agrees  otherwise,  it will conduct its business only in the ordinary
course,  it will use all  reasonable  efforts to  preserve  intact its  business
organization and relationships  with third parties,  and it will not: declare or
pay any  dividends or other  distributions;  amend or alter any material term of
its securities;  incur,  assume or guarantee any indebtedness  other than in the
ordinary course of business;  create,  assume, or incur any lien on any material
asset;  issue or repurchase any  securities  (other than issuances of securities
upon the exercise of stock options and other rights previously  granted);  alter
its accounting  principles;  increase the compensation or benefits of any of its
directors,  officers, or other employees (except under existing agreements or in
the ordinary course of business); amend its Articles of Incorporation or Bylaws;
sell any  property,  pay any  liabilities,  or waive any  claims,  except in the
ordinary  course of business;  make capital  investments  in any other  company;
purchase fixed assets exceeding a specified aggregate purchase price; distribute
mass  communications to any group without allowing Medtronic to comment on them;

<PAGE>

merge or  consolidate  with any  person;  acquire  the  stock or  assets  of any
business;  take or fail to take any action that would cause its  representations
and warranties in the Merger Agreement to be inaccurate;  enter into or make any
material  change in any material  agreements,  except in the ordinary course and
consistent  with past practice;  institute,  settle,  or compromise any claim or
suit  involving  amounts in excess of a  specified  amount;  knowingly  take any
action  that  would  jeopardize  the  treatment  of  the  Merger  as a  tax-free
transaction; or agree or commit to do any of the foregoing.

         AVECOR has agreed that (except as is required by the  fiduciary  duties
of AVECOR's directors and officers as so advised by independent counsel) neither
AVECOR  nor  any  of  its   representatives  or  affiliates  will,  directly  or
indirectly,  solicit, initiate, or encourage any alternative proposal, or engage
in any negotiations with, or provide any information to, any person,  entity, or
group (other than Medtronic)  that has made or may make an alternative  proposal
with  respect to AVECOR or any  subsidiary  (except  that  AVECOR may inform any
third  party  who  contacts  AVECOR  on  an  unsolicited  basis  concerning  any
alternative  proposal  that AVECOR is  obligated  under the Merger  Agreement to
disclose such  solicitation to Medtronic).  For these purposes,  an "alternative
proposal" would include a proposal involving a merger or consolidation,  a sale,
lease,  or  licensing  of any  significant  portion of the assets,  or a sale of
shares of capital stock of AVECOR or any  subsidiary.  AVECOR has agreed that it
will notify Medtronic promptly,  and prior to furnishing information or entering
into discussions or negotiations with a third party,  regarding the terms of any
such proposal that AVECOR may receive.

         Pursuant  to  the  Merger  Agreement  and a  confidentiality  agreement
between  Medtronic  and  AVECOR,  AVECOR  has agreed to give  Medtronic  and its
representatives access to AVECOR's offices, properties,  books, and records, and
to furnish to Medtronic  and its  representatives  such  financial and operating
data and other  information as Medtronic may reasonably  request,  and will have
its  employees  and  representatives  cooperate  with  Medtronic in  Medtronic's
investigation of the business of AVECOR.

Interests of Certain Persons in the Merger

         In considering the  recommendation  of the Board of Directors of AVECOR
with respect to the Plan of Merger,  the Merger Agreement,  and the transactions
contemplated  thereby,  shareholders  of  AVECOR  should be aware  that  certain
members  of the  management  and  Board of  Directors  of  AVECOR  have  certain
interests  in the Merger that are in addition  to, and may be in conflict  with,
the interests of shareholders of AVECOR generally.

         Stock Options.  Under the terms of the outstanding  options to purchase
shares of AVECOR  Common Stock,  any such options that are not otherwise  vested
will become fully vested and  exercisable  at the Effective  Time as a result of
the  Merger.   AVECOR's  executive  officers  and  directors  collectively  hold
outstanding  options to purchase 407,000 shares of AVECOR Common Stock, of which
options to purchase  an  aggregate  297,750  shares will vest as a result of the
Merger. The following executive officers and directors hold the following number
of options that will become vested as a result of the Merger:  Anthony Badolato,
50,000;  Gregory Melsen,  86,250; Allan Seck, 30,000;  William Haworth,  76,000;
Edward Strickland, 18,500; David Stassen, 18,500; and Gordon Wright, 18,500. See
"--Treatment of Stock Options."

         Noncompetition Agreements. Simultaneously with or immediately following
the  execution  of the Merger  Agreement,  Messrs.  Badolato  and Seck  executed
separate  noncompetition  agreements  with  Medtronic.  AVECOR,  pursuant to the
Merger  Agreement,  has agreed to use all  reasonable  efforts to cause  Messrs.
Melsen,  Haworth  and  Bradley  Goskowicz  to  execute  proposed  noncompetition
agreements  with  Medtronic.  Each of the executed  and proposed  noncompetition

<PAGE>

agreements  is  expressly  contingent  upon  the  effectiveness  of the  Merger.
Pursuant  to these  noncompetition  agreements,  the  individual  executing  the
agreement agrees that such individual will not be employed by,  associated with,
or render  services  to any  person  or entity  (other  than  AVECOR or  another
Medtronic affiliate) engaged in the design, development, manufacture, marketing,
or sale of products  that are  similar to current or planned  products of AVECOR
anywhere  in the  world.  The  noncompetition  agreements  executed  by  Messrs.
Badolato  and Seck  expire 42 months  after the  Effective  Time,  and the other
noncompetition  agreements  will expire 24 months after the  Effective  Time, if
executed as proposed.

         Change in Control  Agreements.  On April 29, 1996,  AVECOR entered into
change in control  agreements with four executive  officers  (Messrs.  Badolato,
Melsen,  Seck, and Haworth) and other employees.  The agreements provide certain
payments  and  benefits  to these  individuals  in the event  that,  during  the
12-month period following a "change in control" of AVECOR, (i) such individual's
employment is terminated by AVECOR or its  successors  for any reason other than
for death, disability, retirement, or "cause" or (ii) such individual terminates
his  employment  for "good reason,"  which  includes  certain  material  adverse
changes in the executive's  status,  position,  base salary,  benefits,  or work
location.  The executive  will be paid,  in that event,  a lump sum cash payment
equal to 24 times the executive's highest monthly  compensation for any 12-month
period  during  the  prior 36  months.  The  terminated  executive  will also be
entitled to continue to receive  coverage  under  AVECOR's  benefit plans for 24
months.  Consummation  of the Merger will constitute the occurrence of a "change
in control" under the change in control agreements.

         Indemnification. Medtronic has agreed to provide to the individuals who
have served as officers and  directors  of AVECOR,  for at least six years after
the  Merger  (or  until  any  matters  arising  prior to the  Merger  have  been
resolved),  indemnification  equivalent to that provided by the Second  Restated
Articles  of  Incorporation,  as  amended,  and  Bylaws of  AVECOR  prior to the
Effective Time. Medtronic has also agreed to provide,  for six years,  officers'
and  directors'  liability  insurance  coverage  comparable  to  that  currently
provided by AVECOR with respect to acts occurring  prior to the Effective  Time.
See "--Indemnification."

         Each of Messrs. Badolato, Strickland,  Stassen, and Wright participated
in the  discussions  and  deliberations  of the  AVECOR  Board of  Directors  in
connection  with  the  Merger,  and each of them  voted in favor of the  Merger.
Messrs.  Melsen,  Seck, and Haworth participated in such discussions but are not
Board members.

Voting Agreements

         Pursuant to agreements to facilitate  merger between Medtronic and each
of the  executive  officers and  directors of AVECOR  (Messrs.  Badolato,  Seck,
Melsen, Haworth, Strickland,  Stassen, and Wright), such individuals have agreed
to vote shares of AVECOR Common Stock owned by them as of the date of the Merger
Agreement (i) in favor of the approval,  consent, and ratification of the Merger
and (ii) against any action that would impede, interfere with, or discourage the
Merger,  would  facilitate  an  acquisition  of AVECOR in any  manner by a party
(other than  Medtronic),  or would  result in any breach of any  representation,
warranty,  covenant,  or agreement of AVECOR under the Merger  Agreement.  These
voting  agreements  terminate  upon  termination  of  the  Merger  Agreement  by
Medtronic.  As of the Record  Date,  the  shareholders  who  executed the voting
agreements  owned an  aggregate  [1,080,749]  shares  of  AVECOR  Common  Stock,
representing approximately [13.4]% of the AVECOR Common Stock outstanding on the
Record Date.


<PAGE>

Stock Option Agreement

         Simultaneously  with the execution of the Merger Agreement,  AVECOR and
Medtronic entered into a Stock Option Agreement pursuant to which AVECOR granted
to Medtronic an option,  exercisable only under certain specified circumstances,
to  purchase a number of shares of AVECOR  Common  Stock  equal to an  aggregate
19.9% of the shares of AVECOR Common Stock outstanding on the date of the Merger
Agreement,  or 1,600,851 such shares, at an exercise price of $11.125 per share.
The specified circumstances under which the stock option becomes exercisable are
the same as those that could  result in the  payment by AVECOR of a  termination
fee upon certain events triggering termination of the Merger Agreement. See "The
Merger--Amendment and Termination of the Merger Agreement."

         Under the Stock Option Agreement,  Medtronic also has the right,  under
certain  circumstances  following the occurrence of specified proposals by third
parties to acquire stock or assets of AVECOR or to merge or combine with AVECOR,
and in lieu of  exercising  Medtronic's  option,  to  require  AVECOR  to pay to
Medtronic, in cancellation of Medtronic's option, the in-the-money value of such
option.  Such value is calculated as the lesser of (i) $2.75 million or (ii) the
number of shares subject to Medtronic's  option  multiplied by the excess of the
then-current trading price of AVECOR Common Stock or the price per share offered
in the third-party  proposal,  whichever is greater,  over $11.125. In no event,
however,  can  the  sum of  such  cancellation  amount  and  the  $2.75  million
termination  fee  under the  Merger  Agreement,  if then  payable,  exceed  $3.6
million. See "--Amendment and Termination of the Merger Agreement."

Conditions; Waiver

         The respective obligations of Medtronic,  Merger Subsidiary, and AVECOR
to effect the Merger are subject to the  satisfaction  at or prior to the Merger
of certain conditions,  including,  among others: (a) the approval by the AVECOR
shareholders of the Merger; (b) the effectiveness of the Registration Statement;
(c) the  expiration  or  termination  of the waiting  periods  applicable to the
consummation  of the Merger under the HSR Act and any foreign  merger laws;  (d)
the shares of  Medtronic  Common Stock  issuable in the Merger  having been duly
authorized for listing by the NYSE, subject to official notice of issuance;  and
(e) the absence of an order, decree, or injunction by any federal or state court
or other governmental body, agency, or official that would prevent or materially
delay consummation of the Merger.

         In addition, the obligations of AVECOR to effect the Merger are subject
to the satisfaction at or prior to the Merger of certain  conditions,  including
that:  (a)  Medtronic  and Merger  Subsidiary  have  performed  in all  material
respects their obligations  under the Merger Agreement  required to be performed
by them;  (b) each  representation  and warranty of  Medtronic  contained in the
Merger Agreement is true in all material  respects as of the Effective Time; and
(c) AVECOR has received an opinion of  Oppenheimer  Wolff & Donnelly LLP, to the
effect that the Merger will constitute a "tax-free"  reorganization  for federal
income tax purposes. See "The Merger--Certain Federal Income Tax Consequences."

         In addition,  the  obligations  of Medtronic  and Merger  Subsidiary to
effect the Merger are subject to the  satisfaction  at or prior to the Merger of
certain  conditions,  including  that:  (a) AVECOR has performed in all material
respects its obligations under the Merger Agreement  required to be performed by
it; (b) each  representation  and  warranty  of AVECOR  contained  in the Merger
Agreement is true in all material  respects as of the  Effective  Time;  (c) all
necessary  consents  have been  received;  (d)  Medtronic  has received  written

<PAGE>

resignations  from  each of the  directors  and  specified  officers  of  AVECOR
specified  by  Medtronic  effective as of the  Effective  Time;  and (e) Anthony
Badolato has agreed to continue his employment with AVECOR following the Merger.

Amendment and Termination of the Merger Agreement

         Any of the provisions of the Merger Agreement may be amended by written
agreement of the respective  parties at any time before or after approval of the
Merger by the AVECOR shareholders;  however,  after such approval,  no amendment
may be made to the Plan of Merger  attached hereto as Appendix A that materially
affects the rights of the AVECOR shareholders without shareholder approval.

         The Merger  Agreement may be terminated and the Merger abandoned at any
time prior to the Effective Time, whether before or after approval of the Merger
by the AVECOR shareholders, only as follows:

                  (a) By mutual  consent  of the Board of  Directors  of each of
         Medtronic and AVECOR;

                  (b) By either  Medtronic  or AVECOR if the Merger has not been
         effected by January 12, 1999,  except that a party cannot terminate the
         Merger  Agreement  if its own  breach of the  Merger  Agreement  is the
         primary cause of, or results in, the Merger not being  effected by such
         date,  and  except  that  such date can be  extended  by 90 days if the
         applicable  governmental   authorities  make  requests  for  additional
         information under the HSR Act or foreign merger laws;

                  (c)  By  either  Medtronic  or  AVECOR  if a  court  or  other
         governmental authority has issued a final, nonappealable order, decree,
         or ruling that permanently enjoins or prohibits the Merger;

                  (d) By either  Medtronic or AVECOR if the AVECOR  shareholders
         do not vote to approve the Merger, except that a party cannot terminate
         the Merger  Agreement  if its own  failure to perform  under the Merger
         Agreement  is the  primary  cause of, or results in, the failure of the
         AVECOR shareholders to approve the Merger;

                  (e) By  Medtronic  if AVECOR has  solicited,  entertained,  or
         negotiated  a competing  offer to acquire  AVECOR in  violation  of the
         Merger  Agreement,  or  recommended,   approved,  or  entered  into  an
         agreement  regarding  any such offer,  or  withdrawn  or modified (in a
         manner adverse to Medtronic) its  recommendation of the Merger, or if a
         tender or exchange  offer for 15% or more of the AVECOR Common Stock is
         commenced  and the AVECOR Board,  within 10 business  days  thereafter,
         fails to recommend  against  acceptance or takes no position  regarding
         acceptance of the offer;

                  (f)  By  AVECOR  if  it is  not  in  material  breach  of  its
         obligations  under the Merger  Agreement and its Board of Directors has
         accepted a competing  offer by a party other than  Medtronic to acquire
         AVECOR, and has paid to Medtronic the termination fee described below;

                  (g) By  Medtronic  if it is not then in  material  breach  and
         there  occurs a material  breach of any  representation,  warranty,  or
         obligation under the Merger  Agreement on the part of AVECOR,  or by an
         affiliate of AVECOR under such person's  affiliate's  letter,  or by an
         officer or director of AVECOR under his voting  agreement,  that cannot
         be cured within 30 days; or


<PAGE>

                  (h) By AVECOR if it is not then in  material  breach and there
         occurs a material breach of any representation, warranty, or obligation
         under the Merger  Agreement  on the part of  Medtronic  that  cannot be
         cured within 30 days.

         AVECOR  has  agreed to pay  Medtronic  $2.75  million if either (i) the
Merger  Agreement is  terminated  as described in paragraph  (e) or (f) above or
(ii) a third party either makes an alternative proposal to which AVECOR responds
or in fact acquires 15% or more of the outstanding  AVECOR Common Stock prior to
the Meeting, and either (A) the AVECOR shareholders do not approve the Merger or
(B) the Merger  Agreement is terminated  pursuant to either  paragraph (g) above
(where AVECOR's breach is willful and intentional) or paragraph (d) above.

Expenses and Fees

         Whether or not the Merger is consummated,  all  out-of-pocket  expenses
incurred in connection with the Merger  (including but not limited to accounting
and legal fees) and the  transactions  contemplated  thereby will be paid by the
party  incurring such costs and expenses,  except that Medtronic and AVECOR will
share  equally all  expenses  related to printing  and mailing the  Registration
Statement and this Proxy Statement/Prospectus and the filing fees required under
the HSR Act and any foreign merger laws.

Restrictions on Resale of Medtronic Common Stock

         The Medtronic  Common Stock issuable in connection  with the Merger has
been registered under the Securities Act and will be freely  transferable by the
recipients, except that this registration does not cover resales by shareholders
of AVECOR who may be deemed to control or be under common control with AVECOR at
the time of the Meeting ("Affiliates").  Affiliates may not sell their shares of
Medtronic Common Stock acquired in connection with the Merger except pursuant to
an effective  registration  statement  under the  Securities  Act covering  such
shares,  or in  compliance  with Rule 145 under the  Securities  Act or  another
applicable  exemption from the registration  requirements of the Securities Act.
AVECOR has  delivered to Medtronic,  and agreed to update as  necessary,  a list
identifying all persons who, in AVECOR's  opinion,  upon advice of counsel,  are
Affiliates of AVECOR for purposes of Rule 145. AVECOR has delivered to Medtronic
from each person already  identified as an Affiliate,  and has agreed to use all
reasonable  efforts to cause each person who is  subsequently  identified  as an
Affiliate  to  deliver  to  Medtronic  at or prior  to the  Effective  Time,  an
agreement  that such  persons  (i) will not offer to sell,  sell,  or  otherwise
dispose  of any  shares of  Medtronic  Common  Stock  received  in the Merger in
violation of the  Securities  Act,  and (ii) have no present  intention to sell,
transfer,  or otherwise dispose of any of the Medtronic Common Stock received in
the Merger.  It is  expected  that  Affiliates  will be able to sell such shares
without  registration  and in accordance  with the volume,  manner of sale,  and
other applicable limitations of the Securities Act and the rules and regulations
of the Commission thereunder.

         It is  estimated  that  Affiliates  of AVECOR will receive a maximum of
approximately  [285,945] shares of Medtronic  Common Stock upon  consummation of
the Merger  (assuming  full exercise of all  outstanding  AVECOR options held by
such  Affiliates  and  assuming a Conversion  Fraction of [.1922]).  Such shares
would  constitute less than 1% of the total number of shares of Medtronic Common
Stock  anticipated to be outstanding  immediately after the Effective Time after
giving  effect  to  the  shares  issued  pursuant  to  the  Merger.  Solely  for
illustrative  purposes of the foregoing  estimate,  the Conversion  Fraction was
calculated  by using the  [August  24],  1998  Medtronic  closing  sale price of
$[57.875] as the assumed  Average Stock Price.  See "The  Merger--Conversion  of
AVECOR Common Stock in the Merger."


<PAGE>

Deregistration of AVECOR Common Stock

         If the Merger is consummated,  the AVECOR Common Stock will cease to be
quoted on the Nasdaq National Market, and Medtronic will apply to the Commission
for the deregistration of AVECOR Common Stock under the Exchange Act.

Accounting Treatment of the Merger

         Medtronic  intends  to  account  for  the  Merger  as  a  purchase  for
accounting and financial  reporting purposes under generally accepted accounting
principles.  Under the purchase  method,  AVECOR's results of operations will be
included in Medtronic's  consolidated  results of operations  from and after the
Effective  Time. For purposes of preparing  Medtronic's  consolidated  financial
statements,  Medtronic  will  establish  a new  accounting  basis  for  AVECOR's
identifiable  tangible and intangible assets and liabilities based upon the fair
values  thereof,  and record  goodwill for the  difference  between  Medtronic's
purchase price, including the direct costs of acquisition, and the fair value of
AVECOR's  identifiable tangible and intangible net assets. A final determination
of required purchase accounting  adjustments and of the fair value of the assets
and  liabilities  of AVECOR has not yet been  made.  Accordingly,  the  purchase
accounting   adjustments   made  in  connection  with  the  development  of  the
comparative pro forma per share  financial  information  appearing  elsewhere in
this Proxy Statement/Prospectus are preliminary and subject to change. Using the
purchase method to account of the Merger would not materially affect Medtronic's
cash flow or the results of  operations  on a continuing  basis based on current
and anticipated profitability levels.

Certain Federal Income Tax Consequences

         The following is a discussion of certain material United States federal
income tax considerations in connection with the Merger.  This discussion merely
summarizes  certain  principal  United States federal income tax consequences of
the  Merger  and  does  not  purport  to be a  complete  analysis  of all of the
potential tax effects  relevant to the Merger.  In this regard,  this discussion
does not deal with all federal income tax considerations that may be relevant to
certain AVECOR shareholders in light of their particular circumstances,  such as
dealers in securities,  insurance companies,  shareholders who do not hold their
AVECOR Common Stock as capital assets, foreign persons,  tax-exempt entities, or
persons who are subject to the  alternative  minimum tax provisions of the Code.
Furthermore, it does not address (i) the tax consequences to AVECOR shareholders
who acquired  their shares in connection  with stock  options or stock  purchase
plans or in other compensatory transactions, or (ii) the acceleration of vesting
periods and/or assumption by Medtronic of outstanding options to purchase shares
of AVECOR Common Stock  pursuant to the Merger.  See "The  Merger--Treatment  of
Stock Options," and "--Interests of Certain Persons in the Merger." Moreover, it
does not address the tax  consequences  of the Merger under foreign,  state,  or
local tax laws.

         AVECOR  shareholders  are urged to consult their own tax advisors as to
the consequences of the Merger,  including the applicable federal, state, local,
and foreign tax consequences to them.

         Oppenheimer  Wolff & Donnelly  LLP,  counsel to AVECOR,  will render at
closing  an  opinion  (the  "Tax  Opinion")   that  the  Merger   constitutes  a
reorganization  under Section 368 of the Code. Neither AVECOR nor Medtronic will
request a ruling from the  Internal  Revenue  Service (the "IRS") with regard to

<PAGE>

any of the United States federal income tax consequences of the Merger.  The Tax
Opinion is based on and subject to certain  assumptions  and limitations as well
as factual  representations  received  from AVECOR and  Medtronic,  as discussed
below.  An opinion of counsel  represents only counsel's best legal judgment and
has no binding  effect or official  status of any kind,  and no assurance can be
given that contrary positions may not be taken by the IRS or a court considering
the issues.

         Subject  to  the  accuracy  of  representations  contained  in  certain
certificates  received  from  AVECOR  and  Medtronic,   it  is  the  opinion  of
Oppenheimer  Wolff & Donnelly LLP that the material United States federal income
tax consequences of the Merger are as follows:

         Nature of the Merger.  The Merger will constitute a  reorganization  as
defined  in  Section   368(a)(1)(A)  of  the  Code  by  application  of  Section
368(a)(2)(E) of the Code, and AVECOR, Medtronic, and Merger Subsidiary will each
be "a party to a  reorganization"  within the  meaning of Section  368(b) of the
Code if the  Merger  is  carried  out in the  manner  set  forth  in the  Merger
Agreement.

         Consequences  to AVECOR.  AVECOR will not  recognize  gain or loss upon
Medtronic's issuance of Medtronic Common Stock to the AVECOR shareholders in the
Merger and the transfer by operation  of law of Merger  Subsidiary's  assets and
liabilities to AVECOR upon consummation of the Merger.

         Consequences  to  AVECOR's  Shareholders.  No  gain  or  loss  will  be
recognized  by  AVECOR's  shareholders  upon  their  receipt  in the  Merger  of
Medtronic  Common  Stock,  except to the  extent of cash  received  in lieu of a
fractional share of Medtronic Common Stock.

         The aggregate tax basis of Medtronic Common Stock received by an AVECOR
shareholder in the Merger  (including any fractional share deemed received) will
be the same as the aggregate tax basis of the AVECOR Common Stock surrendered in
exchange therefor.

         The holding period of each share of Medtronic  Common Stock received by
each of AVECOR's shareholders in the Merger will include the period during which
such AVECOR  shareholder  held his or her AVECOR  Common  Stock  surrendered  in
exchange  therefor,  provided  that the AVECOR Common Stock is held as a capital
asset at the time of the Merger.

         Cash  payments in lieu of a fractional  share should be treated as if a
fractional  share of  Medtronic  Common  Stock had been issued in the Merger and
then redeemed by Medtronic.  An AVECOR  shareholder  receiving  such cash should
generally  recognize  capital  gain or  loss  upon  such  payment  equal  to the
difference  (if any) between the amount of cash received and such  shareholder's
basis in the fractional share that is being treated as redeemed (which will be a
pro rata  portion  of the  shareholder's  basis in the  Medtronic  Common  Stock
received in the Merger (including any fractional share deemed received)).

         An AVECOR  shareholder  who receives  solely cash for his or her AVECOR
Common Stock pursuant to the exercise of dissenters' rights will be obligated to
report (i) either capital gain or loss equal to the difference  between the cash
received by such shareholder and such  shareholder's  basis in his or her AVECOR
Common  Stock,  if the  shareholder  held his or her  AVECOR  Common  Stock as a
capital asset on the date of the Merger,  or (ii) dividend income,  depending on
whether the deemed redemption  resulting from the exercise of dissenters' rights
qualifies  for sale or exchange  treatment  under the tests set forth in Section
302(b) of the Code.  Under those tests,  most AVECOR  shareholders  who exercise
their  dissenters'  rights should receive capital gain or loss treatment (rather

<PAGE>

than dividend treatment),  if the deemed redemption of their AVECOR Common Stock
constitutes a "complete redemption" of their interests in AVECOR (and Medtronic,
after the Merger).  To the extent that persons  related to any such  shareholder
continue to hold stock in Medtronic  after the Merger,  the rules of Section 318
of the Code may require  dividend  treatment  unless  Section 302(c) of the Code
permits those rules to be waived in a particular instance.

         Limitations on Opinion and Discussion.  As noted above, the Tax Opinion
is subject to certain assumptions,  including, but not limited to, the truth and
accuracy of certain  representations made by AVECOR and Medtronic.  Furthermore,
the Tax Opinion will not bind the IRS and the IRS is,  therefore,  not precluded
from  asserting a contrary  position.  The Tax Opinion and this  discussion  are
based on  currently  existing  provisions  of the Code,  existing  and  proposed
Treasury regulations,  and current  administrative  rulings and court decisions.
There can be no assurance that future legislative,  judicial,  or administrative
changes or  interpretations  will not  adversely  affect the accuracy of the Tax
Opinion or of statements and conclusions  set forth herein.  Any such changes or
interpretations  could  be  applied  retroactively  and  could  affect  the  tax
consequences of the Merger.

Indemnification

         Under  the  Merger  Agreement,  Medtronic  has  agreed to  continue  to
indemnify  the present and former  officers and directors of AVECOR for a period
of at least six years  following  the Merger with  respect to acts or  omissions
occurring  prior to the  Effective  Time,  to the extent that they are currently
indemnified  under AVECOR's  Articles of Incorporation and Bylaws as of the date
of the Merger  Agreement.  Medtronic has also agreed to provide  directors'  and
officers' liability insurance coverage,  comparable to that currently maintained
by AVECOR, for six years after the Effective Time. See "The Merger--Interests of
Certain Persons in the Merger."

Regulatory Requirements

         Under the HSR Act,  certain  acquisition  transactions,  including  the
Merger,  cannot be consummated unless certain  information has been furnished to
the Federal Trade  Commission  ("FTC") and the Antitrust  Division of the United
States  Department of Justice and certain waiting period  requirements have been
satisfied.  Medtronic and AVECOR each  furnished  such  information  on July 22,
1998.  Pursuant  to the HSR Act,  the  Merger may not be  consummated  until the
expiration of at least 30 days following the receipt of each filing,  unless the
waiting period is earlier terminated by the FTC and the Antitrust  Division.  On
August  21,  1998,  Medtronic  and  AVECOR  received  a request  for  additional
information  relating to the notifications that they had earlier filed under the
HSR Act.  This request  extends the waiting  period during which the FTC and the
Antitrust  Division can review the Merger. The waiting period will expire on the
20th  day  after  the  companies  substantially  comply  with the  request.  The
companies intend to respond promptly to the request.

         The Antitrust  Division of the United States  Department of Justice and
the  FTC  frequently  scrutinize  the  legality  under  the  antitrust  laws  of
transactions such as the Merger. At any time before or after the consummation of
the Merger,  the Antitrust  Division or the FTC could take such action under the
antitrust  laws as it deems  necessary  or  desirable  in the  public  interest,
including  seeking to enjoin  the  consummation  of the  Merger or  seeking  the
divestiture of substantial  assets of AVECOR or Medtronic.  AVECOR and Medtronic
believe  that the Merger will not violate the  antitrust  laws.  There can be no
assurance, however, that a challenge to the Merger on antitrust grounds will not
be made or, if such a challenge is made, what the results will be.


<PAGE>

         Due to the international scope of Medtronic's and AVECOR's  businesses,
regulatory   filings  may  also  be  required  in  certain  European  and  other
jurisdictions.  Medtronic and AVECOR are in the process of  determining  whether
any such filings  will be  required,  but they do not expect any such filings to
affect the expected timing of the Merger.

         Other  than as  described  herein,  the  Merger  does not  require  the
approval of any federal,  state, or other agency.  See "The  Merger--Conditions;
Waiver."

Rights of Dissenting AVECOR Shareholders

         If the Merger occurs,  AVECOR  shareholders are entitled to dissenters'
rights under Sections  302A.471 and 302A.473 of the MBCA in connection  with the
Merger.  Medtronic  shareholders  are not  entitled  to  dissenters'  rights  in
connection with the Merger.

         The  following  discussion  is not a  complete  statement  of  the  law
pertaining to dissenters' rights under the MBCA and is qualified in its entirety
by  reference  to the full text of Sections  302A.471  and 302A.473 of the MBCA,
copies of which  are  attached  to this to this  Proxy  Statement/Prospectus  as
Appendix C. Any shareholder of AVECOR who wishes to exercise, or to preserve his
or her  right to  exercise,  dissenters'  rights  should  review  the  following
discussion  and  Appendix C  carefully,  because  failure to timely and properly
comply with the  specified  procedures  will  result in the loss of  dissenters'
rights under the MBCA.

         In accordance with Sections  302A.471 and 302A.473 of the MBCA,  AVECOR
shareholders  have the right to dissent with respect to the Merger and,  subject
to  certain  conditions,  to be paid in cash the "fair  value"  of their  AVECOR
shares.  In this  context,  the term "fair  value" means the value of the AVECOR
shares  immediately  before the  Effective  Time of the  Merger.  Under  Section
302A.473,  where a merger  is to be  submitted  for  approval  at a  meeting  of
shareholders,  the corporation must notify each of its shareholders of the right
to dissent,  include in such notice a copy of Sections 302A.471 and 302A.473 and
provide  a brief  description  of the  procedures  to be  followed  under  these
sections.  This  Proxy  Statement/Prospectus  constitutes  such  notice  to  the
shareholders of AVECOR, and the following discussion describes the procedures to
be followed by a dissenting shareholder.

         A  shareholder  of AVECOR  wishing to exercise  the right to demand the
fair value of his or her shares must:

         o Before the vote of  shareholders  is taken at the Meeting,  file with
         AVECOR a written  notice of intent to demand  the fair  value of his or
         her shares  and, in  addition,  he or she must not vote in favor of the
         Merger. Because a proxy that does not contain voting instructions will,
         unless revoked,  be voted FOR approval of the Merger,  a shareholder of
         AVECOR who votes by proxy and who wishes to exercise dissenters' rights
         must (i) vote AGAINST the approval of the Merger,  or (ii) ABSTAIN from
         voting on the  approval  of the  Merger.  A vote  against the Merger in
         person  or by proxy  will not in and of  itself  constitute  a  written
         notice of intent to demand  the fair  value of a  shareholder's  AVECOR
         shares satisfying the requirements of the MBCA.

         o A demand for fair value must be executed by or for the shareholder of
         record as such  shareholder's  name  appears on his or her AVECOR stock
         certificate or certificates.  If the AVECOR stock is owned of record in
         a fiduciary capacity such as by a trustee,  guardian or custodian, such
         demand  must be  executed  by the  fiduciary.  If the stock is owned of
         record by more than one  person,  as in a joint  tenancy  or tenancy in
         common, such demand must be executed by all joint owners. An authorized

<PAGE>

         agent, including an agent for two or more joint owners, may execute the
         demand for a shareholder  of record;  however,  the agent must identify
         the record owner and  expressly  disclose the fact that,  in exercising
         the demand, he or she is acting as agent for the record owner.

         A record owner who holds shares of AVECOR as a nominee for others, such
         as a broker, may demand fair value of the shares held for all, or fewer
         than all of the beneficial  owners of such shares.  In such a case, the
         written  demand  should  set  forth  the  number  of shares to which it
         relates.  When no number of shares is expressly  mentioned,  the demand
         will be presumed to cover all shares standing in the name of the record
         owner. Beneficial owners of AVECOR shares who are not record owners and
         who intend to exercise dissenters' rights should submit to AVECOR at or
         before  the  assertion  of the  rights a written  consent of the record
         owner or  instruct  the  record  owner  to  comply  with the  statutory
         requirements with respect to the exercise of dissenters'  rights before
         the date of the Meeting.

         o AVECOR  shareholders  who have previously filed a notice of intent to
         demand  the fair  value of their  shares and have not voted in favor of
         the Merger may,  after  shareholder  approval  of the Merger,  elect to
         exercise  dissenters'  rights  and  demand  fair  value by  mailing  or
         delivering  their written demand to: Gregory  Melsen,  Chief  Financial
         Officer, AVECOR Cardiovascular Inc., 7611 Northland Drive, Minneapolis,
         Minnesota  55428.  The written demand should specify the  shareholder's
         name and  mailing  address,  the number of shares  owned,  and that the
         shareholder is thereby demanding the fair value of his or her shares.

         o After the Effective Time, AVECOR, as the surviving corporation,  will
         cause to be  mailed to each  shareholder  of  AVECOR  who has  properly
         asserted  dissenters'  rights a notice that contains (i) the address to
         which a demand for payment and stock certificates must be sent in order
         to receive payment and the date by which they must be received;  (ii) a
         form to be used to certify  the date on which the  shareholder,  or the
         beneficial owner on whose behalf the shareholder dissents, acquired his
         or her AVECOR shares or an interest in them and to demand payment;  and
         (iii)  another copy of Sections  302A.471 and 302A.473  together with a
         brief  description of these sections.  To receive the fair value of his
         or her AVECOR shares, a dissenting  shareholder must demand payment and
         deposit his or her  certificates  within 30 days after this notice from
         AVECOR is given to dissenting shareholders.

         o After the Effective Time or after AVECOR  receives a valid demand for
         payment,  whichever  is later,  AVECOR  must  remit to each  dissenting
         shareholder who has complied with the dissenters' rights provisions the
         amount  AVECOR  estimates  to be the  fair  value of the  shares,  plus
         interest,  along with (i) AVECOR's  closing balance sheet and statement
         of income for a fiscal year  ending not more than 16 months  before the
         effective  date of the  Merger,  together  with  the  latest  available
         interim  financial  statement;  (ii) an  estimate by AVECOR of the fair
         value of the shares and a brief description of the method used to reach
         the estimate;  and (iii) another copy of Sections 302A.471 and 302A.473
         and a brief  description  of the  procedure to be followed in demanding
         supplemental  payment.  If AVECOR fails to remit payment within 60 days
         of the  deposit of  certificates,  AVECOR  must  return  all  deposited
         certificates. However, AVECOR may again give notice and require deposit
         at a later time.

         o If a dissenting AVECOR shareholder  believes that the amount remitted
         by  AVECOR  is less  than the  fair  value  of his or her  shares  plus
         interest, such dissenting shareholder may give written notice to AVECOR
         of his or her own  estimate  of the  fair  value  for the  shares  plus

<PAGE>

         interest  and demand a  supplemental  payment for the  difference.  Any
         written  demand for  supplemental  payment  must be made within 30 days
         after AVECOR mailed its original remittance.  Otherwise, a dissenter is
         entitled only to the amount remitted by AVECOR.

         o Within 60 days after  receiving  a demand for  supplemental  payment,
         AVECOR, as the surviving corporation, must either pay the amount of the
         supplemental  payment  demanded  (or agreed to between  the  dissenting
         shareholder  and  AVECOR)  or file a  petition  in the state  courts of
         Minnesota  requesting  that the court  determine  the fair value of the
         shares plus  interest.  Any  petition so filed must name as parties all
         dissenting shareholders who have demanded supplemental payments and who
         have been unable to reach an agreement with AVECOR  concerning the fair
         value of their shares.  If AVECOR files such a petition,  it must serve
         all parties with a summons and a copy of the  petition  under the rules
         of civil procedure.  The court may appoint appraisers,  with such power
         and  authority as the court deems  proper,  to receive  evidence on and
         recommend the amount of fair value of the shares.  The  jurisdiction of
         the court is plenary and exclusive, and the fair value as determined by
         the  court  is  binding  on  all  shareholders,   wherever  located.  A
         dissenting  shareholder,  if successful,  is entitled to a judgment for
         the  amount  in cash by which  the fair  value of his or her  shares as
         determined  by the court  exceeds  the amount  originally  remitted  by
         AVECOR, plus interest.

         Generally, the costs and expenses associated with a court proceeding to
determine  the fair value of the AVECOR  shares will be borne by AVECOR,  as the
surviving corporation,  unless the court finds that a dissenting shareholder has
demanded supplemental payment in a manner that is arbitrary,  vexatious,  or not
in good faith.  Similar  costs and  expenses  may also be assessed in  instances
where AVECOR has failed to comply with the procedures in Section 302A.473 of the
MBCA pertaining to dissenters'  rights  discussed  above.  The court may, in its
discretion,  award  attorneys'  fees  to  an  attorney  representing  dissenting
shareholders out of any amount awarded to such dissenters.

         Failure to follow the steps required by Section  302A.473 for asserting
dissenters'  rights may result in the loss of a  shareholder's  rights to demand
the fair value of his or her AVECOR  shares.  Shareholders  considering  seeking
appraisal  should  realize that the fair value of their  shares,  as  determined
under Section  302A.473 of the MBCA in the manner outlined above,  could be more
than,  the same as, or less than the amount of value of the shares of  Medtronic
Common Stock they would be entitled to receive as a result of the Merger if they
did not seek appraisal of their shares.


                     COMPARATIVE STOCK PRICES AND DIVIDENDS

         Medtronic  Common  Stock is listed  and  traded  on the New York  Stock
Exchange  (symbol:  MDT),  and it is a condition to all parties'  obligations to
consummate the Merger that the Medtronic Common Stock to be issued in the Merger
be  approved  for such  listing.  AVECOR  Common  Stock is traded on the  Nasdaq
National Market (symbol: AVEC).

         The following table sets forth,  for the quarters  indicated,  the high
and low sales  prices per share of  Medtronic  Common  Stock on the NYSE and the
cash dividends paid per share of Medtronic Common Stock. Also set forth, for the
calendar period indicated, are the high and low sales prices per share of AVECOR
Common  Stock as reported by the Nasdaq  National  Market.  The prices set forth
below  for  AVECOR  Common  Stock  exclude   adjustments  for  retail  mark-ups,
mark-downs, or commissions.
<PAGE>
<TABLE>
<CAPTION>

                                                                                                         AVECOR
                                                              Medtronic Common Stock                  Common Stock
                                                High               Low            Dividends       High         Low
<S>                                            <C>                 <C>               <C>          <C>        <C>   
         Calendar 1996
         First Quarter..............           $31.3125            $22.25            $.0325       $17.25     $10.50
         Second Quarter.............           $29.875             $24.375           $.0325       $14.125    $12.00
         Third Quarter..............           $32.4375            $23.50            $.0475       $15.875    $11.625
         Fourth Quarter.............           $34.9375            $30.25            $.0475       $14.875    $10.875
         Calendar 1997
         First Quarter..............           $35.875             $28.8125          $.0475       $13.375    $10.75
         Second Quarter.............           $44.4375            $30.375           $.0475       $12.25     $8.75
         Third Quarter..............           $49.25              $42.50            $.055        $12.375    $9.875
         Fourth Quarter.............           $52.75              $40.5625          $.055        $12.00     $6.00
         Calendar 1998
         First Quarter..............           $58.4375            $45.4375          $.055        $8.00      $5.625
         Second Quarter.............           $66.00              $47.9375          $.055        $7.438     $6.125
         Third Quarter (through
          [August 24])..............           $72.75              $51.1875          $.065        $10.625    $7.25
</TABLE>



         AVECOR  has never  paid cash  dividends.  Under the  Merger  Agreement,
AVECOR has agreed not to pay any  dividends on AVECOR  Common Stock prior to the
Merger.  Medtronic has paid regular quarterly cash dividends on Medtronic Common
Stock since 1978. It is expected  that the Board of Directors of Medtronic  will
continue the practice of declaring cash dividends on a quarterly basis; however,
no  assurance  can be given as to the  amount of future  dividends,  which  will
necessarily be dependent on future earnings, financial requirements of Medtronic
and its subsidiaries, and other factors.

         In the Merger,  shares of AVECOR  Common Stock will be  converted  into
shares of Medtronic Common Stock based on the Conversion Fraction,  which equals
$11.125  divided by the Average Stock Price for the 18 consecutive  NYSE trading
days ending on the second NYSE trading day  immediately  preceding the Effective
Time of the Merger.  On July 10,  1998,  the last trading day  preceding  public
announcement of the Merger,  the reported closing sale price of Medtronic Common
Stock on the NYSE was  $69.8125 per share,  resulting  in an implied  Conversion
Fraction  (if it were  determined  based on the closing  sale price that day) of
0.1594.  On that day, the reported  closing sale price of AVECOR Common Stock on
the Nasdaq  National  Market was $9.875 per share.  On [August  24],  1998,  the
latest   practicable   trading   day  prior  to  the   printing  of  this  Proxy
Statement/Prospectus,  the closing sale price of  Medtronic  Common Stock on the
NYSE was $[57.875] per share, resulting in an implied Conversion Fraction (if it
were  determined  based on the  closing  sale  price that day) of  [.1922].  The
reported closing sale price of AVECOR Common Stock on the Nasdaq National Market
on that day was $[10.0625] per share.  Shareholders  are urged to obtain current
market quotations.

         As of [August 24], 1998, there were approximately  [32,850]  registered
holders of Medtronic Common Stock and approximately  [315] registered holders of
AVECOR Common Stock.



<PAGE>

                               RECENT DEVELOPMENTS

Medtronic Stock Offering

         To be  eligible to use the pooling of  interests  accounting  method to
account   for  its  merger   with   Physio-Control   International   Corporation
("Physio-Control") and future acquisitions,  Medtronic intends to sell in one or
more  transactions up to  approximately  12.5 million shares of Medtronic Common
Stock,  which  approximates that number of shares which are tainted for purposes
of pooling of interests  accounting  and were purchased by Medtronic in the open
market  pursuant  to its share  repurchase  program.  This  offering of stock is
expected to be completed prior to the merger with Physio-Control,  but there can
be no assurance that the offering will be completed  successfully.  Consummation
of the  Merger is not  contingent  upon the  completion  of the  above-described
offering of Medtronic Common Stock.

Physio-Control International Corporation

         On June 27,  1998,  Medtronic  entered  into an  agreement  to  acquire
Physio-Control,  a company that designs, manufactures,  markets, and services an
integrated line of noninvasive  emergency  cardiac  defibrillator and vital sign
assessment  devices,   disposable  electrodes,  and  data  management  software.
Physio-Control's products are used in both out-of-hospital and hospital settings
for the detection and treatment of  life-threatening  events  including  trauma,
heart  attack,   and  the  acute  heart  rhythm   disturbances   of  ventricular
fibrillation, tachycardia, and bradycardia.

         Pursuant to the acquisition  agreement,  upon the fulfillment or waiver
of certain  conditions,  a wholly-owned  subsidiary of Medtronic created for the
Physio-Control   acquisition   will   merge   with  and   into   Physio-Control.
Physio-Control  will then become a  wholly-owned  subsidiary  of  Medtronic in a
stock-for-stock  merger that is expected to be tax-free and  accounted for using
pooling of interests accounting  treatment.  In the Physio-Control  merger, each
outstanding share of stock of Physio-Control  will be exchanged for the right to
receive  the  fraction  of a share of  Medtronic  Common  Stock  equal to $27.50
divided by the Average  Stock Price of  Medtronic  Common  Stock for a specified
period preceding the effective time of the Physio-Control merger. Physio-Control
has approximately 21 million shares outstanding on a fully diluted basis.

Other Investments and Acquisitions

         Medtronic has historically  been, and continues to be, actively engaged
in exploring business  opportunities  through  investments and acquisitions.  As
such, at any particular  time, in addition to investments and  acquisitions  for
which definitive agreements have been executed and publicly announced, Medtronic
is routinely reviewing several other investment or acquisition  opportunities of
varying  magnitude and  significance  or negotiating the terms of such potential
investments or acquisitions prior to the execution of definitive  agreements and
public announcements thereof.


             COMPARATIVE RIGHTS OF MEDTRONIC AND AVECOR SHAREHOLDERS

         Upon  consummation  of the Merger,  shareholders  of AVECOR will become
shareholders of Medtronic.  Although  Medtronic and AVECOR are both incorporated
under the laws of the state of Minnesota,  the rights of Medtronic  shareholders
under Medtronic's  Restated  Articles of Incorporation as amended  ("Medtronic's
Articles") and Medtronic's  Bylaws differ in certain respects from the rights of

<PAGE>

AVECOR shareholders under AVECOR's Second Restated Articles of Incorporation, as
amended  ("AVECOR's  Articles"),  and  AVECOR's  Bylaws,  as amended  ("AVECOR's
Bylaws").  Certain  significant  differences  between  the  rights of  Medtronic
shareholders  and AVECOR  shareholders are summarized  below.  This summary does
not,  however,  purport to be a complete  description of all of the  differences
between the rights of  shareholders  of AVECOR and the rights of shareholders of
Medtronic.

Classification, Removal, and Nomination of Directors

         Classification.  Medtronic's Articles provide for a classified Board of
Directors, under which directors are elected to three-year terms, with one-third
of the directors being elected each year.  AVECOR's Articles do not classify its
Board of Directors, and directors are elected each year for a one-year term.

         Removal.  Medtronic's  Articles  provide that directors may be removed,
with or without cause, only by the vote of not less than 75% of the voting power
of all then  outstanding  voting shares.  AVECOR's Bylaws provide that directors
may be removed,  with or without cause, by the vote of the holders of a majority
of the shares then entitled to vote at an election of directors.

         Nomination.  Medtronic's  Articles  provide  that  nominations  for the
election of directors may be made by or at the direction of the Medtronic  Board
of Directors or by any shareholder entitled to vote in the election of directors
generally. Nominations by shareholders must be made pursuant to timely notice in
writing to the Secretary of Medtronic. To be timely, a shareholder's notice must
be  delivered to or mailed and received at the  principal  executive  offices of
Medtronic  not less  than 50 days nor more  than 90 days  prior to the  meeting;
provided,  however, that if less than 60 days' notice or prior public disclosure
of the date of the meeting is given or made to the  shareholders,  notice by the
shareholder  to be  timely  must be so  received  not  later  than the  close of
business on the tenth day  following the day on which such notice of the date of
the meeting was mailed or such public  disclosure  was made. The notice must set
forth certain information concerning such shareholder and his or her nominee(s),
including their names and addresses,  the principal  occupation or employment of
the  nominee(s),  the class and number of shares of capital  stock of  Medtronic
that are beneficially owned by such persons,  such other information as would be
required to be included in a proxy statement soliciting proxies for the election
of the nominees of such shareholder, and the consent of each nominee to serve as
a director of  Medtronic  if so  elected.  AVECOR's  Articles  and Bylaws do not
address the issue of nomination of directors.

         Amendment of Provisions.  Medtronic's  Articles require the affirmative
vote of not less than 75% of the  voting  power of all then  outstanding  voting
shares to amend, repeal or adopt any provisions  inconsistent with provisions of
Medtronic's  Articles  regarding  classification,  removal,  and  nomination  of
directors.  AVECOR's  Bylaws  provide that  AVECOR's  Board of Directors has the
power to make, alter,  amend or rescind  provisions of AVECOR's Bylaws including
provisions regarding removal of directors.

         The  above-described  provisions of  Medtronic's  Articles and AVECOR's
Articles regarding  directors will be subject to the terms of the certificate of
designation or other instrument  creating any class or series of preferred stock
giving the holders of such class or series of preferred stock the right,  voting
separately as a class, to elect one or more directors (such as is often required
by the terms of  preferred  stock in the event  that  dividend  payments  are in
arrears for a period of time). See "Comparative Rights of Medtronic Shareholders
and AVECOR Shareholders--Preferred Stock."
<PAGE>

         These provisions regarding  classification,  removal, and nomination of
directors afford some assurance of stability in the composition of the Medtronic
Board of Directors,  but may  discourage  or deter  attempts by  individuals  or
entities to take control of Medtronic by electing  their own slate of directors.
To the extent that  potential  acquirers of Medtronic  stock are deterred by the
classified Board, such provision also may deter certain mergers,  tender offers,
or other  future  takeover  attempts  which  some or a  majority  of  holders of
Medtronic Common Stock may deem to be in their best interests.  In addition, the
classified  Medtronic  Board  would  delay  shareholders  who do not  favor  the
policies  of  Medtronic's  Board of  Directors  from  removing a majority of the
Medtronic Board of Directors for two years, unless they can obtain the requisite
vote.

         Liability of Directors. Both Medtronic's Articles and AVECOR's Articles
exempt directors from personal  liability to the corporation or its shareholders
for  monetary  damages  for breach of  fiduciary  duty as a director to the full
extent permitted by Minnesota law.

Preferred Stock

         Medtronic has  2,500,000  authorized  but unissued  shares of Preferred
Stock,  par value $1 per share.  Medtronic's  Articles provide that whenever the
holders  of a class or series  of  Preferred  Stock  have the right to elect any
directors,  the election, term and other features of such directorships shall be
governed  by the terms set forth in the  resolution  of the  Medtronic  Board of
Directors  designating  the  rights and  preferences  of such class or series of
Preferred  Stock,  and any directors  elected by the holders of Preferred  Stock
shall not be divided into classes  unless  provision is expressly  made for such
classification  by the  terms  of such  Preferred  Stock.  Shares  of  Medtronic
Preferred  Stock could be issued  that would have the right to elect  directors,
either  separately  or  together  with the  Medtronic  Common  Stock,  with such
directors either divided or not divided into classes.

         Under certain  circumstances  such Medtronic  Preferred  Stock could be
used to  create  voting  impediments  or to deter  persons  seeking  to effect a
takeover or otherwise  gain control of Medtronic in a transaction  which holders
of some or a majority of the Medtronic Common Stock may deem to be in their best
interests.  Such shares of Medtronic  Preferred stock could be sold in public or
private  transactions  to purchasers  who might  support the Medtronic  Board of
Directors  in  opposing a takeover  bid that the  Medtronic  Board of  Directors
determines not to be in the best interests of Medtronic and its shareholders. In
addition, the Medtronic Board of Directors could authorize holders of a class or
series of Preferred Stock to vote, either separately as a class or together with
the holders of  Medtronic  Common  Stock,  on any merger,  sale,  or exchange of
assets  by  Medtronic  or any other  extraordinary  corporate  transaction.  The
ability  to issue  such  Medtronic  Preferred  Stock  might  have the  effect of
discouraging an attempt by another person or entity,  through the acquisition of
a substantial  number of shares of Medtronic Common Stock, to acquire control of
Medtronic  with a view to  imposing  a  merger,  sale of all or any  part of the
assets or a similar  transaction,  because the  issuance of new shares  could be
used to dilute the stock ownership of such person or entity.

         AVECOR has 2,000,000 authorized but unissued shares of Preferred Stock,
par value $.01 per share, and the Board of Directors has the authority to fix or
alter the terms of such shares.  In  connection  with the adoption of the AVECOR
Rights  Agreement,  200,000 of such  shares were  designated  as Series A Junior
Preferred   Stock.   See   "Comparative   Rights   of   Medtronic   and   AVECOR
Shareholders--Shareholder Rights Plans."


<PAGE>

Special Meetings of Shareholders

         Under Minnesota law, a special meeting of shareholders may be called by
certain  officers,  two or more directors,  a person  authorized to do so in the
articles or bylaws, or shareholders  holding at least 10% of the voting power of
all shares  entitled to vote,  except that a special  meeting for the purpose of
considering an action to effect, directly or indirectly,  a business combination
must be called by  shareholders  holding at least 25% of the voting power of all
shares entitled to vote.

Voting Rights; Shareholder Approvals

         Under both  Medtronic's  Articles  and  AVECOR's  Articles,  holders of
Medtronic  Common Stock and AVECOR Common Stock,  respectively,  are entitled to
one  vote per  share on all  matters  submitted  to a vote of the  shareholders.
Medtronic's Bylaws provide that, except as specifically required otherwise under
Medtronic's  Articles,  Bylaws or Minnesota  law,  all matters  submitted to the
shareholders  are decided by a majority vote of the shares  entitled to vote and
represented at a meeting at which there is a quorum.

Cumulative Voting

         Neither   Medtronic's   Articles  nor  AVECOR's  Articles  provide  for
cumulative voting with regard to the Medtronic Common Stock or the AVECOR Common
Stock, respectively.

Preemptive Rights

         Under Medtronic's Articles and AVECOR's Articles,  holders of Medtronic
stock and AVECOR stock,  respectively,  are expressly denied preemptive  rights.
The MBCA provides that a corporation's  shareholders have preemptive rights only
if  such  rights  are  expressly  granted  in  the  corporation's   articles  of
incorporation.

Amendment of the Articles of Incorporation

         Under  Minnesota  law, an amendment  to the  articles of  incorporation
requires the affirmative vote of the holders of a majority of the shares present
and  entitled  to vote  unless  a larger  affirmative  vote is  required  by the
corporation's  articles.  Except as  specifically  described  otherwise  in this
"Comparative Rights of Medtronic  Shareholders and AVECOR Shareholders," neither
Medtronic's Articles nor AVECOR's Articles contain any provisions that require a
larger affirmative vote in order to amend Medtronic's Articles.

Business Combinations and Control Share Acquisitions

         Medtronic and AVECOR are governed by Sections  302A.671 and 302A.673 of
the MBCA. In general, Section 302A.671 provides that the shares of a corporation
acquired in a "control  share  acquisition"  have no voting rights unless voting
rights are approved in a prescribed  manner. A "control share acquisition" is an
acquisition,  directly or  indirectly,  of  beneficial  ownership of shares that
would,  when  added to all  other  shares  beneficially  owned by the  acquiring
person,  entitle the acquiring person to have voting power of 20% or more in the
election of directors. In general, Section 302A.673 prohibits a public Minnesota
corporation  from  engaging  in a  "business  combination"  with an  "interested
shareholder"  for a period of four years  after the date of the  transaction  in
which  the  person  became  an  interested  shareholder,   unless  the  business

<PAGE>

combination is approved in a prescribed manner.  "Business combination" includes
mergers,  asset sales and other transactions resulting in a financial benefit to
the interested shareholder.  An "interested  shareholder" is a person who is the
beneficial  owner,  directly or indirectly,  of 10% or more of the corporation's
voting stock or who is an affiliate or associate of the  corporation  and at any
time within four years prior to the date in question was the  beneficial  owner,
directly or indirectly,  of 10% or more of the corporation's  voting stock. Such
provisions  of Minnesota  law could have the effect of delaying,  deferring,  or
preventing a change in control of Medtronic or AVECOR.

Shareholder Rights Plans

         Medtronic.  Medtronic has in effect a  Shareholder  Rights Plan and has
entered into a Rights  Agreement  with Norwest Bank  Minnesota,  N.A., as Rights
Agent.  The Rights Plan  provides for a dividend  distribution  of one preferred
stock  purchase right (a "Medtronic  Right") to be attached to each  outstanding
share of Medtronic  Common  Stock.  The  Medtronic  Right  associated  with each
outstanding  share of Medtronic Common Stock entitles the holder to buy 1/1600th
of a Series A Junior  Participating  Preferred  Share (the  "Series A  Preferred
Shares")  of  Medtronic,  which  is  substantially  equivalent  to one  share of
Medtronic  Common Stock, at an exercise price of $37.50 per 1/1600th of a Series
A  Preferred  Share.  The  Medtronic  Rights are not  currently  exercisable  or
transferable apart from the Medtronic Common Stock.

         The  Medtronic  Rights  will  become  exercisable  if a person or group
acquires  15% or more of the  Medtronic  Common  Stock (and  thereby  becomes an
"Acquiring  Person") or  announces a tender  offer or exchange  offer that would
increase  the  Acquiring  Person's  beneficial  ownership  to 15% or more of the
outstanding  Medtronic Common Stock,  subject to certain  exceptions.  After the
Medtronic  Rights become  exercisable,  each Medtronic Right entitles the holder
(other the Acquiring Person),  instead,  to purchase Medtronic Common Stock that
has a market value of two times the exercise  price of the Medtronic  Right.  If
Medtronic  is acquired in a merger or other  business  combination  transaction,
each exercisable Medtronic Right entitles the holder to purchase common stock of
the  Acquiring  Person or an affiliate  that has a market value of two times the
exercise price of the Medtronic  Right.  Each  Medtronic  Right is redeemable by
Medtronic  at  $.000625  any  time  before a person  or group  triggers  the 15%
threshold to become an Acquiring Person. The Medtronic Rights expire on July 10,
2001.

         The Medtronic Rights issued under the Medtronic Shareholder Rights Plan
may make any merger not approved by Medtronic's Board of Directors prohibitively
expensive, because the Medtronic Rights allow Medtronic shareholders to purchase
the voting  securities  of Medtronic or a potential  acquirer at one-half of its
fair market value.

         AVECOR.  AVECOR also has entered into a Rights  Agreement  with Norwest
Bank  Minnesota,  N.A.  (the  "AVECOR  Rights  Agreement").  The  AVECOR  Rights
Agreement  provides  for  issuance of one  preferred  share  purchase  right (an
"AVECOR Right") to be attached to each outstanding share of AVECOR Common Stock.
Upon  certain  events,  each AVECOR  Right  entitles  the  registered  holder to
purchase  from  AVECOR  one  one-thousandth  of  a  share  (a  "Preferred  Share
Fraction")  of AVECOR's  Series A Junior  Preferred  Stock or a  combination  of
securities and assets of equivalent value at a purchase price of $80.00, subject
to adjustment.

         The  AVECOR  Rights  Agreement  further  provides  that,  with  certain
exceptions,  upon 10 days  after (i) a person or group (an  "Acquiring  Person")
becomes the beneficial owner of more than 15% of the then outstanding  shares of
AVECOR Common Stock, or (ii) at least a majority of the  "Continuing  Directors"
of  AVECOR's  Board of  Directors  (as defined in the AVECOR  Rights  Agreement)
determine  that a person is an "Adverse  Person"  (also as defined in the AVECOR

<PAGE>

Rights Agreement), then each holder of an AVECOR Right (other than the Acquiring
Person or the Adverse Person, as the case may be) will thereafter have the right
to receive,  upon  exercise,  that number of Preferred  Share  Fractions (or, in
certain  circumstances,  that  number of shares of AVECOR  Common  Stock,  cash,
property,  or other  securities  of AVECOR)  having a market  value equal to two
times the exercise price of the AVECOR Right.

         In the event that (i) AVECOR is acquired in a merger or other  business
combination in which AVECOR is not the surviving  corporation or in which AVECOR
Common Stock is changed or exchanged,  or (ii) 50% or more of AVECOR's assets or
earning power is sold or transferred, and such transactions described in (i) and
(ii) are not  "Permitted  Offers" (as defined in the AVECOR  Rights  Agreement),
then the AVECOR  Rights  Agreement  provides that each holder of an AVECOR Right
(except for an Acquiring  Person or an Adverse Person) shall thereafter have the
right to receive, upon exercise,  shares of common stock of the acquiring entity
at half of the then-current market price of such shares.

         The AVECOR  Rights may be redeemed by action taken by a majority of the
Continuing  Directors  at a price of $.001 per AVECOR Right at any time prior to
the time 10 days after  which a person is  declared  an Adverse  Person or after
which an Acquiring  Person  acquires or obtains the right to acquire  beneficial
ownership of 15% or more of the then outstanding shares of AVECOR Common Stock.

         In  connection  with the  consideration  and  approval  of the  Merger,
AVECOR's Board of Directors  approved  amendments to the AVECOR Rights Agreement
on July 12 and August 21,  1998.  These  amendments  were adopted to clarify the
effect under the AVECOR  Rights  Agreement  of the Merger with  Medtronic or any
similar  transaction,  and to provide  that  Medtronic  will not be  declared an
Adverse  Person  because of  Medtronic's  beneficial  ownership of AVECOR Common
Stock as a result  of the  Stock  Option  Agreement  and the  voting  agreements
between  Medtronic and officers and directors of AVECOR.  Pursuant to the AVECOR
Rights Agreement, as amended, all AVECOR Rights will expire upon consummation of
the Merger.

Related Person Business Transactions

         Medtronic's  Articles  provide  that,  in  certain  circumstances,   an
affirmative  vote of  two-thirds  of the  voting  power of all then  outstanding
voting  shares is required  for the  approval or  authorization  of any "related
person business transaction." Such two-thirds approval is not required, however,
if (i) a majority vote of "continuing  directors"  (as defined below)  expressly
approves the related  person  business  transaction,  or (ii) the related person
business transaction is a merger,  consolidation,  exchange of shares or sale of
all or substantially all of the assets of Medtronic, and the cash or fair market
value of the  property  received  by the  Medtronic  shareholders  is equal to a
defined minimum  purchase price.  For purposes of this provision,  a "continuing
director"  means,  generally,  those  directors  who were  directors  before the
"related person" (as defined below) became a related person.

         Generally,  a related  person  business  transaction  includes  (i) any
merger or  consolidation  of Medtronic with or into a related  person,  (ii) any
exchange of shares of Medtronic (or a subsidiary) for shares of a related person
which  would have  required  an  affirmative  vote of at least a majority of the
voting power of the outstanding  shares entitled to vote, (iii) any sale, lease,
exchange,  transfer,  or other  disposition  (in one  transaction or a series of
transactions),  including  without  limitation a mortgage or any other  security
device,  of  all or any  substantial  part  of the  assets  of  Medtronic  (or a
subsidiary) to or with a related  person,  (iv) any sale,  lease,  transfer,  or

<PAGE>

other disposition (in one transaction or a series of transactions) of all or any
substantial  part of the assets of a related  person to or with  Medtronic (or a
subsidiary), (v) the issuance, sale, transfer, or other disposition to a related
person of any securities of Medtronic (except pursuant to stock dividends, stock
splits, or similar transactions that would not have the effect of increasing the
proportion  of voting  power of a related  person)  or of a  subsidiary  (except
pursuant to a pro rata  distribution to all holders of Medtronic  Common Stock),
(vi) any  recapitalization  or  reclassification  that  would have the effect of
increasing the  proportionate  voting power of a related  person,  and (vii) any
agreement,  contract,  arrangement,  or  understanding  providing for any of the
transactions described above.

         Generally,  for purposes of a related person business transaction,  the
term  "related  person" is broadly  defined to include a wide range of potential
persons,  including  any person or entity that,  together  with  affiliates  and
associates,  beneficially  owns 15% or more of the  outstanding  voting stock of
Medtronic.

         Such a provision could have the effect of impeding a potential acquirer
of  Medtronic   by  requiring  a  larger  than  normal   majority  of  Medtronic
shareholders  to  approve a  transaction.  There is no similar  "related  person
business transaction" provision in AVECOR's Articles.


                          INFORMATION REGARDING AVECOR

General Development of Business

         AVECOR develops,  manufactures,  and markets  specialty medical devices
for  heart/lung  bypass  surgery and  long-term  respiratory  support.  AVECOR's
products include the Affinity microporous,  hollow fiber membrane oxygenator and
related blood  reservoirs,  a line of solid silicone  membrane  oxygenators  and
related blood  reservoirs,  the Affinity blood pump,  the MYOtherm  cardioplegia
delivery  system,  Signature  custom  tubing  packs,  and the Affinity  arterial
filter.

         AVECOR  was  incorporated  in  Minnesota  in  December  1990 and  began
operations  in 1991 when it  purchased  the  surgical  division  of SCIMED  Life
Systems, Inc. (the "Predecessor Business"). The assets purchased included a line
of solid silicone membrane oxygenators. Since the acquisition of the Predecessor
Business, AVECOR has engaged in extensive product development,  resulting in the
introduction  and receipt of  regulatory  clearance  from the U.S. Food and Drug
Administration (the "FDA") to market the following proprietary products:

    Product                                                      Approval Date
    ------------------------------------------------------------ ---------------

    MYOtherm cardioplegia delivery system......................  October 1991
    Signature custom tubing packs..............................  July 1993
    Affinity oxygenator........................................  November 1993
    Affinity blood reservoirs..................................  July 1994
    Affinity arterial filter...................................  October 1995
    MYOtherm XP(TM)(improved cardioplegia delivery system).....  July 1997
    Affinity blood pump........................................  August 1997
    Affinity oxygenator with Trillium(TM)bio-passive surface...  February 1998
<PAGE>

         In  December  1992,  AVECOR  acquired  Cardio Med Ltd.,  a  corporation
organized  under the laws of England and Wales  ("Cardio  Med").  Cardio Med had
been a  distributor  of AVECOR's  disposable  membrane  oxygenators,  cardiotomy
reservoirs,  and cardioplegia  systems and manufactured its own proprietary line
of custom tubing packs. As a result of the acquisition,  Cardio Med has become a
wholly-owned  subsidiary of AVECOR.  Cardio Med's name has since been changed to
AVECOR  Cardiovascular  Ltd. ("AVECOR Ltd.").  During 1995, AVECOR  incorporated
AVECOR  Foreign Sales  Corporation  as a  wholly-owned  subsidiary of AVECOR and
opened a sales  office in  France,  organized  as AVECOR  Cardiovascular  France
S.A.R.L., a French subsidiary of AVECOR Ltd.

Industry Background and Markets

         Industry Background.  AVECOR's products are used in surgical procedures
requiring heart/lung bypass, such as the treatment of coronary artery disease by
coronary  artery bypass graft  surgery  ("CABG" or "coronary  bypass  surgery"),
heart valve  replacement  surgery,  and pediatric and neonatal  congenital heart
defect surgery.  There were  approximately  850,000 heart/lung bypass procedures
performed worldwide in 1997, including  approximately 400,000 of such procedures
performed in the United States,  and  approximately  265,000 of such  procedures
performed in Europe.  Certain of AVECOR's  products are also used in nonsurgical
applications,  such  as  the  long-term  cardiopulmonary  support  of  premature
infants,   newborns,  and  other  patients  with  life-threatening   respiratory
disorders.

         The  primary  use  of  AVECOR's   products  is  for  heart/lung  bypass
procedures  during the surgical  treatment of coronary artery disease.  Coronary
artery  disease,  the  leading  cause  of  death in the  United  States,  is the
atherosclerotic  narrowing  of the  coronary  arteries  that supply blood to the
heart.  Atherosclerosis is the accumulation of cholesterol and blood products on
the inner lining of an artery that causes the arterial  wall to thicken and lose
elasticity, narrowing the inner diameter of the artery. According to an estimate
by the American Heart  Association,  approximately  13,490,000  Americans have a
history of heart  attack,  angina  pectoris  (chest  pain),  or both,  which are
generally   associated  with  coronary   artery  disease.   The  American  Heart
Association  estimated  that,  in the  United  States in 1996,  coronary  artery
disease  would  result  in  1,500,000  acute  myocardial  infarctions,  or heart
attacks, of which approximately 500,000 would result in death.

         In the late 1960s,  cardiovascular  surgeons  pioneered coronary bypass
surgery,  a surgical  treatment for severe cases of coronary  artery  disease in
which blood vessel  grafts are used to bypass the site of the blocked  arteries.
Several of these procedures or "grafts" may be performed during a single surgery
in order to bypass  atherosclerotic  lesions  in more  than one of the  coronary
arteries,  which is  commonly  referred  to as  "multi-vessel"  coronary  artery
disease. Coronary bypass surgery generally requires that the patient be put on a
heart/lung  bypass  circuit  to  enable  the  surgeon  to  operate  on a  still,
relatively  bloodless  heart.  The  heart/lung  bypass  circuit  is a series  of
interconnected  specialty  medical devices that together function as a patient's
heart and lungs by  temporarily  oxygenating  and  circulating  blood  while the
patient's own heart and lungs are rendered  inactive.  AVECOR believes  coronary
bypass surgery accounts for  approximately  75% of the total  heart/lung  bypass
procedures  performed  in the  United  States  and  over  50% of the  procedures
performed in Europe.

         Although coronary bypass surgery is a highly invasive procedure, it has
been shown to be highly effective in treating  coronary artery disease,  and the
number of  procedures  performed  annually  in the United  States has grown from
approximately  200,000 in 1982 to over 400,000 in 1997 (multiple  procedures may
be performed during a single surgery where multi-vessel disease is present). The
annual  worldwide  growth rate in the number of coronary  bypass  procedures has
fluctuated from year to year for various reasons.


<PAGE>

         Since  the  development  of  coronary  bypass  surgery,   a  number  of
nonsurgical  interventional  treatments  for coronary  artery  disease have been
developed  which,  depending  on the extent and nature of the disease as well as
physician preference,  may be used as an alternative to coronary bypass surgery.
These nonsurgical  treatments,  while generally less costly per procedure,  have
limitations  and to date have not resulted in reduced demand for coronary bypass
surgery.

         Percutaneous  transluminal coronary angioplasty ("PTCA") was introduced
in the early 1980s as a nonsurgical  treatment for coronary artery disease. PTCA
is  performed  by  guiding  a   balloon-tipped   catheter  to  the  site  of  an
atherosclerotic  lesion,  followed  by several  courses of  dilation  under high
balloon  pressure.  For many  patients,  PTCA  represents a less costly and less
traumatic alternative to bypass surgery,  while for other patients it represents
a preferred  alternative  to drug therapy.  While the number of PTCA  procedures
performed  grew  significantly  in the  1980s  and early  1990s,  the  number of
coronary bypass procedures performed annually also continued to grow during this
period.

         Although the average cost of a PTCA procedure is approximately one-half
of  the  average  cost  of  coronary  bypass  surgery,   the  need  for  further
interventions for many patients tends to significantly reduce the long-term cost
differential between these two types of procedures.  Studies have indicated that
30% to 50% of PTCA procedures are complicated by "restenosis," a renarrowing, or
often reclosure,  of the dilated vessel within six months. An artery complicated
by  restenosis   often  requires   repeat   procedures,   reducing  the  overall
cost-effectiveness of PTCA. For a significant number of PTCA patients,  coronary
bypass surgery is ultimately  performed.  In patients with multi-vessel coronary
artery  disease,  a  randomized  study  has shown  that  within  three  years of
receiving  treatment,  only 14% of patients  receiving  coronary  bypass surgery
required retreatment  ("revascularization") while 60% of patients receiving PTCA
required revascularization. Additional studies have confirmed that approximately
20% of PTCA  patients with  multi-vessel  disease will undergo  coronary  bypass
surgery  within one year of  receiving  PTCA.  Based  upon the  higher  rates of
revascularization  of  patients  receiving  PTCA  rather  than  coronary  bypass
surgery,  several  studies  have  concluded  that over a  three-year  period the
overall  average  cost of PTCA  procedures  exceeds 75% of the  average  cost of
coronary bypass surgery.

         In  response  to  the   limitations  of  PTCA,  a  variety  of  "second
generation"  interventional  devices  for  coronary  artery  disease  have  been
developed,  including  atherectomy devices (catheter devices that cut and remove
atherosclerotic  materials from the arterial wall),  rotational ablation devices
(catheter devices that use a rotating burr to remove  material),  laser catheter
devices  (devices  that use  laser  energy to reduce  accumulated  materials  in
arteries),  and coronary  stents  (expandable  metal frames that are  positioned
within the diseased area in the coronary artery to maintain the vessel opening).
Of these devices,  coronary stents have  demonstrated the best potential to date
to reduce restenosis in a randomized population. Studies have concluded that the
rate of restenosis  in patients  receiving  coronary  stents  following  PTCA is
approximately 30% lower than in patients treated only by PTCA. However,  the use
of stenting  in  connection  with PTCA  greatly  increases  the cost of the PTCA
procedure.  One study has  indicated  that the average  cost per  procedure  for
elective  stenting in connection with PTCA was  approximately  twice the cost of
PTCA without  stenting (or  approximately  equal to the cost of coronary  bypass
surgery).

         In addition to the existing nonsurgical  treatments for coronary artery
disease,  an additional  treatment modality has emerged for both coronary artery
disease and heart valve replacement procedures (discussed below), which involves
"least" or "minimally"  invasive surgical  procedures.  A significant  number of
these techniques involve small surgical incisions in the patient's chest in lieu
of the larger incision used in traditional CABG or valve replacement  surgeries.
Specialized  surgical  instruments  used in connection  with  endoscopes  enable
surgeons  to  perform  CABG or valve  replacement  surgeries  via these  smaller
incisions. In some variations of this type of procedure, only a modified form of
the  heart/lung  bypass  circuit is required,  which  includes an oxygenator and
related disposables.  In other variations of this type of procedure,  however, a
heart/lung bypass circuit is not utilized.


<PAGE>

         While  this  modality  is in its  developmental  stages  and  currently
requires  significant  surgical  skill and training,  the potential  benefits to
patients  from  this type of  surgery  are a reduced  recovery  period  from the
elimination of the heart/lung  bypass circuit in some  procedures and lower risk
of  infection  as a  result  of the  smaller  incision  utilized  in some of the
procedures. Although some of the patients currently eligible for treatment using
these types of procedures  are not  candidates for more invasive and less costly
procedures,  there can be no assurance that this type of surgical procedure will
not  represent  a  significant  portion of the CABG or heart  valve  replacement
procedures in the future.  Therefore,  it cannot be determined at this time what
effect,  if any, the development and acceptance of these  procedures may have on
the market for AVECOR's disposable heart/lung bypass circuit components.

         A second  significant  use of  AVECOR's  products in  conjunction  with
heart/lung bypass procedures is in heart valve replacement surgery.  Heart valve
replacement  surgery is also an open heart  surgical  procedure,  involving  the
replacement  of valves that regulate the flow of blood  between  chambers in the
heart.  Valve replacement may be required where the valve has become narrowed or
ineffective  due to the build-up of calcium or scar tissue,  or where there is a
congenital  defect or some other  form of  physical  damage to the  valve.  Like
coronary bypass surgery,  valve replacement surgery requires that the patient be
put on a heart/lung  bypass circuit.  AVECOR believes  approximately  20% of the
heart/lung  bypass procedures  performed in the United States,  and 25% of those
performed in Europe, are performed in heart valve replacement surgery.

         Pediatric  and  neonatal  congenital  heart  defect  surgery is another
heart/lung  bypass  procedure  that uses  several of  AVECOR's  products.  These
procedures  are  undertaken to correct  developmental  defects in the heart of a
child or infant.  AVECOR  believes  approximately  5% of the  heart/lung  bypass
procedures  performed  in the  United  States  and  approximately  10% of  those
performed in Europe are  performed in  connection  with this type of  corrective
surgery.

         The primary  nonsurgical use of AVECOR's products is in connection with
a procedure known as extracorporeal  membrane oxygenation ("ECMO").  ECMO is the
long-term  cardiopulmonary  support of premature  infants,  newborns,  and other
patients with life threatening respiratory disorders.  The relatively small ECMO
market served by AVECOR is comprised of 118 established  centers  worldwide,  in
which  approximately  1,500 neonatal ECMO  procedures  (procedures  performed on
children younger than one year) were performed in 1997. Neonatal ECMO procedures
constitute the vast majority of all ECMO  procedures  performed.  There has been
relatively  little  growth in the overall ECMO market in recent years and AVECOR
believes  growth in this market will remain limited until  technology  overcomes
complications  that  are  common  in  long-term  respiratory  support,  such  as
intracranial  bleeding due to the associated  long-term use of  anti-coagulants.
Since AVECOR  manufactures  what it believes to be the only  oxygenator that has
received clearance from the FDA for sale for long-term  cardiopulmonary  support
for  periods  greater  than  24  hours,  AVECOR  believes  it has a  competitive
advantage in this relatively small market.

         Heart/Lung  Bypass  Circuit.  In procedures  requiring  cardiopulmonary
support,  the  patient  is  connected  to a series of  interconnected  specialty
medical devices, collectively called a heart/lung bypass circuit. The heart/lung
bypass  circuit  functions  as the  patient's  heart  and  lungs by  temporarily
oxygenating  and  circulating  blood while the patient's own heart and lungs are
rendered inactive.  The devices in the heart/lung bypass circuit are operated by
a skilled medical professional known as a perfusionist, under the direction of a
surgeon.  The primary  components of a heart/lung bypass circuit,  including the
oxygenator, are single-use,  disposable products. Heart/lung bypass circuits are
customized for the particular practices of individual perfusionists.


<PAGE>

         In  a  typical  heart/lung  bypass  procedure,  blood  is  removed  via
surgically  inserted  "cannulae"  (hollow tubes with specifically  designed tips
that  facilitate  the  drainage  or infusion of blood into or out of a patient's
body) from the patient's vena cava (the large vessels leading to the heart). The
blood  flows  from the  patient's  vena  cava by  gravity  into a  venous  blood
reservoir  where it is collected and  "de-bubbled"  (air is eliminated  from the
blood).  In addition,  blood that is suctioned  from the patient or drained from
the heart is filtered and de-bubbled through a cardiotomy reservoir.  This blood
is then  also  added  to the  venous  blood  reservoir.  From the  venous  blood
reservoir,  the  blood is  mechanically  pumped  by a blood  pump  serving  as a
replacement for the patient's heart through an oxygenator. The oxygenator serves
as a replacement  for the patient's  lungs by removing  carbon  dioxide from and
adding  oxygen to the blood.  The carbon  dioxide and oxygen levels in the blood
are monitored with blood gas monitoring equipment,  allowing the perfusionist to
make  the  proper  adjustments  to  maintain  the  correct  concentrations.  The
oxygenator  also controls the  temperature  of the blood by means of an integral
heat exchanger  connected to a heater-cooler  console.  The oxygenated  blood is
then returned to the patient through a final (arterial)  filter that removes any
potential  air or small  particles.  This  artificial  heart/lung  system is the
primary component of the bypass circuit.

         In addition to the artificial  heart/lung system,  most bypass circuits
also  include a  cardioplegia  delivery  system.  During most  cardiac  surgical
procedures,  the heart is stopped  (arrested)  to  provide  the  surgeon  with a
motionless field for the delicate  surgery.  When this occurs,  the heart muscle
receives very little blood  supply.  A  cardioplegia  system  infuses  specially
formulated  solutions (which often include  oxygenated  blood) directly into the
patient's coronary arteries.  In addition to delivering  nutrients to the heart,
these  solutions  are also used to arrest  the  heart  and  maintain  prescribed
temperatures.

         In  order  to  salvage  the  patient's  own  blood  during  surgery,  a
cell-saver  circuit may be used to collect and  concentrate  the patient's blood
into washed,  packed cells which can be reinfused at a later time to improve the
patient's red blood cell count without the risks  associated with donated blood.
Another method of concentrating the patient's red blood cells is with the use of
a  hemoconcentrator.  This device removes excess fluid from the patient's  blood
(concentrating  the red blood cells) and also  preserves the plasma of the blood
that is generally discarded with typical blood cell salvaging.

         The  heart/lung  bypass  circuit is completed by connecting  all of the
devices with tubing.  Frequently,  this tubing is pre-connected according to the
instructions of individual  perfusionists with all or some of the devices in the
circuit and marketed as custom tubing packs. Increasingly, all of the components
in the  heart/lung  bypass  circuit are  assembled  and  packaged in a complete,
single container for a single heart/lung bypass procedure.

         Markets. AVECOR's products are primarily sold to hospitals that perform
heart/lung  bypass  surgery.  There were  approximately  1,000  hospitals in the
United States and about 400 hospitals in Europe that performed these  procedures
in 1997. Over 400,000  heart/lung bypass procedures were performed in the United
States and  approximately  265,000 such  procedures  were performed in Europe in
1997.  Coronary bypass surgeries  constitute a significant  portion of the total
number of heart/lung bypass procedures  performed each year. Although the number
of heart/lung bypass procedures  performed may have been less than the number of
coronary bypass  surgeries due to multiple  grafts being  performed  during some
surgeries,  the number of graft  procedures  performed in the United States each
year grew from less than 200,000 in 1982 to over 400,000 in 1997.


<PAGE>

         The current annual worldwide market for disposable products and related
hardware and accessories for heart/lung  bypass surgery is estimated by industry
analysts  to be  approximately  $800  million,  over  $600  million  of which is
estimated to be attributable to disposable products.  The two largest individual
markets  for  disposable  products  are  the  oxygenator  market,  estimated  at
approximately  $200 million in annual sales,  and the custom tubing pack market,
estimated  at  approximately  $100  million in annual  sales.  AVECOR's  current
proprietary  product  offerings  participate in an annual  worldwide  market for
disposable  products  estimated to be  approximately  $480  million,  and AVECOR
anticipates  that  its  proprietary   products  under   development,   including
additional  products coated with its new Trillium  bio-passive  surface,  should
allow AVECOR to pursue a greater portion of the disposable product market.

Products

         AVECOR  currently offers four primary product lines: the Affinity line;
the solid silicone membrane oxygenator line; the MYOtherm  cardioplegia delivery
system;  and Signature custom tubing packs.  "Other  products"  include products
distributed  by AVECOR which do not  represent any of AVECOR's  primary  product
lines and,  combined or  individually,  do not represent a primary  product line
within  AVECOR's  business.  The  following  table  sets forth the  amounts  and
percentages  of  AVECOR's  consolidated  net sales  attributable  to these  four
product lines for the periods shown.
<TABLE>
<CAPTION>

                                                                      Years Ended December 31,
                                                              1997                 1996                  1995   
                                                         -------------         -------------         -------------
                                                                      (Dollars in thousands)
<S>                                                      <C>       <C>         <C>       <C>         <C>       <C>
       Affinity line................................     $26,185   56%         $25,488   57%         $18,329   55%
       Signature custom tubing packs................       9,803   21            7,402   17            3,459   10
       Silicone membrane oxygenator line............       7,081   15            7,517   17            7,793   24
       MYOtherm cardioplegia deliver system.........       3,655    8            3,994    9            3,759   11
       Other products...............................         140    -               -     -               -      -
                                                         -------  ----         -------  ----         -------  ----
       TOTAL........................................     $46,864  100%         $44,401  100%         $33,340  100%
                                                         -------  ----         -------  ----         -------  ----
</TABLE>

         Affinity  Line.  AVECOR's  Affinity line is currently  comprised of the
Affinity  oxygenator,  the Affinity  blood pump, a hardshell  cardiotomy  venous
reservoir, and a venous reservoir bag.

         The  Affinity  oxygenator  is  a  microporous,  hollow  fiber  membrane
oxygenator which exchanges the carbon dioxide in the patient's blood for oxygen,
returning oxygenated blood to the patient through the heart/lung bypass circuit.
This oxygenator incorporates AVECOR's patented radial flow and graduated density
fiber  bundle,   both  of  which  were   developed   through   AVECOR's  use  of
"computational  fluid  dynamics."  Computational  fluid  dynamics  helped AVECOR
design the  Affinity  oxygenator  with  features  such as a lowered  blood phase
pressure  drop, a more uniform flow of blood through the device's  fiber bundle,
and reduced  damage to the blood as it passes  through the device's blood phase.
The key features of the Affinity oxygenator include the following:

o        High Gas Transfer.  AVECOR believes that the Affinity oxygenator offers
         superior gas transfer  performance.  Studies  conducted by  independent
         investigators  have demonstrated  that the Affinity  oxygenator has gas
         transfer  performance  equal  or  superior  to that  of most  competing
         oxygenators. AVECOR believes that most perfusionists desire oxygenators
         that provide  optimum gas  transfer  performance  to assure  safety for
         patients requiring greater oxygen transfer  capability,  such as larger
         patients and patients operated on under lighter anesthesia or at warmer
         temperatures.
<PAGE>

o        Low Pressure Drop. Studies conducted by independent  investigators have
         determined  the  pressure  drop across the blood phase of the  Affinity
         oxygenator to be as low or lower than that of other  leading  products.
         AVECOR  believes  that  perfusionists  generally  wish to  avoid  large
         pressure drops during  heart/lung  bypass procedures due to the risk of
         line failures associated with high pressure drop.

o        Low Priming Volume. The Affinity  oxygenator has a priming volume which
         AVECOR  believes  to  be  one  of  the  lowest  priming  volumes  among
         oxygenators  currently  available.  Lower priming  volume can result in
         less  set-up  time  for  the  perfusionist,  reduced  dilution  of  the
         patient's  blood  with  priming  solutions,  and a  reduced  use of the
         patient's blood for priming,  which lessens the possibility that costly
         and  potentially  dangerous  donor  blood  products  will  need  to  be
         introduced during the procedure.

o        Ease of Use. The Affinity oxygenator has been designed to be convenient
         to set up, prime,  and operate.  The Affinity  oxygenator's  relatively
         small  size  and  universal  adaptability  contribute  to its  ease  of
         handling,  and its clear case helps to assure quick,  complete  priming
         and ongoing  visual checks during the  procedure.  The device's  unique
         casing  design  and a  proprietary  manufacturing  technique  result in
         precise alignment of the uppermost blood port with the top of the fiber
         bundle,  allowing for ease in venting air during the priming procedure.
         AVECOR  believes that  perfusionists  have a preference for oxygenators
         that permit easy removal of air during  priming and ease of  monitoring
         for the presence of air during the procedure.

         Although  competing  oxygenators are generally designed to maximize one
or more of these key features,  AVECOR  believes the performance of the Affinity
oxygenator to be equal or superior to competing products across a broad range of
performance  characteristics:  gas transfer  capability,  pressure drop, priming
volume, and ease of use.

         In July 1993,  AVECOR  began  international  marketing  of the Affinity
oxygenator.  AVECOR began the commercial  release of the Affinity  oxygenator in
the U.S. market in February 1994, following marketing clearance from the FDA.

         In February 1997, AVECOR received regulatory  clearance from the FDA to
market its Affinity oxygenator with Trillium  bio-passive  surface. The Trillium
bio-passive  surface is produced by coating  all  blood-contact  surfaces in the
oxygenator  with a non-leaching  synthetic  hydrophilic  polymer that contains a
small amount of heparin, a widely used anti-coagulant.  This surface is designed
to minimize  activation of blood constituents which otherwise occurs as a result
of  contact  with  conventional  synthetic  surfaces.  By  adding  the  Affinity
oxygenator  with Trillium  bio-passive  surface,  AVECOR will be able to offer a
product option that certain competitors now promote.

         In the  heart/lung  bypass  circuit,  the blood  reservoir  serves as a
filtering and storage device.  The Affinity line offers two blood reservoirs,  a
hardshell cardiotomy venous reservoir, and a venous reservoir bag. Computational
fluid dynamics  modeling was also used in the  development of these  reservoirs.
The hardshell  reservoir can be used as a stand-alone  unit or can be integrated
with the Affinity  oxygenator  in one unit.  The venous  reservoir bag maintains
simplicity in its design while  offering  optimum  priming  ease,  efficient air
handling, and excellent mixing  characteristics.  AVECOR received U.S. marketing
clearance from the FDA for its Affinity blood  reservoirs in July 1994 and began
marketing the devices following clearance. By offering these blood reservoirs in
the Affinity  line,  AVECOR is able to configure  systems to meet its customers'
needs.

         The  Affinity  Blood  Pump  System  incorporates  a motor  and  control
console, a rotor housing, rotor assembly, and a disposable pump chamber.  AVECOR
believes that the Affinity Blood Pump System offers a number of clinical  safety
advantages  over  existing   centrifugal  or  standard   roller-type  pumps.  In

<PAGE>

particular, the modified roller-type design of the Affinity Blood Pump System is
designed  to (i)  prevent  significant  negative  pressure  at the inlet,  which
minimizes  the  potential  for  cavitation;  (ii) not permit the draining of the
venous reservoir and the resulting  introduction of air into the bypass circuit;
(iii) not create  high  discharge  pressures  sufficient  to disrupt  the tubing
connections in the bypass circuit;  and (iv) not allow retrograde  flow.  AVECOR
believes  that the  Affinity  Blood Pump System is the first and only  available
blood pump to combine  these safety  features  with  performance  comparable  to
available pumps.

         There can be no assurance  that the Affinity  Blood Pump System will be
perceived as superior to currently  available blood pumps, that competitors will
not introduce future products with superior performance characteristics, or that
the  Affinity  Blood Pump  System will  achieve  market  acceptance  or generate
material revenues for AVECOR at any time in the near future, if at all.

         In August 1997,  AVECOR received  regulatory  clearance from the FDA to
market the Affinity Blood Pump System.  By adding the Affinity Blood Pump System
to its product line,  AVECOR is now able to offer a complete line of proprietary
devices comprising the major components of the heart/lung bypass circuit.

         Signature Custom Tubing Packs.  AVECOR's  Signature custom tubing packs
include  the  tubing  and  other  connections  used  to  integrate  the  various
components of the heart/lung  bypass circuit and ECMO system.  The components to
be included in each  tubing pack and the manner in which they are  arranged  and
connected are determined by the specifications  provided by AVECOR's  individual
customers.  AVECOR has developed  computer software that allows it to design and
fully   document   custom  tubing  packs   according  to   individual   customer
specifications and to quote prices based on these specifications within hours of
a  customer  request.  AVECOR  believes  that this  service  provides  it with a
significant  competitive  advantage.  While  many  of the  devices  included  in
AVECOR's  Signature  custom  tubing  packs are  manufactured  by AVECOR,  AVECOR
currently  does  not  manufacture  all the  devices  that  may be  requested  by
customers.  Consequently,  AVECOR is  currently  required  to  purchase  certain
components  of its  Signature  custom  tubing  packs from other  medical  device
manufacturers.  AVECOR  received  marketing  clearance  from  the  FDA  for  its
Signature custom tubing packs in June 1993.

         In October 1995,  AVECOR  received FDA clearance to market its Affinity
arterial  filter.  AVECOR began sales of this product to customers in late 1995,
with full worldwide  release in the first quarter of 1996. The Affinity arterial
filter is the final component in the circuit of specialized medical devices used
in heart/lung bypass surgery,  ensuring that the oxygenated blood is free of air
or particulate  emboli before  re-entering the patient's  body.  AVECOR believes
that the Affinity  arterial filter offers low volume priming,  high  visibility,
and  excellent  air handling  and  hemodynamics.  The vast  majority of Affinity
arterial  filter  devices are sold as components of its Signature  custom tubing
packs.  Previously,  AVECOR had sold filters from other manufacturers as part of
its custom tubing packs.

         Silicone  Membrane  Oxygenator Line.  AVECOR's solid silicone  membrane
oxygenator  line consists of AVECOR's  solid  silicone  membrane  oxygenator and
associated  cardiotomy  reservoirs  and AVECOR's ECMO  (extracorporeal  membrane
oxygenation)  devices.  This  product  line was  purchased  by  AVECOR  from the
Predecessor Business.

         AVECOR's solid silicone membrane oxygenators allow gases to pass to and
from blood using  proprietary  silicone membrane  technology,  as opposed to the
most widely used oxygenators that use microporous membrane technology (including
the Affinity  oxygenator).  The solid silicone membrane technology permits,  and

<PAGE>

may be sold for,  extended use  applications  because it does not experience the
performance  deterioration  over  a  longer  period  of  use  that  occurs  in a
microporous membrane  oxygenator.  In addition,  some perfusionists  continue to
prefer silicone membrane  oxygenators for heart/lung bypass  procedures.  AVECOR
believes that its solid  silicone  membrane  oxygenator  is the only  oxygenator
which is approved for sale for  extended  use of periods  greater than 24 hours,
providing  AVECOR with a competitive  advantage in this relatively small market.
AVECOR  markets a full line of solid  silicone  membrane  oxygenators in several
models and sizes.

         AVECOR's  solid silicone  membrane  oxygenator is also part of AVECOR's
ECMO system. ECMO is the long-term cardiopulmonary support of premature infants,
newborns, and other patients with life-threatening  respiratory  disorders.  The
ECMO system includes the membrane oxygenator, reservoir bladder bags, and a heat
exchanger.

         MYOtherm Cardioplegia  Delivery System.  AVECOR's MYOtherm cardioplegia
delivery system is used to infuse specially  formulated  solutions,  which often
include  oxygenated blood,  directly into the patient's  coronary arteries while
the heart is stopped during heart/lung bypass surgery. In addition to delivering
nutrients to the heart,  these  solutions  are also used to arrest the heart and
maintain prescribed temperatures. AVECOR believes that the MYOtherm cardioplegia
delivery  system  provides  superior  levels of heat  exchange  performance  for
optimum  temperature  control  during both the  cooling  and  warming  phases of
heart/lung bypass surgery. The MYOtherm cardioplegia delivery system also offers
adaptability  and  convenience  for  varying  cardioplegia  techniques  used  by
cardiovascular  surgeons.  The  perfusionist  is able  to  specify  mixtures  of
cardioplegia  solutions and blood in the MYOtherm  cardioplegia  delivery system
without  changing the pump  set-up.  AVECOR  released its MYOtherm  cardioplegia
delivery system worldwide in October 1991.

         In July 1997, AVECOR received  marketing  clearance from the FDA for an
improved  MYOtherm  cardioplegia  delivery  system known as the MYOtherm XP. The
MYOtherm XP offers lower priming volume,  better air handling,  and a new safety
valve to prevent  an air  pressure  induced  failure  of the  MYOtherm  XP while
retaining all the other  advantages  of the  predecessor  MYOtherm  cardioplegia
delivery system.

         OnCourse(R)   Continuous  Quality  Control  Improvement   Software.  In
addition to AVECOR's  medical device  products,  AVECOR  introduced its OnCourse
continuous  quality  improvement  (CQI) manager in December 1995. This Microsoft
Windows(R)-based  software  program  is  currently  offered  free of  charge  to
customers who make a major commitment to AVECOR's products. OnCourse CQI Manager
guides perfusionists  through the necessary steps in establishing a CQI program.
In  addition,  it  generates  a variety  of useful  reports  for  perfusionists,
including  the  annual  American  Board  of  Cardiovascular  Perfusion  clinical
activity report and several other specialized reports.

         In March 1997,  AVECOR released OnCourse II, an improved version of its
original OnCourse CQI software.  The major  improvements for OnCourse II include
upgraded report generation capabilities, user-defined study parameters, tracking
of blood usage during procedures, and a benchmarking utility to compare the host
hospital data to aggregate data from other hospitals via online  communications.
Further  improvements and upgrades are planned for 1998. Although AVECOR markets
this  product  for sale to other  customers,  AVECOR  does not expect  that this
product  will  contribute  significantly  to its  results of  operations  in the
foreseeable future.


<PAGE>

Research and Development

         AVECOR's research and development strategy  encompasses  continuing the
development  of a complete line of products for the heart/lung  bypass  circuit,
ensuring that existing  products are enhanced or replaced,  based on changing on
market  conditions  and  developing   products  that  address  new  markets  and
opportunities outside of the heart/lung bypass market and that leverage AVECOR's
core technologies and expertise.

         As an integral part of both its research and  development and sales and
marketing strategies,  AVECOR strives to involve its customers to a large extent
in its product development activities. Under confidentiality agreements,  AVECOR
consults  with  selected  customers  from  time to time as to  market  needs and
assessments of products under  development by AVECOR.  AVECOR believes that this
practice allows it to receive end-user assessments of products in development at
an early stage and to better assure market acceptance.

         AVECOR's  research and development  staff consisted of approximately 24
full-time engineers,  scientists,  designers, and technicians as of December 31,
1997.  Research and development  expenses in 1997 were  $3,902,000,  as compared
with $3,651,000 in 1996 and $2,773,000 in 1995.

Marketing

         AVECOR  markets its products in the United States and  internationally,
with domestic sales  accounting for 59%, 59%, and 58% of consolidated  net sales
in 1997, 1996, and 1995,  respectively.  The majority of AVECOR's  international
sales are in Europe.

         To serve the U.S.  market,  AVECOR has  developed a sales  organization
that markets its products  directly to cardiovascular  surgeons,  perfusionists,
neonatologists,  and ECMO specialists.  This organization consists of a staff of
17  direct  sales  employees  and is  supplemented  by seven  independent  sales
representative  organizations,  all with cardiovascular  sales experience.  This
network is managed by four  regional  sales  managers  and a vice  president  of
marketing and sales. At its inception,  AVECOR  marketed its products  primarily
through  distributors and independent  sales  representatives.  Since that time,
AVECOR has shifted the  composition  of its  distribution  network in the United
States to its current direct sales  organization.  Approximately 93% of AVECOR's
U.S. sales in 1997 occurred through direct sales employees and independent sales
representatives.  AVECOR believes that this shift to a larger direct sales force
allows  better  control of the sales  process and assists  AVECOR in  developing
closer relationships with its customers.

         Internationally,  AVECOR sells its products  through 38  cardiovascular
distributors  who cover most major foreign  markets.  AVECOR's U.K.  subsidiary,
AVECOR  Ltd.,  is the base of  AVECOR's  international  marketing  efforts,  and
manufactures,  assembles,  and distributes  AVECOR's products to the majority of
AVECOR's  international  distribution network.  This international  distribution
network  is managed  by an  international  sales  director  and an export  sales
manager,  both of whom are experienced in marketing heart/lung bypass devices in
Europe.  AVECOR's  international  distribution  network is supplemented by seven
direct sales employees,  three in the U.K., two in France, and two in Canada. In
October 1995,  AVECOR  opened a sales office in France,  which is organized as a
subsidiary  of AVECOR Ltd.  Total  export  sales from the U.S.  to  unaffiliated
entities  (primarily  to Europe and Asia and payable in U.S.  dollars) and sales
made by AVECOR Ltd. were $4,952,000 and $14,230,000,  respectively, for the year
ended December 31, 1997; $4,912,000 and $13,111,000,  respectively, for the year
ended December 31, 1996; and $3,480,000 and $10,702,000,  respectively,  for the
year ended December 31, 1995.


<PAGE>

         AVECOR  currently  has written  agreements  with 21 of its  independent
sales representatives and international distributors. These agreements generally
impose  geographic  exclusivity  and  noncompetition   obligations  on  AVECOR's
independent   sales    representatives   and   distributors.    AVECOR's   sales
representative  agreements typically include a provision that requires AVECOR to
pay a  commission  to the sales  representative  for any sales made  directly by
AVECOR  to  customers  within  such  sales   representative's  or  distributor's
territory.  Distributor  agreements  generally  do  not  require  AVECOR  to pay
commissions.  AVECOR may typically terminate these agreements upon breach of the
agreement by the distributor or sales  representative,  including  breach of the
quota or minimum sales obligations imposed by the agreement,  as well as certain
extraordinary events. In addition to these written agreements, AVECOR has verbal
arrangements with 17 other  international  distributors.  While AVECOR generally
considers its relationships  with its distributors and sales  representatives to
be good,  the  announcement  of the Merger  with  Medtronic  may have an adverse
impact on AVECOR's sales of products  through  certain of its  distributors  and
sales representatives. The impact of this announcement on AVECOR's relationships
with its  distributors  could  ultimately  have a  material,  adverse  impact on
AVECOR's  business,  financial  condition,  and results of operations during the
pendancy of the Merger or if the Merger is not consummated for any reason.

         AVECOR's   products  are  primarily  sold  to  hospitals  that  perform
heart/lung bypass  procedures.  In the United States,  AVECOR believes there are
approximately   1,000  hospitals  at  which  heart/lung  bypass  procedures  are
performed,  while in Europe approximately 400 hospitals perform such procedures.
There  are  approximately  118  hospitals  worldwide  where  ECMO is  performed.
AVECOR's products are used by perfusionists, and AVECOR estimates that there are
about 3,000 perfusionists practicing in the United States.

         A small portion of AVECOR's  business is subject to longer term (longer
than one year)  commitments  with  customers.  These  commitments  involve fixed
pricing terms and minimum or exclusive  purchase  obligations.  Many of AVECOR's
competitors,   which  have   greater   financial   resources   and  broader  and
longer-standing  product lines than AVECOR, have experienced  relatively greater
success in establishing these types of customer commitments.  AVECOR anticipates
that  there  will  be  increased  use of  these  longer  term,  firm  commitment
arrangements in its markets due to cost concerns and other factors.

         AVECOR's  sales  and  marketing   strategy   includes   developing  and
maintaining a close working  relationship  with its customers in order to assess
and satisfy  their needs for  products and  services.  AVECOR meets with certain
designated  customers  several  times each year,  during  which ideas are shared
regarding  the  marketplace  in  general,  specific  products,   products  under
development and existing or proposed programs.  In lieu of expensive advertising
and promotional materials, AVECOR maintains extensive contact with its customers
for the purpose of educating  them in AVECOR's  technologies  and  manufacturing
methods  as well  as to  receive  input  and  feedback  about  AVECOR's  product
development and customer service functions.  AVECOR believes these efforts to be
cost-effective in producing awareness of, and loyalty to, AVECOR's products.

         AVECOR  conducts  frequent  training of its sales  force to  facilitate
response  to customer  needs.  AVECOR also  maintains a  24-hour/day  assistance
program  in  order  to  respond  quickly  to  clinical  questions  and  problems
encountered by its customers.  The assistance  services are provided by a former
certified clinical perfusionist employed by AVECOR and are supplemented by other
certified  clinical  perfusionists  employed  by AVECOR as well as a network  of
perfusionist consultants located across the country.


<PAGE>

         No single  customer  accounted  for more than 10% of AVECOR's  1997 net
sales.

Competition

         The   cardiovascular   device  market  in  which  AVECOR   competes  is
characterized  by intense  competition.  This market is dominated by established
manufacturers   that  have   broader   product   lines,   greater   distribution
capabilities,  substantially  greater capital  resources,  and larger marketing,
research,  and  development  staffs and  facilities  than AVECOR.  Many of these
competitors  offer broader product lines within the specific  heart/lung  bypass
product  market  and/or in the general  field of medical  devices and  supplies.
Broader product lines give many of AVECOR's competitors the ability to negotiate
exclusive,  long-term  medical device supply  contracts and,  consequently,  the
ability to offer comprehensive  pricing of their competing products. By offering
a broader  product line in the general  field of medical  devices and  supplies,
competitors  may  also  have a  significant  advantage  in  marketing  competing
products to group purchasing  organizations,  health maintenance  organizations,
and other  managed-care  organizations  that  increasingly  seek to reduce costs
through   centralization  of  purchasing   functions.   In  addition,   AVECOR's
competitors  continue to use price  reductions  to preserve  market share in the
oxygenator and other product markets. Therefore, AVECOR must present competitive
product  pricing when required to protect or improve its market share in certain
key areas. There can be no assurance that AVECOR's competitors will not use more
significant and more prolonged price  competition  across AVECOR's product lines
in the future.

         During 1995 and 1996, one of AVECOR's competitors, the Bentley Division
of Baxter  Healthcare  Corporation,  purchased  three  companies  which  provide
contract  perfusion  services to  hospitals.  AVECOR  believes  that  control of
contract  perfusion  groups by its competitors  will continue to have a negative
impact on AVECOR's ability to market its products to such groups or to hospitals
or other medical providers that contract with  competitor-controlled  groups for
perfusion  services,  and could  have a  material  adverse  effect  on  AVECOR's
business,  financial condition,  and results of operation.  This forward-looking
statement  is subject to the degree of control  exerted by AVECOR's  competitors
with respect to purchasing decisions made by controlled groups of perfusionists,
the extent of future  acquisitions  of  contract  perfusion  groups by  AVECOR's
competitors,  the  breadth  of  AVECOR's  product  offerings  relative  to those
competitors  controlling  contract  perfusion  groups,  and the  degree to which
AVECOR's research and development and marketing efforts result in the successful
commercialization   of  products   with   enhanced   or   superior   performance
characteristics.

         AVECOR's  primary  competitors  within  the  heart/lung  bypass  market
include COBE Cardiovascular Inc. (a subsidiary of Gambro, Inc.), Medtronic,  the
Bentley  Division  of Baxter  Healthcare  Corporation,  C.R.  Bard  Inc.,  Sorin
Biomedical, Inc., Terumo Medical Corporation, and SARNS Inc. (a subsidiary of 3M
Company).

         AVECOR  believes that the principal  competitive  factors in the market
for heart/lung  bypass and long-term  respiratory  support  products are product
performance,    quality,    price,   ease   of   use,   technical    innovation,
cost-effectiveness,  field  sales  support,  customer  service,  and  breadth of
product  line.  AVECOR  intends to  continue to compete on the basis of its high
performance  products,  innovative  technologies,  cost-effective  manufacturing
techniques,  close customer relations and support,  and its strategy to increase
and enhance, as dictated by market conditions,  its offerings of products within
the heart/lung bypass circuit and other medical device technologies.


<PAGE>

Manufacturing

         AVECOR manufactures oxygenators and other products and assembles custom
tubing packs at its U.S. facility located in Minneapolis, Minnesota. AVECOR also
performs certain final  manufacturing  processes with respect to its oxygenators
and  blood  reservoirs  and  assembles  Signature  custom  tubing  packs  at its
Bellshill, Scotland facility.

         AVECOR's U.K. and U.S. manufacturing  facilities have been inspected by
the British Standards  Institute  ("BSI") and, as a result,  AVECOR has received
ISO 9001  certification.  BSI is also the "Notified Body" that has verified that
AVECOR's   quality   certification   procedures   conform  with  the   essential
requirements  necessary  for AVECOR to prepare a Declaration  of Conformity  and
therefore  place  the "CE"  mark on its  products.  See  "Information  Regarding
AVECOR--Governmental Regulation."

         As  a  part  of  the  development  process  for  new  products,  AVECOR
simultaneously designs and develops manufacturing  processes and equipment to be
used to  manufacture  the  products.  Because of AVECOR's  ability to design and
produce its manufacturing  equipment  internally in conjunction with new product
development,   AVECOR   has  been  able  to   implement   a  highly   automated,
cost-efficient manufacturing process for the products in its Affinity line.

         AVECOR manufactures its oxygenators,  blood pump, blood reservoirs, and
ancillary  products  from  standard  raw  materials,   components,   and  custom
manufactured  components  presently  purchased  from outside  suppliers.  AVECOR
intends to continue to purchase  these raw  materials,  components,  and custom-
manufactured  components  from  outside  suppliers  in the future.  While AVECOR
believes that the raw materials,  components, and custom manufactured components
used in the  manufacture  of its products are readily  available  from  multiple
sources,  certain of these items are  purchased  from single  sources.  Although
AVECOR has qualified,  or is in the process of investigating,  alternate sources
of supply for key components  and materials,  any  significant  interruption  in
supply of these items could have a material  adverse effect on AVECOR's  ability
to manufacture its products. AVECOR has not experienced shortages or significant
delays in supply of these materials and components from its suppliers.

Governmental Regulation

         AVECOR's products,  development activities, and manufacturing processes
are subject to regulation by numerous governmental authorities,  principally the
FDA  and  corresponding   foreign  agencies.  In  the  United  States,  the  FDA
administers  the Federal Food,  Drug and Cosmetics Act and  amendments  thereto,
including  the Safe  Medical  Devices  Act of 1990.  AVECOR  is  subject  to the
standards and procedures  with respect to  manufacture  and marketing of medical
devices  contained  in  the  Federal  Food,  Drug  and  Cosmetics  Act  and  the
regulations  promulgated  thereunder and is subject to inspection by the FDA for
compliance  with such standards and  procedures.  Noncompliance  with applicable
requirements  can result in,  among  other  things,  fines,  injunctions,  civil
penalties,  recall or  seizure  of  products,  total or  partial  suspension  of
production,  failure of the government to grant premarket clearance or premarket
approval  for  devices,   withdrawal   of  marketing   approvals   and  criminal
prosecution.

         In the United States,  medical devices are classified into one of three
classes (class I, II or III), on the basis of the controls  deemed  necessary by
the  FDA  to  reasonably  assure  their  safety  and  effectiveness.  Under  FDA
regulations,  class I devices are subject to general  controls (e.g.,  labeling,
premarket notification, and adherence to good manufacturing practices) and class
II devices  are  subject to general  and  special  controls  (e.g.,  performance

<PAGE>

standards, postmarket surveillance, patient registries, and FDA guidelines ). In
general,  class  III  devices  (e.g.,  life-sustaining,   life-supporting,   and
implantable  devices,  or new  devices  that have not been  found  substantially
equivalent  to a legally  marketed  device),  in  addition  to being  subject to
general and special controls, must receive premarket approval ("PMA") by the FDA
to ensure their safety and effectiveness.

         Before a new or  significantly  modified  device can be introduced into
the market, the manufacturer must generally obtain marketing clearance through a
510(k) notification or approval of a PMA application. A 510(k) clearance will be
granted if the  proposed  device is  "substantially  equivalent"  to a predicate
device (i.e., a legally marketed class I or class II medical device,  or a class
III medical  device for which the FDA has not called for the submission of a PMA
application).   Commercial   distribution   of  a  device  for  which  a  510(k)
notification  is  required  can  begin  only  after  the FDA  issues  a  written
determination  that the  device is  "substantially  equivalent"  to a  predicate
device.  The FDA may  determine  that a  proposed  device  is not  substantially
equivalent to a predicate  device,  or that  additional  information or data are
needed before a substantial equivalence determination can be made. A request for
additional  data may require that  clinical  studies of the device's  safety and
efficacy be performed. The process of obtaining a 510(k) clearance typically can
take several months to a year or longer.

         A  PMA  application   must  be  filed  if  a  proposed  device  is  not
substantially equivalent to a legally marketed class I or class II device, or if
it is a class III device  for which the FDA has  called  for a PMA  application.
Certain  class  III  devices  that  were  on the  market  before  May  28,  1976
("preamendments  class  III  devices"),   and  devices  that  are  substantially
equivalent to them,  can be brought to market  through the 510(k)  process until
the FDA calls for the submission of PMA applications for preamendments class III
devices.

         The  process  of  obtaining  a PMA  can be  expensive,  uncertain,  and
lengthy,  frequently  requiring anywhere from one to several years from the date
the PMA is submitted to the FDA, if approval is obtained at all. Moreover, a PMA
application,  if granted,  may include significant  limitations on the indicated
uses for which a product may be marketed. FDA enforcement policy strictly limits
the marketing of approved medical devices for unapproved or "off label" uses. In
addition,  product  approvals  can be  withdrawn  for  failure  to  comply  with
regulatory  standards or the occurrence of unforeseen problems following initial
marketing.  All of AVECOR's current products have been the subject of successful
510(k)  submissions,   and  AVECOR  believes  that  its  products  currently  in
development will also be eligible for the 510(k)  submission  process,  although
there can be no assurance that the FDA will agree with this view.

         Certain of AVECOR's products are within product categories set forth in
an FDA  order  dated  August  14,  1995,  issued to all  manufacturers  of these
devices,  which requires all of such  manufacturers to submit additional data to
the FDA regarding  the safety and the efficacy of the  identified  devices.  The
products  affected include AVECOR's blood  oxygenators,  arterial  filters,  and
defoamers,  which,  by current FDA  interpretation,  include both cardiotomy and
venous blood  reservoirs.  Each of these devices is currently  classified by the
FDA as a class III medical device which,  because it was viewed as substantially
equivalent to preamendments class III devices, was cleared for marketing through
the 510(k) premarket  notification  process.  Through its August 14, 1995 order,
the FDA has requested data from AVECOR and other  manufacturers of these devices
in  order  to make a  determination  as to  whether  these  products  should  be
reclassified as either class I or class II medical  devices.  If the FDA were to
determine  that such  devices  should  remain  classified  as class III  medical
devices,   it  would  require   manufacturers  such  as  AVECOR  to  submit  PMA
applications  concerning  such  devices  within  90 days  after  the  final  FDA
classification order.

         AVECOR has gathered the required data for submission to the FDA, and is
working with various  industry  groups and the FDA to seek  reclassification  of
these devices.  Although the FDA order requiring the submission of data on blood
oxygenators  and arterial  filters has  characterized  these devices as having a
high  potential for  down-classification,  and AVECOR  believes that the devices
will be  reclassified,  there can be no  assurance  that these  devices  will be

<PAGE>

reclassified.   Although  the  FDA  order   requesting  data  on  defoamers  has
characterized  these  devices as unlikely to be  reclassified,  and,  therefore,
likely  to  require  PMA  submission,   AVECOR  is  currently  working  to  seek
down-classification.  AVECOR's  efforts,  in  conjunction  with  those  of other
manufacturers,  are  based  on the  belief  that the  types of blood  reservoirs
currently used in heart/lung  bypass circuits are  significantly  different from
the defoamers used with older, bubble-type oxygenators,  and based on safety and
efficacy  data,  should be  reclassified.  While there can be no assurance  that
these  efforts  will be  successful,  AVECOR  believes  that the  likelihood  of
reclassification  of blood reservoirs is currently greater than indicated in the
FDA order.  Reclassification  data on all of the affected products was submitted
to the FDA for review on February 13, 1998. In the event that any of the devices
are not reclassified, AVECOR and its competitors may be required to submit a PMA
application.  During  the  gathering  and  submission  of data  for any such PMA
application  and throughout the FDA review of this  information,  AVECOR and its
competitors  would most likely be allowed to continue  marketing their products.
As discussed above, the PMA application process can be expensive, uncertain, and
lengthy,  and, if  required,  could have a material  adverse  effect on AVECOR's
future business, financial condition or results of operations.

         AVECOR is also subject to regulation  in each of the foreign  countries
in which it sells its  products  with  regard to  product  standards,  packaging
requirements,  labeling requirements,  import restrictions,  tariff regulations,
duties,  and tax  requirements.  Many of the regulations  applicable to AVECOR's
products in such countries are similar to those of the FDA. The national  health
or social security  organizations of certain of such countries  require AVECOR's
products to be qualified before they can be marketed in those countries.  AVECOR
relies on its  independent  distributors  and AVECOR  regulatory  personnel,  in
countries where AVECOR has employed direct sales  personnel,  to comply with the
majority  of the  foreign  regulatory  requirements.  To  date,  AVECOR  has not
experienced significant difficulty in complying with these regulations.

         AVECOR is subject to periodic  inspections by the FDA, which is charged
with auditing AVECOR's  compliance with quality assurance systems established by
the FDA and other  applicable  government  standards.  AVECOR is also subject to
inspections by the United  Kingdom's  Medical  Devices  Directorate  ("MDD") and
other European regulatory agencies. Strict regulatory action may be initiated in
response  to audit  deficiencies  or to  product  performance  problems.  AVECOR
believes that its manufacturing and quality control procedures are in compliance
with the  requirements of the FDA and MDD  regulations.  AVECOR's  manufacturing
facilities  and processes are also subject to periodic  inspection and review by
BSI in conjunction with AVECOR's ISO 9001 certification.  ISO certification is a
series of standards  that define the basics of  establishing,  documenting,  and
maintaining an effective  production quality management system.  AVECOR believes
that ISO certification creates value for AVECOR both internally, by providing an
objective  criteria  for  measuring  AVECOR's  quality  assurance  efforts,  and
externally,   through  customer   recognition  of,  and  demand  for,   products
manufactured by ISO certified manufacturers.

         BSI is also the "Notified Body" that has verified that AVECOR's quality
certification  procedures conform with the "essential requirements" set forth by
the MDD for the class of  products  produced  by AVECOR.  Conformity  with these
essential  requirements  enables  AVECOR to prepare a Declaration  of Conformity
which supports the placement of the "CE" mark on AVECOR's products.  The CE mark
enables AVECOR's products to be marketed, sold, and used throughout the European
Union  (the  "EU"),  subject  to limited  "safeguard"  powers of member  states.
Beginning in June 1998, all of AVECOR's  products (and those of its competitors)
are required to comply with the essential  requirements  in order to be marketed
in the EU.


<PAGE>

         The financial  arrangements  through which AVECOR markets,  sells,  and
distributes  its  products  may be subject to certain  federal and state laws as
well as  regulations  in the United  States  with  respect to the  provision  of
services or products to patients who are Medicare or Medicaid beneficiaries. The
"fraud and abuse" laws and  regulations  prohibit the knowing and willful offer,
payment or receipt of  anything  of value to induce the  referral of Medicare or
Medicaid   patients  for  services  or  goods.   In  addition,   the   physician
anti-referral  laws  prohibit the referral of Medicare or Medicaid  patients for
certain  "Designated  Health  Services"  to  entities  in  which  the  referring
physician has an ownership or  compensation  interest.  Violations of these laws
and  regulations  may  result  in  civil  and  criminal   penalties,   including
substantial  fines and imprisonment.  In a number of states,  the scope of fraud
and abuse or physician  anti-referral  laws and regulations,  or both, have been
extended to include  the  provision  of  services  or products to all  patients,
regardless of the source of payment,  although  there is variation from state to
state as to the exact  provisions of such laws or regulations.  In other states,
and, on a national  level,  several  health care  reform  initiatives  have been
proposed which would have a similar impact.  AVECOR believes that its operations
and its marketing,  sales,  and distribution  practices  currently comply in all
respects with all current fraud and abuse and physician  anti-referral  laws and
regulations, to the extent they are applicable. Although AVECOR does not believe
that it will need to undertake any  significant  expense or  modification to its
operations or its marketing,  sales, and  distribution  practices to comply with
federal  and  state  fraud and abuse  and  physician  anti-referral  regulations
currently in effect or proposed, financial arrangements between manufacturers of
medical  devices and other health care  providers  may be subject to  increasing
regulation in the future. Compliance with such regulation could adversely affect
AVECOR's marketing,  sales, and distribution practices, and may affect AVECOR in
other  respects  not  presently  foreseeable,  but which  could  have a material
adverse  impact on  AVECOR's  business,  financial  condition,  and  results  of
operations.

Third-Party Reimbursement and Cost Containment

         AVECOR's  products are  purchased by hospitals  and other users,  which
then bill various  third-party  payors for the health care products and services
provided to the  patients.  These  payors,  which  include  Medicare,  Medicaid,
private insurance companies,  and managed care organizations,  reimburse part or
all of the costs and fees  associated  with the procedures  performed with these
devices.

         Medicare and Medicaid  reimbursement  for hospitals is based on a fixed
amount for admitting a patient with a specific diagnosis.  Because of this fixed
reimbursement  method,  hospitals have  incentives to use less costly methods in
treating  Medicare  and  Medicaid  patients,  and will  frequently  make capital
expenditures   to  take  advantage  of  less  costly   treatment   technologies.
Frequently,  reimbursement  is  reduced  to reflect  the  availability  of a new
procedure or technique  and, as a result,  hospitals  are  generally  willing to
implement new cost saving  technologies  before these downward  adjustments take
effect.  Likewise,  because the rate of reimbursement for certain physicians who
perform  certain  procedures  has been, and may in the future be, reduced in the
event of further  changes in the  resource-based  relative value scale method of
payment calculation, physicians may seek greater cost efficiency in treatment to
minimize  any  negative  impact of  reduced  reimbursement.  Any  amendments  to
existing  reimbursement  rules and  regulations  which restrict or terminate the
reimbursement  eligibility  (or the  extent or amount of  coverage)  of  medical
procedures  using AVECOR's  products or the eligibility (or the extent or amount
of  coverage)  of  AVECOR's  products  could have a material  adverse  impact on
AVECOR's business, financial condition, and results of operations.

         In response to the focus of national  attention  on rising  health care
costs,  a number of changes to reduce costs have been  proposed or have begun to
emerge.  There have been, and may continue to be,  proposals by legislators  and
regulators  and  third-party  payors to curb these costs.  There has also been a

<PAGE>

significant  increase  in the  number  of  Americans  enrolling  in some form of
managed  care  plan,  and more  than  80% of  hospitals  participate  in or have
agreements  with  HMOs.  It has  become a  typical  practice  for  hospitals  to
affiliate themselves with as many managed care plans as possible. Higher managed
care  penetration  typically  drives down the prices of health care  procedures,
which in turn places pressure on medical supply prices. This causes hospitals to
implement tighter vendor selection and certification  processes, by reducing the
number of vendors used,  purchasing more products from fewer vendors and trading
discounts on price for guaranteed higher volumes to vendors. Hospitals have also
sought to  control  and  reduce  costs  over the last  decade by  joining  group
purchasing  organizations  or purchasing  alliances.  AVECOR cannot predict what
continuing or future impact existing or proposed legislation, regulation or such
third-party payor measures may have on its future business,  financial condition
or results of operations.

         Because the  primary  application  of AVECOR's  products is in coronary
bypass   procedures,   changes  in  reimbursement   policies  and  practices  of
third-party  payors  with  respect  to  coronary  bypass  surgery  could  have a
substantial and material adverse impact on sales of AVECOR's  heart/lung  bypass
products. The development or increased use of more cost-effective treatments for
coronary   artery   disease   could  cause  such  payors  to  decrease  or  deny
reimbursement for coronary bypass surgery or to favor these other treatments.

Patents and Proprietary Rights

         AVECOR  protects its technology by filing patent  applications  for the
patentable  technologies  that it considers  important to the development of its
business.  AVECOR also  relies  upon trade  secrets,  know-how,  and  continuing
technological innovations to develop and maintain its competitive position.

         AVECOR  currently  holds eight U.S.  patents and has three pending U.S.
patent  applications.  In  addition,  AVECOR has eight  pending  foreign  patent
applications.  Four of AVECOR's  present U.S. patents cover  significant  design
features of the Affinity oxygenator, including the Affinity oxygenator's winding
mandrel,  graduated  density fiber bundle,  and heat exchanger  water  diverter.
AVECOR's  other issued U.S.  patents  cover the designs of the  Affinity  venous
blood  reservoirs  and  Affinity  arterial  filter.  Also,  AVECOR owns a patent
relating to the use of its  silicone  membrane  for cell  culture  applications.
AVECOR has pending U.S. patent  applications  relating to additional features of
the Affinity  venous blood  reservoir,  the Affinity  arterial  filter,  and its
improved  MYOtherm XP  cardioplegia  heat  exchanger.  AVECOR's  pending foreign
patent  applications  consist of selected  overseas filings  addressing the same
intellectual property addressed by AVECOR's issued and pending U.S. patents.

         The three U.S. patents acquired by AVECOR from the Predecessor Business
cover AVECOR's solid silicone membrane oxygenator product line and have expired.
AVECOR believes that the market for solid silicone  membrane  oxygenators  might
not be large  enough to justify the expenses  associated  with market entry by a
competitor,  and therefore, the effect of the expiration of these patents on the
revenues of AVECOR will not be material.

         AVECOR,  like other firms that engage in the  development and marketing
of medical  technology  products,  must  address  issues and risks  relating  to
patents  and trade  secrets.  There  can be no  assurance  that any of  AVECOR's
pending or future  U.S.  or foreign  patent  applications  will result in issued
patents,  that any current or future U.S. or foreign  patents of AVECOR will not
be challenged or  circumvented  by competitors  or others,  or that such patents
will be found to be valid or sufficiently  broad to protect AVECOR's  technology
or provide  AVECOR with its desired  competitive  advantage.  The  validity  and
breadth of claims covered in medical  technology  patents  involve complex legal
and factual  questions  and  therefore  may be highly  uncertain.  AVECOR may be
required  to  institute  litigation  to enforce  patents  issued to AVECOR or to
determine the  enforceability,  scope, and validity of the proprietary rights of
others.


<PAGE>

         AVECOR also relies on trade  secrets and  proprietary  know-how that it
seeks to protect,  in part, through  confidentiality  agreements with employees,
consultants and other parties.  There can be no assurance that these  agreements
will not be breached, that AVECOR will have adequate remedies for any breach, or
that AVECOR's trade secrets will not otherwise  become known to or independently
developed by competitors.

         Claims by  competitors  and other third parties that AVECOR's  products
allegedly  infringe the patent  rights of others  could have a material  adverse
effect on AVECOR.  The medical device industry is  characterized by frequent and
substantial  intellectual property litigation.  Intellectual property litigation
is complex and  expensive,  and the outcome of such  litigation  is difficult to
predict.

         In March  1997,  AVECOR  filed a suit in U.S.  District  Court  for the
District of Minnesota,  seeking to invalidate a newly issued U.S. patent held by
Minntech Corporation ("Minntech"), a competing manufacturer of blood oxygenators
and other medical devices, and requesting a determination that AVECOR's Affinity
oxygenator  does not  infringe  the  Minntech  patent.  AVECOR filed the suit in
response to a December  1996 letter from  Minntech,  alleging  that the Affinity
oxygenator  infringes  certain claims under  Minntech's  patent,  and requesting
discussion  regarding  a possible  license  agreement.  On October 6, 1997,  the
Magistrate  Judge of the United States  District  Court vacated a previous order
and granted a stay in the  proceedings,  including the  suspension of discovery,
pending the outcome of Minntech's  request for re-issuance of the aforementioned
patent.

         AVECOR's action against Minntech and any future litigation,  regardless
of  outcome,  could  result in  substantial  expense to AVECOR  and  significant
diversion of the efforts of AVECOR's  technical  and  management  personnel.  In
addition,  if Minntech were  successfully to bring an infringement  counterclaim
against AVECOR,  or if AVECOR were to be subject to an adverse  determination in
any other legal  proceeding in the future alleging patent  infringement,  AVECOR
could become subject to an injunction preventing the manufacture and sale of the
infringing  products  and to  monetary  damages,  or might be  forced  to seek a
license  from the party  alleging  patent  infringement  in order to continue to
manufacture  and sell any  infringing  products,  which it might  not be able to
obtain.  The outcome of any such legal  action,  including  the  possibility  of
entering into such a license,  could have a material  adverse effect on AVECOR's
business, financial condition, and results of operations.

         Pursuant  to an Asset  Purchase  Agreement  dated June 7, 1991  ("Asset
Purchase  Agreement"),  for  approximately $1 million in cash and a $2.5 million
note, AVECOR acquired the business and assets, and assumed certain  liabilities,
of the Predecessor Business. In addition, under the terms of a Royalty Agreement
also dated June 7, 1991  ("Royalty  Agreement"),  AVECOR is  obligated to pay to
SCIMED Life Systems,  Inc. ("SCIMED")  specified royalties based on a percentage
of net sales (as defined) of products previously manufactured by the Predecessor
Business and future products developed from  then-existing  technology if AVECOR
achieves certain net sales thresholds with those products. The Royalty Agreement
also  provides  for royalty  payments on certain new  generations  of  developed
products,  if any,  that use certain  technology  embodied in the  then-existing
models of such  products.  In June 1996,  the  Royalty  Agreement  expired  with
respect to products  previously  manufactured  by the  Predecessor  Business and
expires with respect to current  products  under  development at the time of the
acquisition and certain new generation products in June 2001. AVECOR has charged
$95,000 in 1996 and $178,000 in 1995 to  operations  for royalties due under the
Royalty  Agreement  for  sales  of  products  previously   manufactured  by  the
Predecessor  Business.  No  related  royalty  amounts  accrued  in 1997.  AVECOR
believes  that none of the  products  in the  Affinity  line nor any of AVECOR's
products  currently under development  (including the products with the Trillium
coating applied) will require royalty payments under the Royalty Agreement.


<PAGE>

         In connection with the Asset Purchase  Agreement,  SCIMED also assigned
to AVECOR 10 trademarks (one of which is registered) related to AVECOR's current
line of products previously manufactured by the Predecessor Business.

         AVECOR  also  entered  into a  royalty  agreement  in  connection  with
AVECOR's  acquisition of an exclusive license to market the Affinity blood pump.
The agreement  requires  AVECOR to make payments  based on net sales of the pump
chamber  (the  disposable  portion of the  Affinity  blood pump  system) and net
profits of the pump console (the  equipment  portion of the Affinity  blood pump
system) through August 2002. The term of the agreement may be extended by AVECOR
until  the  expiration  of the last to  expire of the  patents  covered  by this
agreement or the useful life of the know-how (as defined) licensed, whichever is
longer.  Under the terms of the  agreement,  AVECOR is  required  to pay minimum
royalties  each year.  AVECOR  incurred  royalties of $55,000 for the year ended
December 31,  1997,  which amount  exceeded the minimum  royalty  related to the
first year of the royalty agreement.

         AVECOR also has use of an  exclusive  license  allowing it to apply its
Trillium  bio-passive surface to its products.  The agreement requires AVECOR to
make quarterly payments based on a percentage of net sales of products utilizing
the bio-passive surface. AVECOR can retain exclusivity of the license if it pays
minimum  annual  royalties.  AVECOR  incurred  royalties of $35,000 for the year
ended December 31, 1997 under this agreement.

Employees

         As  of  December  31,  1997,  AVECOR  employed  339  persons  full-time
including 29 in research and development, 223 in manufacturing,  53 in sales and
marketing,  and 34 in general and administrative  functions.  AVECOR's employees
are not represented by a union, and AVECOR  considers its relationship  with its
employees to be good.


<PAGE>


                 SELECTED CONSOLIDATED FINANCIAL DATA OF AVECOR
                      (In thousands, except per share data)

         The selected consolidated  financial data as of and for the years ended
December 31,  1993,  1994,  1995,  1996 and 1997 of AVECOR has been derived from
financial   statements  of  AVECOR   audited  by   PricewaterhouseCoopers   LLP,
independent  accountants,  and should be read in conjunction with  "Management's
Discussion  and Analysis of Financial  Condition  and Results of  Operations  of
AVECOR" included elsewhere in this Proxy Statement/Prospectus.

         The selected unaudited  consolidated  financial data presented below as
of and for the six-month periods ended June 30, 1997 and 1998 have been prepared
by AVECOR and are derived from the unaudited  consolidated  financial statements
of   AVECOR   included   and   incorporated   by   reference   in   this   Proxy
Statement/Prospectus.  In the  opinion of  AVECOR's  management,  the  unaudited
interim consolidated  financial  statements include all adjustments  (consisting
only of normal recurring  adjustments)  necessary for a fair presentation of the
consolidated  operating  results and financial  position of AVECOR as of and for
the unaudited  periods described above. The results of operations for AVECOR for
the six-month  period ended June 30, 1998 are not necessarily  indicative of the
results of  operations  that may be expected  for the entire  fiscal year ending
December 31, 1998.


<TABLE>
<CAPTION>


                                               Six months ended
                                                   June 30                           Years ended December 31
                                             ----------------------     -----------------------------------------------------------
                                              1998          1997         1997       1996         1995           1994         1993
                                             --------      --------     -------    --------     --------       -------     --------
                                                 (Unaudited)
<S>                                           <C>           <C>         <C>         <C>          <C>           <C>          <C>    
Operating Data:
   Net sales............................      $26,021       $24,004     $46,864     $44,401      $33,340       $21,486      $14,125
   Cost of sales........................       15,437        13,960      27,574      25,986       18,180        12,556        9,067
                                             --------      --------     -------    --------     --------       -------     --------
                                                                       
      Gross profit......................       10,584        10,044      19,290      18,415       15,160         8,930        5,058
   Operating Expenses:
      Selling, general and administrative       7,883         6,832      13,428      11,885        8,727         6,779        5,044
      Litigation expense................         ----          ----        ----       4,205          170          ----         ----
      Research and development..........        1,726         2,076       3,902       3,651        2,773         2,309        1,891
                                             --------      --------     -------    --------     --------       -------     --------
         Operating income (loss)........          975         1,136       1,960     (1,326)        3,490         (158)      (1,877)
   Interest income......................          164           273         495         725          586           143          204
   Interest expense.....................          199           176         383        ----        ----           ----         ----
                                             --------      --------     -------    --------     --------       -------     --------
   Income (loss) before income taxes....          940         1,233       2,072       (601)        4,076          (15)      (1,673)
   Income tax provision (benefit).......          310           443         745        (34)          780            24         (23)
                                             --------      --------     -------    --------     --------       -------     --------
   Net income (loss)....................     $    630     $     790    $  1,327   $   (567)      $ 3,296      $   (39)    $ (1,650)
                                             ========     =========    ========    ========      =======      ========    =========
   Diluted earnings (loss) per share....         $.08          $.10        $.17      $(.07)         $.45        $(.01)       $(.26)
                                            =========     =========    ========    ========      =======      ========    =========
   Weighted average common and common ..
equivalent shares outstanding(1)........        8,029         7,979       7,990       7,767        7,353         6,390        6,361
                                            =========     =========    ========    ========      =======      ========    =========


Balance Sheet Data:
   Working capital......................      $19,974       $19,776     $20,204     $20,563      $26,247       $10,150      $ 9,725
   Total assets.........................       46,049        44,363      42,759      37,161       33,519        15,877       15,031
   Long-term debt.......................        4,632         4,823       4,694        ----         ----          ----         ----
   Shareholders' equity.................      $33,445        31,350      32,618      29,938       29,322        13,145       12,970
</TABLE>

(1)  Weighted  average  common  and common  equivalent  shares  outstanding  are
calculated  according  to the  definitions  of "diluted  earnings  per share" as
defined by the  Financial  Accounting  Standards  Board  (FASB) in  Statement on
Financial  Accounting  Standards  No.  128,  "Earnings  per  Share." All periods
presented were prepared under this standard for computing earnings per share.


<PAGE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
             FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF AVECOR


         The  following  is a  discussion  of  the  results  of  operations  and
financial  condition of AVECOR and should be read in  conjunction  with AVECOR's
Consolidated  Financial Statements and Notes thereto appearing elsewhere in this
Proxy Statement/Prospectus. The discussion set forth below reflects management's
discussion  of  historical  results  and  trends  in  the  business,   financial
condition,  and results of  operations of AVECOR for periods prior to the public
announcement  of the Merger.  There can be no assurance that AVECOR's  business,
financial condition, and results of operations will not be adversely impacted as
a result of the announcement of the Merger and, in particular, the effect of the
announcement on AVECOR's  ability to sell its products  through its distributors
and sales representatives.

Results of Operations

Comparison  of the Six Months Ended June 30, 1998 with the Six Months Ended June
30, 1997

         Net Sales.  Net sales  increased 8% to  $26,021,000  for the six months
ended June 30, 1998 from  $24,004,000  for the six months  ended June 30,  1997.
This increase was  primarily the result of a higher volume of product  shipments
of AVECOR's  Signature  custom tubing pack line,  Affinity line and the MYOtherm
cardioplegia  line. AVECOR received FDA marketing  approval for its new Affinity
blood pump  system in August  1997 and the  MYOtherm  XP  cardioplegia  delivery
system in July 1997. These products positively  influenced the comparative sales
growth.  Overall,  average prices of product  shipments  declined  slightly when
compared to the  corresponding  period in 1997,  principally  due to competitive
pressures.

         Sales from the  Signature  custom  tubing  pack,  Affinity and MYOtherm
cardioplegia lines increased approximately $789,000 (16.5%), $784,000 (5.8%) and
$269,000  (13.8%),  respectively,  during the six months  ended June 30, 1998 as
compared to the corresponding period in 1997.

         During the third quarter of 1997, AVECOR terminated agreements with its
last  remaining  United States  distributor  and its only Canadian  distributor.
These markets are now being served by AVECOR's direct sales force.  Sales in the
territories formerly represented by these distributors  increased  approximately
$1,200,000  in the six month  period  ended  June 30,  1998 as  compared  to the
corresponding period in 1997. AVECOR cannot be certain whether revenues in these
territories will be maintained, improve or decline.

         Sales  to  customers   located   outside  of  the  United  States  were
approximately  40% and 41% of net sales for the six month periods ended June 30,
1998 and 1997,  respectively.  Sales to customers  located outside of the United
States  could be  adversely  impacted  in  future  periods  as a  result  of the
announcement  of the  Merger  and the effect of that  announcement  on  AVECOR's
relationships with its distributors and sales representatives.

         AVECOR  has  continued  to  experience   decreased  sales  to  contract
perfusion  groups  controlled by certain of its  competitors.  Sales to contract
perfusion groups controlled by one of AVECOR's competitors decreased $458,000 to
$258,000 for the six months ended June 30, 1998 from $716,000 for the six months
ended June 30, 1997.  AVECOR believes that control of contract  perfusion groups
by its competitors  will continue to have a negative impact on AVECOR's  ability
to market its products to such groups or to hospitals or other medical providers

<PAGE>

that contract with  competitor-controlled  groups for  perfusion  services,  and
could have a material adverse effect on AVECOR's business,  financial  condition
and  results of  operation.  This  forward-looking  statement  is subject to the
degree of control  exerted by AVECOR's  competitors  with respect to  purchasing
decisions  made by  controlled  groups of  perfusionists,  the  extent of future
acquisitions of contract perfusion groups by AVECOR's  competitors,  the breadth
of AVECOR's product offerings relative to those competitors controlling contract
perfusion groups,  and the degree to which AVECOR's research and development and
marketing  efforts result in the successful  commercialization  of products with
enhanced or superior performance characteristics.

         Cost of Sales/Gross  Profit.  Gross profit as a percentage of net sales
decreased  1.1% to 40.7% for the six months  ended June 30,  1998 from 41.8% for
the six  months  ended  June 30,  1997.  The  gross  profit  percentage  for the
six-month  period ended June 30, 1998 was  unfavorably  impacted by  significant
increases in sales of AVECOR's lower-margin Signature custom tubing pack line as
well as competitive  pricing  pressures in the marketplace.  The mix of products
sold in any period  will  influence  the cost of sales and gross  profit for the
period.  Gross  margins  during  the six months  ended  June 30,  1998 were also
negatively  impacted by lower production volumes  experienced late in the fourth
quarter of 1997 which continued into the first quarter of 1998.

         Affinity   oxygenator   product  costs  continued  to  decline  due  to
efficiency  and material cost  improvements,  although these  improvements  were
largely offset by an ongoing decrease in average selling prices.

         AVECOR's future gross profit margin  percentages  will be influenced by
the ongoing  pressures of the competitive  pricing  environment,  changes in the
sales mix, the required levels of production,  new product introductions and the
extent of further  product cost  improvements  through  increased  manufacturing
efficiencies   and  reduced  material  costs,  if  any.  Given  the  uncertainty
associated with new product introductions,  the ultimate realization of any such
product cost  improvements and the continuing price pressures  characteristic of
AVECOR's  markets,  AVECOR  cannot be certain if its gross profit margin will be
maintained, improve or decline.

         Selling,  General and  Administrative  Expenses.  Selling,  general and
administrative  expenses  increased 15% to  $7,883,000  for the six months ended
June 30,  1998 from  $6,832,000  for the six months  ended June 30,  1997.  This
increase  is  primarily  attributed  to costs  associated  with  the  continuing
development of a direct sales force in certain of AVECOR's  territories formerly
served by distributors and independent  sales  representatives,  marketing costs
incurred for the  introduction  of new products,  including  the Affinity  blood
pump, and increased seasonal trade show costs. Various costs associated with the
acquisition of AVECOR also  contributed to the incremental  increase in selling,
general and  administrative  expenses during the six-month period ended June 30,
1998 as compared  to the  corresponding  period in 1997.  As a percent of sales,
selling,  general  and  administrative  expenses  increased  to  30.3%  for  the
six-month  period ended June 30, 1998 from 28.5% for the six-month  period ended
June 30, 1997.

         Without considering the impact of the acquisition of AVECOR, management
anticipates that selling,  general and administrative  expenses for 1998 will be
higher  than 1997 and will  approximate  1997 levels as a  percentage  of sales.
These  forward-looking  statements  will  be  influenced  by  revenue  increases
achieved by AVECOR,  its ability to attract and retain qualified sales personnel
as AVECOR continues to develop its direct sales force, and the timing and extent
of promotional  activities associated with the Affinity oxygenator with Trillium
bio-passive surface, the new oxygen saturation/hematocrit  monitor and other new
product introductions, if any.


<PAGE>

         Research and Development  Expenses.  Research and development  expenses
decreased  17% to  $1,726,000  for the six  months  ended  June  30,  1998  from
$2,076,000 for the six month period ended June 30, 1997. This decreased spending
is a result of the transition  from the  completion or near  completion of major
projects  including  the  Affinity  blood  pump,  MYOtherm  XP and the  Affinity
oxygenator  with Trillium  bio-passive  surface to a new  generation of products
including the new oxygen saturation/hematocrit monitor.

         Without considering the impact of the acquisition of AVECOR, management
anticipates  that research and  development  expenses for 1998 will  approximate
1997 levels,  as AVECOR  continues to expand and improve its proprietary line of
disposable medical devices.  This  forward-looking  projection is dependent upon
the  extent  and  timing  of new  product  development  and  the  impact  of the
regulatory process in obtaining marketing clearance for new products,  including
the new oxygen  saturation/hematocrit device which was submitted for approval to
the FDA near the end of the second  quarter of 1998,  and the extent of expenses
related to  research  studies  commenced  in an  attempt  to prove the  clinical
efficacy and, thus, market advantage of the Trillium coating. The need or desire
to modify AVECOR's  existing products could also influence the level of research
and  development  expenses.  There can be no assurance,  however,  that AVECOR's
research  and  development  efforts  will  result in any  additional  regulatory
submissions to the FDA or will result in any commercially  successful  products.
The forward-looking  statements  regarding  anticipated  regulatory  submissions
contained  in this  paragraph  will  be  impacted  by the  results  of  AVECOR's
development efforts, the availability of any required clinical data, any changes
in the regulatory scheme for such products,  and AVECOR's assessment of the cost
and anticipated benefit of such submissions.

         Interest Income and Expense.  Interest income decreased to $164,000 for
the six months  ended June 30, 1998 from  $273,000 for the six months ended June
30, 1997.  This decrease in interest  income is primarily due to the use of cash
and cash equivalents and investments for the purchase of manufacturing molds and
equipment and additional inventories needed to support AVECOR's new products and
revenue  growth.  At June 30,  1998,  the  majority  of  AVECOR's  cash and cash
equivalents was invested with two investment  portfolio managers who invested in
bank certificates of deposit,  U.S. government  securities,  agency paper, money
markets, commercial paper, and corporate obligations.

         Interest  expense  for the  six-month  period  ended June 30,  1998 was
$199,000  compared to $176,000 for the six-month period ended June 30, 1997. The
interest expense was exclusively due to the mortgage on AVECOR's U.S.  facility.
The closing on the facility purchase occurred in late January 1997.

         Income Tax Provision.  For the six-month  period ended June 30, 1998, a
tax  provision of $310,000 was recorded  compared to $443,000 for the  six-month
period ended June 30, 1997. The tax provisions recorded correspond to the pretax
income for those  respective  periods.  These provisions vary from the statutory
U.S. federal  corporate rate primarily due to losses incurred by AVECOR's French
subsidiary for which no tax benefit has been  recognized  because of uncertainty
of   realization,   partially   offset  by  the   generation   of  research  and
experimentation credits.

         Net Income.  Net income was  $630,000  or $.08 per share,  on a diluted
basis,  for the  six-month  period ended June 30, 1998,  compared to $790,000 or
$.10 per share,  on a diluted  basis,  for the six- month  period ended June 30,
1997.


<PAGE>

Comparison of the Year Ended  December 31, 1997 with the Year Ended December 31,
1996

         Net  sales.  Net  sales  increased  6% to  $46,864,000  for  1997  from
$44,401,000  for 1996.  This  increase  was  principally  the result of a higher
volume of product  shipments  of  AVECOR's  Signature  custom  tubing  packs and
Affinity product line.  Overall,  average prices of product  shipments  declined
slightly when compared to 1996.

         Signature  custom  tubing pack and the Affinity  product line net sales
increased $2,401,000 and $697,000 from 1996, respectively. A significant portion
of the Affinity revenue increase was attributed to the Affinity blood pump which
AVECOR  began  marketing  internationally  in June  1997.  AVECOR  received  FDA
marketing  approval  for this  product  in August  1997.  These  increases  were
partially  offset by decreases in the silicone  membrane  oxygenator  line which
decreased  by $436,000  and the MYOtherm  cardioplegia  line which  decreased by
$339,000.  Management  believed  the  decline  in  net  sales  of  the  MYOtherm
cardioplegia line was temporary as customers delayed their purchasing  decisions
in  anticipation  of  AVECOR's  launch  of  its  new  version  of  the  MYOtherm
cardioplegia  system (MYOtherm XP). As noted above, the MYOtherm XP cardioplegia
system received  marketing  clearance from the FDA in July 1997 and was launched
both in the United States and internationally in early 1998.

         Sales  to  customers   located   outside  of  the  United  States  were
approximately 41% of consolidated net sales for 1997 and 1996.

         During the third quarter of 1997, AVECOR terminated agreements with its
last  remaining  United States  distributor  and its only Canadian  distributor.
Sales in the territories  formerly  represented by these distributors  decreased
approximately  $1,400,000 in 1997 when  compared to 1996.  These markets are now
being  served by AVECOR's  direct sales  force.  Management's  belief that these
revenue  declines were  temporary and caused by the transition to a direct sales
force in these  territories  and the  depletion  of product  inventories  of the
former distributors is supported by the previously mentioned $1,200,000 increase
in sales in these  territories  for the  six-month  period  ended June 30,  1998
compared to the same period in 1997.

         Although  revenues  from  distributors  in  the  continental   European
countries  and Asia  increased  about  $800,000  during the twelve  months ended
December  31, 1997 when  compared  to the  corresponding  period in 1996,  these
distributors'  sales for the six-month  period ended December 31, 1997 decreased
approximately  $690,000 when compared to the six-month period ended December 31,
1996 and decreased  about  $983,000 when compared to the six-month  period ended
June 30,  1997.  During the latter half of 1997,  currencies  in Europe and Asia
substantially  weakened relative to the U.S. dollar and the U.K. pound sterling.
AVECOR  believes that these types of  fluctuations  in currency  exchange  rates
reduce demand for AVECOR's products by increasing the price of AVECOR's products
in the currency of the countries in which the product is sold.

         Sales to AVECOR's formerly exclusive Mexican distributor declined about
$340,000 in 1997 when compared to 1996. On October 9, 1997,  AVECOR entered into
an agreement with St. Jude Medical to distribute AVECOR's products in Mexico and
in  Central  and  South  America.  Previous  sales in these  countries  were not
significant to AVECOR. The formerly exclusive Mexican  distributor  continues to
market AVECOR's silicone membrane product line in Mexico.

         The  aforementioned  factors  impacted  sales  within  all of  AVECOR's
product lines.  The revenue  declines  discussed  above were exceeded by revenue
growth in AVECOR's other domestic and foreign markets.


<PAGE>

         Sales  to  contract  perfusion  groups  controlled  by one of  AVECOR's
competitors decreased $750,000 to $1,100,000 for 1997 from $1,850,000 for 1996.

         Cost of Sales/Gross  Profit.  Gross profit as a percentage of net sales
decreased  to 41.2% for 1997 from 41.5% for 1996.  The cost of sales  percentage
for 1997 was unfavorably impacted by significant  increases in sales of AVECOR's
lower-margin  Signature custom tubing pack line, as well as competitive  pricing
pressures  in the  marketplace.  The mix of  products  sold in any  period  will
influence the cost of sales and gross profit for the period.

         Affinity oxygenator costs continued to improve due to material cost and
efficiency  improvements,  although these improvements were largely offset by an
ongoing  decrease  in average  selling  prices and  reduced  production  volume,
primarily in the fourth quarter, due to lower-than-expected sales volume.

         Selling, General and Administrative,  and Litigation Expense.  Selling,
general and  administrative  expenses increased 13% to $13,428,000 for 1997 from
$11,885,000 for 1996. This increase is primarily  attributed to costs associated
with the  continuing  development of a direct sales force in certain of AVECOR's
territories    formerly   served   by   distributors   and   independent   sales
representatives  and  costs  incurred  for  the  introduction  of new  products,
including the Affinity blood pump. As a percent of sales,  selling,  general and
administrative expenses increased to 28.7% for 1997 from 26.8% for 1996.

         On July 17, 1996,  AVECOR reached an agreement  with COBE  Laboratories
Inc.  (COBE) to settle  COBE's  patent  suit  against  AVECOR.  The terms of the
settlement  with  COBE  provided  for  AVECOR  to  make  net  payments  totaling
$2,200,000.  Two net payments of $1,100,000  were made in August 1996 and August
1997,  respectively.  AVECOR recorded settlement costs and professional expenses
of approximately $4,205,000 in 1996 in connection with the COBE suit. No related
expenses were incurred for the COBE matter in 1997.

         Research and Development  Expenses.  Research and development  expenses
increased 7% to $3,902,000  for 1997 from  $3,651,000  for 1996.  This increased
research and  development  spending is a result of AVECOR's  ongoing  efforts to
pursue a number of potential and realized  product  opportunities  including the
MYOtherm  XP,  Affinity  blood  pump,  the  Affinity  oxygenator  with  Trillium
bio-passive  surface  and new oxygen  saturation/hematocrit  technology.  AVECOR
received the appropriate  marketing clearances from the FDA for the MYOtherm XP,
Affinity blood pump and Affinity oxygenator with Trillium bio-passive surface in
July 1997, August 1997 and February 1998, respectively.

         Interest.  Interest income decreased to $495,000 for 1997 from $725,000
for 1996.  This decrease in interest  income is primarily due to the use of cash
and cash equivalents and investments for AVECOR's new facility,  the purchase of
manufacturing  molds and  equipment,  additional  inventories  needed to support
AVECOR's new product lines and revenue growth, and the costs associated with the
COBE matter.  Interest income during 1997 and 1996 was earned primarily from the
investment of the remaining net proceeds from AVECOR's June 1995 stock offering.
At December 31, 1997, the majority of these remaining net proceeds were invested
with  two  investment   portfolio  managers  who  invested  in  U.S.  government
securities,   agency  paper,  money  markets,  commercial  paper  and  corporate
obligations.

         Interest  expense  for 1997 was  $383,000  and  exclusively  due to the
mortgage on the new facility.  The closing on the facility  purchase occurred in
late January 1997.


<PAGE>

         Income  Tax  Provision.  For 1997,  a tax  provision  of  $745,000  was
recorded as  compared  to a tax  benefit of $34,000 for 1996.  The 1997 and 1996
effective tax rates differ from the normal U.S. statutory tax rate primarily due
to losses  incurred by AVECOR's  French  subsidiary for which no tax benefit has
been recognized  because of uncertainty of realization  partially  offset by the
generation of research and experimentation credits.

         Net Income (Loss).  Net income was  $1,327,000 or $.17 per share,  on a
diluted basis, for 1997 compared to net loss of $567,000 or $.07 per share, on a
diluted  basis,  for 1996.  The 1996 loss is  primarily  due to  litigation  and
settlement  expense  incurred  during 1996 in connection  with the COBE lawsuit,
which resulted in a charge to operations of $4,205,000.

Comparison of the Year Ended  December 31, 1996 with the Year Ended December 31,
1995

         Net  sales.  Net  sales  increased  33% to  $44,401,000  for 1996  from
$33,340,000  for 1995.  This  increase  was  principally  the result of a higher
volume of product  shipments of AVECOR's  Affinity  product  line and  Signature
custom  tubing  packs.  Overall,  average  prices  associated  with 1996 product
shipments  declined  slightly  from  those of 1995 in  response  to  competitive
pricing in the  marketplace.  Selective price increases were  implemented in the
last half of 1996.

         Sales from the Affinity  product line and Signature custom tubing packs
increased  $7,159,000  and  $3,943,000  from 1995,  respectively.  The favorable
impact of increased net sales of these  product lines was partially  offset by a
decrease  of $276,000 in net sales of  AVECOR's  older solid  silicone  membrane
oxygenator product line.

         Cost of Sales / Gross Profit. Gross profit as a percentage of net sales
decreased  to 41.5% for 1996 from 45.5% for 1995.  The cost of sales  percentage
for 1996 was unfavorably impacted by significant  increases in sales of AVECOR's
lower-margin  Signature custom tubing pack line, as well as competitive  pricing
pressures in the marketplace.

         Higher  production  volumes  continued to improve  Affinity  oxygenator
product costs, although these improvements were offset,  primarily by an ongoing
decrease in average selling prices due to AVECOR being in a competitive  pricing
environment.  Also, optimal volume-related  manufacturing  efficiencies were not
achieved  throughout 1996 for production of AVECOR's  Affinity  arterial filter.
Production of the Affinity arterial filter began on or about December 31, 1995.

         Selling,  General and Administrative and Litigation  Expense.  Selling,
general and  administrative  expenses increased 36% to $11,885,000 for 1996 from
$8,727,000 for 1995.  This increase is attributed to costs  associated  with the
development of a direct sales force in certain of AVECOR's  territories formerly
served by distributors  and independent  sales  representatives  and the overall
increase in support needed to achieve AVECOR's sales levels.  In connection with
AVECOR's  development of a direct sales force, in October 1995,  AVECOR opened a
sales  office in France  from which it fields a direct  sales force to serve the
French market.  AVECOR recorded  non-recurring  charges in the fourth quarter of
1996  associated with  relocation and lease  abandonment  expenses in connection
with the  consolidation of AVECOR's U.S.  operations from four leased facilities
into one owned property and the addition and  subsequent  resignation of a Chief
Operating Officer.

         Additionally, AVECOR recorded settlement costs and professional fees of
$4,205,000 in 1996, in  connection  with the COBE suit,  compared to $170,000 in
1995.


<PAGE>

         Research and Development  Expenses.  Research and development  expenses
increased 32% to $3,651,000 for 1996 from  $2,773,000  for 1995.  This increased
research and development  spending was a result of AVECOR's  efforts to pursue a
number of potential product opportunities, including the Affinity blood pump.

         Interest  Income.  Interest income  increased to $725,000 for 1996 from
$586,000 for 1995.  Interest  income  during 1996 and 1995 was earned  primarily
from the  investment of the remaining net proceeds from AVECOR's June 1995 stock
offering. At December 31, 1996, the majority of these remaining net proceeds was
invested with two investment  portfolio managers who invested in U.S. government
securities,  agency  paper,  money  markets,  commercial  paper,  and  corporate
obligations.

         Income Tax  Provision.  For 1996, a tax benefit of $34,000 was recorded
as compared to a tax provision of $780,000 for 1995. The 1996 effective tax rate
differs from the normal  statutory tax rate primarily due to losses  incurred by
AVECOR's French subsidiary for which no tax benefit has been recognized  because
of uncertainty of realization partially offset by the generation of research and
experimentation credits. The 1995 tax provision reflects an effective rate which
benefited from use of previously  generated net operating loss carryforwards and
research and experimentation credits.

         Net  Income  (Loss).  Net loss was  $567,000  or $.07 per  share,  on a
diluted basis,  for 1996 compared to net income of $3,296,000 or $.45 per share,
on a diluted basis,  for 1995. The 1996 loss was primarily due to litigation and
settlement  expense  incurred  during 1996 in connection  with the COBE lawsuit,
which resulted in a charge to operations of $4,205,000.

Liquidity and Capital Resources

         For the six months ended June 30, 1998,  AVECOR's operating  activities
provided  net cash of  $2,848,000  compared  to $479,000  provided by  operating
activities  for the same  period  in 1997.  Net  income  after  adjustments  for
depreciation  and amortization was $294,000 greater in the six months ended June
30, 1998 as compared to the same period in 1997. The net change of approximately
$2,369,000  is  primarily  the result of  increased  accounts  payable  balances
principally due to the timing of check runs and increased accrued expenses,  and
smaller  increases in inventories  and accounts  receivable when compared to the
six months ended June 30, 1997.  These net sources of cash were partially offset
by the use of cash for  increased  other  current  assets  during the six months
ended June 30, 1998.

         During 1997, AVECOR used $891,000 in operating  activities  compared to
$2,470,000  used for operating  activities in 1996. The net change of $1,579,000
is primarily  the result of $3,100,000 of cash usages during 1996 related to the
COBE  litigation  compared to  $1,100,000  of cash usages  during 1997,  smaller
increases in levels of inventories and reduced prepaid expenses. These operating
provisions  for cash were  partially  offset by a smaller  increase  in  accrued
expenses in 1997 when compared to 1996,  reduced  accounts payable and increased
accounts receivable balances in 1997 when compared to 1996. AVECOR's inventories
continued to increase as a result of inventories  needed to support AVECOR's new
product  lines,  revenue  growth  and,  in  part,  as a  result  of  lower  than
anticipated  shipments of the Affinity  product line  primarily in the third and
fourth quarters of 1997.

         AVECOR  believes  that  its  existing  cash and  cash  equivalents  and
investments  as well as  anticipated  cash  generated  from  operations  will be
sufficient to satisfy AVECOR's cash requirements for the foreseeable future.


<PAGE>

         Cash expenditures for capital additions totaled  $2,090,000 for the six
months ended June 30, 1998 compared to $1,911,000  for six months ended June 30,
1997 when excluding the 1997 cash  expenditures  for AVECOR's U.S.  facility and
related  furniture,  fixtures and equipment.  These  expenditures were primarily
related  to  equipment,  molds and  tooling  necessary  to  further  production,
increase production efficiencies,  improve quality and reduce raw material costs
of the Affinity blood pump,  MYOtherm XP and the Affinity oxygenator and related
blood reservoirs.  The investment in equipment for the six months ended June 30,
1998 includes  $300,000  related to the Affinity blood pump. This pump equipment
is placed with  customers  in exchange  for a long-term  commitment  to purchase
disposable products from AVECOR.

         For 1997,  cash  expenditures  for  capital  additions,  other than the
purchase of the new facility  and related  furniture,  fixtures  and  equipment,
totaled  $4,628,000  compared to $1,979,000  in 1996.  These  expenditures  were
primarily  related  to  equipment,  molds  and  tooling  necessary  to begin the
production and marketing of the Affinity blood pump and MYOtherm XP, and to also
increase  production  efficiencies and reduce raw material costs of the Affinity
oxygenator  and related blood  reservoirs.  The investment in equipment for 1997
included  $1,494,000  related to the Affinity blood pump. This pump equipment is
placed  with  customers  in  exchange  for a  long-term  commitment  to purchase
disposable  products from AVECOR.  During 1997, the  expenditures for furniture,
fixtures and  equipment  additions  related to AVECOR's new U.S.  manufacturing,
research  and  development  and   administrative   facility  were  approximately
$760,000.

         Leases for AVECOR's U.S. manufacturing,  research and development,  and
administrative  facilities expired on December 31, 1996. In January 1997, AVECOR
consolidated  its four separate  facilities into a newly  constructed  facility,
which  AVECOR  has  purchased.  The  cost of  this  facility  was  approximately
$8,600,000,  plus  approximately  $1,050,000  for  the  purchase  of  furniture,
fixtures and manufacturing equipment for the facility. To finance the $9,650,000
total cost of the project,  AVECOR  entered into a $5,167,000  bank note payable
agreement  in January 1997 and, in addition,  paid  $4,483,000  out of corporate
funds. Closing occurred on January 30, 1997.

         The note payable agreement bears interest at 8.11% and requires monthly
principal  payments of $21,531,  plus  interest,  through  January 2002 with the
remaining  principal  and  interest  due  February  2002.  The note  payable  is
collateralized by the new corporate headquarters and manufacturing facility and,
among other  things,  requires  AVECOR to  maintain  certain  ratios  related to
leverage,  debt  service  and cash  flow.  As of June  30,  1998  AVECOR  was in
compliance with the ratios required by the note payable.  Additionally, the bank
note  payable  agreement  prohibits  AVECOR from  distributing  dividends to its
shareholders.

         At June 30, 1998, AVECOR had no restricted cash or investments.  Of the
$4,450,000  which was  restricted  at December  31, 1996 for purchase of the new
facility,  $1,000,000 was used in payment of the facility and $3,450,000  became
unrestricted,  was reinvested and is being used for general corporate  purposes,
research and development and working capital.

         Without  considering  the  impact  of  the  Merger,   AVECOR's  capital
expenditures for 1998 are expected to be approximately $4,000,000. This estimate
includes   additional   equipment,   molds  and   tooling  for  the  new  oxygen
saturation/hematocrit   device,  Affinity  blood  pump,  MYOtherm  XP,  and  for
furthering production and related efficiencies of the Affinity oxygenator line.

         The  foregoing  forward-looking  statements  relating  to the amount of
capital  expenditures  and ultimate  cash usage are dependent on the progress of
AVECOR's product development efforts, the outcome of certain patent matters, the
timing of the receipt of FDA marketing  clearances  for any future  products and
the investment made in opportunities to further  existing  products'  production
related to production efficiencies and quality, and reduced cost.


<PAGE>

Foreign Currency Transactions

         Transactions  by AVECOR's  international  subsidiaries  are negotiated,
invoiced and paid in various foreign currencies,  primarily pounds sterling, and
U.S. dollars. Accordingly,  AVECOR is currently subject to risks associated with
fluctuations in exchange rates between the various currencies.

         Substantially  all of AVECOR's  other  international  transactions  are
denominated in U.S.  dollars.  Fluctuations in currency  exchange rates in other
countries  may therefore  reduce the demand for AVECOR's  products by increasing
the price of AVECOR's  products in the  currency of the  countries  in which the
products are sold.

Year 2000 Issues

         Computer programs have historically been written to abbreviate dates by
using two digits  instead of four  digits to  identify a  particular  year.  The
so-called  "Year 2000" problem or "millennium  bug" is the inability of computer
software or hardware to recognize or properly  process  dates ending in or after
"00." As the year 2000  approaches,  significant  attention is being  focused on
updating or  replacing  such  software  and  hardware  in order to avoid  system
failures, miscalculations or business interruptions that might otherwise result.

         AVECOR has reviewed its internal  information systems and believes that
the costs and effort to address  the Year 2000  problem  will not be material to
its business,  financial condition or results of operations,  and, to the extent
necessary,  may be resolved through  replacement and upgrades to the software it
licenses  from third  parties.  AVECOR has also  reviewed its OnCourse  software
product,  the  software  embedded  in its  Affinity  blood pump  console and the
software for its  saturation/hematocrit  monitor under  development and believes
them to be Year  2000  compliant.  However,  the  Year  2000  problem  may  also
adversely impact AVECOR by affecting the business and operations of parties with
which AVECOR transacts business. AVECOR expects to initiate formal communication
with such parties regarding the Year 2000 problem later in 1998. There can be no
assurance  that  AVECOR  will be able to  effectively  address  Year 2000 issues
internally in a cost-efficient  manner and without interruption to its business,
or that Year 2000 difficulties encountered by its suppliers,  customers or other
parties  will  not  have a  material  impact  on  AVECOR's  business,  financial
condition and results of operations.

New Accounting Pronouncements

         In June 1997, the Financial Accounting Standards Board issued Statement
of Financial  Accounting  Standards No. 131,  "Disclosures  About Segments of an
Enterprise  and Related  Information,"  a new standard of reporting  information
about operating or business segments in financial  statements.  The new standard
will be effective for AVECOR's  annual  financial  statements in 1998.  Although
AVECOR has not  specifically  evaluated  what impact,  if any, this new standard
will have on AVECOR's  current  reporting  of operating  and business  segments,
AVECOR  believes  it will  continue  reporting  as one  operating  and  business
segment.


<PAGE>

Quarterly Operating Data

         The following  table sets forth  certain  unaudited  operating  data of
AVECOR for the first two quarters in 1998 and each of the four  quarters in 1997
and  1996.  In  the  opinion  of  AVECOR's  management,  the  data  include  all
adjustments,  consisting  of only normal  recurring  adjustments,  necessary  to
present fairly the information set forth therein.
<TABLE>
<CAPTION>

                                                          First       Second        Third        Fourth
                                                         Quarter      Quarter      Quarter       Quarter
                                                                         (unaudited)
                                                            (in thousands, except per share data)

<S>                                                      <C>          <C>          <C>           <C>     
1998
Net sales............................................    $12,456      $13,565       -             -
Gross profit.........................................      4,982        5,602       -             -
Net income...........................................        220          410       -             -
Diluted earnings per share...........................       $.03         $.05       -             -

1997
Net sales...........................................     $12,043      $11,961      $11,273        $11,587
Gross profit.........................................      4,983        5,061        4,785          4,461
Net income..........................................         387          403          365            172
Diluted earnings per share...........................       $.05         $.05         $.05           $.02

1996
Net sales...........................................     $10,293      $11,145      $11,315        $11,648
Gross profit.........................................      4,342        4,702        4,534          4,837
Net income (loss)....................................        211      (1,876)          628            470
Diluted earnings (loss) per share....................       $.03       $(.24)         $.08           $.06
</TABLE>

         The summation of quarterly  diluted  earnings  (loss) per share may not
equate to the calculation for the year, as quarterly  calculations  are prepared
on a discrete basis.  All earnings per share  calculations are presented per the
definition of "diluted earnings per share" from FASB Statement No. 128.



<PAGE>


                     CERTAIN TRANSACTIONS AND RELATIONSHIPS
                          BETWEEN AVECOR AND MEDTRONIC

         Stock Option  Agreement.  AVECOR and  Medtronic  are parties to a Stock
Option  Agreement  dated July 12, 1998,  pursuant to which AVECOR has granted to
Medtronic an option,  exercisable  under  certain  specified  circumstances,  to
purchase  19.9%  of the  AVECOR  Common  Stock.  See "The  Merger--Stock  Option
Agreement."


                                  LEGAL MATTERS

         The validity of the  Medtronic  Common Stock to be issued in connection
with the Merger will be passed upon for Medtronic by  Fredrikson & Byron,  P.A.,
Minneapolis,   Minnesota.   Members  of  such  firm  own,   in  the   aggregate,
approximately 86,400 shares of Medtronic Common Stock.

         Certain  legal  matters for AVECOR,  including  the federal  income tax
consequences  in  connection  with the Merger,  were passed upon by  Oppenheimer
Wolff & Donnelly LLP, Minneapolis,  Minnesota.  Members of such firm own, in the
aggregate, approximately 46,235 shares of Medtronic Common Stock.


                                     EXPERTS

         The  consolidated  financial  statements  incorporated  in  this  Proxy
Statement/Prospectus  by  reference  to  the  Annual  Report  on  Form  10-K  of
Medtronic,  Inc. for the year ended April 30, 1998 have been so  incorporated in
reliance on the report of  PricewaterhouseCoopers  LLP, independent accountants,
given on the authority of said firm as experts in auditing and accounting.

         The  consolidated  balance  sheets as of December 31, 1997 and 1996 and
the consolidated  statements of operations,  changes in shareholders' equity and
cash flows for each of the three years in the period ended  December 31, 1997 of
AVECOR  Cardiovascular  Inc.  included or incorporated by reference  herein have
been included or incorporated  by reference  herein in reliance on the report of
PricewaterhouseCoopers  LLP, independent accountants,  given on the authority of
that firm as experts in auditing and accounting.







<PAGE>

                          INDEX TO FINANCIAL STATEMENTS

                                                                            Page
AVECOR Cardiovascular Inc.

Audited Financial Statements and Related Notes

Report of Independent Accountants..........................................  F-2

Consolidated Balance Sheets as of December 31, 1997 and 1996 ..............  F-3

Consolidated Statements of Operations for the years ended
December 31, 1997, 1996 and 1995...........................................  F-4

Consolidated Statements of Changes in Shareholders' Equity for the
years ended December 31, 1997, 1996 and 1995 ..............................  F-5

Consolidated Statements of Cash Flows for the years ended
December 31, 1997, 1996 and 1995 ..........................................  F-6

Notes to Consolidated Financial Statements.................................  F-7

Unaudited Financial Statements and Related Notes

Consolidated Balance Sheet as of June 30, 1998............................. F-21

Consolidated  Statements of Operations for the three months ended
June 30, 1998 and 1997, and the six months ended
June 30, 1998 and 1997..................................................... F-22

Consolidated Statements of Cash Flow for the six months ended
June 30, 1998 and 1997..................................................... F-23

Notes to Consolidated Financial Statements................................. F-24



<PAGE>


                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Shareholders and Board of Directors of
AVECOR Cardiovascular Inc.:

 We  have  audited  the  accompanying  consolidated  balance  sheets  of  AVECOR
Cardiovascular  Inc.  as  of  December  31,  1997  and  1996,  and  the  related
consolidated statements of operations,  changes in shareholders' equity and cash
flows for each of the three years in the period ended  December 31, 1997.  These
financial  statements are the  responsibility of the Company's  management.  Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

 We  conducted  our  audits  in  accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

 In our opinion,  the financial  statements referred to above present fairly, in
all  material   respects,   the  consolidated   financial   position  of  AVECOR
Cardiovascular  Inc. as of  December  31,  1997 and 1996,  and the  consolidated
results of their  operations and their cash flows for each of the three years in
the period ended  December 31,  1997,  in  conformity  with  generally  accepted
accounting principles.


/s/ Coopers & Lybrand L.L.P.

Minneapolis, Minnesota
March 16, 1998



<PAGE>



                           AVECOR CARDIOVASCULAR INC.
                           CONSOLIDATED BALANCE SHEETS
                (in thousands except share and per share amounts)
<TABLE>
<CAPTION>
ASSETS                                                                        as of December 31,
                                                                       1997                            1996
                                                            -----------------                -----------------
<S>                                                                    <C>                              <C>   
Current assets:
     Cash and cash equivalents..........................               $1,215                           $6,114
     Short-term investments.............................                3,727                            2,638
     Accounts receivable, net...........................                8,277                            7,298
     Inventories........................................               10,634                            9,476
     Deferred taxes.....................................                1,315                            1,274
     Other current assets...............................                  330                              744
                                                            -----------------                -----------------
         Total current assets...........................               25,498                           27,544
Restricted cash and investments.........................                   --                            4,450
Property, plant and equipment, net......................               16,689                            4,808
Other assets............................................                  572                              359
                                                            -----------------                -----------------
         Total assets                                                 $42,759                          $37,161
                                                            =================                =================

LIABILITIES AND SHAREHOLDERS' EQUITY

Current liabilities:....................................
     Accounts payable...................................               $1,978                           $2,790
     Accrued expenses...................................                3,058                            3,091
     Current maturities of long-term debt...............                  258                               --
     Accrued litigation settlement......................                    --                           1,100
                                                            ------------------               -----------------
         Total current liabilities......................                5,294                            6,981
Deferred grant..........................................                  153                              205
Deferred taxes..........................................                   --                               37
Long-term debt..........................................                4,694                               --

Commitments and contingencies (Notes 5 and 9)

Shareholders' equity:
     Serial preferred stock, par value $.01 per share;
         authorized 2,000,000 shares; none issued
     Common stock,  par value  $.01 per  share;  
         authorized  20,000,000  shares;
         issued  and  outstanding  shares  
         8,021,000  and  7,812,000  shares  at
         December 31, 1997 and 1996, respectively...................       80                               78
     Additional paid-in capital.........................               30,482                           29,024
     Retained earnings..................................                1,936                              609
     Cumulative translation adjustments                                   120                              227
                                                            -----------------                -----------------
          Total shareholders' equity.....................              32,618                           29,938
                                                            -----------------                -----------------
         
          Total liabilities and shareholders' equity.....             $42,759                          $37,161
                                                            =================                =================
         
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements


<PAGE>



                           AVECOR CARDIOVASCULAR INC.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                     (in thousands except per share amounts)
<TABLE>
<CAPTION>

                                                               for the years ended December 31,
                                                        1997                    1996                    1995
                                             ---------------------------------------------------------------

<S>                                                   <C>                      <C>                    <C>    
Net sales.................................            $46,864                  $44,401                $33,340
Cost of sales.............................             27,574                   25,986                 18,180
                                                -------------            -------------          -------------

        Gross profit......................             19,290                   18,415                 15,160

Operating expenses:
    Selling, general and
     administrative.......................             13,428                   11,885                  8,727
    Litigation expense....................                 --                    4,205                    170
    Research and development..............              3,902                    3,651                  2,773
                                               --------------            -------------          -------------

        Operating income (loss)...........              1,960                   (1,326)                 3,490

    Interest income.......................                495                      725                    586

    Interest expense......................                383                       --                     --
                                               --------------           --------------          -------------

Income (loss) before income taxes.........              2,072                     (601)                 4,076
Income tax provision (benefit)............                745                      (34)                   780
                                               --------------           ---------------         -------------

        Net income (loss).................             $1,327                    $(567)                $3,296
                                               ==============           ==============          =============

Earnings per share:
    Basic.................................             $0.17                   $(0.07)                  $0.47
                                               =============            ==============          =============

    Diluted...............................             $0.17                   $(0.07)                  $0.45
                                               =============            ==============          =============
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements



<PAGE>



                           AVECOR CARDIOVASCULAR INC.
           CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY
                                 (in thousands)
              for the years ended December 31, 1997, 1996 and 1995
<TABLE>
<CAPTION>

                                                               Additional                   Cumulative
                                            Common Stock         Paid-In      Retained      Translation
                                         Shares     Par Value    Capital      Earnings      Adjustments       Total
<S>                                                       <C>     <C>           <C>              <C>          <C>    
Balances at December 31, 1994......        6,414          $64     $15,205       $(2,120)          $(4)         $13,145
Sale of shares pursuant to public
  stock offering, net of expenses
  of $1,283........................        1,161           12       12,641           --            --           12,653
Sale of shares for cash pursuant
  to Employee Stock Purchase Plan..           18           --          178           --            --              178
Exercise of stock options..........           71            1         (155)          --            --             (154)
Tax benefit realized upon exercise
  of stock options.................           --           --          255           --            --              255
Net income for 1995................           --           --           --        3,296            --            3,296
Cumulative translation adjustments.
                                              --           --           --           --           (51)             (51)
                                     -----------  -----------  -----------  -----------       --------        ---------

Balances at December 31, 1995......        7,664           77       28,124        1,176           (55)          29,322
Exercise of stock warrants, net of
  expenses of $35..................           85            1          528           --            --              529
Sale of shares for cash pursuant
  to Employee Stock Purchase Plan..           23           --          250           --            --              250
Exercise of stock options..........           40           --          (70)          --            --              (70)
Tax benefit realized upon exercise
  of stock options.................           --           --          192           --            --              192
Net loss for 1996..................           --           --           --         (567)           --             (567)
Cumulative translation adjustments.           --           --           --           --           282              282
                                     -----------  -----------  -----------  -----------       -------          -------

Balances at December 31, 1996......        7,812           78       29,024          609           227           29,938
Exercise of stock warrants.........            5           --           28           --            --               28
Sale of shares for cash pursuant
  to Employee Stock Purchase Plan..           34           --          283           --            --              283
Exercise of stock options..........          168            2          975           --            --              977
Shares issued pursuant to Medical
 Advisory Board agreement.........             2           --           29           --            --               29
Tax benefit realized upon exercise
  of stock options.................           --           --          143           --            --              143
Net income for 1997................           --           --           --        1,327            --            1,327
Cumulative translation  adjustments
                                              --           --           --           --          (107)            (107)
                                     -----------  -----------  -----------  -----------       --------         --------

Balances at December 31, 1997......        8,021          $80      $30,482       $1,936          $120          $32,618
                                     ===========   ==========   ==========   ==========       =======          =======
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements


<PAGE>
                           AVECOR CARDIOVASCULAR INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (in thousands)
<TABLE>
<CAPTION>
                                                                            for years ended December 31,
                                                                      1997               1996              1995
<S>                                                                  <C>                 <C>                <C>   
Cash flows from operating activities:
   Net income (loss)........................................         $1,327              $(567)             $3,296
   Adjustments to reconcile net income (loss) to net cash
    (used in) provided by operating activities:
      Depreciation and amortization.........................          1,748              1,375               1,063
      Accretion of discount on investments..................           (280)              (508)               (189)
      Provision for bad debts...............................            214                104                  42
      Deferred income taxes.................................            (78)              (867)               (370)
      Stock compensation....................................             29                 --                  --
      Deferred grant........................................            (52)               (67)                (19)
      Changes in operating assets and liabilities:
        Accounts receivable.................................         (1,292)              (958)             (2,088)
        Inventories.........................................         (1,185)            (3,547)             (1,696)
        Other current assets................................            401               (199)               (127)
        Accounts payable....................................           (762)               122                 946
        Accrued expenses....................................            139              1,542                 623
        Accrued litigation settlement.......................         (1,100)             1,100                  --
                                                                   ---------        ----------        ------------
          Net cash (used in) provided by operating activities          (891)            (2,470)              1,481
                                                                  ----------        -----------        -----------
Cash flows from investing activities:
   Purchase of property, plant and equipment................        (12,628)            (2,629)             (1,146)
   Purchase of short-term investments.......................         (6,891)            (6,183)             (7,666)
   Proceeds upon sale or maturity of short-term investments.          6,082             11,810               2,000
   Restricted cash and investments..........................          3,450             (4,450)                 --
   Increase in other assets.................................           (222)               (53)               (162)
                                                                    --------           --------             -------
          Net cash used in investing activities.............        (10,209)            (1,505)             (6,974)
                                                                    --------       ------------        ------------
Cash flows from financing activities:
   Net proceeds from sales of common stock..................            283                250              12,831
   Net proceeds from options exercised......................            977                (70)               (154)
   Net proceeds from warrants exercised.....................             28                529                  --
   Borrowings on long-term debt.............................          5,167                 --                  --
   Principal payments on long-term debt.....................           (215)                --                  --
   Grant proceeds...........................................             --                102                  --
                                                                 ----------        -------------      ------------
          Net cash provided by financing activities.........          6,240                811              12,677
                                                                  ---------        -------------        ----------
Effect of exchange rates on cash............................            (39)               100                 (41)
                                                                ------------       -------------     --------------
Net (decrease) increase in cash and cash equivalents........         (4,899)            (3,064)              7,143
Cash and cash equivalents, beginning of year................          6,114              9,178               2,035
                                                                  ---------        -----------         -----------
Cash and cash equivalents, end of year......................         $1,215             $6,114              $9,178
                                                                   ========         ==========          ==========
Supplemental disclosure:
   Significant non-cash investing and financing transactions:
       Use of restricted funds for purchase of the U.S.
         facility...........................................         $1,000                 --                  --
       Accounts payable recorded for the purchase of
         property, plant and equipment......................             --               $387                  --
Cash paid for income taxes..................................           $235                $57                $654
Cash paid for interest......................................           $348                 --                  --
</TABLE>

               The accompanying notes are an integral part of the
                        consolidated financial statements

<PAGE>



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.       Business Description and Significant Accounting Policies:

         BUSINESS DESCRIPTION:

         AVECOR Cardiovascular Inc. (the "Company") was incorporated on December
         13, 1990.  The Company  develops,  manufactures  and markets  specialty
         medical devices for heart/lung bypass surgery and long-term respiratory
         support.

         PRINCIPLES OF CONSOLIDATION:

         The consolidated  financial  statements  include the accounts of AVECOR
         Cardiovascular   Inc.  and  its   wholly-owned   subsidiaries,   AVECOR
         Cardiovascular  Ltd.  and  AVECOR  Foreign  Sales  Corporation,   after
         elimination of all significant intercompany transactions and accounts.

         CASH AND CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS:

         For  financial  reporting  purposes,  the Company  considers all highly
         liquid investments  purchased with an original maturity of three months
         or less to be cash equivalents.  The Company's cash and cash equivalent
         balances are concentrated  primarily with two investment managers,  the
         majority of which is invested in daily money market funds.

         Short-term  investments  consist of bank certificates of deposit,  U.S.
         government  securities,   agency  paper,  commercial  paper  and  other
         corporate obligations,  and money market instruments and are classified
         as short-term in the balance sheet based on their maturity date. All of
         the Company's short-term  investments mature in 1998 and are considered
         by  management  to be  "available  for sale." At December  31, 1997 and
         1996,  the  estimated   fair  value  of  the   short-term   investments
         approximated   their  cost.   Unrealized  gains  and  losses  were  not
         significant.

         At  December  31,  1997,   the  Company  had  no  restricted   cash  or
         investments.  At December 31,  1996,  cash and  short-term  investments
         totaling $4,450,000 were restricted as to their use.

         CONCENTRATIONS OF CREDIT RISK:

         The Company's accounts  receivable are primarily due from hospitals and
         independent foreign distributors located mainly in the U.S. and Western
         Europe.  Although  the  Company  does not require  collateral  from its
         customers,  concentrations  of  credit  risk in the U.S.  are  somewhat
         mitigated by a large number of geographically  dispersed customers. The
         Company  does not  presently  anticipate  credit risk  associated  with
         foreign trade  receivables  (see Note 6), although  collection could be
         impacted by the underlying economies of the respective countries.

         INVENTORIES:

         Inventories  are  stated  at the  lower of cost or  market,  with  cost
         determined on the first-in, first-out method.


<PAGE>

         PROPERTY, PLANT AND EQUIPMENT:

         Property,  plant and  equipment  are  carried at cost less  accumulated
         depreciation  and  amortization.   Depreciation  and  amortization  are
         generally recorded using the straight-line method over estimated useful
         asset lives.  The  Company's new U.S.  facility  carries asset lives of
         forty,   fifteen   and  seven  years  for  the   building   and  shell,
         improvements,  and equipment and furniture,  respectively.  The cost of
         molds,  tooling and dies is capitalized and depreciated  generally over
         periods  of  three  to five  years  using  straight-line  or  units  of
         production  methods.  Other  equipment and leasehold  improvements  are
         generally carry  estimated  useful lives of five years or less (shorter
         of asset life or lease term for leasehold  improvements).  See "REVENUE
         RECOGNITION"  below for the Company's  policy with regards to its blood
         pump equipment placed with customers.

         Maintenance,  repairs and minor  improvements are charged to expense as
         incurred while major  betterments  and renewals are  capitalized.  When
         assets  are  sold  or  retired,   the  cost  and  related   accumulated
         depreciation  and  amortization  are removed  from the accounts and the
         resulting gain or loss is included in operations.

         LONG-LIVED ASSETS:

         The  recoverability  of  long-lived  assets  is  assessed  annually  or
         whenever adverse events or changes in circumstances or business climate
         indicate that the expected cash flows  previously  anticipated  warrant
         reassessment.   When  such  reassessments  indicate  the  potential  of
         impairment,  all business  factors are considered  and, if the carrying
         values of long-lived  assets are not likely to be recovered from future
         net  operating  cash  flows,  they will be written  down for  financial
         reporting purposes.

         REVENUE RECOGNITION:

         For all products, other than when the equipment portion of the Affinity
         blood pump system is shipped to the customer but title remains with the
         Company, the Company recognizes sales upon product shipment.

         During  1997,  the Company  began  marketing  the  Affinity  blood pump
         system.  This  blood  pump  system has both  equipment  and  disposable
         products which are manufactured and marketed by the Company. Typically,
         when the  equipment  portion  of the  system is  shipped,  title to the
         equipment  remains  with the Company.  Subsequently,  the total cost of
         this equipment is realized through ongoing sales of disposable products
         to the customer,  and accordingly is amortized and recorded as a charge
         to operations over the life of the equipment,  generally using an asset
         life of three to five years.

         RESEARCH AND DEVELOPMENT:

         Research and development costs are expensed as incurred.

         INCOME TAXES:

         The Company accounts for income taxes using the liability  method.  The
         liability  method provides that deferred tax assets and liabilities are
         recorded based on the  differences  between the tax bases of assets and
         liabilities and their carrying amounts for financial reporting purposes
         ("temporary  differences")  using  enacted  tax  rates in effect in the
         years in which the  differences  are  expected  to  reverse.  Temporary
         differences  relate  primarily to the allowance for doubtful  accounts,
         obsolete inventory allowances, depreciation, and accruals for vacation,
         product liability and warranty costs.


<PAGE>

         NET INCOME (LOSS) PER SHARE:

         In February  1997,  the  Financial  Accounting  Standards  Board issued
         Statement No. 128, a new standard for computing and presenting earnings
         per share.  As required,  the Company  adopted this new standard in the
         fourth  quarter of 1997.  Net income  (loss) per share for all  periods
         presented  have been  computed  by  dividing  net income  (loss) by the
         weighted average number of common shares outstanding  ("basic EPS") and
         by the weighted average number of common and common  equivalent  shares
         outstanding  ("diluted EPS").  Common equivalent shares relate to stock
         options and stock warrants when their effect is not antidilutive.

         For all  periods  presented,  the  weighted  average  common and common
         equivalent shares outstanding are as follows:
<TABLE>
<CAPTION>


                                                              For the years ended December 31,
                                                       1997                 1996                  1995
                                              -------------------    ----------------     ------------------
<S>                                                    <C>                 <C>                    <C>      
           Weighted average common
             shares outstanding                        7,921,000           7,767,000              7,046,000

           Common equivalent shares
             outstanding:
                Option equivalents                        68,000                   -                262,000
                Warrant equivalents                        1,000                   -                 45,000
                                              -------------------    ----------------     ------------------

           Weighted average common
             and common equivalent
             shares outstanding                        7,990,000           7,767,000              7,353,000
                                              ===================    ================     ==================
</TABLE>

         FOREIGN CURRENCY TRANSLATION:

         All assets and liabilities of the Company's international  subsidiaries
         are  translated  to U.S.  dollars at  year-end  exchange  rates,  while
         elements of the  statement  of  operations  are  translated  at average
         exchange  rates in  effect  during  the year.  Translation  adjustments
         arising  from the use of  differing  exchange  rates  are  included  in
         cumulative translation adjustments in shareholders' equity.

         USE OF ESTIMATES:

         The  preparation of financial  statements in conformity  with generally
         accepted  accounting  principles  requires management to make estimates
         and  assumptions  that  affect  the  reported  amounts  of  assets  and
         liabilities and disclosure of contingent  assets and liabilities at the
         date of the financial  statements and the reported  amounts of revenues
         and expenses during the reporting  period.  Actual results could differ
         from those estimates.  The most significant areas which require the use
         of management's estimates relate to the determination of the allowances
         for doubtful accounts receivable and obsolete inventories, the need for
         a  valuation  allowance  on deferred  tax assets and the  determination
         related to the probability of the patent contingency matter.


<PAGE>

2.       Balance Sheet Information:

         The  following  provides  additional  information  concerning  selected
         balance sheet accounts as of December 31, 1997 and 1996:
<TABLE>
<CAPTION>
                                                      1997            1996
                                                 ------------    ------------

<S>                                              <C>             <C>
           Accounts receivable, net:
              Accounts receivable                $  8,611,000    $  7,418,000
              Allowance for doubtful
                 accounts                            (334,000)       (120,000)
                                                 ------------    ------------

                                                 $  8,277,000    $  7,298,000
                                                 ============    ============

           Inventories:
              Raw materials                      $  3,758,000    $  3,424,000
              Work-in-progress                      2,189,000       2,343,000
              Finished goods                        4,687,000       3,709,000
                                                 ------------    ------------

                                                 $ 10,634,000    $  9,476,000
                                                 ============    ============

           Property, plant and equipment, net:
              Land                               $  1,409,000    $       --
              Building                              7,413,000         557,000
              Machinery and equipment               5,181,000       3,324,000
              Office and laboratory equipment       3,448,000       2,430,000
              Molds, tooling and dies               3,011,000       2,183,000
              Leasehold improvements                  829,000         786,000
              Equipment placed with customers       1,494,000            --
                                                  ------------    ------------

                                                   22,785,000       9,280,000
           Accumulated depreciation and
              amortization                         (6,096,000)     (4,472,000)
                                                 ------------    ------------

                                                 $ 16,689,000    $  4,808,000
                                                 ============    ============

           Accrued expenses:
              Payroll                            $    150,000    $    472,000
              Vacation                                319,000         288,000
              Commissions                             290,000         447,000
              Income taxes                            709,000         616,000
              Real estate taxes                       355,000            --
              Other                                 1,235,000       1,268,000
                                                 ------------    ------------

                                                 $  3,058,000    $  3,091,000
                                                 ============    ============
</TABLE>
<PAGE>


3. Shareholders' Equity:

         SERIAL PREFERRED STOCK:

         The Company's Second Restated  Articles of  Incorporation,  as amended,
         provide for  2,000,000  shares of preferred  stock,  par value $.01 per
         share,  issuable in series  ("Serial  Preferred  Stock").  The Board of
         Directors  is empowered to  authorize  the issuance and  establish  the
         terms of any shares of the Serial  Preferred Stock without  shareholder
         approval. In 1996, the Board of Directors authorized 200,000 shares for
         issuance  as Series A Junior  Preferred  Stock  under  the  Shareholder
         Rights Plan.

         STOCK INCENTIVE PLAN:

         The Company's 1991 Stock Incentive Plan ("Plan")  provides for granting
         to eligible  employees and certain other  individuals  nonqualified and
         incentive options.  The Company has reserved 1,050,000 shares of common
         stock for  issuance  under the Plan.  At  December  31, 1997 there were
         20,000  options  available for grant under the Plan. In December  1997,
         the Company's  Board of Directors  authorized,  subject to  shareholder
         approval,  an additional  450,000 shares of common stock to be reserved
         for issuance  under the Plan.  Also,  in December  1997,  the Company's
         Board of Directors  authorized  50,000  stock  option  grants under the
         Plan, subject to shareholder  approval.  Options granted under the Plan
         are generally  exercisable beginning one year from the date of grant in
         cumulative yearly amounts of 25% of the shares under option and expire,
         if not exercised, five to ten years after the date of grant.

         Pursuant  to the terms of the  Plan,  optionees  may use  cash,  tender
         previously  owned  shares,  or be credited  for a portion of the shares
         exercised  to  reimburse  the  Company for the cost of  exercising  the
         options and the taxes due on the recognized  gain. The shares  tendered
         from the  optionee  or  credited  at time of  exercise  are at the fair
         market value of the stock on the  transaction  date.  No common  shares
         were  credited to  optionees to satisfy such  obligations  in 1997.  In
         1996,  19,000 common  shares  valued at $278,000  and, in 1995,  33,000
         shares  valued at $486,000  were credited the optionees at the exercise
         date to satisfy such obligations.

         Upon  the  occurrence  of  a  change  of  control  (as  defined),   all
         outstanding  options  become  immediately  exercisable  in full and all
         restrictions  with  respect  to  outstanding  restricted  stock  awards
         immediately lapse.

         The Plan also  provides  for stock  bonuses  and  awards of  restricted
         shares of the Company's common stock to eligible recipients. Restricted
         shares awarded may not be sold, assigned,  or otherwise  transferred by
         the recipient  until the shares awarded become free of  restrictions on
         transferability.  All  shares  still  subject to  restrictions  will be
         forfeited  and  returned  to the Plan if  affiliation  with the Company
         terminates.  Plan administrators may waive or accelerate the lapsing of
         restrictions.

         There were no stock bonuses and no  restricted  shares issued under the
         Plan for the years ended December 31, 1997, 1996 and 1995.
<PAGE>

         A summary of option transactions under the Plan for 1997, 1996 and 1995
         follows:
<TABLE>
<CAPTION>

                                                                    Weighted Average             Option
                                                                        Exercise               Price Range
                                                    Shares          Price Per Share             Per Share
           ------------------------------------- ------------- -- --------------------- -- --------------------

<S>                                               <C>                   <C>                  <C>  
           Balances, December 31, 1994             570,000               $6.65                $1.00 - $9.94

                Options granted                     42,000               $10.63              $8.38 - $12.63
                Options exercised                 (104,000)              $3.20                $1.00 - $9.88
                Options cancelled                   (3,000)              $9.88                    $9.88
                                                 -------------

           Balances, December 31, 1995             505,000               $7.67               $1.00 - $12.63

                Options granted                    309,000               $12.32              $10.88 - $14.75
                Options exercised                  (58,000)              $3.58               $1.00 - $12.00
                Options cancelled                 (113,000)              $11.99              $9.88 - $12.00
                                                 -------------

           Balances, December 31, 1996             643,000               $9.51               $2.00 - $14.75

                Options granted                    286,000               $8.28               $7.00 - $12.00
                Options exercised                 (168,000)              $5.81                $2.00 - $9.94
                Options cancelled                  (77,000)              $11.16              $6.38 - $14.00
                                                 -------------

           Balances, December 31, 1997             684,000               $9.72               $5.13 - $14.75
                                                 =============
</TABLE>

         The  following  table  summarizes   information   about  stock  options
         outstanding and exercisable at December 31, 1997:
<TABLE>
<CAPTION>

                                                Options Outstanding                          Options Exercisable
                                 --------------------------------------------------    --------------------------------
                                                     Weighted-
                                                        Avg.           Weighted-                           Weighted-
               Range of                              Remaining            Avg.                                Avg.
               Exercise             Number          Contractual         Exercise           Number           Exercise
                Prices            Outstanding           Life             Price          Exercisable          Price
          -------------------    --------------    ---------------    -------------    ---------------    -------------

<S>                                 <C>             <C>                  <C>                <C>              <C>  
            $5.13 - $7.00            29,000          2.0 years            $6.72              19,000           $6.57
                $7.13               182,000          9.9 years            $7.13                 -                 -
            $7.63 - $10.00          222,000          3.1 years            $9.74             114,000           $9.70
            $10.13 - $14.75         251,000          3.4 years            $11.94             56,000          $12.00
                                 --------------                                        ---------------

                                    684,000          5.0 years            $9.72             189,000          $10.08
                                 ==============                                        ===============
</TABLE>

         1995 NON-EMPLOYEE DIRECTOR PLAN:

         In 1995, the Company's Board of Directors authorized,  and in 1996, the
         Company's  shareholders  approved,  a reserve of 250,000  shares of the
         Company's  common stock for issuance to  Non-Employee  Directors of the
         Company,  pursuant to the 1995  Non-Employee  Director  Plan (the "1995
         Director Plan"). Options granted under the 1995 Director Plan vest on a
         cumulative  basis,  with one third  exercisable as of the date of grant
         and the remainder becoming exercisable in equal installments on each of
         the first and second  anniversaries  of the date of grant.  Each option
         expires  and is no longer  exercisable  on the date ten years  from its

<PAGE>

         date of grant.  Options to purchase  42,000 shares at $13.38 and 10,500
         shares  at  $12.25  per  share  were  granted  during  1995  and  1996,
         respectively.   At  December  31,  1997,  there  were  197,500  options
         available for grant under the 1995 Director Plan.

         The  following  table  summarizes   information   about  stock  options
         outstanding and exercisable at December 31, 1997:
<TABLE>
<CAPTION>

                                                 Options Outstanding                           Options Exercisable
                                 ----------------------------------------------------    ---------------------------------
                                                      Weighted-
                                                         Avg.            Weighted-                            Weighted-
               Range of                               Remaining            Avg.                                 Avg.
               Exercise              Number          Contractual         Exercise            Number           Exercise
                Prices            Outstanding            Life              Price          Exercisable           Price
          -------------------    ---------------    ---------------    --------------    ---------------    --------------

<S>                                  <C>             <C>                  <C>                 <C>               <C>   
          $12.25 - $13.38             52,500          7.7 years            $13.15              49,000            $13.21
</TABLE>

         ACCOUNTING FOR STOCK-BASED COMPENSATION:

         The  Company  adopted  Financial   Accounting  Standards  Board  Issued
         Statement No. 123, "Accounting for Stock-Based Compensation",  in 1996.
         The  Company  has  continued  to  measure  compensation  cost  for  its
         stock-based  compensation plans using the intrinsic  value-based method
         of accounting and, therefore, the new standard has had no effect on the
         Company's operating results.

         Had the Company used the fair value-based  method of accounting for its
         1991 Stock Incentive Plan and 1995 Non-Employee Director Plan beginning
         with options granted in 1995 and charged this  compensation  cost along
         with  the  value of the  shares  granted  through  the  Employee  Stock
         Purchase Plan against income, over the plans' vesting periods, based on
         the fair value of options at the date of grant,  net income  (loss) and
         diluted  earnings  (loss) per share for 1997,  1996 and 1995 would have
         been as follows:
<TABLE>
<CAPTION>

                                                                     1997             1996              1995
         ------------------------------------ ----------------- ---------------- ---------------- -----------------

<S>                                           <C>                <C>               <C>              <C>       
         Net income (loss)                    As reported        $1,327,000        $(567,000)       $3,296,000
                                              Pro forma          $1,011,000        $(845,000)       $3,117,000

         Diluted net earnings (loss)
         per share                            As reported            $0.17           $(0.07)            $0.45
                                              Pro forma              $0.13           $(0.11)            $0.42
</TABLE>

         The pro forma information above only includes stock options granted and
         stock  purchased  under the Employee Stock Purchase Plan in 1995,  1996
         and 1997.

         The fair value of each option grant was  estimated on the date of grant
         using  the  Black-Scholes  option-pricing  model  for  the  1991  Stock
         Incentive Plan and the 1995 Non-Employee Director Plan. The assumptions
         for 1997, 1996 and 1995 were as follows:
<TABLE>
<CAPTION>

                                                1997                          1996                         1995
        ---------------------------- ---------------------------- ----------------------------- ----------------------------

                                     1991 Incentive    1995         1991 Incentive    1995        1991 Incentive   1995
                                          Plan        Director          Plan         Director         Plan        Director
                                                        Plan                          Plan                         Plan
        ---------------------------- ---------------- ----------- ----------------- ----------- ---------------- -----------
<S>                                  <C>                <C>         <C>             <C>          <C>             <C>

        Risk-free interest rates       5.8% - 6.6%       6.2%       5.2% - 6.8%        6.2%       6.2% - 7.8%       6.6%
        Expected life                 4.3 - 8 years    8 years       4.3 years       8 years       4.3 years      8 years
        Expected volatility                50%           50%            50%            50%            50%           50%
        Expected dividends                 0%             0%             0%             0%            0%             0%
</TABLE>
<PAGE>

         WARRANTS:

         In connection  with the  completion of its initial  public  offering of
         common shares in 1992, the Company  granted to the  representatives  of
         the  underwriters  warrants  for  90,000  shares of common  stock at an
         exercise  price of $6.60 per share.  During 1997 and 1996,  the Company
         issued 5,000 and 85,000 shares of common stock, respectively,  pursuant
         to the exercise of these warrants.  At December 31, 1997,  there are no
         outstanding warrants.

         EMPLOYEE STOCK PURCHASE PLAN:

         The AVECOR  Cardiovascular  Inc.  Employee  Stock Purchase Plan ("Stock
         Purchase  Plan"),  which is available to  substantially  all employees,
         enables  eligible  employees  to  contribute  up to 10% of their  wages
         toward  quarterly  purchases  of the  Company's  common stock at 85% of
         market  value  on the  first  or  last  day of each  calendar  quarter,
         whichever had the lower stock price.  The Company has reserved  100,000
         shares of common  stock for  issuance  under the Stock  Purchase  Plan.
         Employees  purchased  34,000  shares at an  average  price of $7.72 per
         share in 1997, 23,000 shares at an average price of $11.00 per share in
         1996,  and  18,000  shares at an  average  price of $10.17 per share in
         1995. In 1997, the Company's Board of Directors authorized,  subject to
         shareholder  approval,  an additional 125,000 shares of common stock to
         be reserved for issuance  under the Stock Purchase Plan as, at December
         31, 1997,  there were no shares of common stock  available for purchase
         under this plan.

         SHAREHOLDER RIGHTS PLAN:

         In June 1996, the Company adopted a shareholder  rights plan,  pursuant
         to which the Company declared a dividend  distribution of one Preferred
         Share  Purchase  Right on each  share  of the  Company's  Common  Stock
         outstanding  on August 2, 1996.  Each Right  entitles the holder to buy
         one-thousandth  of a share of the Company's  Series A Junior  Preferred
         Stock,  or a combination of securities and assets of equivalent  value,
         at an exercise price of $80.00, subject to adjustment.  The description
         and terms of the Rights are set forth in a Rights  Agreement dated June
         26, 1996, as amended,  between the Company and Norwest Bank  Minnesota,
         N.A., as Rights Agent.

4.       Long-term Debt:

         In January 1997, the Company purchased a new corporate headquarters and
         manufacturing  facility for $9,650,000 and consolidated its former four
         separate U.S. facilities. In connection with this purchase, the Company
         entered into a $5,167,000  bank note payable  agreement in January 1997
         and, in addition, utilizing restricted cash and investments, funded the
         remaining cost of the new building.

         The bank note payable  agreement  bears  interest at 8.11% and requires
         monthly principal payments of $21,531,  plus interest,  through January
         2002 with the remaining  principal and interest due February  2002. The
         bank note payable is collateralized  by the new corporate  headquarters
         and  manufacturing  facility  and,  among other  things,  requires  the
         Company to meet certain  ratios  related to leverage,  debt service and
         cash flow. Additionally,  the bank note payable agreement prohibits the
         Company from distributing  dividends to its  shareholders.  The Company
         believes the fair value of this debt approximates its carrying value at
         December 31, 1997.


<PAGE>

         At December 31,  1997,  remaining  principal  payments on the bank note
         payable are as follows:

           Year Ending December 31
           ------------------------------------------------

           1998                             $   258,000
           1999                                 258,000
           2000                                 258,000
           2001                                 258,000
           2002                               3,920,000
                                        -------------------

                                             $4,952,000
                                        ===================

5.       Commitments:

         LEASES:

         In 1996 and years prior,  the Company  leased all of its facilities and
         certain  equipment  pursuant to  operating  leases.  The leases for the
         Company's United States operating  facilities expired in December 1996,
         at which time the Company occupied its new corporate headquarters.  The
         Company's facility near Glasgow, Scotland is leased for a period of ten
         years  ending in  October  2003.  This  lease  agreement  provides  for
         adjustment  of  minimum  rentals  based upon  market  rates in 1998 and
         requires  minimum  monthly  rental  payments plus real estate taxes and
         applicable common facility operating expenses.

         Rent  expense,  including  allocated  real estate  taxes and  operating
         expenses,  under all  rental  agreements  was  $325,000,  $725,000  and
         $596,000  for the  years  ended  December  31,  1997,  1996  and  1995,
         respectively.

         The following is a schedule of future minimum lease  payments  pursuant
         to the terms of the  non-cancellable  leases for the Glasgow,  Scotland
         facility described above:

           Year Ending December 31
           ----------------------------------------- -----------------

                     1998                             $   147,000
                     1999                                 147,000
                     2000                                 147,000
                     2001                                 147,000
                     2002                                 147,000
                     2003 and thereafter                  112,000
                                                      ----------- 
                                                      $   847,000
                                                      ===========

         ROYALTY AGREEMENTS:

         Silicone products -
         In connection with the Company's June 1991  acquisition of the Surgical
         Division of SCIMED Life Systems, Inc. (the Predecessor  Business),  the
         Company  entered into a royalty  agreement  with SCIMED.  The agreement
         required the Company to make payments to SCIMED  primarily based on net
         sales  (as  defined),   through  June  1996,  of  products   previously
         manufactured  by the Predecessor  Business as of the acquisition  date.
         The Company  incurred  royalties  of $95,000 and $178,000 for the years
         ended December 31, 1996 and 1995, respectively, under this agreement.


<PAGE>

         The  agreement  also provides for royalty  payments  should the Company
         develop and sell new products (new  generation  products) using certain
         technology  embodied in product  models  developed  by the  Predecessor
         Business.  This  element of the  agreement  expires  in June 2001.  The
         Company has not paid or incurred any such  royalties  through  December
         31, 1997.

         Affinity blood pump -
         The Company also entered into a royalty  agreement in  connection  with
         the  Company's  acquisition  of an  exclusive  license  to  market  the
         Affinity  blood  pump.  This  agreement  requires  the  Company to make
         payments based on net sales of the pump chamber (the disposable portion
         of the Affinity  blood pump system) and net profits of the pump console
         (the  equipment  portion of the  Affinity  blood pump  system)  through
         August 2002.  The term of the  agreement may be extended by the Company
         until the expiration of the  last-to-expire  of the patents  covered by
         this  agreement  or the  useful  life  of  the  know-how  (as  defined)
         licensed,   whichever  is  longer.  Under  the  terms  of  the  royalty
         agreement,  the  Company  must pay  minimum  royalties  each year.  The
         Company's royalties incurred of $55,000 for the year ended December 31,
         1997  exceeded  the  minimum  royalty  related to the first year of the
         royalty agreement.

         Bio-passive surface -
         The Company also has use of an exclusive license allowing it to apply a
         bio-passive surface to its products. The agreement requires the Company
         to make  quarterly  payments  based  on a  percentage  of net  sales of
         products  utilizing  the  bio-passive  surface.  The Company can retain
         exclusivity  of the license if it pays minimum  annual  royalties.  The
         Company  incurred  royalties of $35,000 for the year ended December 31,
         1997 under this agreement.

         PRODUCT LIABILITY:

         The Company is self-insured on product liability claims below a certain
         dollar limitation and maintains product liability  insurance above this
         limitation per claim and in the aggregate.

         CONFIDENTIALITY AND NONCOMPETE AGREEMENTS:

         The Company has entered into confidentiality and non-compete agreements
         with certain employees.  If any of these employees are terminated,  the
         Company is conditionally required to pay the employee 75% of his or her
         base  salary,  as defined,  during the  non-compete  period (one to two
         years) if the employee remains unemployed during this period.

6.       Industry Segment Information:

         Since its  inception,  the Company has operated in the single  industry
         segment of developing, manufacturing and marketing medical devices.

         The Company distributes its products through its direct sales force and
         independent sales  representatives  in the United States,  Canada,  the
         United Kingdom and France.  Additionally,  the Company  distributes its
         products through foreign independent distributors,  primarily in Europe
         and  Asia,   who  then   market  the   products   directly  to  medical
         institutions.  During 1997, the Company terminated  agreements with its
         last remaining domestic distributor and its only Canadian  distributor.
         A direct sales force now serves the markets formerly  assigned to these

<PAGE>

         distributors.  Management  does not believe  the  Company is  primarily
         dependent upon any one distributor for the ultimate sale of products to
         medical institutions.  Sales to distributors accounting for 10% or more
         of the Company's net sales were as follows:

                                          1997          1996           1995
           --------------------------  ------------ -------------  ------------

           Distributor #1                 (1)            (1)       $ 3,503,000

         (1)      Accounted for less than 10% of the Company's net sales.

         Total export sales from the U.S. to unaffiliated entities (primarily to
         Europe and payable in U.S.  dollars) were  $4,952,000,  $4,912,000  and
         $3,480,000,  respectively,  for the years ended December 31, 1997, 1996
         and 1995.

         At December 31, 1997 and 1996, consolidated accounts receivable include
         $4,366,000 and  $3,738,000,  respectively,  due from customers  located
         outside of the U.S.
<TABLE>
<CAPTION>

                                                        AVECOR               AVECOR
                                                    Cardiovascular       Cardiovascular
           Year Ended December 31                        Inc.                 Ltd.           Consolidated
           -------------------------------------- -------------------- ------------------- ------------------

<S>                                                 <C>                   <C>                <C>        
           1997
           Sales to unaffiliated customers          $32,634,000           $14,230,000        $46,864,000
           Operating income                           1,640,000               320,000          1,960,000
           Identifiable assets                       36,705,000             6,054,000         42,759,000

           1996
           Sales to unaffiliated customers           31,290,000            13,111,000         44,401,000
           Operating income (loss)                   (1,738,000)              412,000         (1,326,000)
           Identifiable assets                       30,699,000             6,462,000         37,161,000

           1995
           Sales to unaffiliated customers           22,638,000            10,702,000         33,340,000
           Operating income                           2,806,000               684,000          3,490,000
           Identifiable assets                       27,902,000             5,617,000         33,519,000
</TABLE>

         During the years  ended  December  31,  1997,  1996,  and 1995,  AVECOR
         Cardiovascular   Ltd.  made  capital   expenditures  of   approximately
         $393,000, $146,000 and $57,000, respectively.

         In June 1997, the Financial Accounting Standards Board issued Statement
         131,   "Disclosures   About  Segments  of  an  Enterprise  and  Related
         Information," a new standard of reporting  information  about operating
         or business segments in financial statements.  The new standard will be
         effective  for the  Company's  annual  financial  statements  in  1998.
         Although the Company has not  evaluated  what impact,  if any, this new
         standard will have on the Company's  current reporting of operating and
         business  segments,  the Company believes it will continue reporting as
         one operating and business segment.


<PAGE>

7.       Retirement Savings Plan:

         The AVECOR  Cardiovascular  Inc.  Retirement Savings Plan (the "Savings
         Plan") is a profit  sharing plan which  provides for voluntary  pre-tax
         employee  contributions and discretionary  employer matching and profit
         sharing  contributions  and is intended to satisfy the  requirements of
         Section 401(k) of the Internal Revenue Code.  Generally,  all employees
         of the Company who are over 21 years of age and who have  completed one
         year of service  with the Company are  eligible to  participate  in the
         Savings Plan. The Company did not make any contributions to the Savings
         Plan in 1997,  and made  contributions  of $23,000  and  $10,000 to the
         Savings Plan related to 1996 and 1995, respectively.

8.       Income Taxes:

         The components of the Company's  income tax provision  (benefit) are as
         follows:
<TABLE>
<CAPTION>

                                                          Year Ended December 31
                                                1997               1996              1995
             ---------------------------- ------------------ ----------------- ------------------

 <S>                                       <C>                 <C>               <C>        
            Current
                 U.S. federal             $   585,000         $  484,000        $   875,000
                 U.S. state                    15,000             57,000              5,000
                 International                223,000            292,000            270,000
             Deferred                         (78,000)          (867,000)          (370,000)
                                          ------------------ ----------------- ------------------

                                          $   745,000         $  (34,000)       $   780,000
                                          ================== ================= ==================
</TABLE>

         The  variance  of the 1997 and 1996  effective  tax rate  from the U.S.
         statutory  tax  rate  was  primarily  due  to  losses  incurred  by the
         Company's French  subsidiary for which no tax benefit has been recorded
         because  of  the  uncertainty  of  their  realization,  offset  by  the
         generation of research and experimentation credits. The variance of the
         1995 effective tax rate from the U.S.  statutory tax rate was primarily
         due to utilization  of $1,730,000 of net operating  loss  carryforwards
         ("NOLs") and $26,000 of state research and experimentation credits.

         Components of the Company's  deferred tax assets and liabilities are as
         follows:
<TABLE>
<CAPTION>
                                                                                  December 31
                                                                           1997                 1996
            ------------------------------------------------------- -------------------- -------------------

<S>                                                                    <C>                   <C>        
            Deferred tax assets:
                 Patent settlement                                     $         -           $   418,000
                 Research and experimentation credits                       881,000              560,000
                 French subsidiary NOL carryforwards                        226,000              119,000
                 AMT carryforwards                                          195,000
                                                                                         -
                 Other, primarily certain accrued expenses                  239,000              296,000
                 Valuation allowance                                       (226,000)            (119,000)
                                                                    -------------------- -------------------

                                                                          1,315,000            1,274,000
            Deferred tax liabilities:
                 Depreciation                                                    -               (37,000)
                                                                    -------------------- -------------------

            Net deferred tax assets                                      $1,315,000           $1,237,000
                                                                    ==================== ===================
</TABLE>

         The  Company  has  established  a  valuation  allowance  to offset  its
         deferred tax asset related to its French subsidiary's NOL carryforwards
         due to the  uncertainty  of their  realization.  The NOL  carryforwards
         expire from 2000 to 2002. The Company expects its future taxable income
         will be sufficient to realize its other deferred tax assets; therefore,
         there is no valuation allowance offsetting them.


<PAGE>

         Available  research and  experimentation  credits at December 31, 1997,
         represent  federal  and state  amounts of  approximately  $632,000  and
         $249,000,  respectively,  with  expiration  dates  ranging from 2007 to
         2012. The Company's AMT credit carryforwards do not expire.

         Domestic and  international  components  of income (loss) before income
         taxes are as follows:
<TABLE>
<CAPTION>

                                                                     Year Ended December 31
                                                           1997               1996              1995
             --------------------------------------- ------------------ ----------------- ------------------

<S>                                                   <C>                 <C>               <C>        
             AVECOR Cardiovascular Inc.               $ 1,663,000         $(1,088,000)      $ 3,351,000
             AVECOR Cardiovascular Ltd.                   409,000             487,000           725,000
                                                     ================== ================= ==================
                                                      $ 2,072,000         $  (601,000)      $ 4,076,000
                                                     ================== ================= ==================
</TABLE>

         Undistributed   earnings  of  the  Company's  foreign   subsidiary  are
         indefinitely   reinvested  in  foreign  operations.   Accordingly,   no
         provision  has been made for income  taxes  that might be payable  upon
         remittance.

9.       Patent Matters:

         In March 1997,  the Company filed suit in U.S.  District  Court for the
         District of Minnesota, seeking to invalidate a newly issued U.S. patent
         held by a competing manufacturer of blood oxygenators and other medical
         devices,  and requesting a  determination  that the Company's  Affinity
         oxygenator does not infringe the competitor's patent. The Company filed
         suit in  response  to a  December  1996  letter  from  the  competitor,
         alleging that the Affinity  oxygenator  infringes  certain claims under
         the competitor's patent, and requesting discussion regarding a possible
         license  agreement.   The  Company  reviewed  the  subject  patent  and
         concluded,  based on an opinion from its patent  counsel,  that none of
         the claims in the patent are infringed by the Affinity oxygenator,  and
         that the  patent  is, in any event,  invalid.  On October 6, 1997,  the
         Magistrate Judge of the United States District Court vacated a previous
         order and granted a stay in the  proceedings,  including the suspension
         of  discovery,  pending  the  outcome of the  competitor's  request for
         re-issuance  of the  aforementioned  patent.  The  expense  and  effort
         potentially  required to bring this  action,  as well as the outcome of
         any  counterclaim  successfully  brought  against  the  Company  by the
         competitor,  could  have a  material  adverse  effect on the  Company's
         business, financial condition and results of operations.

         In 1996, the Company reached an agreement with COBE  Laboratories  Inc.
         (COBE) to settle COBE's  patent suit against the Company.  The terms of
         the settlement  with COBE provided for the Company to make net payments
         totaling $2,200,000. Two net payments of $1,100,000 were made in August
         1996  and  August  1997,  respectively.  The net  settlement  costs  of
         $2,200,000 and the associated  legal costs were  recognized as a charge
         to operations in 1996.

10.      Quarterly Data (Unaudited):

         The following table sets forth certain unaudited operating data for the
         four quarters in 1997 and 1996. In the opinion of management,  the data
         include  all   adjustments,   consisting   of  only  normal   recurring
         adjustments,  necessary  to present  fairly the  information  set forth
         therein.

<PAGE>

<TABLE>
<CAPTION>

                                                     First         Second          Third         Fourth
             (unaudited)                            Quarter        Quarter        Quarter        Quarter
             ----------------------------------- -------------- -------------- -------------- --------------
             (In  thousands,  except  per share
             data)

<S>                                                <C>            <C>            <C>            <C>     
             1997
             Net sales                             $ 12,043       $ 11,961       $ 11,273       $ 11,587
             Gross profit                             4,983          5,061          4,785          4,461
             Net income                                 387            403            365            172
             Diluted income per share                 $ .05          $ .05          $ .05       $    .02

             1996
             Net sales                             $ 10,293       $ 11,145       $ 11,315       $ 11,648
             Gross profit                             4,342          4,702          4,534          4,837
             Net income (loss)                          211         (1,876)           628            470
             Diluted income (loss) per share          $ .03         $ (.24)         $ .08          $ .06
</TABLE>

           The summation of quarterly  diluted earnings (loss) per share may not
           equate to the calculation for the year as quarterly  calculations are
           prepared on a discrete basis. All earnings per share calculations are
           presented  per the  definition  of "diluted  earnings per share" from
           FASB Statement No. 128.

11.        New Accounting Standard:

           In  June  1997,  the  Financial  Accounting  Standards  Board  issued
           Statement  130,  "Reporting  Comprehensive  Income,"  a new  standard
           requiring  the  reporting  and  display  of  "comprehensive   income"
           (defined  as the change in equity of a business  enterprise  during a
           period from sources other than those  resulting  from  investments by
           owners and  distributors  to owners) and its components in a full set
           of general  purpose  financial  statements.  The new standard will be
           effective for the Company's annual financial  statements in 1998. The
           Company's cumulative translation adjustment is considered a component
           of "comprehensive income," however the Company has not evaluated what
           other  components  of its changes in equity  would be  components  of
           "comprehensive income."



<PAGE>
                           AVECOR CARDIOVASCULAR INC.

                           CONSOLIDATED BALANCE SHEET
                                   (Unaudited)
                        (In thousands, except share data)
<TABLE>
<CAPTION>

      ASSETS                                              June 30,
                                                            1998
<S>                                                        <C>   
Current assets:                                        
     Cash and cash equivalents                             $3,837
     Short-term investments                                 1,966
     Accounts receivable, net                               9,443
     Inventories                                           10,837
     Deferred taxes                                         1,315
     Other current assets                                     412
                                                        ---------
              Total current assets                         27,810
                                                       
Property, plant and equipment, net                         17,658
Other assets                                                  581
                                                       
              Total assets                                $46,049
                                                       
      LIABILITIES AND SHAREHOLDERS' EQUITY             
                                                       
Current liabilities:                                   
     Accounts payable                                      $3,845
     Accrued expenses                                       3,733
     Current portion of long-term debt                        258
                                                         --------  
              Total current liabilities                     7,836
                                                       
Deferred grant                                                136
Long-term debt                                              4,632
                                                       
Shareholders' equity:                            
     Serial preferred stock, par value $.01 per share;
       authorized 2,000,000 shares; none issued
     Common stock,  par value  $.01 per  share;
       authorized  20,000,000 shares;
       issued and outstanding shares 8,042,000 and
       8,021,000  shares at June 30, 1998 and
         December 31, 1997, respectively                       80
     Additional paid-in capital                            30,622
     Retained earnings                                      2,566
     Cumulative translation adjustments                       177
                                                         --------  
              Total shareholders' equity                   33,445
                                                         --------  

              Total liabilities and shareholders' equity  $46,049
                                                         ========  
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements.



<PAGE>

                           AVECOR CARDIOVASCULAR INC.

                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (Unaudited)
                 (In thousands, except share and per share data)
<TABLE>
<CAPTION>
                                                  Three months ended                  Six months ended
                                                       June 30,                             June 30,
                                                  -----------------------          -----------------------
                                                   1998            1997                1998         1997
                                                  -------         -------          -------         -------

<S>                                               <C>             <C>              <C>             <C>    
Net sales                                         $13,565         $11,961          $26,021         $24,004
Cost of sales                                       7,963           6,900           15,437          13,960
                                                  -------         -------          -------         -------
     Gross profit                                   5,602           5,061           10,584          10,044

Operating expenses:
   Selling, general and
     administrative                                 4,075           3,482            7,883           6,832
   Research and development                       895,000             974            1,726           2,076
                                                  -------         -------          -------         -------

     Operating income                                 632             605              975           1,136

   Interest income                                     78             129              164             273
   Interest expense                                  (99)           (105)            (199)           (176)
                                                  -------         -------          -------         -------

Income before income taxes                            611             629              940           1,233
Income tax provision                                  201             226              310             443
                                                  -------         -------          -------         -------

     Net income                                      $410            $403             $630            $790
                                                  =======         =======          =======         =======
Earnings per share:
   Basic                                            $0.05           $0.05            $0.08           $0.10
                                                  =======         =======          =======         =======
   Diluted                                          $0.05           $0.05            $0.08           $0.10
                                                  =======         =======          =======         =======
   
Weighted average common shares
   outstanding                                  8,032,000       7,914,000        8,027,000       7,880,000

   Common equivalents:
     Options                                        2,000          63,000            2,000          97,000
     Warrants                                           -           2,000                -           2,000
                                                  -------         -------          -------         -------

Weighted average common and
   common equivalents                           8,034,000       7,979,000        8,029,000       7,979,000
                                                =========       =========        =========       =========
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements.

<PAGE>


                           AVECOR CARDIOVASCULAR INC.

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (Unaudited)
                                 (In thousands)
<TABLE>
<CAPTION>

                                                                                For the six months ended June 30,
                                                                                ---------------------------------
                                                                                      1998                1997
                                                                                    --------            -------- 
<S>                                                                                   <C>                 <C> 
Cash flows from operating activities:
   Net income                                                                           $630                $790
   Adjustments to reconcile net income to net cash provided
   by operating activities:
       Depreciation and amortization                                                   1,191                 737
       Accretion of discount on investments                                              (83)               (170)
       Changes in operating assets and liabilities:
                  Accounts receivable                                                 (1,118)             (1,524)
           Inventories                                                                  (197)               (782)
           Other current assets                                                          (80)                277
           Accounts payable                                                            1,845                 758
           Accrued expenses                                                              660                 393
                                                                                    --------            -------- 
              Net cash provided by operating activities                                2,848                 479
                                                                                    --------            -------- 

Cash flows from investing activities:
   Purchase of property, plant and equipment                                          (2,090)             (9,911)
   Purchase of investments                                                                 -              (8,768)
   Proceeds upon sale or maturity of short-term investments                            1,844               5,140
   Cash and investments restricted as to use                                               -               3,450
   Increase in other assets                                                              (11)                154)
                                                                                    --------            -------- 
       Net cash used in investing activities                                        (257,000)        (10,243,000)
                                                                                    --------            -------- 
                                                                                 

Cash flows from financing activities:
   Net proceeds from sales of common stock                                               140                 130
   Net proceeds from options exercised                                                    --                 582
   Borrowings on long-term debt                                                           --               5,167
   Principal payments on long-term debt                                                 (129)                (86)     
                                                                                    ========            ======== 
       Net cash provided by financing activities                                          11               5,793
                                                                                    ========            ======== 

Effect of exchange rates on cash                                                          20                (35)
                                                                                    --------            -------- 

Net increase (decrease) in cash and cash equivalents                                   2,622             (4,006)

Cash and cash equivalents at beginning of period                                       1,215              6,114
                                                                                    --------            -------- 

Cash and cash equivalents at end of period                                            $3,837             $2,108
                                                                                    ========            ======== 

Significant non-cash investing and financing transactions:
   Acquisition of equipment through capital leases                                       $67                  --
                                                                                    ========            ======== 
          
   Use of restricted funds for purchase of the U.S. facility                              --             $1,000
                                                                                    ========            ======== 
                                                                                         
</TABLE>

               The accompanying notes are an integral part of the
                       consolidated financial statements.


<PAGE>


                           AVECOR CARDIOVASCULAR INC.

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)


1.       Basis of Presentation

         The   consolidated   financial   statements   included  in  this  Proxy
Statement/Prospectus  have been  prepared  by AVECOR  Cardiovascular  Inc.  (the
Company), without audit, pursuant to the rules and regulations of the Securities
and Exchange  Commission  (SEC).  Certain  information and footnote  disclosures
normally included in financial  statements prepared in accordance with generally
accepted  accounting  principles  have been condensed,  or omitted,  pursuant to
these rules and regulations. The year-end balance sheet was derived from audited
financial statements, but does not include all disclosures required by generally
accepted accounting  principles.  These unaudited consolidated interim financial
statements should be read in conjunction with the audited  financial  statements
and related notes included elsewhere in this Proxy Statement/Prospectus.

         The consolidated  interim financial  statements  presented herein as of
June 30,  1998 and for the three and six month  periods  ended June 30, 1998 and
1997 reflect, in the opinion of management,  all adjustments (which include only
normal,  recurring  adjustments)  necessary for a fair presentation of financial
position and the results of operations and cash flows for the periods presented.
The results of operations for any interim period are not necessarily  indicative
of results for the full year.

2.       Organization

         The Company was incorporated on December 13, 1990. The Company designs,
develops,  manufactures  and markets  specialty  medical  devices for heart/lung
bypass surgery and long-term respiratory support.

         The consolidated  financial  statements  include the accounts of AVECOR
Cardiovascular  Inc. and its wholly-owned  subsidiaries,  AVECOR  Cardiovascular
Ltd. and AVECOR Foreign Sales  Corporation  after elimination of all significant
intercompany transactions and accounts.

3.       Inventories

         Inventories consist of the following:

                                                        June 30,    
                                                          1998      
                                                      ----------- 

            Raw materials                             $ 3,735,000   
            Work-in-process                             2,121,000   
            Finished goods                              4,981,000   
                                                      -----------   

                                                      $10,837,000   
                                                      ===========   
<PAGE>

4.       Industry Segment Information

         The Company distributes its products through its direct sales force and
independent  sales  representatives  in the United  States,  Canada,  the United
Kingdom and France.  Additionally,  the Company distributes its products through
foreign  independent  distributors  who then  market the  products  directly  to
medical institutions. No one independent distributor or other customer accounted
for 10% or more of the  Company's  net sales for the six  months  ended June 30,
1998 or 1997.

         Total export sales from the U.S. to unaffiliated entities (primarily to
Europe and payable in U.S. dollars) were $1,960,000 and $3,338,000 for the three
and six month periods ended June 30, 1998, respectively,  compared to $1,248,000
and  $2,563,000  for the  three  and six  month  periods  ended  June 30,  1997,
respectively.  Sales to  customers  located  outside of the United  States  were
approximately 41% and 40% of net sales for the three and six month periods ended
June 30, 1998, respectively, compared to 41% for the three and six month periods
ended June 30, 1997.

         At June 30, 1998,  consolidated accounts receivable included $4,943,000
due from customers located outside of the U.S.

         In June 1997, the Financial Accounting Standards Board issued Statement
131,  "Disclosures  About Segments of an Enterprise and Related  Information," a
new standard of reporting  information  about operating or business  segments in
financial  statements.  The new  standard  will be effective  for the  Company's
annual financial  statements in 1998.  Although the Company has not specifically
evaluated  what impact,  if any,  this new standard  will have on the  Company's
current  reporting of operating and business  segments,  the Company believes it
will continue reporting as one operating and business segment.

      5.  Comprehensive Income

         In the  first  quarter  of  1998,  the  Company  adopted  Statement  of
Financial  Accounting Standards No. 130, "Reporting  Comprehensive  Income." The
standard  requires the display and  reporting  of  comprehensive  income,  which
includes all changes in  shareholders'  equity with the  exception of additional
investments by  shareholders or  distributions  to  shareholders.  Comprehensive
income for the  Company  includes  net income and foreign  currency  translation
which is  charged or  credited  to the  cumulative  translation  account  within
shareholders'  equity.  Comprehensive  income for the three and six months ended
June 30, 1998 and 1997 and the year ended December 31, 1997, was as follows:
<TABLE>
<CAPTION>

                                   Three Months Ended                  Six Months Ended,        
                                        June 30,                           June 30,             
                                  1998             1997              1998             1997      
                              -------------     ------------     -------------    ------------- 

<S>                             <C>               <C>              <C>              <C>         
Net income                      $410,000          $403,000         $630,000         $790,000    

Changes in cumulative
  translation                     (9,000)           74,000           58,000          (90,000)   
                              -------------     ------------     -------------    ------------- 

Comprehensive income            $401,000          $477,000         $688,000         $700,000    
                              =============     ============     =============    ============= 
</TABLE>
<PAGE>

6.       Patent Matters

         In March 1997,  the Company filed suit in U.S.  District  Court for the
District of Minnesota,  seeking to invalidate a newly issued U.S. patent held by
a competing  manufacturer of blood  oxygenators and other medical  devices,  and
requesting a  determination  that the  Company's  Affinity  oxygenator  does not
infringe  the  competitor's  patent.  The  Company  filed suit in  response to a
December 1996 letter from the competitor,  alleging that the Affinity oxygenator
infringes  certain  claims  under  the  competitor's   patent,   and  requesting
discussion  regarding a possible  license  agreement.  The Company  reviewed the
subject patent and concluded,  based on an opinion from its patent counsel, that
none of the claims in the patent are infringed by the Affinity  oxygenator,  and
that the patent is, in any event,  invalid.  On October 6, 1997,  the Magistrate
Judge of the U.S.  District Court vacated a previous order and granted a stay in
the proceedings,  including the suspension of discovery,  pending the outcome of
the  competitor's  request for  re-issuance of the  aforementioned  patent.  The
expense and effort  potentially  required to bring this  action,  as well as the
outcome of any  counterclaim  successfully  brought  against  the Company by the
competitor,  could have a material  adverse  effect on the  Company's  business,
financial condition and results of operations.

7.       Acquisition of the Company

         On July 12, 1998, Medtronic, Inc. ("Medtronic") and the Company entered
into  an  agreement  under  which  Medtronic  will  acquire  the  Company  in  a
transaction  valued at approximately $91 million.  The transaction calls for the
Company's  shareholders  to receive $11.125 in Medtronic stock for each share of
the  Company's  stock they hold at the  transaction  close date.  In addition to
shareholder  approval,  the  transaction  is  subject  to  customary  conditions
including  Hart-Scott-Rodino  clearance.  The companies expect completion of the
transaction in late 1998.
<PAGE>

                                                                      Appendix A
                                 PLAN OF MERGER
                                       OF
                                 AC MERGER CORP.
                                      INTO
                           AVECOR CARDIOVASCULAR, INC.


                                    ARTICLE 1
                        NAMES OF CONSTITUENT CORPORATIONS

         1.1 Constituent Corporations. The names of the Constituent Corporations
are AC Merger Corp., a Minnesota corporation ("Merger  Subsidiary"),  and AVECOR
Cardiovascular,  Inc., a Minnesota corporation (the "Company").  The Constituent
Corporations  shall be  combined  by the  merger of Merger  Subsidiary  into the
Company as the Surviving Corporation (the "Merger"),  pursuant to the applicable
provisions of the Minnesota Business Corporation Act ("MBCA").

         1.2 Certain Definitions.  As used in this Plan of Merger, the following
capitalized terms shall have the following meanings:

                  (a) "Company  Common Stock" means common stock of the Company,
         par value $.01 per share.

                  (b) "Company  Options" means all options to purchase shares of
         Company Common Stock that are outstanding at the Effective Time.

                  (c)  "Conversion  Fraction" means as defined in Section 2.2(a)
         hereof.

                  (d) "Merger  Agreement" means that certain  Agreement and Plan
         of  Merger  dated  July 12,  1998,  by and  among  Medtronic,  Inc.,  a
         Minnesota   corporation  and  sole  shareholder  of  Merger  Subsidiary
         ("Parent"),  Merger Subsidiary,  and the Company, a copy of which shall
         be maintained at the Surviving Corporation's principal executive office
         and made available to any shareholder of either Constituent Corporation
         upon request.

                  (e) "Merger  Subsidiary  Common  Stock"  means common stock of
         Merger Subsidiary, par value $.01 per share.

                  (f)  "Parent  Average  Stock  Price"  shall  mean the  average
         (rounded to the  nearest  full cent,  with the cents  rounded up if the
         third decimal place is 5 or more) of the daily closing sale prices of a
         share of Parent Common Stock as reported on the New York Stock Exchange
         ("NYSE")  Composite Tape, as reported in The Wall Street  Journal,  for
         the 18 consecutive NYSE trading days ending on and including the second
         NYSE trading day immediately preceding the Effective Time.

                  (g) "Parent  Common  Stock" means common stock of Parent,  par
         value $.10 per share.

                  (h) "Surviving Corporation" means the Company as the surviving
         corporation  of the  merger  of  Merger  Subsidiary  with  and into the
         Company.


<PAGE>

                  (i) "Surviving Corporation Common Stock" means common stock of
         the Surviving Corporation, par value $.01 per share.


                                    ARTICLE 2
                              TERMS AND CONDITIONS

         2.1 Merger;  Effective  Time.  The Merger shall be  effective  upon the
filing with the  Minnesota  Secretary  of State of Articles of Merger  including
this Plan of Merger and such other  documents  as are required by the MBCA to be
filed with the  Secretary of State of  Minnesota  (the time of such filing being
the "Effective  Time"). At the Effective Time, the separate  existence of Merger
Subsidiary  shall cease and the Company shall alone continue in existence as the
Surviving Corporation. All transactions on and after the Effective Time shall be
deemed  transactions  of and for the  account of the  Company  as the  Surviving
Corporation.

         2.2  Conversion  of Shares.  At the  Effective  Time,  by virtue of the
Merger and  without any action on the part of any holder of any share of capital
stock of the Company or Merger Subsidiary:

                  (a) Each share of Company Common Stock issued and  outstanding
         immediately prior thereto (except for Dissenting  Shares, as defined in
         Section 2.3 hereof, and except for shares referred to in Section 2.2(b)
         hereof) shall be converted  into the right to receive the fraction of a
         share  (subject  to  adjustment  as  provided  below,  the  "Conversion
         Fraction")  of Parent  Common  Stock  equal to  $11.125  divided by the
         Parent Average Stock Price.

                  Notwithstanding  the  foregoing,  if the sum of the  number of
         shares of Company  Common Stock  outstanding  immediately  prior to the
         Effective  Time plus the number of shares  subject to then  outstanding
         options,  warrants, or other rights to acquire shares of Company Common
         Stock  (collectively,  "Company Stock  Acquisition  Rights") is greater
         than 8,879,725  shares plus that number of shares issuable  pursuant to
         the  current  offering  period in  process as of the date of the Merger
         Agreement  under the Company's  Employee  Stock Purchase Plan or if the
         aggregate  exercise price of all such Company Stock Acquisition  Rights
         then outstanding is less than the aggregate exercise price reflected in
         Section 3.4 of the Merger Agreement,  then the $11.125 amount per share
         of Company  Common Stock,  as described  above,  shall be reduced to an
         amount,  if lower,  equal to (i) $11.125 times  [8,879,725  shares plus
         that number of shares issuable  pursuant to the current offering period
         in process as of the date of the Merger  Agreement  under the Company's
         Employee  Stock  Purchase  Plan]  minus the  aggregate  exercise  price
         reflected  in Section 3.4 of the Merger  Agreement  plus the  aggregate
         amount  received by the Company as a result of any  issuance of Company
         Common  Stock  after  the  date  of this  Agreement  and  prior  to the
         Effective  Time plus the aggregate  exercise price of all Company Stock
         Acquisition Rights outstanding  immediately prior to the Effective Time
         divided by (ii) the sum of (A) the  number of shares of Company  Common
         Stock outstanding  immediately prior to the Effective Time plus (B) the
         number of shares  subject  to Company  Stock  Acquisition  Rights  then
         outstanding.

                  An appropriate adjustment shall similarly be made in the event
         that,  prior to the Effective Time, the  outstanding  shares of Company
         Common Stock, without new consideration,  are changed into or exchanged
         for a different kind of shares or securities  through a reorganization,
         reclassification,  stock  dividend,  stock  combination,  or other like
         change in the Company's capitalization.  Notwithstanding the foregoing,

<PAGE>

         nothing in this section shall be deemed to constitute  authorization or
         permission  for or  consent  from  Parent or Merger  Subsidiary  to any
         increase in the number of shares of Company Common Stock outstanding or
         subject  to  outstanding  Company  Stock  Acquisition  Rights,  to  any
         decrease   in  the   exercise   price  of  such   Rights,   or  to  any
         reorganization, reclassification, stock dividend, stock combination, or
         other like change in capitalization.

                  (b) Each share of Company Common Stock issued and  outstanding
         immediately prior to the Effective Time that is then owned beneficially
         or of record by Parent,  Merger  Subsidiary,  or any direct or indirect
         subsidiary of Parent or the Company shall be cancelled  without payment
         of any consideration therefor and without any conversion thereof.

                  (c) Each  share of any  other  class of  capital  stock of the
         Company  (other than Company  Common Stock) shall be cancelled  without
         payment  of any  consideration  therefor  and  without  any  conversion
         thereof.

                  (d) Each share of Merger  Subsidiary  Common  Stock issued and
         outstanding  immediately prior to the Effective Time shall be converted
         into one share of Surviving Corporation Common Stock.

 .  Notwithstanding  any provision of the Merger Agreement to the contrary,  each
outstanding  share of Company Common Stock, the holder of which has demanded and
perfected such holder's right to dissent from the Merger and to be paid the fair
value of such shares in accordance  with  Sections  302A.471 and 302A.473 of the
MBCA and, as of the Effective Time, has not  effectively  withdrawn or lost such
dissenters'  rights  ("Dissenting  Shares"),  shall  not be  converted  into  or
represent  a right to receive  the  Parent  Common  Stock  into which  shares of
Company  Common  Stock are  converted  pursuant to Section  2.2 hereof,  but the
holder thereof shall be entitled only to such rights as are granted by the MBCA.
Parent  shall  cause the  Company to make all  payments  to holders of shares of
Company  Common Stock with respect to such demands in accordance  with the MBCA.
The Company shall give Parent (i) prompt  written notice of any notice of intent
to demand fair value for any shares of Company Common Stock, withdrawals of such
notices,  and any other  instruments  served  pursuant  to the MBCA or any other
provisions  of  Minnesota  law  and  received  by  the  Company,  and  (ii)  the
opportunity to conduct jointly all  negotiations and proceedings with respect to
demands for fair value for shares of Company  Common  Stock under the MBCA.  The
Company shall not, except with the prior written consent of Parent,  voluntarily
make any  payment  with  respect  to any  demands  for fair  value for shares of
Company Common Stock or offer to settle or settle any such demands.

         2.4      Exchange of Company Common Stock.

                  (a)  Promptly  after the  Effective  Time,  Parent shall cause
         Parent's  stock  transfer  agent or such  other  person as  Parent  may
         appoint to act as exchange agent (the "Exchange Agent") to mail to each
         holder of record (other than Parent,  Merger  Subsidiary,  or any other
         subsidiary of Parent or the Company) of a certificate  or  certificates
         that immediately  prior to the Effective Time  represented  outstanding
         shares of Company Common Stock ("Company  Certificates")  a form letter
         of  transmittal  (which shall specify that delivery shall be effective,
         and risk of loss and title to the  Company  Certificate(s)  shall pass,
         only upon delivery of the Company Certificate(s) to the Exchange Agent)
         and  instructions  for such  holder's use in effecting the surrender of
         the Company  Certificates  in exchange  for  certificates  representing
         shares of Parent Common Stock.


<PAGE>

                  (b) As soon as  practicable  after  the  Effective  Time,  the
         Exchange Agent shall  distribute to holders of shares of Company Common
         Stock,  upon  surrender  to the  Exchange  Agent of one or more Company
         Certificates for cancellation,  together with a duly-executed letter of
         transmittal,  (i)  one or more  Parent  certificates  representing  the
         number of whole  shares of Parent  Common  Stock  into which the shares
         represented  by the Company  Certificate(s)  shall have been  converted
         pursuant to Section 2.2(a), and (ii) a bank check in the amount of cash
         into which the shares represented by the Company  Certificate(s)  shall
         have been converted  pursuant to Section 2.4(f) (relating to fractional
         shares),  and  the  Company  Certificate(s)  so  surrendered  shall  be
         cancelled.  In the event of a transfer of ownership  of Company  Common
         Stock that is not registered in the transfer records of the Company, it
         shall be a condition to the  issuance of shares of Parent  Common Stock
         that the  Company  Certificate(s)  so  surrendered  shall  be  properly
         endorsed  or be  otherwise  in proper form for  transfer  and that such
         transferee  shall (i) pay to the  Exchange  Agent any transfer or other
         taxes required,  or (ii) establish to the  satisfaction of the Exchange
         Agent that such tax has been paid or is not payable.

                  (c)  Holders of Company  Common  Stock will be entitled to any
         dividends or other distributions  pertaining to the Parent Common Stock
         received in exchange  therefor  that become  payable to persons who are
         holders  of record of Parent  Common  Stock as of a record  date on the
         same date as or after the  Effective  Time,  but only  after  they have
         surrendered  their Company  Certificates  for exchange.  Subject to the
         effect,  if any, of applicable  law, the Exchange  Agent shall receive,
         hold, and remit any such dividends or other  distributions to each such
         record holder entitled thereto, without interest, at the time that such
         Company   Certificates  are  surrendered  to  the  Exchange  Agent  for
         exchange.  Holders  of  Company  Common  Stock  will  not be  entitled,
         however, to dividends or other distributions that become payable before
         or after the  Effective  Time to persons who were  holders of record of
         Parent  Common Stock as of a record date that is prior to the Effective
         Time.

                  (d)  All  shares  of  Parent  Common  Stock  issued  upon  the
         surrender for exchange of Company  Common Stock in accordance  with the
         terms hereof (including any cash paid for fractional shares pursuant to
         Section  2.4(f)  hereof)  shall be deemed  to have been  issued in full
         satisfaction of all rights  pertaining to such shares of Company Common
         Stock.

                  (e)  After  the  Effective  Time,  there  shall be no  further
         registration  of transfers on the stock transfer books of the Surviving
         Corporation of the shares of Company Common Stock that were outstanding
         immediately  prior to the Effective Time. If, after the Effective Time,
         Company  Certificates  representing  such shares are  presented  to the
         Surviving  Corporation,  they  shall  be  cancelled  and  exchanged  as
         provided in this Article 2. As of the  Effective  Time,  the holders of
         Company Certificates  representing shares of Company Common Stock shall
         cease to have any rights as  shareholders  of the Company,  except such
         rights,  if any,  as they may have  pursuant  to the  MBCA.  Except  as
         provided  above,  until such Company  Certificates  are surrendered for
         exchange,  each such Company  Certificate  shall,  after the  Effective
         Time,  represent  for all purposes only the right to receive the number
         of whole shares of Parent Common Stock into which the shares of Company
         Common  Stock  shall  have been  converted  pursuant  to the  Merger as
         provided  in Section  2.2(a)  hereof and the right to receive  the cash
         value of any fraction of a share of Parent  Common Stock as provided in
         Section 2.4(f) hereof.

                  (f)  No  fractional  shares  of  Parent  Common  Stock  and no
         certificates or scrip therefor, or other evidence of ownership thereof,
         shall  be  issued   upon  the   surrender   for   exchange  of  Company
         Certificates,  no dividend or other distribution of Parent shall relate
         to any fractional  share, and such fractional share interests shall not

<PAGE>

         entitle the owner thereof to vote or to any rights of a shareholder  of
         Parent.  All fractional shares of Parent Common Stock to which a holder
         of Company Common Stock  immediately  prior to the Effective Time would
         otherwise be entitled,  at the Effective  Time,  shall be aggregated if
         and to the extent  multiple  Company  Certificates  of such  holder are
         submitted together to the Exchange Agent. If a fractional share results
         from such  aggregation,  then (in lieu of such  fractional  share)  the
         Exchange  Agent  shall pay to each  holder of shares of Company  Common
         Stock who otherwise would be entitled to receive such fractional  share
         of Parent Common Stock an amount of cash (without interest)  determined
         by  multiplying  (i)  the  Parent  Average  Stock  Price  by  (ii)  the
         fractional  share of Parent  Common  Stock to which such  holder  would
         otherwise be entitled. Parent will make available to the Exchange Agent
         any cash necessary for this purpose.

                  (g) In the  event any  Company  Certificates  shall  have been
         lost, stolen, or destroyed,  the Exchange Agent shall issue in exchange
         for such lost,  stolen,  or destroyed  Company  Certificates,  upon the
         making of an affidavit of that fact by the holder thereof,  such shares
         of Parent Common Stock and cash for fractional  shares,  if any, as may
         be required pursuant to this Article 2; provided,  however, that Parent
         may, in its  discretion  and as a condition  precedent  to the issuance
         thereof,  require the owner of such lost,  stolen, or destroyed Company
         Certificate  to  deliver  a bond in such sum as  Parent  may  direct as
         indemnity  against  any claim  that may be made  against  Parent or the
         Exchange Agent with respect to such Company Certificate alleged to have
         been lost, stolen, or destroyed.

                  (h) Each person  entitled to receive  shares of Parent  Common
         Stock  pursuant  to this  Article 2 shall  receive  together  with such
         shares the number of Parent  preferred share purchase rights  (pursuant
         to the Rights  Agreement dated as of June 27, 1991,  between Parent and
         Norwest Bank  Minnesota,  N.A.,  the "Parent Rights Plan") per share of
         Parent  Common  Stock  equal to the  number of Parent  preferred  share
         purchase rights associated with one share of Parent Common Stock at the
         Effective Time.

         2.5  Exchange of Merger  Subsidiary  Common  Stock.  From and after the
Effective Time, each outstanding  certificate previously  representing shares of
Merger  Subsidiary  Common  Stock  shall be deemed for all  purposes to evidence
ownership  of and to  represent  the number of shares of  Surviving  Corporation
Common Stock into which such shares of Merger Subsidiary Common Stock shall have
been  converted.  Promptly after the Effective  Time, the Surviving  Corporation
shall issue to Parent a stock  certificate  or  certificates  representing  such
shares of Surviving  Corporation Common Stock in exchange for the certificate or
certificates that formerly represented shares of Merger Subsidiary Common Stock,
which shall be cancelled.

         2.6      Stock Options.

                  (a) Except as  provided  below with  respect to the  Company's
         Employee Stock Purchase Plan, each option to purchase shares of Company
         Common  Stock that is  outstanding  at the  Effective  Time (a "Company
         Option")  shall,  by virtue of the Merger and without any action on the
         part of the holder  thereof,  be assumed by Parent (and a  registration
         statement  on Form  S-8  therefor  shall be filed  promptly  after  the
         Effective  Time)  in  such  manner  that  Parent  (i) is a  corporation
         "assuming  a stock  option in a  transaction  to which  Section  424(a)
         applies"  within  the  meaning  of  Section  424 of the  Code  and  the
         regulations  thereunder  or (ii) to the extent that  Section 424 of the

<PAGE>

         Code  does  not  apply  to any  such  Company  Option,  would be such a
         corporation  were  Section 424 of the Code  applicable  to such Company
         Option.  From and after  the  Effective  Time,  all  references  to the
         Company  in the  Company  Options  shall be  deemed  to refer to Parent
         (other than for purposes of determining whether there has been a change
         in control of the Company). The Company Options assumed by Parent shall
         be exercisable  upon the same terms and conditions as under the Company
         Options  (including   provisions  thereof,  if  any,  relating  to  the
         acceleration of vesting upon a change in control of the Company) except
         that (i) such Company Options shall entitle the holder to purchase from
         Parent  the number of shares of Parent  Common  Stock  (rounded  to the
         nearest  whole  number of such  shares)  that equals the product of the
         Conversion  Fraction  multiplied  by the  number of  shares of  Company
         Common Stock subject to such option  immediately prior to the Effective
         Time,  and (ii) the option  exercise  price per share of Parent  Common
         Stock shall be an amount  (rounded  to the nearest  full cent) equal to
         the option  exercise  price per share of Company Common Stock in effect
         immediately  prior to the  Effective  Time  divided  by the  Conversion
         Fraction;  provided, however, that in the case of any Company Option to
         which  Section 421 of the Code  applies by reason of its  qualification
         under Section 422 of the Code  ("incentive  stock option"),  the option
         price, the number of shares purchasable pursuant to such option and the
         terms and conditions of exercise of such options shall be determined in
         order to  comply  with  Section  424(a)  of the Code.  As  promptly  as
         practicable after the Effective Time, Parent shall issue to each holder
         of a Company Option a written  instrument  informing such holder of the
         assumption by Parent of such Company Option.

                  (b) The current  offering  period in process as of the date of
         the Merger  Agreement under the Company's  Employee Stock Purchase Plan
         shall continue and shares shall be issued to participants thereunder as
         provided under,  and subject to the terms and conditions of, such Plan;
         provided,  however,  that if the  Effective  Time  occurs  prior to the
         originally  scheduled  expiration  of such current  offering  period on
         September 30, 1998, then  immediately  prior to the Effective Time, the
         current  offering  period under the Company's  Employee  Stock Purchase
         Plan  shall be  ended,  and each  participant  shall be  deemed to have
         purchased  immediately  prior to the  Effective  Time, to the extent of
         payroll deductions  accumulated by such participant as of such offering
         period end, the number of whole shares of Company Common Stock at a per
         share price  determined  pursuant to the  provisions  of the  Company's
         Employee Stock Purchase Plan, and each participant shall receive a cash
         payment  equal to the  balance,  if any,  of such  accumulated  payroll
         deductions  remaining  after such  purchase of such  shares.  As of the
         Effective  Time,  all such  shares  shall be  converted  in the  manner
         provided  in Section  2.2.  No  offering  periods  under the  Company's
         Employee  Stock  Purchase  Plan  that  are  subsequent  to the  current
         offering period in process as of the date of the Merger Agreement shall
         be commenced,  and, the Company's  Employee Stock Purchase Plan and all
         purchase  rights  thereunder  shall  terminate   effective  as  of  the
         Effective Time.

         2.7  Capitalization  Changes.  If,  between  the  date  of  the  Merger
Agreement and the Effective Time, the outstanding  shares of Parent Common Stock
shall have been changed into a different  number of shares or a different  class
by  reason of any  reclassification,  recapitalization,  split-up,  combination,
exchange of shares, or stock dividend, the Conversion Fraction and all per-share
price  amounts  and  calculations  set forth in the  Merger  Agreement  shall be
appropriately adjusted.



<PAGE>

                                    ARTICLE 3
                    ORGANIZATION OF THE SURVIVING CORPORATION

         3.1  Articles  of  Incorporation  of  the  Surviving  Corporation.  The
Articles of Incorporation of the Company, as the Surviving  Corporation,  shall,
as of the  Effective  Time,  be amended so as to be restated in their  entity to
read as set forth on Schedule A-1 attached to this Plan of Merger.

         3.2  Bylaws  of  the  Surviving  Corporation.   The  Bylaws  of  Merger
Subsidiary,  as in effect  immediately prior to the Effective Time, shall be the
Bylaws of the Surviving  Corporation until thereafter amended in accordance with
applicable law.

         3.3 Directors and Officers of the Surviving Corporation.  The directors
and officers of Merger Subsidiary  immediately prior to the Effective Time shall
be the directors and officers,  respectively, of the Surviving Corporation until
their respective successors shall be duly elected and qualified.


                                    ARTICLE 4
                               GENERAL PROVISIONS

         4.1  Certain  Effects of the  Merger.  As of the  Effective  Time,  the
Company,  as the  Surviving  Corporation,  shall  succeed to and possess all the
rights, privileges, powers, immunities,  franchises,  concessions,  certificates
and  authority,  of a  public  as  well  as a  private  nature,  of  each of the
Constituent Corporations;  and all property, real, personal and mixed, and every
interest  therein,  and all other  choses in action of or belonging to either of
the Constituent  Corporations on whatever account shall be vested in the Company
as the Surviving Corporation, without any further act or deed; and all property,
assets,  rights,  privileges,  powers,  immunities,   franchises,   concessions,
certificates  and authority  shall be thereafter as effectively  the property of
the  Company,  as the  Surviving  Corporation,  as they  were or would be of the
Constituent  Corporations or either of them; and title to any real estate or any
interest  therein  vested by deed or  otherwise  in  either  of the  Constituent
Corporations shall not revert or be in any way impaired by reason of the Merger.

         4.2 Rights and Duties of Surviving  Corporation.  The  Company,  as the
Surviving  Corporation,  shall be  responsible  and  liable  for all the  debts,
liabilities, duties and obligations of each of the Constituent Corporations, and
as of the Effective  Time all such debts,  liabilities,  duties and  obligations
shall attach to the Company, as the Surviving  Corporation,  and may be enforced
against  it to the  same  extent  as if  such  debts,  liabilities,  duties  and
obligations  had been  originally  incurred or  contracted  by it; and any claim
existing or action or proceeding pending by or against either of the Constituent
Corporations may be prosecuted to judgment as if the merger had not taken place;
or the Company, as the Surviving  Corporation,  may be substituted in its place;
and neither the rights of creditors nor any liens upon property of either of the
Constituent Corporations shall be impaired by the merger.

         4.3 Further  Assurances.  If at any time after the  Effective  Time the
Surviving  Corporation  shall  consider or be advised  that any  instruments  of
further  assurance  are  desirable in order to evidence the vesting in it of the
title of either of the Constituent Corporations to any of the property rights of
the Constituent  Corporations,  the appropriate  officers or directors of Merger
Subsidiary and the Company are hereby  authorized to execute,  acknowledge,  and
deliver all such instruments of further  assurance and to do all acts or things,
either in the name of Merger  Subsidiary or the Company,  as may be requisite or
desirable to carry out the provisions hereof.


<PAGE>


                                  Schedule A-1

                       RESTATED ARTICLES OF INCORPORATION
                                       OF
                           AVECOR CARDIOVASCULAR, INC.


                                ARTICLE 1 - NAME

         1.1)  The  name  of  the   corporation   shall  be   Medtronic   AVECOR
Cardiovascular, Inc.


                     ARTICLE 2 - REGISTERED OFFICE AND AGENT

         2.1) The registered office of the corporation in the State of Minnesota
is 405  Second  Aveaue  South,  Minneapolis,  Minnesota  55401.  The name of its
registered agent at such address is CT Corporation System, Inc.


                                ARTICLE 3 - STOCK

         3.1) Authorized  Shares. The aggregate number of shares the corporation
has  authority to issue shall be 2,500 shares of Common  Stock,  $.10 par value.
Holders of Common  Stock  shall be entitled to one vote for each share of Common
Stock held of record.

         3.2)  Issuance  of Shares to Holders of  Another  Class or Series.  The
Board of Directors is authorized to issue shares of the corporation of one class
or series to holders  of that class or series or to holders of another  class or
series to effectuate share dividends or splits.


                       ARTICLE 4 - RIGHTS OF SHAREHOLDERS

         4.1) No  Preemptive  Rights.  No  holder  of any  class of stock of the
corporation  shall be  entitled  to  subscribe  for or  purchase  such  holder's
proportionate  share of stock of any class of the  corporation  now or hereafter
authorized or issued.

         4.2) No Cumulative  Voting Rights.  No shareholder shall be entitled to
cumulate  votes for the election of directors  and there shall be no  cumulative
voting for any purpose whatsoever.

         4.3) Voting  Agreements.  A written  agreement  among  shareholders  or
subscribers for shares to be issued,  relating to the voting of their shares, is
valid and  specifically  enforceable by and against the parties to the agreement
under Section 302A.455 of the Minnesota Statutes.


                     ARTICLE 5 - WRITTEN ACTION BY DIRECTORS

         5.1) Any action  required or permitted  to be taken at a Board  meeting
may be taken by written action signed by all of the directors or, in cases where
the action need not be approved by the shareholders, by written action signed by
the number of  directors  that would be  required  to take the same  action at a
meeting of the Board at which all directors were present.


                  ARTICLE 6 - LIMITATION OF DIRECTOR LIABILITY

                  6.1) A director  of the  corporation  shall not be  personally
liable to the corporation or its shareholders for monetary damages for breach of
fiduciary  duty as a director,  except to the extent  provided by applicable law
(i) for any breach of the director's  duty of loyalty to the  corporation or its
shareholders,  (ii)  for acts or  omissions  not in good  faith or that  involve
intentional  misconduct  or a knowing  violation  of law,  (iii) under  Sections
302A.559  or  80A.23  of the  Minnesota  Statutes,  as  amended,  (iv)  for  any
transaction from which the director derived an improper personal benefit, or (v)
for any act or omission  occurring  prior to the date that this Article  becomes
effective.  No amendment to or repeal of this Article shall apply to or have any
effect on the liability or alleged  liability of any director of the corporation
for or with respect to any acts or omissions of such director occurring prior to
such amendment or repeal.



<PAGE>
                                                                      Appendix B
                          AGREEMENT AND PLAN OF MERGER

                                  BY AND AMONG

                                MEDTRONIC, INC.,

                                AC MERGER CORP.,

                                       AND

                           AVECOR CARDIOVASCULAR, INC.





                                  July 12, 1998


<PAGE>

                               
                                TABLE OF CONTENTS

ARTICLE 1 THE MERGER; CONVERSION OF SHARES...................................B-5
      1.1 The Merger.........................................................B-5
      1.2 Effective Time.....................................................B-5
      1.3 Conversion of Shares...............................................B-6
      1.4 Dissenting Shares..................................................B-7
      1.5 Exchange of Company Common Stock...................................B-7
      1.6 Exchange of Merger Subsidiary Common Stock.........................B-9
      1.7 Stock Options......................................................B-9
      1.8 Capitalization Changes............................................B-10
      1.9 Articles of Incorporation of the Surviving Corporation............B-10
      1.10 Bylaws of the Surviving Corporation..............................B-10
      1.11 Directors and Officers of the Surviving Corporation..............B-11


ARTICLE 2 CLOSING...........................................................B-11
      2.1 Time and Place....................................................B-11
      2.2 Filings at the Closing............................................B-11


ARTICLE 3 REPRESENTATIONS AND WARRANTIES OF THE COMPANY.....................B-11
      3.1 Disclosure Schedule...............................................B-11
      3.2 Organization......................................................B-11
      3.3 Authorization.....................................................B-12
      3.4 Capitalization....................................................B-12
      3.5 Reports and Financial Statements..................................B-13
      3.6 Absence of Undisclosed Liabilities................................B-14
      3.7 Consents and Approvals............................................B-14
      3.8 Compliance with Laws..............................................B-15
      3.9 Litigation........................................................B-15
      3.10 Absence of Material Adverse Changes..............................B-15
      3.11 Environmental Laws and Regulations...............................B-16
      3.12 Officers, Directors and Employees................................B-17
      3.13 Taxes............................................................B-17
      3.14 Contracts........................................................B-18
      3.15 Title to Properties; Liens.......................................B-19
      3.16 Permits, Licenses, Etc...........................................B-19
      3.17 Intellectual Property Rights.....................................B-19
      3.18 Benefit Plans....................................................B-20
      3.19 Minute Books.....................................................B-22
      3.20 Insurance Policies...............................................B-22
      3.21 Bank Accounts....................................................B-22
      3.22 Powers of Attorney...............................................B-22
      3.23 Product Liability Claims.........................................B-22
      3.24 Warranties.......................................................B-22
      3.25 Inventories......................................................B-22
      3.26 Relations with Suppliers and Customers...........................B-23
      3.27 No Finders.......................................................B-23
      3.28 Proxy Statement..................................................B-23
      3.29 Merger Filings...................................................B-23
      3.30 Fairness Opinion.................................................B-24
      3.31 State Takeover Laws..............................................B-24



<PAGE>

ARTICLE 4 REPRESENTATIONS AND WARRANTIES OF PARENT AND MERGER SUBSIDIARY....B-24
      4.1 Organization......................................................B-24
      4.2 Authorization.....................................................B-25
      4.3 Capitalization....................................................B-25
      4.4 Consents and Approvals............................................B-25
      4.5 Reports; Financial Statements; Absence of Changes.................B-26
      4.6 Registration Statement............................................B-27
      4.7 Merger Filings....................................................B-27
      4.8 No Finders........................................................B-27


ARTICLE 5 COVENANTS.........................................................B-27
      5.1 Conduct of Business of the Company................................B-27
      5.2 No Solicitation...................................................B-30
      5.3 Access and Information............................................B-31
      5.4 Approval of Shareholders; Proxy Statement; Registration Statement.B-31
      5.5 Consents..........................................................B-32
      5.6 Affiliates' Letters...............................................B-33
      5.7 Expenses..........................................................B-33
      5.8 Further Actions...................................................B-33
      5.9 Regulatory Approvals..............................................B-33
      5.10 Certain Notifications............................................B-34
      5.11 Voting of Shares.................................................B-34
      5.12 Noncompetition Agreements........................................B-34
      5.13 NYSE Listing Application.........................................B-34
      5.14 Indemnification..................................................B-34
      5.15
      5.16 Subsidiary Shares................................................B-35
      5.17 Stock Option Agreement...........................................B-35
      5.18 Benefit Plans and Employee Matters...............................B-35
      5.19 Tax..............................................................B-35


ARTICLE 6 CLOSING CONDITIONS................................................B-35
      6.1 Conditions to Obligations of Parent, Merger Subsidiary, and the
          Company...........................................................B-35
      6.2 Conditions to Obligations of Parent and Merger Subsidiary.........B-36
      6.3 Conditions to Obligations of the Company..........................B-37


ARTICLE 7 TERMINATION AND ABANDONMENT.......................................B-38
      7.1 Termination.......................................................B-38
      7.2 Effect of Termination.............................................B-39


ARTICLE 8 MISCELLANEOUS.....................................................B-40
      8.1 Amendment and Modification........................................B-40
      8.2 Waiver of Compliance; Consents....................................B-40
      8.3 Investigation; Survival of Representations and Warranties.........B-40
      8.4 Notices...........................................................B-41
      8.5 Assignment........................................................B-42
      8.6 Governing Law.....................................................B-42
      8.7 Counterparts......................................................B-42
      8.8 Knowledge.........................................................B-42
      8.9 Interpretation....................................................B-42
      8.10 Publicity........................................................B-42
      8.11 Entire Agreement.................................................B-42



         EXHIBITS:

      Exhibit A:        Form of Plan of Merger
      Exhibit B:        Form of Affiliate's Letter
      Exhibit C:        Form of Agreement to Facilitate Merger
      Exhibit D:        Form of Noncompetition Agreement
      Exhibit E:        Form of Stock Option Agreement
      Exhibit F:        Form of Opinion of the Company's Counsel
      Exhibit G:        Form of Opinion of Parent's Counsel



<PAGE>

                          AGREEMENT AND PLAN OF MERGER

         THIS  AGREEMENT is dated as of July 12, 1998,  by and among  Medtronic,
Inc.,  a  Minnesota  corporation  ("Parent"),   AC  Merger  Corp.,  a  Minnesota
corporation and  wholly-owned  subsidiary of Parent ("Merger  Subsidiary"),  and
AVECOR Cardiovascular, Inc., a Minnesota corporation (the "Company").

         WHEREAS, the Boards of Directors of Parent, Merger Subsidiary,  and the
Company have approved the merger of Merger  Subsidiary with and into the Company
(the  "Merger")  upon the terms and subject to the  conditions set forth herein;
and

         WHEREAS,  for federal  income tax  purposes,  it is  intended  that the
Merger  shall  qualify  as  a  reorganization  within  the  meaning  of  Section
368(a)(1)(A) and (a)(2)(E) of the Internal Revenue Code of 1986, as amended (the
"Code"); and

         WHEREAS, prior to the execution of the Stock Option Agreement described
in Section 5.17, officers and directors of the Company have, to induce Parent to
execute this  Agreement,  executed and  delivered  to Parent the  Agreements  to
Facilitate Merger described in Section 5.11; and

         WHEREAS, as a further and subsequent  inducement to have Parent execute
this  Agreement,  Parent and the  Company  are  entering  into the Stock  Option
Agreement  described in Section 5.17 hereof after  execution and delivery of the
Agreements to Facilitate Merger described in Section 5.11; and

         WHEREAS,  the parties  hereto  desire to make certain  representations,
warranties,  and agreements in connection  with the Merger and also to prescribe
various conditions to the Merger;

         NOW,  THEREFORE,  in  consideration  of the foregoing  premises and the
mutual representations,  warranties, covenants, and agreements contained herein,
the parties hereto agree as follows:


                                    ARTICLE 1
                        THE MERGER; CONVERSION OF SHARES

         1.1......The  Merger.  Subject  to the  terms  and  conditions  of this
Agreement,  at the  Effective  Time (as defined in Section 1.2  hereof),  Merger
Subsidiary  shall be merged  with and into the  Company in  accordance  with the
provisions of the Minnesota Business Corporation Act (the "MBCA"), whereupon the
separate  corporate  existence of Merger Subsidiary shall cease, and the Company
shall continue as the surviving corporation (the "Surviving Corporation").  From
and after the Effective  Time, the Surviving  Corporation  shall possess all the
rights,   privileges,   powers,  and  franchises  and  be  subject  to  all  the
restrictions, disabilities, and duties of the Company and Merger Subsidiary, all
as more fully described in the MBCA.

         1.2......Effective  Time.  As soon  as  practicable  after  each of the
conditions set forth in Article 6 has been satisfied or waived,  the Company and
Merger  Subsidiary will file, or cause to be filed,  with the Secretary of State
of the State of  Minnesota  Articles  of Merger for the Merger,  which  Articles
shall be in the form required by and executed in accordance  with the applicable
provisions of the MBCA and shall include as a part thereof a plan of merger (the
"Plan of Merger")  substantially  in the form attached  hereto as Exhibit A. The
Merger shall  become  effective at the time such filing is made or, if agreed to
by Parent and the Company,  such later time or date set forth in the Articles of
Merger (the "Effective Time").


<PAGE>

         1.3......Conversion  of Shares. At the Effective Time, by virtue of the
Merger and  without any action on the part of any holder of any share of capital
stock of the Company or Merger Subsidiary:

                  (a) Each share of common stock of the Company,  par value $.01
         per share ("Company Common Stock"),  issued and outstanding immediately
         prior thereto (except for Dissenting  Shares, as defined in Section 1.4
         hereof,  and except for shares  referred to in Section  1.3(b)  hereof)
         shall be  converted  into the right to receive the  fraction of a share
         (subject to adjustment as provided below, the "Conversion Fraction") of
         common  stock of  Parent,  par  value  $.10 per share  ("Parent  Common
         Stock"),  equal to $11.125  divided by the Parent  Average Stock Price.
         The "Parent Average Stock Price" shall mean the average (rounded to the
         nearest full cent, with the cents rounded up if the third decimal place
         is 5 or more) of the  daily  closing  sale  prices of a share of Parent
         Common  Stock as  reported  on the New  York  Stock  Exchange  ("NYSE")
         Composite  Tape,  as reported in The Wall  Street  Journal,  for the 18
         consecutive  NYSE trading days ending on and  including the second NYSE
         trading day immediately preceding the Effective Time.

                  Notwithstanding  the  foregoing,  if the sum of the  number of
         shares of Company  Common Stock  outstanding  immediately  prior to the
         Effective  Time plus the number of shares  subject to then  outstanding
         options,  warrants, or other rights to acquire shares of Company Common
         Stock  (collectively,  "Company Stock  Acquisition  Rights") is greater
         than 8,879,725  shares plus that number of shares issuable  pursuant to
         the current offering period in process as of the date of this Agreement
         under the Company's  Employee  Stock  Purchase Plan or if the aggregate
         exercise  price of all  such  Company  Stock  Acquisition  Rights  then
         outstanding  is less than the  aggregate  exercise  price  reflected in
         Section 3.4 hereof, then the $11.125 amount per share of Company Common
         Stock,  as described  above,  shall be reduced to an amount,  if lower,
         equal to (i) $11.125 times [8,879,725 shares plus that number of shares
         issuable  pursuant to the current  offering period in process as of the
         date of this  Agreement  under the Company's  Employee  Stock  Purchase
         Plan]  minus the  aggregate  exercise  price  reflected  in Section 3.4
         hereof plus the aggregate amount received by the Company as a result of
         any issuance of Company  Common Stock after the date of this  Agreement
         and prior to the Effective  Time plus the aggregate  exercise  price of
         all Company Stock Acquisition Rights  outstanding  immediately prior to
         the Effective  Time divided by (ii) the sum of (A) the number of shares
         of Company Common Stock outstanding  immediately prior to the Effective
         Time plus (B) the number of shares subject to Company Stock Acquisition
         Rights then outstanding.

                  An appropriate adjustment shall similarly be made in the event
         that,  prior to the Effective Time, the  outstanding  shares of Company
         Common Stock, without new consideration,  are changed into or exchanged
         for a different kind of shares or securities  through a reorganization,
         reclassification,  stock  dividend,  stock  combination,  or other like
         change in the Company's capitalization.  Notwithstanding the foregoing,
         nothing in this section shall be deemed to constitute  authorization or
         permission  for or  consent  from  Parent or Merger  Subsidiary  to any
         increase in the number of shares of Company Common Stock outstanding or
         subject  to  outstanding  Company  Stock  Acquisition  Rights,  to  any
         decrease   in  the   exercise   price  of  such   Rights,   or  to  any
         reorganization, reclassification, stock dividend, stock combination, or
         other like change in capitalization.


<PAGE>

                  (b) Each share of Company Common Stock issued and  outstanding
         immediately prior to the Effective Time that is then owned beneficially
         or of record by Parent,  Merger  Subsidiary,  or any direct or indirect
         subsidiary of Parent or the Company shall be cancelled  without payment
         of any consideration therefor and without any conversion thereof.

                  (c) Each  share of any  other  class of  capital  stock of the
         Company  (other than Company  Common Stock) shall be cancelled  without
         payment  of any  consideration  therefor  and  without  any  conversion
         thereof.

                  (d) Each share of common stock of Merger Subsidiary, par value
         $.01  per  share  ("Merger   Subsidiary  Common  Stock"),   issued  and
         outstanding  immediately prior to the Effective Time shall be converted
         into one share of the common stock of the  Surviving  Corporation,  par
         value $.01 per share ("Surviving Corporation Common Stock").

         1.4 Dissenting Shares.  Notwithstanding any provision of this Agreement
to the contrary,  each outstanding  share of Company Common Stock, the holder of
which has demanded and perfected  such holder's right to dissent from the Merger
and to be paid the  fair  value  of such  shares  in  accordance  with  Sections
302A.471  and  302A.473  of the MBCA  and,  as of the  Effective  Time,  has not
effectively  withdrawn or lost such dissenters'  rights  ("Dissenting  Shares"),
shall not be converted  into or  represent a right to receive the Parent  Common
Stock into which  shares of  Company  Common  Stock are  converted  pursuant  to
Section 1.3 hereof, but the holder thereof shall be entitled only to such rights
as are granted by the MBCA.  Parent shall cause the Company to make all payments
to holders of shares of Company  Common  Stock with  respect to such  demands in
accordance  with the MBCA.  The  Company  shall give  Parent (i) prompt  written
notice of any  notice of intent to demand  fair  value for any shares of Company
Common Stock,  withdrawals  of such notices,  and any other  instruments  served
pursuant to the MBCA and received by the Company,  and (ii) the  opportunity  to
conduct jointly all  negotiations  and  proceedings  with respect to demands for
fair value for shares of Company  Common Stock under the MBCA. The Company shall
not, except with the prior written consent of Parent or as otherwise required by
law, voluntarily make any payment with respect to any demands for fair value for
shares of Company Common Stock or offer to settle or settle any such demands.

         1.5      Exchange of Company Common Stock.

                  (a)  Promptly  after the  Effective  Time,  Parent shall cause
         Parent's  stock  transfer  agent or such  other  person as  Parent  may
         appoint to act as exchange agent (the "Exchange Agent") to mail to each
         holder of record (other than Parent,  Merger  Subsidiary,  or any other
         subsidiary of Parent or the Company) of a certificate  or  certificates
         that immediately  prior to the Effective Time  represented  outstanding
         shares of Company Common Stock ("Company  Certificates")  a form letter
         of  transmittal  (which shall specify that delivery shall be effective,
         and risk of loss and title to the  Company  Certificate(s)  shall pass,
         only upon delivery of the Company Certificate(s) to the Exchange Agent)
         and  instructions  for such  holder's use in effecting the surrender of
         the Company  Certificates  in exchange  for  certificates  representing
         shares of Parent Common Stock.

                  (b) As soon as  practicable  after  the  Effective  Time,  the
         Exchange Agent shall  distribute to holders of shares of Company Common
         Stock,  upon  surrender  to the  Exchange  Agent of one or more Company
         Certificates for cancellation,  together with a duly-executed letter of
         transmittal,  (i)  one or more  Parent  certificates  representing  the
         number of whole  shares of Parent  Common  Stock  into which the shares
         represented  by the Company  Certificate(s)  shall have been  converted
         pursuant to Section 1.3(a), and (ii) a bank check in the amount of cash

<PAGE>

         into which the shares represented by the Company  Certificate(s)  shall
         have been converted  pursuant to Section 1.5(f) (relating to fractional
         shares),  and  the  Company  Certificate(s)  so  surrendered  shall  be
         cancelled.  In the event of a transfer of ownership  of Company  Common
         Stock that is not registered in the transfer records of the Company, it
         shall be a condition to the  issuance of shares of Parent  Common Stock
         that the  Company  Certificate(s)  so  surrendered  shall  be  properly
         endorsed  or be  otherwise  in proper form for  transfer  and that such
         transferee  shall (i) pay to the  Exchange  Agent any transfer or other
         taxes required,  or (ii) establish to the  satisfaction of the Exchange
         Agent that such tax has been paid or is not payable.

                  (c)  Holders of Company  Common  Stock will be entitled to any
         dividends or other distributions  pertaining to the Parent Common Stock
         received in exchange  therefor  that become  payable to persons who are
         holders  of record of Parent  Common  Stock as of a record  date on the
         same date as or after the  Effective  Time,  but only  after  they have
         surrendered  their Company  Certificates  for exchange.  Subject to the
         effect,  if any, of applicable  law, the Exchange  Agent shall receive,
         hold, and remit any such dividends or other  distributions to each such
         record holder entitled thereto, without interest, at the time that such
         Company   Certificates  are  surrendered  to  the  Exchange  Agent  for
         exchange.  Holders  of  Company  Common  Stock  will  not be  entitled,
         however, to dividends or other distributions that become payable before
         or after the  Effective  Time to persons who were  holders of record of
         Parent  Common Stock as of a record date that is prior to the Effective
         Time.

                  (d)  All  shares  of  Parent  Common  Stock  issued  upon  the
         surrender for exchange of Company  Common Stock in accordance  with the
         terms hereof (including any cash paid for fractional shares pursuant to
         Section  1.5(f)  hereof)  shall be deemed  to have been  issued in full
         satisfaction of all rights  pertaining to such shares of Company Common
         Stock.

                  (e)  After  the  Effective  Time,  there  shall be no  further
         registration  of transfers on the stock transfer books of the Surviving
         Corporation of the shares of Company Common Stock that were outstanding
         immediately  prior to the Effective Time. If, after the Effective Time,
         Company  Certificates  representing  such shares are  presented  to the
         Surviving  Corporation,  they  shall  be  cancelled  and  exchanged  as
         provided in this Article 1. As of the  Effective  Time,  the holders of
         Company Certificates  representing shares of Company Common Stock shall
         cease to have any rights as  shareholders  of the Company,  except such
         rights,  if any,  as they may have  pursuant  to the  MBCA.  Except  as
         provided  above,  until such Company  Certificates  are surrendered for
         exchange,  each such Company  Certificate  shall,  after the  Effective
         Time,  represent  for all purposes only the right to receive the number
         of whole shares of Parent Common Stock into which the shares of Company
         Common  Stock  shall  have been  converted  pursuant  to the  Merger as
         provided  in Section  1.3(a)  hereof and the right to receive  the cash
         value of any fraction of a share of Parent  Common Stock as provided in
         Section 1.5(f) hereof.

                  (f)  No  fractional  shares  of  Parent  Common  Stock  and no
         certificates or scrip therefor, or other evidence of ownership thereof,
         shall  be  issued   upon  the   surrender   for   exchange  of  Company
         Certificates,  no dividend or other distribution of Parent shall relate
         to any fractional  share, and such fractional share interests shall not
         entitle the owner thereof to vote or to any rights of a shareholder  of
         Parent.  All fractional shares of Parent Common Stock to which a holder
         of Company Common Stock  immediately  prior to the Effective Time would
         otherwise be entitled,  at the Effective  Time,  shall be aggregated if
         and to the extent  multiple  Company  Certificates  of such  holder are

<PAGE>

         submitted together to the Exchange Agent. If a fractional share results
         from such  aggregation,  then (in lieu of such  fractional  share)  the
         Exchange  Agent  shall pay to each  holder of shares of Company  Common
         Stock who otherwise would be entitled to receive such fractional  share
         of Parent Common Stock an amount of cash (without interest)  determined
         by  multiplying  (i)  the  Parent  Average  Stock  Price  by  (ii)  the
         fractional  share of Parent  Common  Stock to which such  holder  would
         otherwise be entitled. Parent will make available to the Exchange Agent
         any cash necessary for this purpose.

                  (g) In the  event any  Company  Certificates  shall  have been
         lost, stolen, or destroyed,  the Exchange Agent shall issue in exchange
         for such lost,  stolen,  or destroyed  Company  Certificates,  upon the
         making of an affidavit of that fact by the holder thereof,  such shares
         of Parent Common Stock and cash for fractional  shares,  if any, as may
         be required pursuant to this Article 1; provided,  however, that Parent
         may, in its  discretion  and as a condition  precedent  to the issuance
         thereof,  require the owner of such lost,  stolen, or destroyed Company
         Certificate  to  deliver  a bond in such sum as  Parent  may  direct as
         indemnity  against  any claim  that may be made  against  Parent or the
         Exchange Agent with respect to such Company Certificate alleged to have
         been lost, stolen, or destroyed.

                  (h) Each person  entitled to receive  shares of Parent  Common
         Stock  pursuant  to this  Article 1 shall  receive  together  with such
         shares the number of Parent  preferred share purchase rights  (pursuant
         to the Rights  Agreement dated as of June 27, 1991,  between Parent and
         Norwest Bank  Minnesota,  N.A.,  the "Parent Rights Plan") per share of
         Parent  Common  Stock  equal to the  number of Parent  preferred  share
         purchase rights associated with one share of Parent Common Stock at the
         Effective Time.

         1.6  Exchange of Merger  Subsidiary  Common  Stock.  From and after the
Effective Time, each outstanding  certificate previously  representing shares of
Merger  Subsidiary  Common  Stock  shall be deemed for all  purposes to evidence
ownership  of and to  represent  the number of shares of  Surviving  Corporation
Common Stock into which such shares of Merger Subsidiary Common Stock shall have
been  converted.  Promptly after the Effective  Time, the Surviving  Corporation
shall issue to Parent a stock  certificate  or  certificates  representing  such
shares of Surviving  Corporation Common Stock in exchange for the certificate or
certificates that formerly represented shares of Merger Subsidiary Common Stock,
which shall be cancelled.

         1.7      Stock Options.

                  (a) Except as  provided  below with  respect to the  Company's
         Employee Stock Purchase Plan, each option to purchase shares of Company
         Common  Stock that is  outstanding  at the  Effective  Time (a "Company
         Option")  shall,  by virtue of the Merger and without any action on the
         part of the holder  thereof,  be assumed by Parent (and a  registration
         statement  on Form  S-8  therefor  shall be filed  promptly  after  the
         Effective  Time)  in  such  manner  that  Parent  (i) is a  corporation
         "assuming  a stock  option in a  transaction  to which  Section  424(a)
         applies"  within  the  meaning  of  Section  424 of the  Code  and  the
         regulations  thereunder  or (ii) to the extent that  Section 424 of the
         Code  does  not  apply  to any  such  Company  Option,  would be such a
         corporation  were  Section 424 of the Code  applicable  to such Company
         Option.  From and after  the  Effective  Time,  all  references  to the
         Company  in the  Company  Options  shall be  deemed  to refer to Parent

<PAGE>

         (other than for purposes of determining whether there has been a change
         in control of the Company). The Company Options assumed by Parent shall
         be exercisable  upon the same terms and conditions as under the Company
         Options  (including   provisions  thereof,  if  any,  relating  to  the
         acceleration of vesting upon a change in control of the Company) except
         that (i) such Company Options shall entitle the holder to purchase from
         Parent  the number of shares of Parent  Common  Stock  (rounded  to the
         nearest  whole  number of such  shares)  that equals the product of the
         Conversion  Fraction  multiplied  by the  number of  shares of  Company
         Common Stock subject to such option  immediately prior to the Effective
         Time,  and (ii) the option  exercise  price per share of Parent  Common
         Stock shall be an amount  (rounded  to the nearest  full cent) equal to
         the option  exercise  price per share of Company Common Stock in effect
         immediately  prior to the  Effective  Time  divided  by the  Conversion
         Fraction;  provided, however, that in the case of any Company Option to
         which  Section 421 of the Code  applies by reason of its  qualification
         under Section 422 of the Code ("incentive  stock options"),  the option
         price, the number of shares purchasable pursuant to such option and the
         terms and conditions of exercise of such options shall be determined in
         order to  comply  with  Section  424(a)  of the Code.  As  promptly  as
         practicable after the Effective Time, Parent shall issue to each holder
         of a Company Option a written  instrument  informing such holder of the
         assumption by Parent of such Company Option.

                  (b) The current  offering  period in process as of the date of
         this Agreement  under the Company's  Employee Stock Purchase Plan shall
         continue  and  shares  shall be issued to  participants  thereunder  as
         provided under,  and subject to the terms and conditions of, such Plan;
         provided,  however,  that if the  Effective  Time  occurs  prior to the
         originally  scheduled  expiration  of such current  offering  period on
         September 30, 1998, then immediately  prior to the Effective Time, such
         current  offering  period under the Company's  Employee  Stock Purchase
         Plan  shall be  ended,  and each  participant  shall be  deemed to have
         purchased  immediately  prior to the  Effective  Time, to the extent of
         payroll deductions  accumulated by such participant as of such offering
         period end, the number of whole shares of Company Common Stock at a per
         share price  determined  pursuant to the  provisions  of the  Company's
         Employee Stock Purchase Plan, and each participant shall receive a cash
         payment  equal to the  balance,  if any,  of such  accumulated  payroll
         deductions  remaining  after such  purchase of such  shares.  As of the
         Effective  Time,  all such  shares  shall be  converted  in the  manner
         provided  in Section  1.3.  No  offering  periods  under the  Company's
         Employee  Stock  Purchase  Plan  that  are  subsequent  to the  current
         offering  period in process as of the date of this  Agreement  shall be
         commenced,  and the  Company's  Employee  Stock  Purchase  Plan and all
         purchase  rights  thereunder  shall  terminate   effective  as  of  the
         Effective Time.

         1.8 Capitalization  Changes. If, between the date of this Agreement and
the Effective  Time,  the  outstanding  shares of Parent Common Stock shall have
been changed into a different number of shares or a different class by reason of
any  reclassification,  recapitalization,  split-up,  combination,  exchange  of
shares,  or stock  dividend,  the  Conversion  Fraction and all per-share  price
amounts and  calculations  set forth in this  Agreement  shall be  appropriately
adjusted.

         1.9  Articles  of  Incorporation  of  the  Surviving  Corporation.  The
Articles of Incorporation of Merger  Subsidiary,  as in effect immediately prior
to the Effective Time,  shall be the Articles of  Incorporation of the Surviving
Corporation  until  thereafter   amended  in  accordance  with  applicable  law;
provided,  however,  that upon the Effective Time,  Article 1 of the Articles of
Incorporation  of the  Surviving  Corporation  shall be  amended  to read in its
entirety as follows:  "The name of the  corporation  shall be  Medtronic  AVECOR
Cardiovascular, Inc."

         1.10  Bylaws  of  the  Surviving  Corporation.  The  Bylaws  of  Merger
Subsidiary,  as in effect  immediately prior to the Effective Time, shall be the
Bylaws of the Surviving  Corporation until thereafter amended in accordance with
applicable law.


<PAGE>

         1.11 Directors and Officers of the Surviving Corporation. The directors
and officers of Merger Subsidiary  immediately prior to the Effective Time shall
be the directors and officers,  respectively, of the Surviving Corporation until
their respective successors shall be duly elected and qualified.


                                    ARTICLE 2
                                     CLOSING

         2.1 Time and  Place.  Subject  to the  satisfaction  or  waiver  of the
provisions  of Article 6, the closing of the Merger (the  "Closing")  shall take
place at 10:00  a.m.,  local  time,  on the day the  Merger is  approved  by the
shareholders of the Company at the Company  Shareholders  Meeting (as defined in
Section 5.4 hereof),  or as soon  thereafter  as all  conditions to Closing have
been  satisfied  or waived,  or on such other date  and/or at such other time as
Parent  and the  Company  may  mutually  agree.  The date on which  the  Closing
actually  occurs is herein  referred to as the "Closing Date." The Closing shall
take place at the  corporate  headquarters  offices of Parent,  or at such other
place or in such other manner  (e.g.,  by telecopy  exchange of signature  pages
with originals to follow by overnight delivery) as the parties hereto may agree.

         2.2 Filings at the Closing.  At the Closing,  subject to the provisions
of Article 6, Parent, Merger Subsidiary, and the Company shall cause Articles of
Merger to be filed in accordance with the provisions of Section  302A.615 of the
MBCA,  and take any and all other lawful actions and do any and all other lawful
things necessary to cause the Merger to become effective.


                                    ARTICLE 3
                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         The Company  represents and warrants to Parent and Merger Subsidiary as
of the date hereof as follows:

         3.1  Disclosure  Schedule.  As of the date hereof,  the Company has not
completed its internal  investigation  and review for purposes of confirming and
verifying the  representations  and warranties of the Company  contained in this
Agreement.  On or prior to the close of business on the tenth business day after
the date hereof, the Company shall deliver to Parent a disclosure schedule ( the
"Disclosure  Schedule") with each disclosure therein set forth in the section or
subsection  which  corresponds  by  number  for  purposes  of  exceptions  to  a
representation  or  warranty to the  applicable  section or  subsection  of this
Article 3. In the event that  Parent  determines  that the  Disclosure  Schedule
contains information which in Parent's good faith,  reasonable business judgment
adversely affects the value of the Company's business or prospects,  then Parent
shall have the right,  within 10  business  days of the  receipt of the full and
complete  Disclosure  Schedule,  to  terminate  this  Agreement  as set forth in
Section 7.1(i) hereto.

         3.2  Organization.  The  Company  and each  subsidiary  of the  Company
(referred to herein as a "Subsidiary") is a corporation duly organized,  validly
existing, and in good standing under the laws of its respective  jurisdiction of
incorporation and has all requisite corporate power and authority to own, lease,
and operate its properties and to carry on its business as now being  conducted.
The Company and each  Subsidiary  is duly  qualified  and in good standing to do
business in each  jurisdiction in which the property owned,  leased, or operated

<PAGE>

by it or the nature of the  business  conducted  by it makes such  qualification
necessary and where the failure to qualify could  reasonably be expected to have
a Company Material Adverse Effect (as defined below).  "Company Material Adverse
Effect" means any effect, change or event that, individually or in the aggregate
with all similar effects,  changes or events, is or would reasonably be expected
to be material and adverse: (i) either before or immediately after the Effective
Time,  to the  business,  properties,  liabilities,  results  of  operation,  or
financial condition of the Company and its Subsidiaries,  considered as a whole;
or (ii) to the Company's  ability to perform any of its  obligations  under this
Agreement or to consummate the Merger; provided,  however, that Company Material
Adverse Effect shall not be deemed to include the impact of actions or omissions
of the Company taken with the prior written  consent of Parent in  contemplation
of the transactions  contemplated  hereby,  or the effects of the Merger (or any
announcement  with respect  thereto) and compliance  with the provisions of this
Agreement  on the  operating  performance  or  prospects  of the Company and its
subsidiaries,  including  without  limitation,  any  such  loss of  customer  or
distributor relationships or employees following the announcement of the Merger.
The  jurisdictions  in which the Company and each  Subsidiary  are qualified are
listed on the  Disclosure  Schedule.  The Company has  heretofore  delivered  to
Parent complete and accurate copies of the Articles of Incorporation  and Bylaws
of the Company and each Subsidiary, as currently in effect. Except to the extent
specifically  disclosed on the Disclosure  Schedule,  or any entity in which the
Company owns, directly or indirectly,  an equity interest of less than 1% of the
fair market value of such entity's  outstanding equity  securities,  neither the
Company nor any Subsidiary,  directly or indirectly, owns or controls or has any
capital, equity, partnership,  participation, or other ownership interest in any
corporation,  partnership,  joint  venture,  or other  business  association  or
entity.

         3.3  Authorization.  The Company has the requisite  corporate power and
authority to execute and deliver this  Agreement  and,  subject to obtaining the
necessary  approval  of its  shareholders,  the  requisite  corporate  power and
authority to consummate the transactions  contemplated  hereby,  and to file and
distribute  the Proxy  Statement/Prospectus  (as defined in Section 5.4 hereof).
The execution and delivery of this Agreement by the Company and the consummation
of the transactions  contemplated  hereby have been duly and validly  authorized
and approved by the Company's Board of Directors and, in accordance with Section
302A.673 of the MBCA, by the required  committee of such Board of Directors,  no
other  corporate  proceedings  on the part of the Company or any  Subsidiary are
necessary to authorize this Agreement, and, subject to obtaining the approval of
the Company's shareholders, no other corporate action on the part of the Company
or any  Subsidiary  is necessary to  consummate  the  transactions  contemplated
hereby.  This Agreement has been duly and validly  executed and delivered by the
Company  and  constitutes  the  valid and  binding  obligation  of the  Company,
enforceable against the Company in accordance with its terms, subject to laws of
general  application   relating  to  bankruptcy,   insolvency,   reorganization,
moratorium or other similar laws affecting creditors' rights generally and rules
of law governing  specific  performance,  injunctive  relief, or other equitable
remedies.  To the Company's  knowledge,  each Agreement to Facilitate Merger and
Affiliate's  Letter (as  described  in Sections  5.11 and 5.6) has been duly and
validly executed and delivered by the Company shareholder who is a party thereto
and  constitutes  the  valid  and  binding   obligation  of  such   shareholder,
enforceable in accordance with its terms, subject to laws of general application
relating to bankruptcy, insolvency, reorganization,  moratorium or other similar
laws affecting  creditors' rights generally and rules of law governing  specific
performance, injunctive relief, or other equitable remedies.

         3.4  Capitalization.  The  authorized  capital  stock  of  the  Company
consists of (i) 20,000,000  shares of Company  Common Stock,  par value $.01 per
share, of which 8,044,475 shares are issued and outstanding,  and (ii) 2,000,000
shares of Company  Preferred Stock, par value $.01 per share,  including 200,000
shares  of  Series  A  Junior  Preferred  Stock,  none of which  are  issued  or
outstanding.  Except as set forth on the  Disclosure  Schedule,  all  issued and
outstanding  shares of capital stock of each Subsidiary are owned,  beneficially
and of  record,  by the  Company,  free and clear of any Liens  (as  defined  in
Section 3.15).  All issued and  outstanding  shares of Company Common Stock have
been validly issued, are fully paid and nonassessable,  and have not been issued

<PAGE>

in violation of and are not currently subject to any preemptive  rights.  Except
as set forth on the  Disclosure  Schedule  and except for options to purchase an
aggregate 832,250 shares of Company Common Stock at an aggregate  exercise price
of $8,005,782  granted  pursuant to the Company's 1991 Stock  Incentive Plan and
1995  Non-Employee  Director  Option Plan  (collectively,  the  "Company  Option
Plans")  listed,   together  with  their  respective  exercise  prices,  on  the
Disclosure  Schedule,  and except for the rights to purchase under the Company's
Employee  Stock  Purchase Plan shares of Company  Common Stock  (estimated to be
approximately 10,000 shares, at a per share price of $7.44, based on the current
contribution  rates of the participants,  as listed on the Disclosure  Schedule,
and assuming the current Plan offering  period in process as of the date of this
Agreement is ended on September  30, 1998 for this  purpose),  there are not any
outstanding  or authorized  subscriptions,  options,  warrants,  calls,  rights,
convertible securities,  commitments,  restrictions,  arrangements, or any other
agreements  of any  character to which the Company or any  Subsidiary is a party
that,  directly or  indirectly,  (i) obligate the Company or any  Subsidiary  to
issue  any  shares of  capital  stock or any  securities  convertible  into,  or
exercisable or  exchangeable  for, or evidencing the right to subscribe for, any
shares of capital stock, (ii) call for or relate to the sale, pledge,  transfer,
or other  disposition  or  encumbrance  by the Company or any  Subsidiary of any
shares of its capital stock, or (iii) to the knowledge of the Company, relate to
the voting or control of such capital stock. The Disclosure  Schedule sets forth
a complete and accurate list of all stock options, warrants, and other rights to
acquire  Company  Common Stock,  including  the name of the holder,  the date of
grant,  acquisition  price,  expiration date,  number of shares,  exercisability
schedule,  and, in the case of options,  the type of option under the Code.  The
Disclosure  Schedule also sets forth the  contractual  restrictions to which any
shares of Company  Common Stock issued  pursuant to the Company  Option Plans or
otherwise are currently  subject and also sets forth the  restrictions  to which
such shares will be subject  immediately after the Effective Time, other than as
set forth in the Company Option Plans or stock option agreements thereunder.  No
consent of holders or  participants  under the Company  Option Plans or Employee
Stock  Purchase Plan is required to carry out the provisions of Section 1.7. All
actions,  if any,  required on the part of the Company under the Company  Option
Plans or Employee  Stock  Purchase  Plan to allow for the  treatment  of Company
Options and the Employee  Stock Purchase Plan as is provided in Section 1.7, has
been,  or prior to the Closing will be,  validly  taken by the Company,  and the
Company  will not from and after the date hereof  allow any increase in the rate
of a  participant's  contributions  to the Employee Stock Purchase Plan, any new
enrollments or  re-enrollments  in the current  offering period in process as of
the date of this Agreement  under such Plan or the  commencement of any offering
periods under such Plan subsequent to the current  offering period in process as
of the date of this Agreement.

         3.5 Reports and Financial Statements.  The Company has filed all forms,
reports,  registration statements, and documents required to be filed by it with
the  Securities  and Exchange  Commission  ("SEC")  since  January 1, 1995 (such
forms,  reports,  registration  statements,  and  documents,  together  with any
amendments thereto,  are referred to as the "Company SEC Filings").  As of their
respective  dates,  the  Company  SEC  Filings  (i)  complied  as to form in all
material respects with the applicable requirements of the Securities Act of 1933
and the rules and  regulations  thereunder  (the "1933 Act") and the  Securities
Exchange Act of 1934 and the rules and regulations  thereunder (the "1934 Act"),
as the case may be, and (ii) did not contain any untrue  statement of a material
fact or omit to state a material fact required to be stated therein or necessary
to make the statements made therein,  in light of the circumstances  under which
they were made, not misleading.  The audited financial  statements and unaudited
interim  financial  statements  included or  incorporated  by  reference  in the
Company  SEC  Filings,  including  but  not  limited  to the  Company's  audited
financial  statements at and for the year ended  December 31, 1997 (the "Company
1997  Financials"),  (i) were prepared in  accordance  with  generally  accepted
accounting  principles applied on a consistent basis during the periods involved
(except as may be indicated  therein or in the notes thereto),  subject,  in the
case of unaudited interim financial  statements,  to the absence of notes and to
year-end adjustments, (ii) complied as of their respective dates in all material
respects with  applicable  accounting  requirements  and the published rules and

<PAGE>

regulations  of the SEC with respect  thereto,  and (iii) fairly  presented  the
consolidated  financial  position of the Company as of the dates thereof and the
income,  cash  flows,  and  changes  in  shareholders'  equity  for the  periods
involved.  The  statements  of earnings  included  in the  audited or  unaudited
interim financial statements in the Company SEC Filings do not contain any items
of special or nonrecurring income or any other income not earned in the ordinary
course of business, except as expressly specified in the applicable statement of
operations or notes thereto. Prior to the date hereof, the Company has delivered
to Parent  complete and accurate copies of all Company SEC Filings since January
1, 1995. The Company has also delivered to Parent  complete and accurate  copies
of all  statements on Schedule 13D and Schedule 13G known to the Company to have
been filed with the SEC since January 1, 1997,  with respect to capital stock of
the Company. Since January 1, 1997, the Company has filed in a timely manner all
reports  required to be filed by it pursuant to Sections 13, 14, or 15(d) of the
1934 Act.

         3.6  Absence  of   Undisclosed   Liabilities.   Except  to  the  extent
specifically  disclosed on the Disclosure Schedule,  neither the Company nor any
Subsidiary has any liabilities or obligations of any nature  (whether  absolute,
accrued,  contingent,  or otherwise) which would have a Company Material Adverse
Effect  except (a)  liabilities  or  obligations  that are  accrued or  reserved
against in the audited  consolidated balance sheet of the Company as of December
31, 1997 contained in the Company 1997 Financials (the "Company  Audited Balance
Sheet") or in the  unaudited  consolidated  balance  sheet of the  Company as of
March 31, 1998 contained in the Company's  Quarterly Report on Form 10-Q for the
fiscal quarter ended March 31, 1998 (the "Company Interim Balance  Sheet"),  and
(b) liabilities or obligations disclosed in this Agreement.

         3.7 Consents and Approvals.  Except for (i) any applicable requirements
of the 1933 Act, the 1934 Act,  state  securities  laws,  the  Hart-Scott-Rodino
Antitrust  Improvements  Act of 1976 and the  regulations  thereunder  (the "HSR
Act"), and the antitrust,  competition,  foreign investment,  or similar laws of
any foreign  countries  or  supranational  commissions  or boards  that  require
pre-merger  notifications  or filings with respect to the Merger  (collectively,
"Foreign Merger Laws"), (ii) approval by the Company's  shareholders,  (iii) the
filing and recordation of appropriate  merger documents as required by the MBCA,
(iv)  compliance  with  Sections  302A.471  and  302A.473 of the MBCA  regarding
dissenters' rights, or (v) any items disclosed on the Disclosure  Schedule,  the
execution and delivery of this  Agreement and the Stock Option  Agreement by the
Company,  and, to the  Company's  knowledge,  the  execution and delivery of the
Agreements  to  Facilitate  Merger,  and the  consummation  of the  transactions
contemplated  hereby and thereby  will not:  (a) violate  any  provision  of the
Articles  of  Incorporation  or Bylaws of the  Company  or any  Subsidiary;  (b)
violate any statute, rule, regulation,  order, or decree of any federal,  state,
local, or foreign body or authority (including, but not limited to, the Food and
Drug Administration (the "FDA") or any nongovernmental  self-regulatory  agency)
by which the Company or any Subsidiary or any of their respective  properties or
assets may be bound; (c) require any filing with or permit, consent, or approval
of any federal,  state,  local, or foreign public body or authority  (including,
but not limited to, the FDA or any nongovernmental  self-regulatory  agency); or
(d) result in any  violation  or breach of, or  constitute  (with or without due
notice  or lapse of time or both) a  default  under,  result  in the loss of any
material benefit under, or give rise to any right of termination,  cancellation,
increased payments, or acceleration under, or result in the creation of any Lien
(as defined in Section  3.15) on any of the  properties or assets of the Company
or any  Subsidiary  under,  any of the terms,  conditions,  or provisions of any

<PAGE>

note, bond, mortgage,  indenture,  license,  franchise,  permit,  authorization,
agreement,  or other  instrument  or  obligation  to which  the  Company  or any
Subsidiary is a party,  or by which it or any of its properties or assets may be
bound,  except,  (x) in the cases of clauses (b) or (c),  where such  violation,
failure to make any such  filing or failure to obtain  such  permit,  consent or
approval,  would not prevent or delay  consummation  of this Merger or otherwise
prevent the Company from  performing  its  obligations  under this Agreement and
would not have a Company Material Adverse Effect,  and (y) in the case of clause
(d), for any such  violations,  breaches,  defaults,  or other  occurrences that
would not prevent or delay consummation of any of the transactions  contemplated
hereby in any material respect, or otherwise prevent the Company from performing
its obligations under this Agreement in any material respect, and would not have
a Company Material Adverse Effect.

         3.8 Compliance with Laws. Except to the extent  specifically  disclosed
on the Disclosure  Schedule,  all activities of the Company and each  Subsidiary
have been, and are currently being,  conducted in compliance with all applicable
federal,   state,   local,   and   foreign   laws,   ordinances,    regulations,
interpretations,    judgments,   decrees,   injunctions,    permits,   licenses,
certificates,  governmental requirements (including, but not limited to FDA Good
Manufacturing Practices),  orders, and other similar items of any court or other
governmental  entity  (including,  but not limited  to,  those of the FDA or any
nongovernmental  self-regulatory agency), the failure to comply with which could
reasonably be expected to have a Company  Material  Adverse Effect.  The Company
and each  Subsidiary has timely filed or otherwise  provided all  registrations,
reports,  data,  and other  information  and  applications  with  respect to its
medical device, pharmaceutical,  consumer, health care, and other governmentally
regulated  products  (the  "Regulated  Products")  required  to be filed with or
otherwise  provided to the FDA or any other federal,  state,  local,  or foreign
governmental authorities with jurisdiction over the manufacture, use, or sale of
the  Regulated  Products,  and all  regulatory  licenses or approvals in respect
thereof  are in full force and effect,  except  where the failure to file timely
such registrations,  reports, data, information, and applications or the failure
to have such  licenses  and  approvals in full force and effect would not have a
Company Material Adverse Effect.

         3.9  Litigation.  Except to the extent  specifically  disclosed  on the
Disclosure Schedule,  to the Company's knowledge,  no investigation or review by
any federal,  state,  local,  or foreign body or authority  (including,  but not
limited to, the FDA or any nongovernmental  self-regulatory agency) with respect
to the Company or any Subsidiary is pending or threatened, nor has any such body
or  authority  (including,  but not limited  to, the FDA or any  nongovernmental
self-regulatory  agency) indicated to the Company or any Subsidiary an intention
to  conduct  the  same.  Except  to the  extent  specifically  disclosed  on the
Disclosure Schedule,  there are no claims, actions, suits, or proceedings by any
private  party that could  reasonably  be  expected to involve  individually  an
amount in excess of $50,000 or  collectively  an  aggregate  amount in excess of
$200,000, or by any governmental body or authority  (including,  but not limited
to, the FDA or any nongovernmental self-regulatory agency), against or affecting
the Company or any  Subsidiary,  pending or, to the  knowledge  of the  Company,
threatened at law or in equity, or before any federal, state, local, foreign, or
other  governmental   department,   commission,   board,   bureau,   agency,  or
instrumentality  (including,  but not limited to, the FDA or any nongovernmental
self-regulatory agency).

         3.10  Absence  of  Material  Adverse  Changes.  Except  to  the  extent
specifically disclosed in the Disclosure Schedule, since December 31, 1997 there
has not been any (a) change or circumstance that could reasonably be expected to
have a  Company  Material  Adverse  Effect;  (b)  action by the  Company  or any
Subsidiary that, if taken on or after the date of this Agreement,  would require
the  consent or approval  of Parent  pursuant to Section 5.1 hereof,  except for
actions as to which  consent or approval  has been given as provided  therein or
actions prior to March 31, 1998; (c) damage,  destruction,  or loss,  whether or
not covered by  insurance,  that could  reasonably be expected to have a Company
Material  Adverse  Effect;  (d)  change  by the  Company  or any  Subsidiary  in
accounting methods or principles used for financial reporting  purposes,  except
as  required  by a  change  in  generally  accepted  accounting  principles  and

<PAGE>

concurred  with  by  the  Company's  independent  public  accountants;   or  (e)
agreement,  whether in writing or  otherwise,  to take any action  described  or
referenced in this Section 3.10.

         3.11  Environmental  Laws  and  Regulations.  The  Disclosure  Schedule
completely  and  accurately  sets  forth  the  following:  (a)  a  list  of  all
above-ground  storage tanks or underground storage tanks for Hazardous Materials
(as  defined  below)  on real  property  now or at any time in the  past  owned,
leased,  or  occupied  by the  Company or any  Subsidiary  (such  real  property
referred to in this  section as the "Real  Property");  (b) the  identity of any
Hazardous Materials (as defined below) used, generated,  transported or disposed
of by the  Company or any  Subsidiary  now or at any time in the past,  together
with a brief  description  and location of each  activity  using such  Hazardous
Materials;  (c) a summary of the identity of, to the  Company's  knowledge,  any
Hazardous  Materials  that have been disposed of or found on, above or below any
Real  Property;  and  (d) a list  of all  reports,  studies,  and  tests  in the
possession  of the Company or any  Subsidiary or initiated by the Company or any
Subsidiary  pertaining  to the existence of Hazardous  Materials  on, above,  or
below any Real Property or any property  adjoining or which could  reasonably be
expected to affect the Real Property, or concerning compliance with or liability
under the Regulations (as defined below).  The Company has heretofore  delivered
to Parent complete and accurate copies of such reports, studies, and tests.

         The Company and each Subsidiary  have obtained,  and maintained in full
force and effect,  all  required  environmental  permits and other  governmental
approvals  and are in compliance  with all  applicable  Regulations  (as defined
below),  except  where  the  failure  to  so  obtain  and  maintain  or to be in
compliance would not have a Company Material Adverse Effect. Neither the Company
nor any Subsidiary (i) has received a written notice or Claim (as defined below)
alleging  potential  liability  under  any  of the  Regulations  or  alleging  a
violation of the  Regulations  or (ii) has any  knowledge  that such a notice or
Claim may be issued in the future.  Neither the Company nor any  Subsidiary  has
any  knowledge  of any  notices  to or  Claims  against  any  persons,  alleging
potential  liability  under  any of the  Regulations  with  respect  to the Real
Property or any adjoining  properties  or which could  reasonably be expected to
affect the Real Property. Neither the Company nor any Subsidiary (i) has been or
is presently subject to or, to the knowledge of the Company, threatened with any
administrative or judicial proceeding  pursuant to the Regulations,  or (ii) has
any  information  that it may be subject to or, to the knowledge of the Company,
threatened  with such a  proceeding  in the future.  Neither the Company nor any
Subsidiary  has  knowledge  of  any  conditions  or  circumstances   that  could
reasonably be expected to result in the  determination of liability  against the
Company or any Subsidiary  relating to  environmental  matters that would have a
Company  Material  Adverse  Effect,  including,  but not  limited  to, any Claim
arising from past or present  environmental  practices with respect to Hazardous
Materials,  the Real Property,  or any disposal  sites.  To the knowledge of the
Company,  and  except  as  allowed  under  applicable  Laws or  Regulations,  no
Hazardous  Materials have been or are threatened to be discharged,  emitted,  or
released into the air,  water,  soil, or subsurface at or from the Real Property
by the Company.

         For purposes of this Section 3.11,  the following  terms shall have the
following meanings: (i) "Hazardous Materials" means asbestos, urea formaldehyde,
polychlorinated   biphenyls,   nuclear  fuel  or  materials,   chemical   waste,
radioactive materials,  explosives, known human carcinogens,  petroleum products
or other substances or materials listed,  identified,  or designated as toxic or
hazardous or as a pollutant or contaminant  in, or the use,  release or disposal
of  which is  regulated  by,  the  Regulations;  (ii)  "Regulations"  means  the
Comprehensive  Environmental  Response Compensation and Liability Act ("CERCLA")
as amended by the Superfund Amendments and Reauthorization Act of 1986 ("SARA"),
42 U.S.C.  ss.ss.  9601 et seq.; the Federal Resource  Conservation and Recovery
Act of 1976  ("RCRA"),  42 U.S.C.  ss.ss.  6901 et seq.; the Clean Water Act, 33
U.S.C.  ss.ss.  1321 et seq.; the Clean Air Act, 42 U.S.C.  ss.ss. 7401 et seq.,

<PAGE>

and any other federal,  state,  county,  local,  foreign,  or other governmental
statute,  regulation,  or  ordinance,  as  adopted  and in effect as of the date
hereof,  that  relates  to or deals  with  employee  safety  and  human  health,
pollution,  health, or the environment  including,  but not limited to, the use,
generation, discharge,  transportation,  disposal, recordkeeping,  notification,
and  reporting  of  Hazardous  Materials;  and (iii)  "Claim"  means any and all
claims,  demands,  causes  of  actions,   suits,   proceedings,   administrative
proceedings,  losses,  judgments,  decrees, debts, damages,  liabilities,  court
costs,  penalties,  attorneys' fees, and any other expenses incurred,  assessed,
sustained or alleged by or against the Company or any Subsidiary.

         3.12 Officers,  Directors and Employees.  Prior to the date hereof, the
Company has provided to Parent a list that  completely and accurately sets forth
the name and current  annual  salary rate of each officer or exempt  employee of
the Company or any Subsidiary whose total  remuneration for the last fiscal year
was,  or for the  current  fiscal  year has been set at, in  excess of  $50,000,
together with a summary of the bonuses, commissions and additional compensation,
if any,  paid or payable to such  persons for the last fiscal year and  proposed
for the current fiscal year. The Disclosure  Schedule  completely and accurately
sets  forth (i) the names of all  former  employees  whose  employment  with the
Company or any  Subsidiary has terminated  either  voluntarily or  involuntarily
during the preceding  12-month period;  and (ii) the names of the officers (with
all  positions  and titles  indicated)  and  directors  of the  Company and each
Subsidiary.  No unfair  labor  practice  complaint  against  the  Company or any
Subsidiary is pending before the National Labor Relations Board, and there is no
labor strike,  slowdown or stoppage pending or, to the knowledge of the Company,
threatened against or involving the Company or any Subsidiary.  Since January 1,
1995, no unionizing efforts have, to the knowledge of the Company,  been made by
employees  of the  Company  or any  Subsidiary,  neither  the  Company  nor  any
Subsidiary is a party to or subject to any collective bargaining agreement,  and
no collective  bargaining agreement is currently being negotiated by the Company
or any  Subsidiary.  There is no  material  labor  dispute  pending  or,  to the
knowledge of the Company,  threatened  between the Company or any Subsidiary and
its employees.

         3.13 Taxes. The Company has previously furnished to Parent complete and
accurate copies of all tax or assessment  reports and tax returns (including any
applicable  information  returns)  required  by any law or  regulation  (whether
United States,  foreign,  state,  local, or other jurisdiction) and filed by the
Company for each of the three fiscal years ended  December 31, 1995,  1996,  and
1997 and of all such returns filed separately by any Subsidiary for fiscal years
ended during or after 1995. The Company and each  Subsidiary  has filed,  or has
obtained  extensions to file (which extensions have not expired without filing),
all state,  local,  United  States,  foreign,  or other tax  reports and returns
required to be filed by any of them.  The Company and each  Subsidiary  has duly
paid, or accrued on its books of account,  all taxes (including estimated taxes)
shown as due on such  reports  and  returns  (or such  extension  requests),  or
assessed against it, or that it is obligated to withhold from amounts owed by it
to any person.  The  liabilities and reserves for taxes reflected on the Company
Audited Balance Sheet or the Company Interim Balance Sheet are adequate to cover
all taxes payable by the Company and its  Subsidiaries  for all taxable  periods
and portions  thereof ending on or before the dates thereof.  There are no Liens
(as defined in Section 3.14) for taxes upon any property or asset of the Company
or any  Subsidiary.  Neither the Company nor any Subsidiary is delinquent in the
payment of any tax  assessment  (including,  but not limited to, any  applicable
withholding taxes). None of the tax returns or reports for the tax periods ended
December 31,  1995,  1996,  and 1997 have been  audited by the Internal  Revenue
Service (the "IRS") or by any other taxing authority.  Further, to the knowledge
of the  Company,  except as set forth in the  Disclosure  Schedule,  no state of
facts  exists or has existed  that could  reasonably  be expected to subject the
Company  or  any  Subsidiary  to an  additional  tax  liability  for  any  taxes
assessable by either the IRS or any separate  state,  local,  foreign,  or other
taxing  authority  with respect to any reports or returns filed on or before the
date hereof (other than extension requests for which returns have not been filed
as of the date  hereof)  that  would  have a Company  Material  Adverse  Effect.

<PAGE>

Neither  the  Company  nor any  Subsidiary  has,  with  regard to any  assets or
property held, acquired or to be acquired by any of them, filed a consent to the
application of Section 341(f)(2) of the Code. Except to the extent  specifically
disclosed on the Disclosure Schedule, neither the Company nor any Subsidiary has
(i) received  notification of any pending or proposed  examination by either the
IRS or any state,  local,  foreign,  or other taxing  authority,  (ii)  received
notification  of any  pending or  proposed  deficiency  by either the IRS or any
state, local, foreign, or other taxing authority, or (iii) granted any extension
of the limitations period applicable to any claim for taxes.

         For the  purposes of this  Section  3.12,  "tax" shall mean and include
taxes,  additions to tax,  penalties,  interest,  fines,  duties,  withholdings,
assessments,  and  charges  assessed or imposed by any  governmental  authority,
including  but not limited to all federal,  state,  county,  local,  and foreign
income, profits, gross receipts, import, ad valorem, real and personal property,
franchise,  license,  sales,  use, value added,  stamp,  transfer,  withholding,
payroll, employment,  excise, custom, duty, and any other taxes, obligations and
assessments  of any kind  whatsoever;  "tax" shall also  include  any  liability
arising  as a result of being  (or  ceasing  to be) a member of any  affiliated,
consolidated,  combined, or unitary group as well as any liability under any tax
allocation, tax sharing, tax indemnity, or similar agreement.

         3.14 Contracts. Except as set forth on the Disclosure Schedule, neither
the  Company  nor any  Subsidiary  (i) is a party to any  collective  bargaining
agreement or contract  with any labor  union,  (ii) is a party to any written or
oral contract for the  employment of any officer,  individual  employee or other
person on a full-time or consulting  basis, or relating to severance pay for any
such  person,  (iii)  is a  party  to any  (A)  written  or  oral  agreement  or
understanding to repurchase assets previously sold (or to indemnify or otherwise
compensate  the  purchaser in respect of such assets) or (B)  agreement  for the
sale  of any  capital  asset,  (iv)  is a party  to any  contract,  arrangement,
commitment or understanding  (whether written or oral) which provides for future
payments  by the  Company  in excess of  $50,000  and is not  terminable  by the
Company  nor any  Subsidiary  within 60 days  without  payment  of a penalty  or
premium,  other than employment  contracts,  benefit plans and leases  otherwise
disclosed in the Disclosure  Schedule or listed as an exhibit in the Company SEC
Filings,  (v) is a party to any independent sales  representative,  OEM, supply,
distribution,  manufacturers'  representative,  dealer,  licensing  (except  for
immaterial   licenses,   which   include   without   limitation,   licenses  for
off-the-shelf   software)  joint  development,   joint  venture,   research  and
development, or similar contract, (vi) is a party to any contract,  arrangement,
commitment  or  understanding  which is a material  contract (as defined in Item
601(b)(10) of Regulation S-K of the SEC) to be performed  after the date of this
Agreement  that has not been filed or  incorporated  by reference in the Company
SEC Filings, (vii) is a party to any confidentiality  agreement or any agreement
which  prohibits  the  Company or the  Subsidiary  from  freely  engaging in any
business anywhere in the world,  (viii) is a party to any agreement or indenture
relating to the  borrowing of money,  (ix) has  guaranteed  any  obligation  for
borrowed  money,  or (x) is a party to any agreement or contract that  obligates
the Company to pay  consequential  damages.  The Company and each Subsidiary has
performed  all  obligations  required to be  performed by it under any listed or
material  contract,  plan,  agreement,  understanding,  or  arrangement  made or
obligation owed by or to the Company or any Subsidiary, except where the failure
would not have a Company Material  Adverse Effect;  there has not been any event
of default  (or any event or  condition  which with notice or the lapse of time,
both or otherwise,  would constitute an event of default) thereunder on the part
of the Company, any Subsidiary,  or, to the Company's knowledge, any other party
to any thereof that would have a Company Material  Adverse Effect;  the same are
in full  force and  effect  and  valid and  enforceable  by the  Company  or its

<PAGE>

Subsidiaries  in  accordance  with  their  respective  terms  subject to laws of
general  application   relating  to  bankruptcy,   insolvency,   reorganization,
moratorium or other similar laws affecting creditors' rights generally and rules
or law governing  specific  performance,  injunctive relief, and other equitable
remedies;  and  the  performance  of  any  such  contracts,  plans,  agreements,
understandings,  arrangements,  or obligations would not have a Company Material
Adverse Effect.

         3.15 Title to Properties;  Liens.  The Company and/or its  Subsidiaries
have good and marketable  title to all  properties  and assets  reflected on the
Company  Audited  Balance Sheet or the Company Interim Balance Sheet or acquired
after the dates  thereof  (except for  properties  and assets sold or  otherwise
disposed of in the ordinary course of business since the dates  thereof),  which
includes each asset the absence or  unavailability of which would have a Company
Material Adverse Effect, subject only to (a) statutory Liens arising or incurred
in the  ordinary  course  of  business  with  respect  to which  the  underlying
obligations  are not  delinquent,  (b) with  respect to personal  property,  the
rights of customers of the Company or any  Subsidiary  with respect to inventory
or work in progress under orders or contracts entered into by the Company or any
Subsidiary  in the  ordinary  course of  business,  (c) Liens  reflected  on the
Company Audited  Balance Sheet or the Company  Interim Balance Sheet,  (d) Liens
for taxes not yet delinquent, and (e) and defects in title that would not have a
Company Material Adverse Effect. The term "Lien" as used in this Agreement means
any mortgage, pledge, security interest,  encumbrance, lien, claim, or charge of
any kind. All properties and assets purported to be leased by the Company or any
Subsidiary are subject to valid and effective  leases that are in full force and
effect, and there does not exist, and the Merger will not result in, any default
or  event  that  with  notice  or lapse of  time,  or both or  otherwise,  would
constitute a default  under any such leases which would have a Company  Material
Adverse Effect. The properties and assets of the Company and each Subsidiary are
in good working condition.

         3.16 Permits,  Licenses,  Etc. Except as specifically  disclosed on the
Disclosure  Schedule,  the Company and each Subsidiary has all rights,  permits,
certificates,  licenses, consents,  franchises,  approvals,  registrations,  and
other  authorizations  necessary to sell its products and services and otherwise
carry on and  conduct  its  business  and to own,  lease,  use,  and operate its
properties  and  assets  at the  places  and in the  manner  now  conducted  and
operated,  except  those the absence of which would not have a Company  Material
Adverse  Effect.  Neither the Company nor any Subsidiary has received any notice
or claim pertaining to the failure to obtain any permit,  certificate,  license,
franchise,  approval,  registration,  or  other  authorization  required  by any
federal, state, local, or foreign body or authority (including,  but not limited
to, any  nongovernmental  self-regulatory  agency) except for any such notice or
claim regarding any such failure that would not have a Company  Material Adverse
Effect,  nor has the  Company  or any  Subsidiary  received  any notice or claim
pertaining to the failure to obtain any permit, certificate, license, franchise,
approval,  registration,  or other  authorization  from  the FDA or any  similar
foreign regulatory agency.

         3.17 Intellectual  Property Rights. The Disclosure  Schedule contains a
complete and  accurate  list of all patents,  trademarks,  trade names,  service
marks,  and all  applications  for or registrations of any of the foregoing that
the Company  uses in its  business  (other  than  generally  available  computer
software) as to which the Company or any  Subsidiary  is the owner or a licensee
(indicating whether such license is exclusive or nonexclusive). To the knowledge
of the Company and except as disclosed on the Disclosure  Schedule,  the Company
and each Subsidiary  exclusively owns, free and clear of any Lien (as defined in
Section 3.14), or is exclusively  (unless otherwise  indicated in the Disclosure
Schedule) licensed to use, all patents,  trademarks, trade names, service marks,
applications  for  or   registrations  of  any  of  the  foregoing,   processes,
inventions, designs, technology, formulas, computer software programs, know-how,
and  trade  secrets  used in or  necessary  for the  conduct  of its  respective

<PAGE>

business as currently  conducted or proposed to be conducted  and where the lack
of ownership or such license would have a Company  Material  Adverse Effect (the
"Company Intellectual Property"). Except to the extent specifically disclosed on
the Disclosure Schedule,  no claim has been asserted or, to the knowledge of the
Company,  threatened by any person, and, to the Company's knowledge,  its patent
counsel has not concluded  that any claim exists,  with respect to the Company's
ownership of the Company Intellectual Property or challenging or questioning the
validity or  effectiveness of any license or agreement to which the Company is a
party with respect thereto. To the knowledge of the Company,  neither the use of
the  Company  Intellectual  Property  by the  Company or any  Subsidiary  in the
present or planned  conduct of its  business  nor any  product or service of the
Company or any Subsidiary  infringes on the intellectual  property rights of any
person. No current or former shareholder, employee, or consultant of the Company
or  any  Subsidiary  has  any  material  rights  in or to  any  of  the  Company
Intellectual   Property.   All  Company  Intellectual  Property  listed  on  the
Disclosure  Schedule has the status  indicated  therein and all applications are
still pending in good standing and have not been abandoned. Except to the extent
disclosed on the Disclosure Schedule:  (i) to the Company's  knowledge,  patents
included  within the Company  Intellectual  Property are valid and have not been
challenged in any judicial or  administrative  proceeding;  (ii) the Company and
each Subsidiary have made all statutorily  required  filings,  if any, to record
their interests,  and taken reasonable  actions to protect their rights,  in the
Company Intellectual Property, where the failure to make any such filing, record
such interest or take such other actions could  reasonably be expected to have a
Company  Material  Adverse  Effect;  (iii) to the  knowledge of the Company,  no
person  or entity  nor such  person's  or  entity's  business  or  products  has
infringed or misappropriated any Company  Intellectual  Property or currently is
infringing or misappropriating  any Company Intellectual  Property;  and (iv) no
other  person or entity  has any right to  receive  or any  obligation  to pay a
royalty  with  respect to any  Company  Intellectual  Property or any product or
service of the Company or any Subsidiary.

         3.18     Benefit Plans.

                  (a)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure  Schedule,  neither the Company nor any Subsidiary sponsors,
         maintains, contributes to, or has sponsored, maintained, or contributed
         to or been required to contribute  to, any  "employee  pension  benefit
         plan" ("Pension  Plan"), as such term is defined in Section 3(2) of the
         Employee  Retirement Income Security Act of 1974, as amended ("ERISA"),
         including,  solely for the purpose of this subsection,  a plan excluded
         from  coverage by Section  4(b)(5) of ERISA.  No failure to comply with
         applicable  provisions of ERISA,  the Code and other  applicable law in
         connection with any Pension Plan presently maintained by the Company or
         any Subsidiary  could reasonably be expected to have a Company Material
         Adverse Effect.

                  (b)  Neither  the   Company  nor  any   Subsidiary   sponsors,
         maintains, contributes to, or has sponsored, maintained, or contributed
         to or been  required  to  contribute  to,  any  Pension  Plan that is a
         "Multiemployer Plan" within the meaning of Section 4001(a)(3) of ERISA.

                  (c)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure  Schedule,  neither the Company nor any Subsidiary sponsors,
         maintains,  contributes to, or has sponsored,  maintained,  contributed
         to, or been required to contribute  to, any "employee  welfare  benefit
         plan"  ("Welfare  Plan"),  as such term is defined  in Section  3(1) of
         ERISA,  whether  insured  or  otherwise.  No  failure  to  comply  with
         applicable  provisions  of ERISA,  the Code and other  applicable  law,
         including,  but not limited to, Section 4980B of the Code and Part 6 of

<PAGE>

         Subtitle B of Title I of ERISA,  in  connection  with any Welfare  Plan
         presently  maintained by the Company or any Subsidiary could reasonably
         be  expected to have a Company  Material  Adverse  Effect.  Neither the
         Company  nor any  Subsidiary  has  established  or  contributed  to any
         "voluntary  employees'  beneficiary  association" within the meaning of
         Section 501(c)(9) of the Code.

                  (d)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure  Schedule,  neither the Company nor any Subsidiary sponsors,
         maintains,  or  contributes  to,  or  has  sponsored,   maintained,  or
         contributed to, a "self-insured  medical reimbursement plan" within the
         meaning of Section 105(h) of the Code and the regulations thereunder.

                  (e)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure  Schedule,  neither the Company nor any Subsidiary currently
         maintains or contributes to any oral or written bonus,  profit-sharing,
         compensation  (incentive or otherwise),  commission,  stock option,  or
         other  stock-based  compensation,   retirement,  severance,  change  of
         control,  vacation,  sick or parental leave,  dependent care,  deferred
         compensation, cafeteria, disability,  hospitalization,  medical, death,
         retiree,  insurance, or other benefit or welfare or other similar plan,
         policy,  agreement,  trust,  fund,  or  arrangement  providing  for the
         remuneration  or benefit of all or any employees or shareholders or any
         other  person,  that is  neither  a  Pension  Plan nor a  Welfare  Plan
         (collectively, the "Compensation Plans").

                  (f) To the knowledge of the Company, neither any Pension Plans
         or Welfare  Plans nor any trust  created or insurance  contract  issued
         thereunder  nor any trustee,  fiduciary,  custodian,  or  administrator
         thereof, nor any officer,  director,  or employee of the Company or any
         Subsidiary,  custodian,  or any other "disqualified  person" within the
         meaning  of  Section  4975(e)(2)  of the Code,  or "party in  interest"
         within the meaning of Section 3(14) of ERISA,  with respect to any such
         plan has  engaged  in any act or  omission  that  could  reasonably  be
         expected to result in a Company  Material  Adverse Effect in connection
         with a liability for breach of fiduciary duties under ERISA or a tax or
         penalty imposed by Section 502 of ERISA.

                  (g)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure  Schedule,  (i) full and timely payment has been made of all
         amounts  that  the  Company  or  any  Subsidiary  is  required,   under
         applicable  law,  with respect to any Pension  Plan,  Welfare  Plan, or
         Compensation  Plan,  or any  agreement  relating to any  Pension  Plan,
         Welfare Plan, or  Compensation  Plan, to have paid as a contribution to
         each Pension  Plan,  Welfare Plan, or  Compensation  Plan,  (ii) to the
         extent  required  by  generally  accepted  accounting  principles,  the
         Company has made adequate provisions for reserves to meet contributions
         that have not been made because they are not yet due under the terms of
         any  Pension  Plan,  Welfare  Plan,  or  Compensation  Plan or  related
         agreements, (iii) there will be no change on or before the Closing Date
         in the  operation of any Pension Plan,  Welfare  Plan, or  Compensation
         Plan or  documents  under which any such plan is  maintained  that will
         result in an  increase  in the  benefit  liabilities  under  such plan,
         except as may be  required  by law or as  provided  by the terms of the
         Pension Plan, Welfare Plan,  Compensation Plan or document in effect on
         the date of this Agreement,  to the extent  disclosed in or attached to
         the   Disclosure   Schedule,   (iv)  the  IRS  has   issued   favorable
         determination  letters  with  respect  to all  Company  and  Subsidiary
         Pension Plans that are intended to be qualified under Section 401(a) of
         the Code, and (v) the Company has made available to Parent complete and
         accurate  copies of all  Pension  Plans,  Welfare  Plans,  Compensation
         Plans, and related  agreements,  annual reports (Form 5500),  favorable
         determination  letters,  current  summary  plan  descriptions,  and all
         employee handbooks or manuals.

                  (h)  Except  to  the  extent  specifically  disclosed  on  the
         Disclosure   Schedule,   the  execution  of,  and  performance  of  the
         transactions  contemplated in, this Agreement will not (either alone or
         upon the occurrence of any  additional or subsequent  events) result in
         forgiveness of indebtedness or an increase in benefits or result in the

<PAGE>

         acceleration of vesting,  funding, benefit accruals or benefit payments
         under any Pension Plan,  Welfare Plan or Compensation  Plan.  Except to
         the extent specifically disclosed on the Disclosure Schedule, no amount
         that could  reasonably  be expected to be received  (whether in cash or
         property or the  vesting of  property)  by any  employee,  officer,  or
         director of the Company or any of its affiliates who is a "disqualified
         individual"  (as such term is defined in proposed  Treasury  Regulation
         Section 1.280G-1) under any Pension Plan, Welfare Plan, or Compensation
         Plan  currently  in  effect  as a  result  of any  of the  transactions
         contemplated by this Agreement would be an "excess  parachute  payment"
         (as such term is defined in Section 280G(b)(1) of the Code).

         3.19  Minute   Books.   The  minute   books  of  the  Company  and  the
Subsidiaries,  as previously  made available to Parent and its  representatives,
contain records of all actions taken at all meetings of and corporate actions or
written consents by the shareholders, Boards of Directors, and committees of the
Boards of Directors of the Company and the Subsidiaries,  except for the absence
of such records as would not have a Company Material Adverse Effect.

         3.20 Insurance Policies.  The Disclosure Schedule sets forth a complete
and accurate list of all policies of insurance (with copies attached) maintained
by the Company or any Subsidiary with respect to any of its officers, directors,
employees,  shareholders,  agents, properties,  buildings, machinery, equipment,
furniture, fixtures or operations and a description of each claim made in excess
of  $5,000  by the  Company  or any  Subsidiary  during  the  three-year  period
preceding the date hereof under any such policy of insurance.  All such policies
of insurance are in full force and effect.

         3.21 Bank Accounts.  The Disclosure  Schedule sets forth a list of each
bank,  broker,  or other depository with which the Company or any Subsidiary has
an account or safe deposit box, the names and numbers of such  accounts or boxes
and the names of all persons authorized to draw thereon or execute transactions.

         3.22 Powers of Attorney.  The Disclosure  Schedule sets forth the names
of all  persons,  if any,  holding  powers of  attorney  from the Company or any
Subsidiary  and a description  of the scope of each such power of attorney.  The
Company has  delivered to Parent prior to the date hereof  complete and accurate
copies of all such powers of attorney.

         3.23  Product  Liability  Claims.  Except  to the  extent  specifically
disclosed on the Disclosure Schedule, during the three-year period preceding the
date hereof  neither the Company nor any  Subsidiary has received a claim for or
based upon breach of product  warranty  (other than warranty  service and repair
claims  in  the   ordinary   course  of  business  not  material  in  amount  or
significance),  strict  liability  in tort,  negligent  manufacture  of product,
negligent provision of services or any other allegation of liability,  including
or  resulting  in,  but not  limited  to,  product  recalls,  arising  from  the
materials,  design,  testing,   manufacture,   packaging,   labeling  (including
instructions for use), or sale of its products or from the provision of services
(hereafter collectively referred to as "Product Liability").

         3.24  Warranties.  The terms of all product and service  warranties and
product  return,  sales  credit,  discount,  warehouse  allowance,   advertising
allowance,  demo sales,  and credit  policies of the Company and each Subsidiary
are specifically set forth on the Disclosure Schedule.  The Company has attached
to the Disclosure  Schedule  complete and accurate copies of all such warranties
and policies.

         3.25  Inventories.  Except as specifically  set forth on the Disclosure
Schedule,  all inventories of the Company and its Subsidiaries  consist of items
of merchantable quality and quantity usable or salable in the ordinary course of
business,  are salable at  prevailing  market  prices that are not less than the

<PAGE>

book value amounts  thereof or the price  customarily  charged by the Company or
the applicable  Subsidiary therefor,  conform to the specifications  established
therefor,  and have been  manufactured in accordance with applicable  regulatory
requirements,  except to the extent that the failure of such  inventories  so to
consist,  be  saleable,  conform,  or be  manufactured  would not have a Company
Material  Adverse  Effect.  Except as  specifically  set forth on the Disclosure
Schedule,  the  quantities of all  inventories,  materials,  and supplies of the
Company and each Subsidiary (net of the  obsolescence  reserve therefor shown on
the Company  Interim  Balance  Sheet and  determined  in the ordinary  course of
business consistent with past practice) are not obsolete, damaged,  slow-moving,
defective, or excessive, and are reasonable and balanced in the circumstances of
the Company and its Subsidiaries,  except to the extent that the failure of such
inventories to be in such conditions  would not have a Company  Material Adverse
Effect.  The  Disclosure  Schedule  sets forth a true and  complete  list of the
addresses of all  warehouses  or other  facilities in which  inventories  of the
Company or any Subsidiary are located.

         3.26 Relations with Suppliers and Customers.  Since January 1, 1995, no
current  supplier of the Company or any Subsidiary has cancelled any contract or
order for provision of, and, to the knowledge of the Company,  there has been no
threat by any such supplier not to provide, raw materials,  products,  supplies,
or services to the businesses of the Company and its  Subsidiaries  either prior
to or following the Merger except for any cancellation or threat which would not
have a Company Material Adverse Effect.  Except as specifically set forth on the
Disclosure  Schedule,  neither  the  Company  nor  any  Subsidiary  has,  to the
knowledge  of the  Company,  received any  information  from any  customer  that
accounted  for more than 5% of the revenues of the Company and its  Subsidiaries
during the last full fiscal  year  reasonably  to the effect that such  customer
intends  to  materially  decrease  the  amount  of  business  it does  with  the
businesses of the Company and its Subsidiaries  either prior to or following the
Merger.  The  Disclosure  Schedule  lists each  supplier  to the  Company or any
Subsidiary  that is the sole  source  of a  particular  raw  material,  product,
supply, or service.

         3.27 No Finders.  No act of the Company or any  Subsidiary has given or
will give rise to any claim  against any of the  parties  hereto for a brokerage
commission,  finder's  fee,  or  other  like  payment  in  connection  with  the
transactions  contemplated  herein,  except payments in the amounts specified on
the Disclosure  Schedule to those parties identified thereon who have acted as a
finder  for the  Company  or have been  retained  by the  Company  as  financial
advisors  pursuant  to  the  agreements  or  other  documents  described  in the
Disclosure  Schedule,  copies of which have been provided to Parent prior to the
date of this Agreement.

         3.28 Proxy  Statement.  The Proxy  Statement/Prospectus  (as defined in
Section 5.4 hereof) and any amendments or supplements  thereto will comply as to
form in all material  respects  with the  provisions of the 1934 Act as amended,
and  the  rules  and  regulations  promulgated  thereunder,   and  none  of  the
information  relating to the Company or its affiliates  included or incorporated
therein or in any amendments or supplements  thereto,  or any schedules required
to be filed with the SEC in connection therewith, will, as of the date mailed to
the Company's  shareholders and at the time of the Company Shareholders Meeting,
contain any untrue  statement  of a material  fact or omit to state any material
fact required to be stated  therein or necessary in order to make the statements
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading; provided, however, that no representation or warranty is made by the
Company  with  respect to  information  relating to Parent or any  affiliate  of
Parent.

         3.29  Merger  Filings.  The  information  as to  the  Company  and  the
Subsidiaries  or  any  of  their  affiliates  or  shareholders  included  in the
Company's  filing,  or submitted to Parent for inclusion in its filing,  if any,
required  to be  submitted  under the HSR Act or under any  Foreign  Merger Laws

<PAGE>

shall be true,  correct,  and complete in all material respects and shall comply
in all material  respects with the applicable  requirements  of the HSR Act, the
rules and regulations  issued by the Federal Trade Commission  pursuant thereto,
and the Foreign Merger Laws.

         3.30 Fairness Opinion.  The Company has received a written opinion from
Piper Jaffray, Inc. to the effect that, as of the date hereof, the consideration
to be received by the holders of Company  Common  Stock in the Merger is fair to
such  holders  from a financial  point of view,  and the Company  will  promptly
deliver a copy of such opinion to Parent.

         3.31     State Takeover Laws; Rights Agreement.

                  (a) The Board of Directors  of the Company and, in  accordance
         with Section 302A.673 of the MBCA, the required committee of such Board
         of  Directors  have  approved  the  transactions  contemplated  by this
         Agreement,  the  Agreements to Facilitate  Merger  described in Section
         5.11 hereof,  and the Stock Option Agreement  described in Section 5.17
         hereof such that the  provisions  of Sections  302A.671 and 302A.673 of
         the  MBCA  will  not  apply  to this  Agreement  or the  Agreements  to
         Facilitate  Merger  or  the  Stock  Option  Agreement  or  any  of  the
         transactions contemplated hereby or thereby.

                  (b) The  Company  has  taken  all  action  and  completed  all
         amendments,  if any,  necessary or  appropriate  so that (i) the Rights
         Agreement  dated as of June 26, 1996,  as amended,  between the Company
         and Northwest Bank Minnesota, N.A. (the "Company Rights Agreement"), is
         inapplicable  to the  transactions  contemplated  by the  Agreements to
         Facilitate Merger, the Stock Option Agreement and this Agreement,  (ii)
         the execution of this Agreement,  the Stock Option  Agreement,  and the
         Agreements  to  Facilitate   Merger,   and  the   consummation  of  the
         transactions  contemplated  hereby  and  thereby,  do not and  will not
         result in the  ability of any person to exercise  any Rights  under the
         Company  Rights  Agreement  or enable or require the Rights to separate
         from the shares of Company  Common  Stock to which they are attached or
         to be  triggered  or become  exercisable,  or  otherwise  result in the
         occurrence of a  "Distribution  Date" or "Stock  Acquisition  Date" (as
         such terms are  defined in the  Company  Rights  Agreement),  and (iii)
         immediately  prior to the Effective  Time, the Rights under the Company
         Rights Agreement  shall,  without any payment by the Company or Parent,
         expire  with  neither the  Company  nor Parent  having any  obligations
         under,  and no holder of Rights having any rights under,  the Rights or
         the Company Rights Agreement.


                                    ARTICLE 4
                         REPRESENTATIONS AND WARRANTIES
                         OF PARENT AND MERGER SUBSIDIARY

         Parent and Merger Subsidiary hereby jointly and severally represent and
warrant to the Company as of the date hereof as follows:

         4.1 Organization. Each of Parent and Merger Subsidiary is a corporation
duly  organized,  validly  existing,  and in good standing under the laws of the
state of Minnesota and has all requisite  corporate  power and authority to own,
lease,  and operate  its  properties  and to carry on its  business as now being
conducted.  Each of Parent and Merger  Subsidiary is duly  qualified and in good
standing  to do  business  in each  jurisdiction  in which the  property  owned,
leased,  or operated by it or the nature of the  business  conducted by it makes

<PAGE>

such  qualification  necessary and where the failure to qualify could reasonably
be expected to have a Parent Material Adverse Effect (as defined below). "Parent
Material Adverse Effect" means any effect, change or event that, individually or
in the  aggregate  with all  similar  effects,  changes or  events,  is or would
reasonably  be  expected  to be  material  and  adverse:  (i) to  the  business,
properties,  liabilities, results of operation, or financial condition of Parent
and its  subsidiaries,  considered  as a whole,  or (ii) to Parent's  ability to
perform any of its obligations under this Agreement or to consummate the Merger.

         4.2  Authorization.  Each  of  Parent  and  Merger  Subsidiary  has the
requisite  corporate  power and authority to execute and deliver this  Agreement
and to consummate  the  transactions  contemplated  hereby,  and Parent has full
corporate power and authority to prepare,  file, and distribute the Registration
Statement (as defined in Section 5.4 hereof). The execution and delivery of this
Agreement  by  Parent  and  Merger   Subsidiary  and  the  consummation  of  the
transactions  contemplated  hereby  have been duly and  validly  authorized  and
approved  by the Boards of  Directors  of Parent and  Merger  Subsidiary  and by
Parent as the sole  shareholder  of Merger  Subsidiary,  and no other  corporate
proceedings  on the part of  Parent  and  Merger  Subsidiary  are  necessary  to
authorize this Agreement or to consummate the transactions  contemplated hereby.
This  Agreement  has been duly and validly  executed  and  delivered  by each of
Parent and Merger Subsidiary and constitutes the valid and binding obligation of
Parent and Merger  Subsidiary,  enforceable  against each of them in  accordance
with its terms,  subject to laws of general application  relating to bankruptcy,
insolvency,   reorganization,   moratorium  or  other  similar  laws   affecting
creditors'  rights  generally and rules of law governing  specific  performance,
injunctive relief, or other equitable remedies.

         4.3 Capitalization. As of July 2, 1998, the authorized capital stock of
Parent  consisted of (a) 800,000,000  shares of Common Stock with a par value of
$.10 per share,  of which there were  469,350,541  shares issued and outstanding
and no shares held in Parent's  treasury,  and (b) 2,500,000 shares of Preferred
Stock with a par value of $1.00 per share,  of which there were no shares issued
and outstanding.  The authorized capital stock of Merger Subsidiary  consists of
2,500  shares of Merger  Subsidiary  Common  Stock,  100 of which are issued and
outstanding  and owned by Parent.  All issued and  outstanding  shares of Parent
Common  Stock and Merger  Subsidiary  Common Stock are, and the shares of Parent
Common  Stock to be issued and  delivered  in the Merger  pursuant  to Article 1
hereof shall be, at the time of issuance and  delivery,  validly  issued,  fully
paid, nonassessable,  and free of preemptive rights. The shares of Parent Common
Stock to be issued  and  delivered  in the Merger  pursuant  to Article 1 hereof
shall be registered  under the 1933 Act and duly listed for trading on the NYSE,
subject to official notice of issuance.

         4.4 Consents and Approvals.  Except for (i) any applicable requirements
of the 1933 Act, the 1934 Act, state securities laws, the NYSE, the HSR Act, and
Foreign  Merger Laws,  (ii) the filing and  recordation  of  appropriate  merger
documents as required by the MBCA, and (iii)  compliance with Sections  302A.471
and  302A.473  of  the  MBCA  regarding  dissenters'  rights  of  the  Company's
shareholders,  the execution and delivery of this Agreement by Parent and Merger
Subsidiary and the  consummation of the  transactions  contemplated  hereby will
not: (a) violate any  provision of the  Articles of  Incorporation  or Bylaws of
Parent or Merger Subsidiary;  (b) violate any statute, rule, regulation,  order,
or decree of any public body or  authority  (including,  but not limited to, the
FDA or any nongovernmental self-regulatory agency) by which Parent or any of its
subsidiaries or any of their  respective  properties or assets may be bound; (c)

<PAGE>

require  any filing with or permit,  consent,  or approval of any public body or
authority  (including,  but  not  limited  to,  the  FDA or any  nongovernmental
self-regulatory  agency);  or (d)  result  in any  violation  or  breach  of, or
constitute  (with or  without  due  notice  or lapse of time or both) a  default
under,  result in the loss of any material  benefit  under,  or give rise to any
right of termination,  cancellation,  increased payments, or acceleration under,
or  result in the  creation  of any Lien on any of the  properties  or assets of
Parent or its subsidiaries under, any of the terms, conditions, or provisions of
any note, bond, mortgage,  indenture,  license, franchise, permit, agreement, or
other  instrument or obligation to which Parent or any of its  subsidiaries is a
party, or by which any of them or any of their  respective  properties or assets
may be  bound,  except  (x) in the  cases  of  clauses  (b) or (c),  where  such
violation,  failure to make any such  filing or failure to obtain  such  permit,
consent or approval,  would not prevent or delay  consummation of this Merger or
otherwise prevent Parent from performing its obligations under the Agreement and
would not have a Parent Material  Adverse Effect,  and (y) in the case of clause
(d), for any such  violations,  breaches,  defaults,  or other  occurrences that
would not prevent or delay  consummation of any of the transaction  contemplated
hereby in any material respect,  or otherwise prevent Parent from performing its
obligations under this Agreement in any material  respect,  and would not have a
Parent Material Adverse Effect.

         4.5 Reports; Financial Statements; Absence of Changes. Parent has filed
all forms, reports,  registration statements, and documents required to be filed
by it with the SEC since  January 1, 1995  (such  forms,  reports,  registration
statements and documents,  together with any amendments thereto, are referred to
as the "Parent  SEC  Filings").  As of their  respective  dates,  the Parent SEC
Filings (i) complied as to form in all  material  respects  with the  applicable
requirements  of the 1933 Act and the 1934 Act, as the case may be, and (ii) did
not contain any untrue  statement of a material fact or omit to state a material
fact  required to be stated  therein or  necessary to make the  statements  made
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading.  The audited  financial  statements and unaudited  interim financial
statements  included or  incorporated by reference in the Parent SEC Filings (i)
were  prepared in  accordance  with  generally  accepted  accounting  principles
applied on a  consistent  basis  during the periods  involved  (except as may be
indicated therein or in the notes thereto), (ii) complied as of their respective
dates in all material respects with applicable  accounting  requirements and the
published  rules and  regulations  of the SEC with  respect  thereto,  and (iii)
fairly  present the  consolidated  financial  position of Parent as of the dates
thereof and the income, cash flows, and changes in shareholders'  equity for the
periods involved.  Except to the extent disclosed in Parent's subsequent filings
with the SEC or  specifically  disclosed on Schedule 4.5,  since April 30, 1997,
there has not been any change or circumstance  that would have a Parent Material
Adverse  Effect or as of the date hereof any  liabilities  or obligations of any
nature (whether  absolute,  accrued,  contingent or otherwise) that would have a
Parent Material Adverse Effect. Except to the extent disclosed in the Parent SEC
Filings  or  on  Schedule   4.5,  (i)  to  Parent's   knowledge,   there  is  no
investigation,  review, claim, action, suit or proceeding by any federal, state,
local or foreign  body or authority  (including,  but not limited to, the FDA or
any  nongovernmental  self-regulatory  agency) or private  party with respect to
Parent  that could  reasonably  be expected  to have a Parent  Material  Adverse
Effect,  (ii) all activities of Parent and its  subsidiaries  have been, and are
currently  being,  conducted in compliance with all applicable  federal,  state,
local, and foreign laws, ordinances,  regulations,  interpretations,  judgments,
decrees,   injunctions,    permits,   licenses,    certificates,    governmental
requirements,  orders and other similar items of any court or other governmental
entity (including,  but not limited to, those of the FDA or any  nongovernmental
self-regulatory  agency),  the failure to comply with which could  reasonably be
expected to have a Parent Material Adverse Effect,  (iii) Parent and each of its
subsidiaries has timely filed or otherwise provided all registrations,  reports,
data,  and other  information  and  applications  with respect to its  Regulated
Products required to be filed with or otherwise provided to the FDA or any other
federal,  state,  local, or foreign  governmental  authorities with jurisdiction
over the manufacture,  use or sale of the Regulated Products, and all regulatory
licenses or  approvals in respect  thereof are in full force and effect,  except
for the failure to file timely such registrations,  reports, data,  information,
and  applications  or the failure to have such  licenses  and  approvals in full
force and effect would not have a Parent Material Adverse Effect.


<PAGE>

         4.6 Registration  Statement.  The Registration Statement (as defined in
Section 5.4 hereof) and any amendments or supplements thereto will comply in all
material  respects  as to form  with the 1933 Act,  and none of the  information
relating to Parent or its affiliates included or incorporated  therein or in any
amendments or supplements  thereto,  or any schedules  required to be filed with
the SEC in connection  therewith,  will, at the time the Registration  Statement
becomes effective or as of the date of the Company Shareholders Meeting, contain
any untrue  statement  of a  material  fact or omit to state any  material  fact
required  to be stated  therein  or  necessary  in order to make the  statements
therein,  in  light  of the  circumstances  under  which  they  were  made,  not
misleading;  provided,  however,  that no  representation or warranty is made by
Parent with respect to  information  relating to the Company or any affiliate of
the Company.

         4.7 Merger Filings.  The information as to Parent and Merger Subsidiary
or any of their  affiliates  or  shareholders  included in Parent's  filing,  or
submitted  to the Company for  inclusion in its filing,  if any,  required to be
submitted  under the HSR Act or under any  Foreign  Merger  Laws  shall be true,
correct,  and complete in all material respects and shall comply in all material
respects  with  the  applicable  requirements  of the HSR  Act,  the  rules  and
regulations issued by the Federal Trade Commission pursuant thereto, and Foreign
Merger Laws.

         4.8 No Finders. No act of Parent or Merger Subsidiary has given or will
give  rise to any  claim  against  any of the  parties  hereto  for a  brokerage
commission,  finder's  fee,  or  other  like  payment  in  connection  with  the
transactions contemplated herein.


                                    ARTICLE 5
                                    COVENANTS

         5.1 Conduct of Business of the Company.  Except as contemplated by this
Agreement or to the extent that Parent otherwise consents in writing, during the
period from the date of this  Agreement to the Effective  Time,  the Company and
each Subsidiary will conduct its respective operations according to its ordinary
and usual course of business and consistent with past practice,  and the Company
and each  Subsidiary  will use all reasonable  efforts to preserve intact in all
material respects its respective business organizations, to maintain its present

<PAGE>

and planned business,  to keep available the services of its respective officers
and  employees  and  to  maintain  satisfactory  relationships  with  licensors,
licensees,  suppliers,  contractors,   distributors,   physicians,  consultants,
customers, and others having business relationships with it; provided,  however,
that the  Company  will not be  required  to make any  payments or enter into or
amend any contractual  arrangements or  understandings  to satisfy the foregoing
obligations.  Without  limiting the generality of the  foregoing,  and except as
otherwise expressly provided in or contemplated by this Agreement,  prior to the
Effective Time,  neither the Company nor any Subsidiary will,  without the prior
written consent of Parent:

                  (a)      amend its Articles of Incorporation or Bylaws;

                  (b) authorize for issuance,  issue,  sell,  pledge, or deliver
         (whether  through  the  issuance or  granting  of  additional  options,
         warrants, commitments, subscriptions, rights to purchase, or otherwise)
         any stock of any class or any  securities  convertible  into  shares of
         stock of any class  (other than the issuance of the number of shares of
         Company Common Stock  indicated in Section 3.4 hereof upon the exercise
         in  accordance  with the current  terms of the stock  options and other
         rights listed in the Disclosure  Schedule  hereof as outstanding on the
         date of this Agreement,  and the actual number of shares issued for the
         final offering period under the Company's  Employee Stock Purchase Plan
         in accordance with the Section 3.3 hereof);

                  (c) split,  combine,  or reclassify  any shares of its capital
         stock,  declare,  set aside, or pay any dividend or other  distribution
         (whether in cash,  stock,  or property or any  combination  thereof) in
         respect of its capital stock; or redeem or otherwise acquire any shares
         of its  capital  stock or  other  securities;  or  amend  or alter  any
         material term of any of its outstanding securities;

                  (d)  other  than  in  the  ordinary  course  of  business  and
         consistent   with  past  practice,   create,   incur,   or  assume  any
         indebtedness  for borrowed money,  or assume,  guarantee,  endorse,  or
         otherwise become liable or responsible (whether directly, contingently,
         or otherwise)  for the  obligations  of any other  person,  or make any
         loans,  advances or capital  contributions  to, or investments  in, any
         other  person;  or  create,  incur or assume  any Lien on any  material
         asset;

                  (e)  knowingly  take any action  that would have the effect of
         jeopardizing the qualification of the Merger as a reorganization within
         the meaning of Section 368(a)(2)(E) of the Code;

                  (f) (i) increase in any manner the  compensation of any of its
         directors, officers, employees, shareholders, or consultants, except in
         the ordinary  course of business and  consistent  with past practice or
         consistent with existing contractual  commitments,  in each case to the
         extent  disclosed in the Disclosure  Schedule or accelerate the payment
         of any  such  compensation  (whether  or not any such  acceleration  is
         consistent  with past  practice)  other than as  required  by  existing
         contractual  commitments  to the  extent  disclosed  in the  Disclosure
         Schedule;  (ii) pay or  accelerate  or  otherwise  modify the  payment,
         vesting,  exercisability,  Company matching amount, or other feature or
         requirement of any pension, retirement allowance,  severance, change of

<PAGE>

         control,  stock option,  or other employee  benefit not required by any
         existing  plan,  agreement,  or arrangement or by applicable law to any
         such director, officer, employee,  shareholder, or consultant,  whether
         past or present, except as determined by the Company to be necessary to
         comply  with  applicable  law or maintain  tax-favored  status (and any
         nonmaterial  changes  incidental  thereto);  or (iii) except for normal
         increases in the  ordinary  course of business in  accordance  with its
         customary  past  practices  or  consistent  with  existing  contractual
         commitments,  in each case to the extent  disclosed  in the  Disclosure
         Schedule,  commit  itself  to  any  additional  or  increased  pension,
         profit-sharing,   bonus,   incentive,   deferred  compensation,   stock
         purchase,  stock option,  stock  appreciation  right,  group insurance,
         severance,  change  of  control,  retirement  or other  benefit,  plan,
         agreement,   or  arrangement,   or  to  any  employment  or  consulting
         agreement,  with or for the benefit of any person, or amend any of such
         plans or any of such agreements in existence on the date hereof;

                  (g) except in the ordinary  course of business and  consistent
         with past practice or pursuant to contractual  obligations  existing on
         the date hereof, (i) sell, transfer,  mortgage, or otherwise dispose of
         or encumber  any real or personal  property,  (ii) pay,  discharge,  or
         satisfy  any  material  claim,   liability,  or  obligation  (absolute,
         accrued,  contingent, or otherwise), or (iii) cancel any debts or waive
         any claims or rights,  which involve  payments or  commitments  to make
         payments that individually exceed $50,000 or, in the aggregate,  exceed
         $100,000;

                  (h)   acquire   or  agree  to   acquire   (i)  by  merging  or
         consolidating  with,  or by  purchasing  a  substantial  portion of the
         assets of, or by any other manner,  any portion of the assets of, or by
         any other manner, any business of any corporation,  partnership,  joint
         venture,  association,  or  other  business  organization  or  division
         thereof or (ii) any assets that are  material,  individually  or in the
         aggregate,  to the Company,  except as provided in subsection (i) below
         and except  purchases of  inventory in the ordinary  course of business
         consistent with past practice;

                  (i)  make or  agree to make  any new  capital  expenditure  or
         expenditures  that,  individually,  is in excess of $50,000  or, in the
         aggregate, are in excess of $100,000;

                  (j) enter into,  amend, or terminate any joint ventures or any
         other agreements,  commitments,  or contracts that,  individually or in
         the aggregate,  are material to the Company or any  Subsidiary  (except
         agreements,   commitments,  or  contracts  expressly  provided  for  or
         contemplated  by this Agreement or for the purchase,  sale, or lease of
         goods,  services,  or  properties  in the ordinary  course of business,
         consistent with past  practice),  or otherwise make any material change
         in the  conduct of the  business  or  operations  of the Company or any
         Subsidiary;

                  (k) enter  into or  terminate,  or amend,  extend,  renew,  or
         otherwise  modify  (including,  but not  limited  to, by  default or by
         failure   to   act)   any   distribution,    OEM,   independent   sales
         representative,  noncompetition,  licensing,  franchise,  research  and
         development,  supply, or similar contract,  agreement, or understanding
         (except agreements, commitments, or contracts expressly provided for or
         contemplated  by this Agreement or for the purchase,  sale, or lease of
         goods,  services,  or  properties  in the ordinary  course of business,
         consistent with past practice);

                  (l) change in any  material  respect  its credit  policy as to
         sales of  inventories  or  collection of  receivables  or its inventory
         consignment practices;

                  (m)  remove  or  permit  to  be  removed  from  any  building,
         facility, or real property any machinery,  equipment, fixture, vehicle,
         or other  personal  property or parts  thereof,  except in the ordinary
         course of business;


<PAGE>

                  (n) alter or revise  its  accounting  principles,  procedures,
         methods,  or  practices,  except as required  by a change in  generally
         accepted  accounting  principles  and  concurred  with by the Company's
         independent public accountants;

                  (o) institute,  settle, or compromise any claim, action, suit,
         or proceeding  pending or threatened by or against it involving amounts
         in excess of  $100,000,  at law or in  equity  or before  any  federal,
         state, local,  foreign, or other governmental  department,  commission,
         board, bureau, agency, or instrumentality  (including,  but not limited
         to, the FDA or any nongovernmental self-regulatory agency);

                  (p) distribute or otherwise circulate any notices, directives,
         or  other  communications  directed  to all  or  groups  of  customers,
         vendors,  employees,   distributors,  or  others  associated  with  its
         business  relating to the  transactions  contemplated  hereby or to the
         operation of business after completion of the Merger without consulting
         with Parent,  giving Parent reasonable  opportunity to comment thereon,
         and obtaining prior to distribution  Parent's approval  thereof,  which
         shall not unreasonably be withheld;

                  (q)  knowingly  take any action that would cause the condition
         set forth in Section 6.2(a) not to be met; or

                  (r) agree,  whether in writing or otherwise,  to do any of the
         foregoing.

provided, however, that in the event that the Company or any of its Subsidiaries
would be prohibited from taking any action by reason of this Section 5.1 without
the prior written  consent of Parent,  such action may  nevertheless be taken if
the Company or any of its Subsidiaries is expressly required to do so by law and
the  Company  prior to taking  such  action  informs  Parent in  writing of such
requirement.

         5.2 No Solicitation. From the date hereof until the termination of this
Agreement,  the  Company  will not and will cause its  Subsidiaries  and its and
their respective officers,  directors,  employees,  representatives,  agents, or
affiliates  (including,  but not limited to any investment banker,  attorney, or
accountant  retained  by the  Company or any  Subsidiary),  to not,  directly or
indirectly,   solicit,  encourage,  initiate,  or  participate  in  any  way  in
discussions or negotiations  with, or knowingly  provide any information to, any
corporation, partnership, person, or other entity or group (other than Parent or
any affiliate or agent of Parent)  concerning  any merger,  sale or licensing of
any  significant  portion  of the  assets,  sale  of  shares  of  capital  stock
(including   without   limitation   any  proposal  or  offer  to  the  Company's
shareholders),  or similar transactions  involving the Company or any Subsidiary
(an "Alternative  Proposal"),  or otherwise  facilitate any effort or attempt to
make or implement an Alternative Proposal. The Company will promptly communicate
to Parent the terms of any  proposal  or  inquiry  that it has  received  or may
receive in respect of any such transaction or of any such information  requested
from it or of any such  negotiations or discussions being sought to be initiated
with the Company and may inform any third party who  contacts  the Company on an
unsolicited  basis  concerning  an  Alternative  Proposal  that the  Company  is
obligated  hereunder to disclose such to Parent.  Notwithstanding the foregoing,
this  section  shall not prohibit the Board of Directors of the Company from (i)
furnishing information to or entering into discussions or negotiations with, any
person or entity that makes an unsolicited bona fide Alternative  Proposal,  if,
and  only to the  extent  that,  (a)  the  Board  of  Directors  of the  Company
determines  in good faith,  after  receipt of advice to such effect from outside
legal  counsel,  that such action is so required  for the board of  Directors to
comply with its fiduciary  duties to  shareholders  imposed by law, (b) prior to
furnishing  information to, or entering into discussions and negotiations  with,
such person or entity, the Company promptly provides written notice to Parent to
the effect that it is furnishing information to, or entering into discussions or

<PAGE>

negotiations  with,  such  person or entity,  and (c) the Company  keeps  Parent
informed of the status and all  material  terms and events  with  respect to any
such Alternative  Proposal;  and (ii) to the extent  applicable,  complying with
Rules 14d-9 and 14e-2 promulgated under the 1934 Act, as amended, with regard to
an Alternative Proposal. Nothing in this section shall (x) permit the Company to
terminate this Agreement (except as specifically  provided in Article 7 hereof),
(y)  permit  the  Company  to  enter  into  any  agreement  with  respect  to an
Alternative  Proposal for as long as this Agreement  remains in effect (it being
agreed that for as long as this Agreement  remains in effect,  the Company shall
not enter into any  agreement  with any person that  provides for, or in any way
facilitates, an Alternative Proposal), or (z) affect any other obligation of the
Company under this Agreement while this Agreement remains in effect.

         5.3 Access and Information.  The Company shall afford to Parent, and to
Parent's  accountants,   officers,  directors,  employees,  counsel,  and  other
representatives,  reasonable  access during normal business hours, from the date
hereof through the Effective Time, to all of its properties,  books,  contracts,
commitments,  and records,  and,  during such period,  the Company shall furnish
promptly  to  Parent  all   information   concerning   the   Company's  and  its
Subsidiaries'  businesses,   prospects,  properties,   liabilities,  results  of
operations,   financial  condition,  testing,  clinicals,  officers,  employees,
investigators,  distributors,  customers,  suppliers, and others having dealings
with the Company as Parent may reasonably request and reasonable  opportunity to
contact and obtain  information  from such officers,  employees,  investigators,
distributors,  customers, suppliers, and others having dealings with the Company
as Parent  may  reasonably  request,  subject,  however,  to  limitations  under
existing  confidentiality  agreements  with other  bidders with respect to prior
offers.  During the  period  from the date  hereof to the  Effective  Time,  the
parties  shall in good faith meet and  correspond  on a regular basis for mutual
consultation  concerning  the  conduct of the  Company's  and the  Subsidiaries'
businesses  and,  in  connection  therewith,  Parent  shall be  entitled to have
employees or other representatives present at the offices of the Company and its
Subsidiaries to observe, and be kept informed concerning,  the Company's and the
Subsidiaries' operations and business planning.  Parent shall hold in confidence
all  such  nonpublic   information  as  required  and  in  accordance  with  the
confidentiality  letter  agreement  dated June 2, 1998,  between  Parent and the
Company,  as amended by the amendment to confidentiality  letter agreement dated
the same date (the "Confidentiality Agreement").

         5.4  Approval of Shareholders; Proxy Statement; Registration Statement.

                  (a) The Company shall take all action  necessary in accordance
         with  Minnesota law and the  Company's  Articles of  Incorporation  and
         Bylaws to cause a special  meeting of the Company's  shareholders  (the
         "Company  Shareholders  Meeting") to be duly called and held as soon as
         reasonably  practicable  following the date upon which the Registration
         Statement  (as  defined  below)  becomes  effective  for the purpose of
         voting upon the Merger.  The shareholder  vote or consent  required for
         approval of the Plan of Merger and the Merger  shall be no greater than
         that set forth in the MBCA and the Company's  Articles of Incorporation
         as previously provided to Parent.  Accordingly,  the Company represents
         and warrants  that the  affirmative  vote of the holders of record of a
         majority of the outstanding  shares of Company Common Stock is all that
         is necessary to obtain  shareholder  approval of the Plan of Merger and
         the Merger.  The Company shall use all reasonable efforts to obtain the
         approval by the Company's  shareholders of this Agreement,  the Plan of
         Merger,  and the Merger.  In accordance  therewith,  the Company shall,
         with the cooperation of Parent, prepare and file, as soon as reasonably
         practicable,  a  proxy  statement/prospectus  included  as  part of the

<PAGE>

         Registration Statement (such proxy statement/prospectus,  together with
         notice of meeting,  form of proxy, and any letter or other materials to
         the  Company's  shareholders  included  therein are referred to in this
         Agreement as the "Proxy  Statement/Prospectus").  The Company shall use
         all    reasonable    efforts    to   cause   the    definitive    Proxy
         Statement/Prospectus  to be mailed to the  shareholders of the Company,
         as soon as reasonably practicable following its effectiveness, with the
         date of mailing as mutually  determined by the Company and Parent.  The
         Company  will,  through  its  Board  of  Directors,  recommend  to  its
         shareholders   approval   of  the  Merger  in  the   definitive   Proxy
         Statement/Prospectus.

                  (b) Parent shall, with the cooperation of the Company, prepare
         and file, as soon as reasonably  practicable,  a registration statement
         under the 1933 Act  registering the shares of Parent Common Stock to be
         issued in the Merger (the "Registration Statement"), which Registration
         Statement shall include the Proxy Statement/Prospectus. Parent will use
         all  reasonable  efforts to have the  Registration  Statement  declared
         effective  by the SEC as promptly  thereafter  as  practicable.  Parent
         shall also take any action required to be taken under state blue sky or
         securities  laws in connection with the issuance of Parent Common Stock
         pursuant  to the  Merger.  The  Company  shall  furnish  to Parent  all
         information concerning the Company and its Subsidiaries and the holders
         of its capital  stock,  and shall take such other action and  otherwise
         cooperate, as Parent may reasonably request in connection with any such
         action.

                  (c) Parent shall notify the Company promptly of the receipt of
         the comments of the SEC and of any request by the SEC for amendments or
         supplements to the Registration  Statement and shall supply the Company
         with  copies of all  correspondence  with the SEC with  respect  to the
         Registration Statement.

                  (d) If at any time prior to the Company Shareholders  Meeting,
         any event should occur relating to the Company, any Subsidiary,  or the
         Company's  officers or directors that is required to be described in an
         amendment or supplement to the definitive Proxy Statement/Prospectus or
         the Registration  Statement,  the Company shall promptly inform Parent.
         If at any time prior to the  Company  Shareholders  Meeting,  any event
         shall occur relating to Parent or Merger Subsidiary or their respective
         officers or directors  that is required to be described in an amendment
         or  supplement  to the  definitive  Proxy  Statement/Prospectus  or the
         Registration  Statement,  Parent  shall  promptly  inform the  Company.
         Whenever any event occurs that should be described in an amendment  of,
         or supplement  to, the  definitive  Proxy  Statement/Prospectus  or the
         Registration  Statement,  the  Company or  Parent,  as the case may be,
         shall,  upon  learning  of such  event,  promptly  notify the other and
         consult and cooperate with the other in connection with the preparation
         of a mutually  acceptable  amendment or  supplement.  The parties shall
         promptly file such  amendment or supplement  with the SEC and mail such
         amendment or supplement as soon as  practicable  after it is cleared by
         the SEC.

         5.5  Consents.  The  Company  will,  at its cost and  expense,  use all
reasonable  efforts to obtain all  approvals  and consents of all third  parties
necessary  on the part of the  Company or its  Subsidiaries  to  consummate  the
transactions contemplated hereby. Parent agrees to cooperate with the Company in
connection with obtaining such approvals and consents.  Parent will, at its cost
and expense,  use all reasonable efforts to obtain all approvals and consents of

<PAGE>

all third parties necessary on the part of Parent to consummate the transactions
contemplated  hereby.  The Company agrees to cooperate with Parent in connection
with obtaining such approvals and consents.

         5.6      Affiliates' Letters.

                  (a) The  Company has  delivered  to Parent a list of names and
         addresses of those persons, in the Company's  reasonable judgment after
         consultation  with outside legal  counsel,  who, as of the date hereof,
         are  affiliates  within  the  meaning  of  Rule  145 of the  rules  and
         regulations  promulgated under the Securities Act (each such person, an
         "Affiliate")  of the Company.  The Company  shall  provide  Parent such
         information  and  documents  as Parent  shall  reasonably  request  for
         purposes of reviewing such list and shall promptly  update such list to
         reflect any changes thereto.  The Company has caused to be delivered to
         Parent an affiliate's  letter in the form attached hereto as Exhibit B,
         executed by each of the  Affiliates  of the Company  identified  in the
         foregoing list who were available, and shall use all reasonable efforts
         to deliver or cause to be  delivered  to Parent as soon as  practicable
         prior to the Effective Time such an affiliate's  letter executed by any
         Affiliate  who was not  available to sign and deliver such letter on or
         prior to the date  hereof  and by any  additional  persons  who  become
         Affiliates  after the date  hereof.  Parent  shall be entitled to place
         legends as specified in such  affiliates'  letters on the  certificates
         evidencing  any of the  Parent  Common  Stock  to be  received  by such
         Affiliates  pursuant  to the  terms  of this  Agreement,  and to  issue
         appropriate  stop transfer  instructions  to the transfer agent for the
         Parent Common Stock, consistent with the terms of such letters.

                  (b) For so long as  resales of shares of Parent  Common  Stock
         issued  pursuant to the Merger are  subject to the resale  restrictions
         set forth in Rule 145 under the  Securities  Act,  Parent  will use all
         reasonable  efforts to comply with Rule 144(c)(1)  under the Securities
         Act.

         5.7 Expenses.  Whether or not the Merger is consummated,  all costs and
expenses   incurred  in  connection  with  this  Agreement,   the   transactions
contemplated  hereby,  the  Proxy  Statement/Prospectus,  and  the  Registration
Statement will be paid by the party  incurring  such costs and expenses,  except
that the Company and Parent will share  equally the cost of printing  and filing
with the SEC the Proxy  Statement/Prospectus and the Registration Statement, the
filing fees required  under the HSR Act or any Foreign Merger Laws, and the fees
charged by PricewaterhouseCoopers  LLP for the letters described in Section 5.15
(the "Shared Expenses").

         5.8  Further  Actions.  Subject  to the  terms  and  conditions  herein
provided and without  being  required to waive any  conditions  herein  (whether
absolute, discretionary, or otherwise), each of the parties hereto agrees to use
all commercially  reasonable  efforts to take, or cause to be taken, all action,
and to do, or cause to be done, all things  necessary,  proper,  or advisable to
consummate and make effective the  transactions  contemplated by this Agreement.
In case at any time after the Effective  Time any further action is necessary or
desirable to carry out the purposes of this  Agreement,  the proper officers and
directors of each party to this Agreement shall take all such necessary action.

         5.9  Regulatory  Approvals.  The  Company  and  Parent  will  take  all
reasonable  action as may be necessary under federal or state securities laws or
the HSR Act or Foreign Merger Laws applicable to or necessary for, and will file
as soon as  reasonably  practicable  and,  if  appropriate,  use all  reasonable

<PAGE>

efforts to have declared  effective or approved all documents and  notifications
with the SEC and other  governmental or regulatory  bodies  (including,  without
limitation,  the FDA and equivalent foreign regulatory bodies, and other foreign
regulatory  bodies that  administer  Foreign  Merger Laws, and any foreign labor
councils or bodies as may be required)  that they deem  necessary or appropriate
for, the  consummation of the Merger and the transactions  contemplated  hereby,
and each party shall give the other  information  reasonably  requested  by such
other party  pertaining to it and its subsidiaries and affiliates to enable such
other party to take such  actions.  Notwithstanding  the  foregoing  or anything
herein to the contrary,  neither Parent nor Merger  Subsidiary shall be required
to make arrangements for or to effect the cessation,  sale, or other disposition
of particular  assets or  categories  of assets or businesses of Parent,  Merger
Subsidiary, the Company, or any of their affiliates.

         5.10 Certain  Notifications.  From time to time prior to the  Effective
Time within 5 days of the end of each calendar  month,  the Company will provide
written  notice to the Parent of any matter  which,  if  existing,  occurring or
known at the date of this Agreement, would have been required to be set forth or
described  in the  Disclosure  Schedule  or which is  necessary  to correct  any
information  in the  Disclosure  Schedule  which  has been  rendered  inaccurate
thereby,  or (b) would  constitute  a breach of any  covenant  contained in this
Agreement.  For purposes of determining the accuracy of the  representations and
warranties of the Company  contained in Article 3 of this  Agreement in order to
determine the  fulfillment  of the conditions set forth in Section 6.2(a) and to
determine  whether a breach has  occurred  for  purposes  of  Section  6.2(b) or
pursuant to Section 7.1(g) hereof, the Disclosure  Schedule delivered by Company
in accordance  with Section 3.1 shall be deemed to include only the  information
contained  therein when  delivered in  accordance  with Section 3.1 and shall be
deemed to exclude any  information  contained  in any  subsequent  notifications
hereunder.

         5.11  Voting of Shares.  To induce  Parent to execute  this  Agreement,
certain  officers and directors of the Company have executed and delivered as of
the date hereof (and prior to the Company's  execution and delivery of the Stock
Option  Agreement  described in Section  5.17 below)  Agreements  to  Facilitate
Merger in the form  attached  hereto as Exhibit C,  pursuant  to which each such
person has agreed to vote his or her shares of Company  Common Stock in favor of
the Merger at the Company Shareholders  Meeting. At the request of Parent, after
the execution of this Agreement the Company will use all  reasonable  efforts to
have other  officers and  directors of the Company  also execute  Agreements  to
Facilitate Merger.

         5.12  Noncompetition  Agreements.  To  induce  Parent to  execute  this
Agreement, the Company has caused Anthony Badolato and Allan Seck to execute and
deliver  to Parent as of the date  hereof  (but  expressly  contingent  upon the
Closing of the Merger),  noncompetition  agreements substantially in the form of
Exhibit D hereto each with a term of 42 months from the Effective  Time, and the
Company  shall use all  reasonable  efforts  to cause  Gregory  Melsen,  William
Haworth and Bradley Goskowicz to execute and deliver to Parent within 30 days of
the date  hereof  (but  expressly  contingent  upon the  Closing of the  Merger)
noncompetition  agreements  substantially  in the form of Exhibit D hereto  each
with a term of 24 months from the Effective Time.

         5.13 NYSE Listing  Application.  Parent shall prepare and submit to the
NYSE a  listing  application  for the  Parent  Common  Stock to be issued in the
Merger pursuant to Article 1 of this Agreement. The Company shall cooperate with
Parent in such listing application.

         5.14  Indemnification.  Parent agrees that it will, after the Effective
Time,  provide to those  individuals who have served as directors or officers of
the Company or its Subsidiaries  indemnification  equivalent to that provided by
the Articles of Incorporation  and Bylaws of the Company with respect to matters
occurring  prior  to  the  Effective  Time,  including  without  limitation  the
authorization of this Agreement and the transactions  contemplated hereby, for a
period  of six  years  from the  Effective  Time  (or,  in the  case of  matters

<PAGE>

occurring prior to the Effective Time which, have not been resolved prior to the
sixth  anniversary,  until such  matters  are finally  resolved).  To the extent
permitted by law, Parent will advance  expenses in connection with the foregoing
indemnification. In the event the Surviving Corporation or any of its successors
or  assigns  (i)  consolidates  with or  merges  into any other  person  and the
Surviving  Corporation  shall not be the continuing or surviving  corporation or
entity of such  consolidation  or merger or (ii) transfers all or  substantially
all of its  properties  and assets to any person,  then,  and in each such case,
proper  provision  shall  be made so that  the  successors  and  assigns  of the
Surviving  Corporation  shall assume the  obligations  set forth in this Section
5.14.  For a period of six years after the Effective  Time,  Parent will provide
that portion of directors'  and  officers'  liability  insurance  that serves to
reimburse  officers  and  directors  of the  Company and its  Subsidiaries  with
respect to claims  against  such  officers and  directors  arising from facts or
events that occurred before the Effective Time of at least the same coverage and
amounts,  and  containing  terms and  conditions no less  advantageous,  as that
coverage currently provided by the Company and its Subsidiaries.

         5.15     [Intentionally omitted]

         5.16 Subsidiary  Shares. At or prior to the Closing,  the Company shall
cause all issued and  outstanding  Subsidiary  shares  owned by any person other
than the  Company  to be  transferred  for no or nominal  consideration  to such
person or persons designated by Parent.

         5.17  Stock  Option  Agreement.   To  induce  Parent  to  execute  this
Agreement,  the  Company has  executed  and  delivered  to Parent as of the date
hereof (and after the execution and delivery of certain Agreements to Facilitate
Merger  described in Section  5.11 above) a Stock  Option  Agreement in the form
attached  hereto as Exhibit E,  pursuant  to which the  Company  has  granted to
Parent an option to acquire  from the  Company  such number of shares of Company
Common Stock as equals 19.9% of the aggregate  number of  outstanding  shares of
Company  Common Stock,  at an exercise  price equal to $11.125 per share or such
lesser amount as is described in the second  paragraph of Section 1.3(a) hereof.
Such option shall become  exercisable  only in the events described in the Stock
Option Agreement.

         5.18 Benefit Plans and Employee  Matters.  From and after the Effective
Time, Parent shall to the extent practicable cause the Surviving  Corporation to
provide employee  benefits and programs to the Company's  employees that, in the
aggregate,  are  substantially  comparable  or  more  favorable  than  those  in
existence as of the date hereof and  disclosed in writing to Parent prior to the
date hereof.

         5.19 Tax. Parent agrees that it will not knowingly take any action that
would  have the  effect of  jeopardizing  the  qualification  of the Merger as a
reorganization within the meaning of Section 368(a)(2)(E) of the Code.


                                    ARTICLE 6
                               CLOSING CONDITIONS

         6.1  Conditions to Obligations of Parent,  Merger  Subsidiary,  and the
Company. The respective obligations of each party to consummate the Merger shall
be  subject  to the  fulfillment  at or prior to the  Closing  of the  following
conditions:

                  (a) No Injunction.  None of Parent, Merger Subsidiary,  or the
         Company shall be subject to any final order, decree, or injunction of a
         court of  competent  jurisdiction  within  the United  States  that (i)

<PAGE>

         prevents or materially  delays the consummation of the Merger,  or (ii)
         would  impose  any  material   limitation  on  the  ability  of  Parent
         effectively  to exercise full rights of ownership of the Company or the
         assets or business of the Company.

                  (b) Shareholder Approval.  The approval of the shareholders of
         the Company referred to in Section 5.4 hereof shall have been obtained,
         in accordance with the MBCA and the Company's Articles of Incorporation
         and Bylaws.

                  (c) Registration  Statement.  The  Registration  Statement (as
         amended or supplemented) shall have become effective under the 1933 Act
         and shall not be subject  to any "stop  order,"  and no  action,  suit,
         proceeding, or investigation by the SEC to suspend the effectiveness or
         qualification  thereof  shall have been  initiated and be continuing or
         have been threatened and be unresolved. Parent shall also have received
         all state securities law or blue sky authorizations  necessary to carry
         out the transactions contemplated hereby.

                  (d) NYSE  Listing.  The  shares of Parent  Common  Stock to be
         delivered  pursuant  to the Merger  shall have been duly  listed on the
         NYSE, subject to official notice of issuance.

                  (e) Waiting  Periods.  The waiting  periods  applicable to the
         consummation  of the Merger  under the HSR Act and any  Foreign  Merger
         Laws shall have expired or been terminated.

         6.2  Conditions to  Obligations  of Parent and Merger  Subsidiary.  The
respective  obligations of Parent and Merger Subsidiary to consummate the Merger
shall be subject to the  fulfillment at or prior to the Closing of the following
additional conditions:

                  (a)  Representations  and Warranties True. Each representation
         and warranty of the Company contained in this Agreement, without regard
         to any qualification or reference to immateriality or "Company Material
         Adverse  Effect,"  shall be true and  correct on the date hereof and on
         the Closing Date as though such  representations  and  warranties  were
         made on such date (except those  representations  and  warranties  that
         address  matters  only as of a  particular  date shall  remain true and
         correct  as  of  such  date),   except  for  any   inaccuracies   that,
         individually  or in the aggregate,  have not had, and would not have, a
         Company Material Adverse Effect.

                  (b) Performance. The Company shall have performed and complied
         in  all  material  respects  with  all  agreements,   obligations,  and
         conditions  required by this Agreement to be performed or complied with
         by it on or prior to the  Closing,  and Parent  shall  have  received a
         certificate to such effect signed by the Chief Executive Officer of the
         Company.

                  (c)  Consents.  The Company  shall have  obtained all permits,
         authorizations, consents, and approvals required on its part to perform
         its obligations under, and consummate the transactions contemplated by,
         this  Agreement,  in form  and  substance  reasonably  satisfactory  to
         Parent,  and Parent and Merger  Subsidiary shall have received evidence
         reasonably  satisfactory  to  them  of the  receipt  of  such  permits,
         authorizations, consents, and approvals.

                  (d)  Opinion of  Counsel  for the  Company.  Parent and Merger
         Subsidiary  shall  have  received  an opinion  of  Oppenheimer  Wolff &
         Donnelly LLP,  counsel to the Company,  dated the Closing Date, in form
         and  substance  reasonably  satisfactory  to Parent,  to the effect set
         forth in Exhibit F hereto.


<PAGE>

                  (e) Affiliates'  Letters.  Parent shall have received a letter
         from each of the Affiliates pursuant to Section 5.6 hereof.

                  (f)  Noncompetition  Agreements.  Parent  shall have  received
         executed agreements from such persons, and in such form satisfactory to
         Parent, as described in Section 5.12 hereof.

                  (g)  Resignations.  Such officers and directors of the Company
         or of any  Subsidiary  as shall have been  specified  Parent shall have
         tendered their  respective  resignations  effective as of the Effective
         Time.

                  (h)  [Intentionally omitted]

                  (i) Continued  Employment of CEO. The chief executive  officer
         of the Company  shall have agreed to continue his  employment  with the
         Company following the Merger on such terms as are mutually satisfactory
         to Parent and such officer.

                  (j) Subsidiary  Shares.  The transfer of Subsidiary  shares as
         provided in Section 5.16 shall have occurred.

         6.3  Conditions to  Obligations  of the Company.  The obligation of the
Company to consummate the Merger shall be subject to the fulfillment at or prior
to the Closing of the following additional conditions:

                  (a)  Representations  and Warranties True. Each representation
         and warranty of Parent  contained in this Agreement,  without regard to
         any  qualification  or reference to  immateriality  or "Parent Material
         Adverse  Effect,"  shall  be  true  and  correct  on the  date  of this
         Agreement  and on the Closing Date as though such  representations  and
         warranties  were made on such date (except  those  representations  and
         warranties  that address  matters  only as of a  particular  date shall
         remain true and correct as of such date),  except for any  inaccuracies
         that,  individually  or in the  aggregate,  have not had, and would not
         have, a Parent Material Adverse Effect.

                  (b)  Performance.  Parent  and  Merger  Subsidiary  shall have
         performed and complied in all material  respects  with all  agreements,
         obligations,  and conditions required by this Agreement to be performed
         or complied with by them on or prior to the Closing.

                  (c) Consents. Parent and Merger Subsidiary shall have obtained
         all permits, authorizations,  consents, and approvals required on their
         part  to  perform  their   obligations   under,   and   consummate  the
         transactions  contemplated  by, this  Agreement,  in form and substance
         satisfactory  to the  Company,  and the  Company  shall  have  received
         evidence   satisfactory   to  it  of  the  receipt  of  such   permits,
         authorizations, consents, and approvals.

                  (d)  Opinion of Counsel for  Parent.  The  Company  shall have
         received an opinion of  Fredrikson  & Byron,  P.A.,  counsel to Parent,
         dated the Closing Date, in form and substance  reasonably  satisfactory
         to the Company, to the effect set forth in Exhibit G hereto.

                  (e) Tax Opinion. The Company shall have received an opinion of
         Oppenheimer Wolff & Donnelly LLP, counsel to the Company, to the effect
         that, subject to customary conditions and  representations,  the Merger

<PAGE>

         will be treated for  federal  income tax  purposes as a  reorganization
         within the meaning of Section  368(a)(2)(E) of the Code. This condition
         shall be  deemed  waived  in the event  that  such tax  opinion  is not
         rendered because the Company or its shareholders have failed to provide
         such customary representations.


                                    ARTICLE 7
                           TERMINATION AND ABANDONMENT

         7.1 Termination.  This Agreement may be terminated at any time prior to
the Effective Time,  whether before or after approval by the shareholders of the
Company, only:

                  (a) by mutual written  consent duly authorized by the Board of
         Directors of Parent and the Board of Directors of the Company;

                  (b) by either  Parent or the  Company if the Merger  shall not
         have been  consummated  on or before the date that is six months  after
         the date hereof;  provided,  however,  that the terminating party shall
         not have breached in any material  respect its  obligations  under this
         Agreement in any manner that shall have been the proximate cause of, or
         resulted  in,  the  failure to  consummate  the Merger by such date and
         provided   further,   however,   that,  if  a  request  for  additional
         information is received from the U.S. Federal Trade Commission  ("FTC")
         or Department of Justice ("DOJ")  pursuant to the HSR Act or additional
         information  is  requested  by an  authority  (a  "Foreign  Authority")
         pursuant  to Foreign  Merger  Laws,  such date shall be extended to the
         90th  day  following   acknowledgment  by  the  FTC,  DOJ,  or  Foreign
         Authority,  as  applicable,  that Parent and the Company have  complied
         with such request, but in any event not later than nine months from the
         date hereof;

                  (c) by either  Parent or the  Company if a court of  competent
         jurisdiction  or  an   administrative,   governmental,   or  regulatory
         authority has issued a final nonappealable order, decree, or ruling, or
         taken any other action,  having the effect of permanently  restraining,
         enjoining, or otherwise prohibiting the Merger;

                  (d)  by  either  Parent  or the  Company  if,  at the  Company
         Shareholders  Meeting,  the requisite vote of the  shareholders  of the
         Company  is not  obtained,  except  that the  right to  terminate  this
         Agreement  under this Section 7.1(d) will not be available to any party
         whose failure to perform any material  obligation  under this Agreement
         has been the proximate  cause of, or resulted in, the failure to obtain
         the requisite vote of the shareholders of the Company;

                  (e) by Parent if  either  (i) the  Company  has  breached  its
         obligations under Section 5.2 in any material  respect,  (ii) the Board
         of Directors of the Company has  recommended,  approved,  accepted,  or
         entered  into an  agreement  regarding,  an  Alternative  Proposal,  as
         defined in Section 5.2, (iii) the Board of Directors of the Company has
         withdrawn or modified in a manner adverse to Parent its  recommendation
         of the Merger, or (iv) a tender offer or exchange offer for 15% or more
         of the outstanding shares of Company Common Stock is commenced, and the
         Board of Directors of the Company,  within 10 business  days after such
         tender  offer  or  exchange  offer  is so  commenced,  either  fails to
         recommend against  acceptance of such tender offer or exchange offer by
         its shareholders or takes no position with respect to the acceptance of
         such tender offer or exchange offer by its shareholders;


<PAGE>

                  (f) by the Company if (i) it is not in material  breach of its
         obligations  under  Section  5.2,  (ii) the Board of  Directors  of the
         Company has authorized acceptance of an Alternative Proposal, and (iii)
         the  Company  has paid to Parent the fee  required by Section 7.2 to be
         paid to Parent in the manner therein provided;

                  (g) by Parent if (i) Parent is not in  material  breach of its
         obligations  under  this  Agreement  and (ii) there has been a material
         breach by the  Company of any of its  representations,  warranties,  or
         obligations  under this  Agreement  of by an  Affiliate  of the Company
         under such person's  affiliate's  letter described in Section 5.6 or by
         an officer or director of the Company under such person's  Agreement to
         Facilitate Merger described in Section 5.11 such that the conditions in
         Section 6.2 will not be satisfied, and the breach is not curable or, if
         curable,  is not cured by the  Company  within 30  calendar  days after
         receipt by the Company of written notice from Parent of such breach;

                  (h) by the  Company  if (i)  the  Company  is not in  material
         breach of its obligations  under this Agreement and (ii) there has been
         a material breach by Parent of any of its representations,  warranties,
         or obligations under this Agreement such that the conditions in Section
         6.3 will  not be  satisfied,  and the  breach  is not  curable  or,  if
         curable,  is not cured by Parent  within 30 calendar days after receipt
         by Parent of written notice from the Company of such breach.

                  (i) by Parent if, within 10 business days following receipt of
         the Disclosure  Schedule as described in Section 3.1, Parent determines
         that the Disclosure  Schedule  contains  information  which in Parent's
         good faith, reasonable business judgment adversely affects the value of
         the Company's business or prospects.

         7.2      Effect of Termination.

                  (a) In recognition of the time, efforts, and expenses expended
         and incurred by Parent with respect to the Company and the  opportunity
         that the acquisition of the Company presents to Parent, if:

                           (i) this Agreement is terminated  pursuant to Section
                  7.1(e) or 7.1(f); or

                           (ii) any third party makes an Alternative Proposal to
                  which the  Company  has made a  response  or any  third  party
                  acquires 15% or more of the  outstanding  Company Common Stock
                  prior to the Company Shareholders  Meeting, and either (A) the
                  requisite vote of the  shareholders  of the Company to approve
                  the Merger is not obtained or (B) this Agreement is terminated
                  pursuant  to  Section  7.1(g)  where the  Company's  breach is
                  willful and  intentional or is terminated  pursuant to Section
                  7.1(d),

         then,  in any such  event,  the  Company  will pay to Parent,  upon the
         termination  date in the  event  of  termination  pursuant  to  Section
         7.1(f),  and  immediately  upon the date of entering  into an agreement
         providing  for an  Alternative  Proposal (if such  agreement is entered
         into within 12 months of the  termination  of this  Agreement),  in the
         case of a termination  pursuant to Section 7.1(e) or in the case of the
         events  specified in clause (ii) above (by wire transfer of immediately
         available funds to an account designated by Parent for such purpose), a
         fee  equal  to  $2.75  million.   The  Company  acknowledges  that  the
         agreements  contained in this  Section 7.2 are an integral  part of the

<PAGE>

         transactions  contemplated by this Agreement and are not a penalty, and
         that,  without  these  agreements,  Parent  would not  enter  into this
         Agreement. If the Company fails to pay promptly the fee due pursuant to
         this Section 7.2, the Company shall also pay to Parent  Parent's  costs
         and expenses (including legal fees and expenses) in connection with any
         action,  including  the filing of any  lawsuit or other  legal  action,
         taken to collect  payment,  together with interest on the amount of the
         unpaid  fee under  this  section,  accruing  from its due  date,  at an
         interest rate per annum equal to two percentage points in excess of the
         prime  commercial  lending rate quoted by Norwest Bank Minnesota,  N.A.
         Any change in the interest rate  hereunder  resulting  from a change in
         such prime rate shall be effective at the  beginning of the day of such
         change in such prime rate.

                  (b) Except as provided in the next sentence of this paragraph,
         in the  event of the  termination  of this  Agreement  pursuant  to any
         paragraph of Section 7.1, the  obligations of the parties to consummate
         the Merger will  expire,  and none of the parties will have any further
         obligations  under this Agreement except pursuant to Sections 5.3, 5.7,
         and 7.2(a) and which shall survive  termination of this  Agreement.  In
         the  event  of  the  termination  of  this  Agreement  pursuant  to any
         paragraph  of  Section  7.1 that is caused by a breach of a party,  the
         party  whose  breach  was the  basis  for the  termination  will not be
         relieved from any liability for its breach or its obligations  pursuant
         to Section 7.2(a), and the other party will have no further obligations
         under this  Agreement  except as provided  in Sections  5.3 and 5.7 and
         Article 8.


                                    ARTICLE 8
                                  MISCELLANEOUS

         8.1  Amendment  and  Modification.  Subject  to  applicable  law,  this
Agreement may be amended, modified, or supplemented only by written agreement of
Parent,  Merger  Subsidiary,  and the Company at any time prior to the Effective
Time with respect to any of the terms contained  herein.  This Agreement may not
be amended  except by an instrument  in writing  signed on behalf of each of the
parties hereto.

         8.2 Waiver of  Compliance;  Consents.  Any  failure of Parent or Merger
Subsidiary on the one hand, or the Company on the other hand, to comply with any
obligation,  covenant,  agreement,  or  condition  herein  may be  waived by the
Company  or  Parent,  respectively,  only by a written  instrument  signed by an
officer of the party granting such waiver,  but such waiver or failure to insist
upon strict compliance with such obligation,  covenant,  agreement, or condition
shall not operate as a waiver of, or estoppel with respect to, any subsequent or
other  failure.  Whenever this  Agreement  requires or permits  consent by or on
behalf of any party  hereto,  such  consent  shall be given in  writing.  Merger
Subsidiary  agrees  that any  consent  or waiver of  compliance  given by Parent
hereunder shall be conclusively  binding upon Merger Subsidiary,  whether or not
given expressly on its behalf.

         8.3  Investigation;  Survival of  Representations  and Warranties.  The
respective  representations  and warranties of Parent and the Company  contained
herein or in any  certificates or other  documents  delivered prior to or at the
Closing  shall not be deemed waived or otherwise  affected by any  investigation
made by any party hereto.  Each and every  representation and warranty contained
herein shall be deemed to be  conditions to the Merger and shall not survive the
Merger.  This Section 8.3 shall have no effect upon any other  obligation of the
parties  hereto,  whether to be performed  before or after the  Closing.  Parent
acknowledges and agrees that (i) other than the  representations  and warranties
of the Company and its  Subsidiaries  specifically  contained in this Agreement,
including for this purpose the Disclosure Schedule and other matters referred to
in this Agreement or the Disclosure  Schedule,  there are no  representations or
warranties of the Company or its  Subsidiaries  either expressed or implied with

<PAGE>

respect to the Company, its Subsidiaries or their respective assets, liabilities
and businesses, and (ii) other than as incorporated,  referred to or repeated in
the  representations  and warranties of the Company made in this Agreement or in
the Disclosure Schedule, it shall have no claim or right to indemnification with
respect to any  information  (whether  written or oral),  documents  or material
furnished by the Company,  its Subsidiaries or any of their respective officers,
directors,  employees,  agents or advisors to Parent, including any information,
documents  or  material  made  available  to Parent  in  certain  "data  rooms,"
management  presentations  or any other form in expectation of the  transactions
contemplated by this Agreement

         8.4 Notices. All notices and other communications hereunder shall be in
writing  and shall be deemed  given  when  delivered  personally  by  commercial
courier service or otherwise, or by telecopier,  or three days after such notice
is mailed by  registered  or certified  mail (return  receipt  requested) to the
parties at the  following  addresses  (or at such other  address  for a party as
shall be specified by like notice):

         (a) if to Parent or Merger Subsidiary, to it at:

             Medtronic, Inc.
             7000 Central Avenue, N.E.
             Minneapolis, MN 55432


             with separate copies thereof addressed to

             Attention:       General Counsel
                              FAX:  (612) 572-5459
             and

             Attention:       Vice President and Chief Development Officer
                              FAX:  (612) 572-5404

         (b) If to the Company, to it at:

             AVECOR Cardiovascular, Inc.
             7611 Northland Drive
             Minneapolis, MN 55428
             FAX: (612) 391-9020
             Attention:  Anthony Badolato, CEO

             with a copy to:

             Oppenheimer Wolff & Donnelly LLP
             Plaza VII Building, Suite 3400
             45 South Seventh Street
             Minneapolis, MN 55402
             FAX: (612) 607-7100
             Attention:  Richard Lareau


<PAGE>

         8.5 Assignment.  This Agreement and all of the provisions  hereof shall
be  binding  upon and  inure to the  benefit  of the  parties  hereto  and their
respective  successors and permitted assigns, but neither this Agreement nor any
of the rights,  interests,  or obligations hereunder shall be assigned by any of
the parties hereto without the prior written  consent of the other parties,  nor
is this  Agreement  intended to confer upon any other person  except the parties
hereto  any rights or  remedies  hereunder,  except  that  Section  5.14 of this
Agreement shall inure to the benefit of the persons identified therein.

         8.6 Governing Law. This Agreement  shall be governed by,  construed and
enforced in accordance  with the laws of the State of Minnesota  (regardless  of
the laws that might otherwise  govern under applicable  Minnesota  principles of
conflicts of law).

         8.7  Counterparts.  This  Agreement  may be  executed  in  two or  more
counterparts,  each of  which  shall be  deemed  an  original,  and all of which
together shall constitute one and the same instrument.

         8.8  Knowledge.   As  used  in  this  Agreement  or  the   instruments,
certificates or other documents required  hereunder,  the term "knowledge" of an
entity  shall mean  knowledge  actually  possessed by any director or officer of
such entity.

         8.9 Interpretation. The Table of Contents, article and section headings
contained in this  Agreement are inserted for reference  purposes only and shall
not affect the meaning or interpretation of this Agreement. This Agreement shall
be construed  without  regard to any  presumption  or other rule  requiring  the
resolution of any ambiguity  regarding the interpretation or construction hereof
against the party causing this Agreement to be drafted.

         8.10  Publicity.  Upon  execution of this  Agreement by Parent,  Merger
Subsidiary, and the Company, the parties shall jointly issue a press release, as
agreed  upon  by  them.  The  parties  intend  that  all  future  statements  or
communications  to the public or press  regarding  this  Agreement or the Merger
will be mutually  agreed  upon by them and neither  party  shall,  without  such
mutual  agreement  or the prior  consent of the other,  issue any  statement  or
communication to the public or to the press regarding this Agreement,  or any of
the terms, conditions,  or other matters with respect to this Agreement,  except
as required by law or the rules of the NYSE or Nasdaq and then only (a) upon the
advice of such party's legal counsel;  (b) to the extent  required by law or the
rules of the NYSE or Nasdaq;  and (c) following  prior notice to the other party
and an  opportunity  for the other party to discuss  with the  disclosing  party
(which notice shall include a copy of the proposed statement or communication to
be issued to the press or public).  The foregoing shall not restrict Parent's or
the Company's  communications  with their employees or customers in the ordinary
course of business.

         8.11 Entire  Agreement.  This  Agreement,  including  the  exhibits and
schedules hereto and the Confidentiality  Agreement referred to herein, embodies
the entire  agreement and  understanding of the parties hereto in respect of the
subject  matter  contained  herein.   This  Agreement  and  the  Confidentiality
Agreement  supersede all prior  agreements  and the  understandings  between the
parties  with  respect to such  subject  matter.  No  discussions  regarding  or
exchange of drafts or comments in connection with the transactions  contemplated
herein shall  constitute an agreement  among the parties  hereto.  Any agreement
among the  parties  shall exist only when the parties  have fully  executed  and
delivered this Agreement.




<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first above written.

                                   MEDTRONIC, INC.



                                   By   /s/ Michael D. Ellwein
                                        Its:  Vice President


                                   AC MERGER CORP.


                                   By   /s/ Michael D. Ellwein
                                        Its:  President

                                   AVECOR CARDIOVASCULAR, INC.


                                   By   /s/ Anthony Badolato
                                        Its:  CEO



<PAGE>
                                   APPENDIX C

                       MINNESOTA BUSINESS CORPORATION ACT


302A.471.  Rights of dissenting shareholders

         Subdivision 1. Actions  creating rights. A shareholder of a corporation
may dissent  from,  and obtain  payment for the fair value of the  shareholder's
shares in the event of, any of the following corporate actions:

         (a) An amendment of the articles that materially and adversely  affects
the rights or preferences  of the shares of the  dissenting  shareholder in that
it:

                  (1) alters or abolishes a preferential right of the shares;

                  (2)  creates,  alters,  or abolishes a right in respect of the
         redemption  of the shares,  including a provision  respecting a sinking
         fund for the redemption or repurchase of the shares;

                  (3) alters or  abolishes a  preemptive  right of the holder of
         the shares to acquire shares,  securities other than shares,  or rights
         to purchase shares or securities other than shares;

                  (4) excludes or limits the right of a shareholder to vote on a
         matter,  or to cumulate  votes,  except as the right may be excluded or
         limited  through the  authorization  or issuance  of  securities  of an
         existing  or new class or  series  with  similar  or  different  voting
         rights;  except that an amendment to the articles of an issuing  public
         corporation  that  provides  that section  302A.671 does not apply to a
         control  share  acquisition  does not give  rise to the right to obtain
         payment under this section;

         (b)  A  sale,  lease,   transfer,   or  other  disposition  of  all  or
substantially  all of the  property  and  assets  of the  corporation,  but  not
including  a  transaction  permitted  without  shareholder  approval  in section
302A.661,  subdivision 1, or a disposition  in dissolution  described in section
302A.725,  subdivision 2, or a disposition pursuant to an order of a court, or a
disposition for cash on terms requiring that all or substantially all of the net
proceeds of disposition be distributed to the  shareholders  in accordance  with
their respective interests within one year after the date of disposition;

         (c) A plan of merger, whether under this chapter or under chapter 322B,
to which the corporation is a party, except as provided in subdivision 3;

         (d) A plan of exchange,  whether  under this  chapter or under  chapter
322B, to which the corporation is a party as the  corporation  whose shares will
be acquired by the acquiring  corporation,  if the shares of the shareholder are
entitled to vote on the plan; or

         (e) Any other  corporate  action taken  pursuant to a shareholder  vote
with respect to which the articles,  the bylaws, or a resolution approved by the
board directs that dissenting shareholders may obtain payment for their shares.

         Subd.  2.  Beneficial  owners.  (a)  A  shareholder  shall  not  assert
dissenters'  rights as to less than all of the shares  registered in the name of
the shareholder,  unless the shareholder dissents with respect to all the shares

<PAGE>

that are beneficially  owned by another person but registered in the name of the
shareholder and discloses the name and address of each beneficial owner on whose
behalf the  shareholder  dissents.  In that event,  the rights of the  dissenter
shall be determined as if the shares as to which the  shareholder  has dissented
and the other shares were registered in the names of different shareholders.

         (b) The  beneficial  owner of  shares  who is not the  shareholder  may
assert  dissenters'  rights  with  respect  to  shares  held  on  behalf  of the
beneficial  owner,  and shall be treated as a dissenting  shareholder  under the
terms of this section and section  302A.473,  if the beneficial owner submits to
the  corporation  at the time of or before the assertion of the rights a written
consent of the shareholder.

         Subd. 3. Rights not to apply. (a) Unless the articles, the bylaws, or a
resolution approved by the board otherwise provide,  the right to obtain payment
under this section does not apply to a shareholder of the surviving  corporation
in a merger,  if the shares of the  shareholder  are not entitled to be voted on
the merger.

         (b) If a date is fixed  according to section  302A.445,  subdivision 1,
for the determination of shareholders  entitled to receive notice of and to vote
on an action described in subdivision 1, only shareholders as of the date fixed,
and  beneficial  owners as of the date fixed who hold through  shareholders,  as
provided in subdivision 2, may exercise dissenters' rights.

         Subd. 4. Other rights.  The  shareholders  of a corporation  who have a
right under this section to obtain  payment for their shares do not have a right
at law or in equity to have a corporate  action  described in  subdivision 1 set
aside or rescinded,  except when the corporate  action is fraudulent with regard
to the complaining shareholder or the corporation.


302A.473.  Procedures for asserting dissenters' rights

         Subdivision 1. Definitions. (a) For purposes of this section, the terms
defined in this subdivision have the meanings given them.

         (b)  "Corporation"  means the issuer of the shares  held by a dissenter
before the corporate  action referred to in section  302A.471,  subdivision 1 or
the successor by merger of that issuer.

         (c) "Fair  value of the  shares"  means  the  value of the  shares of a
corporation  immediately  before  the  effective  date of the  corporate  action
referred to in section 302A.471, subdivision 1.

         (d) "Interest" means interest  commencing five days after the effective
date of the corporate action referred to in section 302A.471,  subdivision 1, up
to and including the date of payment, calculated at the rate provided in section
549.09 for interest on verdicts and judgments.

         Subd. 2. Notice of action. If a corporation calls a shareholder meeting
at which any action described in section 302A.471,  subdivision 1 is to be voted
upon,  the notice of the meeting shall inform each  shareholder  of the right to
dissent  and shall  include a copy of section  302A.471  and this  section and a
brief description of the procedure to be followed under these sections.

         Subd. 3. Notice of dissent.  If the proposed action must be approved by
the shareholders,  a shareholder who wishes to exercise  dissenters' rights must
file  with the  corporation  before  the vote on the  proposed  action a written
notice of intent to demand the fair value of the shares owned by the shareholder
and must not vote the shares in favor of the proposed action.


<PAGE>

         Subd. 4. Notice of procedure; deposit of shares. (a) After the proposed
action has been approved by the board and, if necessary,  the shareholders,  the
corporation  shall send to all shareholders who have complied with subdivision 3
and to all shareholders entitled to dissent if no shareholder vote was required,
a notice that contains:

         (1) The  address  to which a demand for  payment  and  certificates  of
certificated  shares  must be sent in order to  obtain  payment  and the date by
which they must be received;

         (2) Any  restrictions  on transfer of  uncertificated  shares that will
apply after the demand for payment is received;

         (3) A form to be used to certify the date on which the shareholder,  or
the  beneficial  owner on whose behalf the  shareholder  dissents,  acquired the
shares or an interest in them and to demand payment; and

         (4) A copy of section 302A.471 and this section and a brief description
of the procedures to be followed under these sections.

         (b) In order to receive  the fair  value of the  shares,  a  dissenting
shareholder must demand payment and deposit  certificated  shares or comply with
any restrictions on transfer of  uncertificated  shares within 30 days after the
notice required by paragraph (a) was given, but the dissenter  retains all other
rights of a shareholder until the proposed action takes effect.

         Subd. 5.  Payment;  return of shares.  (a) After the  corporate  action
takes  effect,  or after the  corporation  receives a valid  demand for payment,
whichever is later, the corporation  shall remit to each dissenting  shareholder
who has complied with subdivisions 3 and 4 the amount the corporation  estimates
to be the fair value of the shares, plus interest, accompanied by:

         (1) The corporation's closing balance sheet and statement of income for
a fiscal year ending not more than 16 months  before the  effective  date of the
corporate   action,   together  with  the  latest  available  interim  financial
statements;

         (2) An estimate by the  corporation of the fair value of the shares and
a brief description of the method used to reach the estimate; and

         (3)  A  copy  of  section  302A.471  and  this  section,  and  a  brief
description of the procedure to be followed in demanding supplemental payment.

         (b) The corporation may withhold the remittance  described in paragraph
(a) from a person who was not a  shareholder  on the date the  action  dissented
from was  first  announced  to the  public or who is  dissenting  on behalf of a
person  who was not a  beneficial  owner  on that  date.  If the  dissenter  has
complied  with  subdivisions  3 and 4,  the  corporation  shall  forward  to the
dissenter  the materials  described in paragraph  (a), a statement of the reason
for withholding the remittance,  and an offer to pay to the dissenter the amount
listed in the  materials if the  dissenter  agrees to accept that amount in full
satisfaction.  The  dissenter  may  decline the offer and demand  payment  under
subdivision  6.  Failure  to do so  entitles  the  dissenter  only to the amount
offered. If the dissenter makes demand, subdivisions 7 and 8 apply.


<PAGE>

         (c) If the  corporation  fails to remit  payment  within 60 days of the
deposit  of  certificates   or  the  imposition  of  transfer   restrictions  on
uncertificated shares, it shall return all deposited certificates and cancel all
transfer  restrictions.  However,  the  corporation  may again give notice under
subdivision 4 and require deposit or restrict transfer at a later time.

         Subd. 6. Supplemental payment; demand. If a dissenter believes that the
amount  remitted  under  subdivision 5 is less than the fair value of the shares
plus interest,  the dissenter may give written notice to the  corporation of the
dissenter's own estimate of the fair value of the shares, plus interest,  within
30 days after the  corporation  mails the  remittance  under  subdivision 5, and
demand payment of the difference. Otherwise, a dissenter is entitled only to the
amount remitted by the corporation.

         Subd. 7. Petition;  determination. If the corporation receives a demand
under subdivision 6, it shall, within 60 days after receiving the demand, either
pay to the  dissenter the amount  demanded or agreed to by the  dissenter  after
discussion with the corporation or file in court a petition  requesting that the
court determine the fair value of the shares, plus interest.  The petition shall
be filed in the  county in which the  registered  office of the  corporation  is
located,  except that a surviving  foreign  corporation  that  receives a demand
relating  to the shares of a  constituent  domestic  corporation  shall file the
petition in the county in this state in which the last registered  office of the
constituent  corporation  was located.  The  petition  shall name as parties all
dissenters  who  have  demanded  payment  under  subdivision  6 and who have not
reached agreement with the corporation.  The corporation shall, after filing the
petition,  serve all parties with a summons and copy of the  petition  under the
rules of civil procedure. Nonresidents of this state may be served by registered
or  certified  mail or by  publication  as provided by law.  Except as otherwise
provided,   the  rules  of  civil  procedure  apply  to  this  proceeding.   The
jurisdiction  of the court is  plenary  and  exclusive.  The  court may  appoint
appraisers,  with  powers and  authorities  the court deems  proper,  to receive
evidence on and recommend the amount of the fair value of the shares.  The court
shall  determine  whether the shareholder or shareholders in question have fully
complied with the  requirements  of this section,  and shall  determine the fair
value of the  shares,  taking  into  account any and all factors the court finds
relevant,  computed by any method or combination  of methods that the court,  in
its discretion,  sees fit to use, whether or not used by the corporation or by a
dissenter. The fair value of the shares as determined by the court is binding on
all shareholders,  wherever located. A dissenter is entitled to judgment in cash
for the amount by which the fair value of the shares as determined by the court,
plus interest,  exceeds the amount,  if any,  remitted under  subdivision 5, but
shall not be liable to the  corporation  for the  amount,  if any,  by which the
amount,  if any,  remitted to the dissenter under subdivision 5 exceeds the fair
value of the shares as determined by the court, plus interest.

         Subd. 8. Costs; fees; expenses. (a) The court shall determine the costs
and expenses of a proceeding  under  subdivision  7,  including  the  reasonable
expenses and  compensation of any appraisers  appointed by the court,  and shall
assess those costs and expenses against the  corporation,  except that the court
may assess part or all of those  costs and  expenses  against a dissenter  whose
action  in  demanding  payment  under  subdivision  6 is found to be  arbitrary,
vexatious, or not in good faith.

         (b) If the  court  finds  that the  corporation  has  failed  to comply
substantially  with this section,  the court may assess all fees and expenses of
any experts or attorneys as the court deems  equitable.  These fees and expenses
may also be assessed against a person who has acted arbitrarily, vexatiously, or
not in good  faith in  bringing  the  proceeding,  and may be awarded to a party
injured by those actions.

         (c) The court may award,  in its  discretion,  fees and  expenses to an
attorney for the dissenters out of the amount awarded to the dissenters, if any.


<PAGE>

                                   APPENDIX D

July 12, 1998





The Board of Directors
AVECOR Cardiovascular Inc.
7611 Northland Drive
Minneapolis, MN  55428

Members of the Board:

In connection with the proposed  transaction  ("Transaction") in which Medtronic
Merger Corporation,  a wholly-owned subsidiary of Medtronic, Inc. ("Medtronic"),
will be merged with and into AVECOR  Cardiovascular  Inc.  ("AVECOR") and AVECOR
will become a  wholly-owned  subsidiary  of  Medtronic,  you have  requested our
opinion as to the fairness,  from a financial point of view, to the shareholders
of AVECOR of the proposed  consideration  to be received by the  shareholders of
AVECOR in the Transaction pursuant to the Agreement referred to below. Under the
terms of the  Agreement and Plan of Merger (the  "Agreement"),  at the effective
time of the  Transaction,  each issued and  outstanding  share of AVECOR  Common
Stock will be converted  into the fraction of a share of Medtronic  common stock
which is  equivalent  to $11.125  per share  based upon the average of the daily
closing stock price of Medtronic for the 18  consecutive  trading days ending on
and  including the second  trading day  immediately  preceding the closing.  The
terms and  conditions  of the Merger are more fully set forth in the  Agreement.
The Transaction is intended to qualify as a reorganization within the meaning of
Section 368(a) of the Internal Revenue Code of 1986, as amended (the "Code").

Piper Jaffray Inc., as a customary part of its investment  banking business,  is
engaged in the valuation of businesses and their  securities in connection  with
mergers  and   acquisitions,   underwriting   and  secondary   distributions  of
securities,  private  placements and valuations for estate,  corporate and other
purposes.  We have acted as exclusive  financial advisor to AVECOR in connection
with the Transaction and will receive a fee for our services which is contingent
upon  consummation of the Transaction.  In addition,  we will receive a separate
fee for providing this opinion,  which will be credited  against the fee for our
services.  This  opinion  fee is not  contingent  upon the  consummation  of the
Transaction.  AVECOR has also agreed to indemnify us against certain liabilities
in  connection  with our  services.  We acted as lead  manager of a public stock
offering of AVECOR Common Stock on June 21, 1995. In the ordinary  course of our
business,  we and our affiliates may actively trade  securities of Medtronic and
AVECOR for our own account or the account of our customers and, accordingly, may
at any time hold a long or short position in such securities.

In arriving  at our  opinion,  we have  undertaken  such  review,  analyses  and
inquiries as we deemed necessary and appropriate under the circumstances.  Among
other things,  we have reviewed (i) a draft dated July 10, 1998 of the Agreement
and Plan of Merger, (ii) certain public information related to Medtronic,  (iii)
certain  publicly  available  financial  and  securities  data of Medtronic  and
selected public companies deemed  comparable to Medtronic,  (iv) certain analyst
reports  on  Medtronic,  (v)  to  the  extent  publicly  available,  information
concerning selected transactions deemed comparable to the proposed Transaction ,
(vi)  certain  publicly  available  information  relative to AVECOR and selected
public companies deemed comparable to AVECOR,  (vii) certain internal  financial

<PAGE>

information  of AVECOR on a stand-alone  basis  prepared for financial  planning
purposes,  and  furnished  by AVECOR  management  and  (viii)  certain  publicly
available  financial and  securities  data of AVECOR.  We had  discussions  with
members of the management of AVECOR concerning the financial condition,  current
operating results and business outlook for AVECOR on a stand-alone basis.

We have relied upon and assumed the accuracy,  completeness  and fairness of the
financial  statements  and  other  information  provided  to  us by  AVECOR,  or
otherwise  made  available  to us, and have not assumed  responsibility  for the
independent verification of such information. AVECOR has advised us that it does
not publicly disclose internal financial  information of the type provided to us
and that such information was prepared for financial  planning  purposes and not
with the expectation of public disclosure.  We have relied upon the assurance of
the management of AVECOR that the information  provided to us by AVECOR has been
prepared on a reasonable basis, and, with respect to financial planning data and
other  business  outlook  information,  reflects  the best  currently  available
estimates,  and that they are not aware of any  information  or facts that would
make the information provided to us incomplete or misleading.

We have  assumed  that the final  form of the  Agreement  will be  substantially
similar to the last draft reviewed by us, without modification of material terms
or conditions by AVECOR or Medtronic.  We have also assumed that the Transaction
contemplated  by the Agreement  will  constitute a  "reorganization"  within the
meaning of Section 368(a) of the Code. In addition, we have assumed that, in the
course of obtaining the necessary regulatory  approvals for the Transaction,  no
restrictions,  including any divestiture requirements, will be imposed that will
have a material adverse effect on the contemplated benefits of the Transaction.

In arriving at our opinion,  we have not performed any  appraisals or valuations
of any specific assets or liabilities of AVECOR or Medtronic,  and have not been
furnished  with any  such  appraisals  or  valuations.  We  express  no  opinion
regarding the liquidation value of any entity.

This opinion is necessarily based upon the information available to us and facts
and  circumstances  as they  exist and are  subject  to  evaluation  on the date
hereof;  events  occurring  after the date hereof  could  materially  affect the
assumptions  used in preparing  this opinion.  We are not expressing any opinion
herein as to the price at which shares of AVECOR or Medtronic  Common Stock have
traded or may trade at any future time.  We have not  undertaken  to reaffirm or
revise this opinion or otherwise  comment  upon any events  occurring  after the
date hereof and do not have any  obligation  to update,  revise or reaffirm this
opinion.

This  opinion  is  directed  to and is for the use and  benefit  of the Board of
Directors of AVECOR and is rendered to the Board of Directors in connection with
its  consideration  of the  Transaction.  This opinion is not intended to be and
does  not  constitute  a  recommendation  to  any  shareholder  as to  how  such
shareholder  should vote with respect to the Transaction.  We were not requested
to opine as to, and this opinion does not address,  the basic business  decision
to proceed with or effect the  Transaction.  This opinion shall not be published
or otherwise  used, nor shall any public  references to us be made,  without our
prior written approval.

Based upon and subject to the  foregoing and based upon such other factors as we
consider  relevant,  it is our  opinion  that the  consideration  proposed to be
received  by the  shareholders  of AVECOR  in the  Transaction  pursuant  to the
Agreement is fair, from a financial point of view, to the shareholders of AVECOR
as of the date hereof.

Sincerely,


/s/ Piper Jaffray, Inc.
PIPER JAFFRAY INC.




<PAGE>


                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20. Indemnification of Directors and Officers.

         Minnesota  Statutes Section  302A.521,  Subd. 2, requires  Medtronic to
indemnify  a person made or  threatened  to be made a party to a  proceeding  by
reason of the former or present official  capacity of the person with respect to
Medtronic,  against judgments,  penalties,  fines,  settlements,  and reasonable
expenses, including attorneys' fees and disbursements, incurred by the person in
connection  with the  proceeding  if certain  statutory  standards  are met.  In
addition, Section 302A.521, Subd. 3, requires payment by Medtronic, upon written
request,  of  reasonable  expenses  in  advance  of  final  disposition  of  the
proceeding in certain circumstances.  A decision as to required  indemnification
is made by a  disinterested  majority  of the Board of  Directors  present  at a
meeting at which a disinterested quorum is present, or by a designated committee
of the Board,  by special legal  counsel,  by the  shareholders,  or by a court.
Section 302A.521 contains detailed terms regarding such right of indemnification
and reference is made thereto for a complete  statement of such  indemnification
rights.

         Medtronic's Bylaws provide for indemnification by Medtronic to the full
extent  permitted  by Minnesota  Statutes  Section  302A.521,  as now enacted or
hereafter amended, against and with respect to threatened, pending, or completed
actions, suits, or proceedings arising from, or alleged to arise from, a party's
actions or omissions as a director,  officer, employee, or agent of Medtronic or
any  subsidiary  of Medtronic or of any other  corporation,  partnership,  joint
venture,  trust,  or other  enterprise  that has served in such  capacity at the
request of Medtronic if such acts or omissions occurred,  or were or are alleged
to have  occurred,  while  such party was a  director  or officer of  Medtronic.
Generally,  under Minnesota law, indemnification will be available only where an
officer or director  can  establish  that he or she acted in good faith and in a
manner  such  person  reasonably  believed  to be in or not  opposed to the best
interests of Medtronic.  As permitted by Minnesota  Statutes  Section  302A.521,
Medtronic's  Restated  Articles of  Incorporation  provide that a director shall
have no personal liability to Medtronic or its shareholders for breach of his or
her fiduciary duty as a director, to the fullest extent permitted by law.

         In addition to providing  indemnification as outlined above,  Medtronic
also  purchases  individual  insurance  coverage for its directors and officers.
Subject to the stated conditions,  the policy insures the directors and officers
of Medtronic  against  liability  arising out of actions taken in their official
capacities.  To the extent that such actions cannot be indemnified by Medtronic,
the policy provides individual  liability insurance protection for the directors
and officers of Medtronic.

Item 21. Exhibits and Financial Statement Schedules

         (a)      Exhibits

         2        Agreement  and Plan of  Merger,  dated July 12,  1998,  by and
                  among  Medtronic,  Inc.,  AVECOR  Cardiovascular  Inc., and AC
                  Merger Corp.,  including the Exhibits thereto.  (The Agreement
                  and Plan of Merger  and  Exhibit A thereto  are  furnished  as
                  Appendices   B   and   A,    respectively,    to   the   Proxy
                  Statement/Prospectus  forming  a  part  of  this  Registration
                  Statement.)  Upon the  request  of the  Commission,  Medtronic
                  agrees to furnish  supplementally  to the Commission a copy of
                  any disclosure schedules to the Agreement and Plan of Merger.


<PAGE>

         5        Opinion  and Consent of  Fredrikson  & Byron,  P.A.  regarding
                  validity of shares.

         8        Form of Opinion  and Consent of  Oppenheimer  Wolff & Donnelly
                  LLP regarding certain tax matters.

         23.1     Consent of Fredrikson & Byron, P.A. (included in Exhibit 5).

         23.2*    Consent of Oppenheimer  Wolff & Donnelly LLP regarding certain
                  tax matters (included in Exhibit 8).

         23.3     Consent of PricewaterhouseCoopers LLP, independent accountants
                  for Medtronic, Inc.

         23.4     Consent of PricewaterhouseCoopers LLP, independent accountants
                  for AVECOR Cardiovascular Inc.

         23.5     Consent of Piper Jaffray Inc.

         24       Power of Attorney.

         99.1     Form  of  Proxy  to be  used  by  AVECOR  Cardiovascular  Inc.
                  shareholders.

         (b)      Financial Statement Schedules.

                  Not applicable.

         (c)      Reports,  Opinions and  Appraisals  Materially  Related to the
                  Transaction.

                  Opinion of Piper  Jaffray  Inc. is  furnished as Appendix D to
                  the  Proxy   Statement/Prospectus   forming  a  part  of  this
                  Registration Statement.

         --------
         *To be filed by amendment

Item 22. Undertakings.

         (a) The undersigned  registrant hereby undertakes that, for purposes of
determining  any liability  under the Securities Act of 1933, each filing of the
registrant's  annual  report  pursuant to Section  13(a) or Section 15(d) of the
Securities  Exchange  Act of 1934  (and,  where  applicable,  each  filing of an
employee  benefit  plan's  annual  report  pursuant  to  Section  15(d)  of  the
Securities  Exchange  Act of 1934)  that is  incorporated  by  reference  in the
registration  statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

         (b) (i) The undersigned  registrant hereby undertakes as follows:  that
prior to any public  reoffering of the securities  registered  hereunder through
use of a  prospectus  which  is a part of this  registration  statement,  by any
person or party who is deemed to be an  underwriter  within the  meaning of Rule
145(c),  the issuer undertakes that such reoffering  prospectus will contain the
information  called  for by the  applicable  registration  form with  respect to
reofferings  by  persons  who may be deemed  underwriters,  in  addition  to the
information called for by the other Items of the applicable form.


<PAGE>

                  (ii) The registrant  undertakes that every prospectus [a] that
is  filed  pursuant  to  paragraph  (b)(i)  immediately  preceding,  or [b] that
purports to meet the  requirements of Section 10(a)(3) of the Securities Act and
is used in connection  with an offering of securities  subject to Rule 415, will
be filed as a part of an amendment to the registration statement and will not be
used until such  amendment is effective,  and that,  for purposes of determining
any  liability  under  the  Securities  Act of 1933,  each  such  post-effective
amendment  shall be deemed to be a new  registration  statement  relating to the
securities  offered  therein,  and the offering of such  securities at that time
shall be deemed to be the initial bona fide offering thereof.

         (c)  Insofar  as  indemnification  for  liabilities  arising  under the
Securities Act of 1933 may be permitted to directors,  officers and  controlling
persons of the registrant  pursuant to the foregoing  provisions,  or otherwise,
the  registrant  has been  advised  that in the  opinion of the  Securities  and
Exchange  Commission such  indemnification is against public policy as expressed
in the  Securities  Act and is,  therefore,  unenforceable.  In the event that a
claim for  indemnification  against such liabilities  (other than the payment by
the  registrant  of  expenses  incurred  or  paid  by  a  director,  officer  or
controlling  person of the registrant in the  successful  defense of any action,
suit or proceeding) is asserted by such director,  officer or controlling person
in connection with the securities being registered,  the registrant will, unless
in the  opinion  of its  counsel  the matter  has been  settled  by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification  by it is  against  public  policy  as  expressed  in  the
Securities Act and will be governed by the final adjudication of such issue.

         (d) The undersigned registrant hereby undertakes to respond to requests
for information  that is incorporated by reference into the prospectus  pursuant
to Items 4, 10(b), 11, or 13 of this Form, within one business day of receipt of
such  request,  and to send the  incorporated  documents  by first class mail or
other equally  prompt means.  This includes  information  contained in documents
filed subsequent to the effective date of the registration statement through the
date of responding to the request.

         (e) The undersigned  registrant hereby undertakes to supply by means of
a  post-effective  amendment all information  concerning a transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the registration statement when it became effective.


<PAGE>


                                   SIGNATURES

         Pursuant  to the  requirements  of the  Securities  Act  of  1933,  the
Registrant  has duly  caused  this  Registration  Statement  to be signed on its
behalf  by  the  undersigned,   thereunto  duly  authorized,   in  the  City  of
Minneapolis, State of Minnesota, on August 26, 1998.

                                         MEDTRONIC, INC.


                                         By /s/ William W. George
                                          William W. George, Chairman
                                          and Chief Executive Officer



<PAGE>




         Pursuant  to the  requirements  of the  Securities  Act of  1933,  this
Registration  Statement  has been  signed on August  26,  1998 by the  following
persons in the capacities indicated.
<TABLE>
<S><C>    

Signature                               Title

/s/ William W. George                   Chairman, Chief Executive Officer and                August 26, 1998
William W. George                       Director (principal executive officer)

/s/ Robert L. Ryan                      Senior Vice President and Chief                      August 26, 1998
Robert L. Ryan                          Financial Officer (principal
                                        financial and accounting officer)

               *                        Vice Chairman and Director       )
Glen D. Nelson, M.D.                                                     )
                                                                         )
               *                        Director                         )
William R. Brody, M.D., Ph.D.                                            )
                                                                         )
               *                        Director                         )       * By  /s/ Ronald E. Lund
Paul W. Chellgren                                                        )            Ronald E. Lund
                                                                         )            Attorney-in-Fact
               *                        Director                         )
Arthur D. Collins, Jr.                                                   )            Date: August 26, 1998
                                                                         )
               *                        Director                         )
Antonio M. Gotto, Jr., M.D.                                              )
                                                                         )
               *                        Director                         )
Bernadine P. Healy, M.D.                                                 )
                                                                         )
               *                        Director                         )
Thomas E. Holloran                                                       )
                                                                         )
               *                        Director                         )
Richard L. Schall                                                        )
                                                                         )
               *                        Director                         )
Jack W. Schuler                                                          )
                                                                         )
               *                        Director                         )
Gerald W. Simonson                                                       )
                                                                         )
               *                        Director                         )
Gordon M. Sprenger                                                       )
                                                                         )
               *                        Director                         )
Richard A. Swalin, Ph.D.                                                 )

                                        Director
Jean-Pierre Rosso

</TABLE>

<PAGE>


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                              ---------------------

                                  EXHIBIT INDEX
                                       TO
                         FORM S-4 REGISTRATION STATEMENT
                              ---------------------



                                 MEDTRONIC, INC.


Exhibit    Description

2        Agreement  and Plan of  Merger,  dated  July  12,  1998,  by and  among
         Medtronic,  Inc.,  AVECOR  Cardiovascular  Inc.,  and AC Merger Corp. ,
         including  the Exhibits  thereto (The  Agreement and Plan of Merger and
         Exhibit A thereto are furnished as Appendices B and A, respectively, to
         the  Proxy  Statement/Prospectus  forming  a part of this  Registration
         Statement)

5        Opinion and Consent of Fredrikson & Byron, P.A.  regarding  validity of
         shares

8        Form of  Opinion  and  Consent  of  Oppenheimer  Wolff &  Donnelly  LLP
         regarding certain tax matters

23.1     Consent of Fredrikson & Byron, P.A. (included in Exhibit 5)

23.2*    Consent of  Oppenheimer  Wolff & Donnelly  LLP  regarding  certain  tax
         matters (included in Exhibit 8)

23.3     Consent of  PricewaterhouseCoopers  LLP,  independent  accountants  for
         .Medtronic, Inc.

23.4     Consent of  PricewaterhouseCoopers  LLP,  independent  accountants  for
         AVECOR Cardiovascular Inc.

23.5     Consent of Piper Jaffray Inc.

24       Power of Attorney of certain officers and directors

99.1     Form of Proxy to be used by AVECOR Cardiovascular Inc. shareholders

         --------
         *To be filed by amendment



                                                                      Exhibit B
                               AFFILIATE'S LETTER

Medtronic, Inc.
7000 Central Ave. NE
Minneapolis, MN  55432

Ladies and Gentlemen:

The  undersigned  officer and/or  director of AVECOR  Cardiovascular,  Inc. (the
"Company") has been advised that the  undersigned is deemed by the Company to be
an "affiliate" of the Company, as that term is used in paragraphs (c) and (d) of
Rule 145 under the  Securities  Act of 1933, as amended (the  "Securities  Act")
(such rule, as amended or replaced by any successor rule,  referred to herein as
"Rule 145").  Pursuant to the terms of the Agreement and Plan of Merger dated on
or about  the date  hereof  (the  "Merger  Agreement"),  among  Medtronic,  Inc.
("Parent"),  AC Merger Corp.  ("Merger  Subsidiary"),  and the  Company,  Merger
Subsidiary will be merged with and into the Company (the "Merger").  As a result
of the Merger,  outstanding shares of common stock, $.01 par value per share, of
the Company ("Company Common Stock") will be converted into the right to receive
shares of common  stock,  $.10 par value per share,  of Parent  ("Parent  Common
Stock"), as determined pursuant to the Merger Agreement.

In order to induce  Parent and the  Company to enter into the Merger  Agreement,
the  undersigned  (referred to herein as "Affiliate")  represents,  warrants and
agrees as follows:

1.       [Intentionally omitted]



2.       Affiliate  has been  advised  that the  issuance  of the Parent  Common
         Stock, if any, to Affiliate  pursuant to the Merger is being registered
         with the SEC under  the  Securities  Act and the rules and  regulations
         promulgated  thereunder  on  a  Registration  Statement  on  Form  S-4.
         However,  Affiliate  has also been advised that,  because  Affiliate is
         deemed to be an  "affiliate"  of the  Company  (as that term is used in
         paragraphs  (c) and (d) of Rule  145),  any  sale,  transfer  or  other
         disposition by Affiliate of any Parent Common Stock issued  pursuant to
         the  Merger  will,  under  current  law,  require  either  (a)  further
         registration  under the Securities Act of the Parent Common Stock to be
         sold,  transferred,  or otherwise  disposed of, or (b) compliance  with
         Rule  145,  or (c) the  availability  of  another  exemption  from such
         registration.

3.       Affiliate  will not offer to sell,  sell,  or otherwise  dispose of any
         Parent Common Stock issued pursuant to the Merger except pursuant to an
         effective  registration  statement  or in  compliance  with Rule 145 or
         another exemption from the registration  requirements of the Securities
         Act (the  compliance  with Rule 145 or the  availability  of such other
         exemption to be established by Affiliate to the reasonable satisfaction
         of Parent's counsel).

4.       Affiliate  consents to the placement of a stop transfer  order with the
         Company's and Parent's stock  transfer agent and registrar,  and to the
         placement of the  following  legend on  certificates  representing  the
         Company  Common Stock and Parent Common Stock issued or to be issued to
         Affiliate:

                  "THE SHARES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD OR
                  OTHERWISE TRANSFERRED EXCEPT IN COMPLIANCE WITH AN AFFILIATE'S
                  LETTER FROM THE  UNDERSIGNED  TO [PARENT],  AND IN  COMPLIANCE
                  WITH RULE 145 OF THE SECURITIES ACT OF 1933."

5.       Affiliate has carefully read this letter and has discussed with counsel
         for Affiliate or counsel for the Company,  to the extent Affiliate felt
         necessary,  the  requirements  of  this  letter  and  other  applicable
         limitations on the ability of Affiliate to sell, transfer, or otherwise
         dispose of Company Common Stock and Parent Common Stock.

6.       The Company agrees to take all reasonable actions up to the date of the
         Merger,  including  but not limited to the placement of a stop transfer
         order with the Company's stock transfer agent and registrar,  to ensure
         compliance by Affiliate with the provisions of this letter.

                                   Very truly yours,

July 12, 1998
                                   (Signature)


                                   (Name) (Please Print)

                                   AVECOR CARDIOVASCULAR, INC.

                                   By:


<PAGE>


                                                                      Exhibit C
                         AGREEMENT TO FACILITATE MERGER


DATE:    July 12, 1998

PARTIES:

                  Medtronic, Inc.,                        (hereinafter "Parent")
                  a Minnesota corporation

                           and

                  ------------------------,
                  an individual officer and/or director
                  of AVECOR Cardiovascular, Inc.     (hereinafter "Shareholder")

RECITALS:

         A.  Shareholder  is the legal or  beneficial  owner of shares of Common
Stock of AVECOR  Cardiovascular,  Inc., a Minnesota corporation (the "Company"),
and the  holder of  options,  warrants,  or other  rights to  acquire  shares of
Company Common Stock.

         B. Parent,  the Company,  and a  wholly-owned  subsidiary of Parent are
entering into an Agreement and Plan of Merger (the "Merger Agreement")  pursuant
to which it is proposed  that Parent's  subsidiary  will merge with and into the
Company  (the  "Merger")  and as a result  of which  the  outstanding  shares of
Company Common Stock shall be converted into Parent Common Stock.

         C. Shareholder deems it to be in Shareholder's best interest and in the
best interests of the Company and all other shareholders of the Company that the
Merger Agreement be approved, ratified, and confirmed by the shareholders of the
Company,  and  it is a  condition  to  Parent's  obligations  under  the  Merger
Agreement that Shareholder enter into this Agreement.

         D. It is  understood  and  acknowledged  by  Shareholder  that Parent's
execution  of the  Merger  Agreement  is being done in  reliance  upon the prior
execution and delivery of this Agreement, that Shareholder is entering into this
Agreement  prior to the  Company's  execution  and  delivery of the Stock Option
Agreement  referred  to  in  the  Merger  Agreement,   that  Parent  will  incur
substantial   expenses   proceeding   toward   consummation  of  the  Merger  as
contemplated by the Merger Agreement,  and that such expenses will be undertaken
in  reliance  upon  and  as a  result  of the  agreements  and  undertakings  of
Shareholder set forth herein.

         NOW,  THEREFORE,  in  consideration  of the foregoing,  and in order to
induce Parent to execute the Merger  Agreement and to proceed as contemplated by
the Merger Agreement  toward the consummation of the Merger,  and for other good
and  valuable  consideration,  the  receipt  and  adequacy  of which  is  hereby
acknowledged, the parties hereto agree as follows:

AGREEMENTS:

         1. Vote in Favor of Merger.  Shareholder,  in his or her  capacity as a
shareholder  of the Company or as a  representative  with the  authority to vote
shares of  Company  Common  Stock,  agrees to vote (or  caused to be voted)  all
shares of Company Common Stock with respect to which Shareholder  presently owns
or controls voting power, and all shares of Company Common Stock with respect to
which  Shareholder  in the future  acquires  ownership or voting  power,  at any
meeting of the shareholders of the Company, and in any action by written consent
of the shareholders of the Company,  (i) in favor of the approval,  consent, and
ratification of the Merger Agreement and the Merger, and (ii) against any action
that would impede,  interfere,  or discourage  the Merger,  would  facilitate an
acquisition of the Company,  in any manner,  by a party (other than Parent),  or
would result in any breach of representation,  warranty,  covenant, or agreement
of the Company under the Merger Agreement.  To the extent  inconsistent with the
foregoing  provisions of this Section 1, Shareholder  hereby revokes any and all
previous  proxies  with  respect  to any  shares of  Company  Common  Stock that
Shareholder  owns or has the right to vote.  Nothing in this Agreement  shall be
deemed to restrict or limit Shareholder's right to act in his or her capacity as
an officer or  director  of the  Company  consistent  with his or her  fiduciary
obligations in such capacity.

         2.   Representations   and  Warranties  of   Shareholder.   Shareholder
represents  and warrants to Parent that  Shareholder  has the legal  capacity to
enter into and perform all of  Shareholder's  obligations  under this Agreement.
The execution,  delivery,  and performance of this Agreement by Shareholder will
not violate any other  agreement  to which  Shareholder  is a party,  including,
without  limitation,  any voting agreement,  shareholders  agreement,  or voting
trust.  This Agreement has been duly executed and delivered by  Shareholder  and
constitutes a legal, valid, and binding agreement of Shareholder, enforceable in
accordance with its terms,  except as the enforcement  thereof may be limited by
bankruptcy, insolvency, fraudulent conveyance,  reorganization,  moratorium, and
similar laws, now or hereafter in effect.


<PAGE>

         3.  Successors and Assigns.  This  Agreement  shall be binding upon any
permitted purchasers,  donees, pledgees, and other transferees of Company Common
stock legally or beneficially  owned by Shareholder.  Shareholder  agrees not to
make any sales,  gifts,  transfers,  pledges,  or other  dispositions of Company
Common Stock without first making any such  transferee or pledgee fully aware of
the  obligations  under  this  Agreement  and  obtaining  such  transferee's  or
pledgee's written agreement to comply with the terms hereof.

         4.  Injunctive  Relief.   Shareholder  agrees  that  in  the  event  of
Shareholder's  breach of any provision of this Agreement,  Parent may be without
an adequate  remedy at law.  Shareholder  therefore  agrees that in the event of
Shareholder's  breach of any  provision of this  Agreement,  Parent may elect to
institute and prosecute  proceedings in any court of competent  jurisdiction  to
enforce  specific  performance  or to  enjoin  the  continuing  breach  of  such
provision, as well as to obtain damages for breach of this Agreement. By seeking
or  obtaining  any such  relief,  Parent will not be  precluded  from seeking or
obtaining any other relief to which it may be entitled.

         5.  Counterparts.  This  Agreement  may be  executed  in any  number of
counterparts,  each of which shall be deemed to be an original  and all of which
together shall constitute one and the same document.

         6.  Further  Assurances.  Shareholder  shall  execute and deliver  such
additional  documents  and take  such  further  action  as may be  necessary  or
desirable to consummate the transactions contemplated by this Agreement.

         7. Third-Party Beneficiaries.  Nothing in this Agreement,  expressed or
implied, shall be construed to give any person other than the parties hereto any
legal or equitable right,  remedy, or claim under or by reason of this Agreement
or any provision contained herein.

         8. Governing Law. This Agreement  shall be governed by and construed in
accordance with the laws of the State of Minnesota  (regardless of the laws that
might otherwise  govern under  applicable  Minnesota  principles of conflicts of
laws).

         9. Effectiveness. If this Agreement is executed by Shareholder prior to
the approval of the Merger  Agreement by the Company's Board of Directors,  then
this  Agreement  shall be subject to, and shall become  effective only upon, the
approval of the Merger  Agreement  by the  Company's  Board of  Directors.  This
Agreement shall terminate upon termination of the Merger Agreement in accordance
with its terms.


         IN WITNESS  WHEREOF,  Parent has caused this  Agreement  to  Facilitate
Merger to be  executed  by its duly  authorized  officer,  and  Shareholder  has
executed this Agreement, as of the date and year first above written.

                                           MEDTRONIC, INC.


                                           By
                                                Its:  Vice President


                                           SHAREHOLDER:



                                           [signature]


                                           [print name]


<PAGE>


                                                                     Exhibit D
                            NONCOMPETITION AGREEMENT


         THIS  AGREEMENT  is  entered  into  by and  between  __________________
("Individual") and Medtronic,  Inc., a Minnesota corporation  ("Parent"),  as of
________,  1998, but effective commencing on the date of the consummation of the
Merger  described  in the Merger  Agreement  referred to herein (the  "Effective
Date").

                                    RECITALS:

         WHEREAS, Individual is an employee, consultant,  officer, director or a
shareholder  of  AVECOR  Cardiovascular,  Inc.,  a  Minnesota  corporation  (the
"Company"); and

         WHEREAS,  Parent, the Company, and a wholly-owned  subsidiary of Parent
("Merger Subsidiary") is entering, or has entered, into an Agreement and Plan of
Merger  dated on or about July 12, 1998 (the  "Merger  Agreement"),  pursuant to
which, on the Effective Date, Parent will acquire the capital stock and business
(including  goodwill) of the Company by the merger of Merger Subsidiary with and
into the Company (the "Merger"); and

         WHEREAS, Individual will receive Parent common stock in the Merger; and

         WHEREAS,  Individual  desires to further  induce Parent to proceed with
the Merger Agreement and consummate the transactions  contemplated  thereby, and
it is a  condition  to  Parent's  obligations  under the Merger  Agreement  that
Individual enter into this Agreement;

         NOW, THEREFORE,  in consideration of the foregoing and to induce Parent
to proceed with the Merger  Agreement and to consummate the Merger,  and subject
to the terms and  conditions  set forth  herein,  the  parties  hereto  agree as
follows:

         1.  Definitions.  As used in this Agreement,  the following terms shall
have the meanings set forth or referenced below:

         "Company   Product"   means  any  product,   product   line,   process,
formulation,  or service (including any component thereof or research to develop
information  useful in connection  therewith) that, as of the Effective Date, is
being designed, developed, manufactured,  marketed, or sold by the Company or is
in planning by the Company for design, development,  manufacture,  marketing, or
sale.

          "Competitive  Product"  means  any  product,  product  line,  process,
formulation,  or service (including any component thereof or research to develop
information  useful  in  connection  therewith)  that  is  designed,  developed,
manufactured, marketed, or sold by anyone other than Parent and performs similar
functions, or is used for the same purposes as a Company Product.

         "Parent" means Medtronic, Inc. and all of its subsidiary and affiliated
corporations  (as defined  under the  Securities  and Exchange  Act of 1934,  as
amended) and the operating  divisions of any of them  (including but not limited
to the Company from and after the Merger).

         2. Noncompetition Covenant. From and after the Effective Date until the
[42-month/24-month]  anniversary  of the Effective  Date,  Individual  will not,
either alone or in any capacity with another person or legal entity:

         (a) directly or indirectly own any interest in, control, be employed by
or render  services  (including  but not limited to services in research) to any
person or entity, or subsidiary, subdivision, division, or joint venture of such
entity (except Parent), in connection with the design, development, manufacture,
marketing,  or  sale of a  Competitive  Product;  provided,  however,  that  the
foregoing shall not prohibit  Individual from holding a passive equity ownership
interest of less than 5% in a publicly  traded  entity and, if  Individual is an
employee  of Parent,  to the extent  such  ownership  is  permitted  by Parent's
conflict policies as generally applied);

         (b)  directly or  indirectly  hire or solicit any of the  Company's  or
Parent's  present or future employees for the purpose of hiring them or inducing
them to leave their  employment with the Company or Parent  (provided,  however,
such restriction shall be of no force and effect if any such employee leaves the
employ of Parent  without any  solicitation  by  Individual  or such employee is
terminated by Parent);

         (c) directly or indirectly solicit,  attempt to solicit,  interfere, or
attempt to  interfere  with the  Company's  or  Parent's  relationship  with its
customers or potential  customers for Company Products,  on behalf of Individual
or any other person or entity engaged in the design,  development,  manufacture,
marketing, or sale of a Competitive Product; or


<PAGE>

         (d) directly or indirectly  design,  develop,  manufacture,  market, or
sell any Competitive Product.

         The restrictions contained in this Section 2 of this Agreement will not
prevent   Individual  from  accepting   employment  with  a  large   diversified
organization with separate and distinct divisions that do not compete,  directly
or indirectly, with Parent, as long as prior to accepting such employment Parent
receives  separate  written  assurances from the  prospective  employer and from
Individual,  satisfactory  to Parent,  to the effect  that  Individual  will not
render any services,  directly or  indirectly,  to any division or business unit
that competes,  directly or indirectly, with Parent. From and after such time as
Parent has made a decision  through its Board of Directors not to continue,  and
has  ceased  for a period of six (6)  consecutive  months,  all of the  business
activities  with  which  the  activity  in  question  of  Individual   would  be
competitive,  then this  Agreement  will cease to be applicable to such specific
activity of Individual.

         3. Geographic Scope.  Individual  acknowledges that each of the Company
and  Parent  operates  throughout  the world  and that the  market  for  Company
Products is worldwide.  Individual therefore agrees that the covenants contained
in Section 2 shall apply within all counties of all states of the United  States
and within all counties,  provinces,  districts,  and/or other  comparable legal
boundaries elsewhere throughout the world.

         4.  Injunctive  Relief.  In  addition  to any other  relief or remedies
afforded by law or in equity, if Individual breaches this Agreement,  Individual
agrees that Parent shall be entitled, as a matter of right, to injunctive relief
in any  court of  competent  jurisdiction  plus  reasonable  attorneys'  fees if
successful  in securing  such relief.  Individual  recognizes  that products and
inventions  generated by Individual while an employee of the Company or pursuant
to the  consulting  while a  consultant  to the Company are the  property of the
Company,  the  value  of which  would  be  adversely  affected  by  Individual's
violation of this  Agreement,  and  Individual  hereby  admits that  irreparable
damage will result to Parent if Individual  violates or threatens to violate the
terms of this  Agreement.  This Section 4 shall not preclude the granting of any
other appropriate relief including,  without  limitation,  money damages against
Individual for breach of such sections of this Agreement.

         5.  Severability.   If  it  is  determined  by  a  court  of  competent
jurisdiction  that  any  term or  provision  of this  Agreement  is  invalid  or
unenforceable,  then (i) the  remaining  terms and  provisions  hereof  shall be
unimpaired,  and (ii) the invalid or  unenforceable  term or provision  shall be
deemed  replaced by a term or provision that is valid and  enforceable  and that
comes closest to expressing the intention of the invalid or  unenforceable  term
or provision.

         6. Authority.  Individual represents and warrants to Parent as follows:
(a)  Individual has full capacity and authority to enter into this Agreement and
to perform Individual's  obligations hereunder; (b) this Agreement has been duly
executed and delivered by Individual and constitutes a legal, valid, and binding
agreement of Individual,  enforceable  against Individual in accordance with its
terms, subject to bankruptcy,  insolvency, fraudulent transfer,  reorganization,
moratorium,  and similar laws of general applicability  relating to or affecting
creditors'  rights  and to  general  equity  principles;  and  (c)  neither  the
execution and delivery of this Agreement nor  compliance by Individual  with its
terms and  provisions  will violate any law,  statute,  regulation,  injunction,
order,  or  decree  of any  government  agency  or  authority  or court to which
Individual is subject.


<PAGE>

         7. Complete Agreement;  Effectiveness.  This Agreement  constitutes the
entire  agreement  between the parties hereto with respect to the subject matter
hereof and supersedes all prior agreements between the parties,  whether written
or oral,  relating  hereto.  Notwithstanding  any  contrary  provisions  of this
Agreement,  the  effectiveness of this Agreement is conditioned upon and subject
to the occurrence of the Merger.

         8. Waiver,  Discharge,  Amendment, Etc. The failure of any party hereto
to enforce at any time any of the provisions of this  Agreement  shall in no way
be construed to be a waiver of any such provision,  nor in any way to affect the
validity  of this  Agreement  or any part  thereof  or the  right  of the  party
thereafter to enforce each and every such provision.  No waiver of any breach of
this Agreement  shall be held to be a waiver of any other or subsequent  breach.
Any  amendment to this  Agreement  shall be in writing and signed by the parties
hereto.  This Agreement shall not be superseded by any future agreement  entered
into between  Individual  and Parent unless such future  agreement  specifically
refers to this Agreement by date and states  specifically  by section  reference
the  portions  of this  Agreement  that such  future  agreement  is  intended to
supersede.

         9.  Titles and  Headings;  Construction.  The titles  and  headings  to
sections  herein are inserted for the  convenience of reference only and are not
intended  to be a part of or to affect  the  meaning or  interpretation  of this
Agreement.  Individual  acknowledges  that  Individual  and Parent have  jointly
participated in the negotiation and drafting of this Agreement,  and the parties
agree that this Agreement  shall be construed  without regard to any presumption
or other rule  requiring  construction  hereof  against the party  causing  this
Agreement to be drafted.

         10.  Successors and Assigns.  This Agreement  shall be binding upon and
inure to the benefit of the parties hereto and their  respective  successors and
assigns;  provided,  however,  this  Agreement  may not be assigned  without the
express written consent of all parties,  except Parent may assign this Agreement
to a subsidiary of Parent or to such business organization that shall succeed to
the business of Parent or of such subsidiary to which this Agreement relates.

         11.  Governing Law. This Agreement shall be governed by and interpreted
in accordance with the laws of the State of Minnesota,  including all matters of
construction,  validity, performance, and enforcement,  without giving effect to
principles of conflict of laws.

         12.  Counterparts.  This  Agreement  may be  executed  in any number of
counterparts,  each of  which  shall  be  deemed  an  original  and all of which
together shall constitute one instrument.

         IN WITNESS WHEREOF,  each of the parties has caused this Noncompetition
Agreement to be executed in the manner appropriate to each, as of the date first
above written.




                                  [Individual]


                                  MEDTRONIC, INC.


                                  By:
                                       Its:  Vice President


<PAGE>
                                                                     Exhibit E
                             STOCK OPTION AGREEMENT


         THIS AGREEMENT is dated as of July 12, 1998, between Medtronic, Inc., a
Minnesota corporation ("Grantee"), and AVECOR Cardiovascular,  Inc., a Minnesota
corporation ("Issuer").

                                    RECITALS

         A. Grantee,  Issuer,  and AC Merger Corp., a Minnesota  corporation and
wholly-owned  subsidiary of Grantee ("Merger Subsidiary"),  are entering into an
Agreement  and Plan of Merger (the "Merger  Agreement")  which  provides,  among
other things, that, upon the terms and subject to the conditions thereof, Merger
Subsidiary will be merged with and into Issuer (the "Merger").

         B. Prior to the  execution  and  delivery  of this  Agreement,  certain
directors and officers of Issuer have,  to induce  Grantee to execute the Merger
Agreement, executed and delivered to Grantee the Agreements to Facilitate Merger
described in the Merger Agreement.

         C. As a further and  subsequent  inducement  to have Grantee enter into
the  Merger  Agreement,  Grantee  has  required  that  Issuer  enter  into  this
Agreement,  which provides,  among other things, that Issuer grant to Grantee an
option to purchase  shares of Issuer's  Common  Stock,  par value $.0l per share
("Issuer Common Stock"),  upon the terms and subject to the conditions  provided
for herein.

         NOW,  THEREFORE,  in consideration of the premises and mutual covenants
and agreements contained in this Agreement and the Merger Agreement, the parties
agree as follows:

         1.  Grant of  Option.  Subject  to the  terms  and  conditions  of this
Agreement,  Issuer hereby grants to Grantee an irrevocable option (the "Option")
to purchase  1,600,851 shares of Issuer Common Stock (the "Option  Shares"),  in
the manner set forth below,  at an exercise price of $11.125 per share of Issuer
Common  Stock,  subject to adjustment  as provided  below (the "Option  Price").
Issuer  represents that the Option Shares represent at least 19.9% of the number
of shares of Issuer  Common Stock  outstanding  on the date hereof.  Capitalized
terms used herein but not defined  herein  shall have the  meanings set forth in
the Merger Agreement.

         2. Exercise of option.

                  (a) Subject to the  satisfaction  or waiver of the  conditions
         set forth in Section 9 of this  Agreement,  prior to the termination or
         expiration of this Agreement in accordance  with its terms,  Grantee or
         its designee (which shall be a wholly-owned  subsidiary of Grantee) may
         exercise the option,  in whole or in part,  at any time or from time to
         time on or after the public disclosure of, or the time at which Grantee
         shall have learned of, the earliest of (i) or (ii) below to occur:

                           (i) the Merger  Agreement is  terminated  pursuant to
                  Section  7.1(e) of the Merger  Agreement  and within 12 months
                  after  termination  of the Merger  Agreement the Issuer enters
                  into an agreement  providing for an Alternative  Proposal,  or
                  the Merger  Agreement is terminated  pursuant to 7.1(f) of the
                  Merger Agreement; or

                           (ii) any third party makes an Alternative Proposal to
                  which  the  Issuer  has made a  response  or any  third  party
                  acquires 15% or more of the  outstanding  Issuer  Common Stock
                  prior to the Company Shareholders  Meeting, and either (A) the
                  requisite  vote of the  shareholders  of Issuer to approve the
                  Merger  is  not  obtained  or  (B)  the  Merger  Agreement  is
                  terminated  pursuant to Section 7.1(g) of the Merger Agreement
                  where the  Issuer's  breach is willful and  intentional  or is
                  terminated pursuant to Section 7.1(d) of the Merger Agreement,
                  and in the case of either (A) or (B)  above,  within 12 months
                  after  termination  of the Merger  Agreement the Issuer enters
                  into an agreement providing for an Alternative Proposal.


<PAGE>

                   (b) In the event  Grantee  wishes to  exercise  the Option at
         such time as the Option is  exercisable,  Grantee shall deliver written
         notice (the  "Exercise  Notice") to Issuer  specifying its intention to
         exercise  the Option,  the total  number of Option  Shares it wishes to
         purchase,  and a date and  time for the  closing  of such  purchase  (a
         "Closing") not less than three nor more than 30 business days after the
         later of (i) the  date  such  Exercise  Notice  is  given  and (ii) the
         expiration or termination  of any  applicable  waiting period under the
         Hart-Scott-Rodino  Antitrust  Improvements Act of 1976, as amended (the
         "HSR Act").  If prior to the Expiration  Date (as defined in Section 11
         below) any person or group (other than Grantee or its affiliates) shall
         have made a bona fide proposal that becomes  publicly  disclosed,  with
         respect to a tender offer or exchange offer for 50% or more of the then
         outstanding  shares of Issuer  Common  Stock (a  "Share  Proposal"),  a
         merger,  consolidation,   or  other  business  combination  (a  "Merger
         Proposal"),  or any acquisition of a material  portion of the assets of
         Issuer (an "Asset Proposal"), or shall have acquired 50% or more of the
         then outstanding shares of Issuer Common Stock (a "Share  Acquisition")
         , and  this  Option  is  then  exercisable,  then  Grantee,  in lieu of
         exercising the Option, shall have the right at any time on or after the
         date the  Termination  Fee (defined  below) under the Merger  Agreement
         becomes  due and payable to request in writing  that  Issuer  pay,  and
         promptly  (but in any event not more than  five  business  days)  after
         Grantee  makes such  request,  Issuer  shall,  subject to Section  2(c)
         below, pay to Grantee by certified  check,  official bank check or wire
         transfer  pursuant to Grantee's  instructions,  in  cancellation of the
         option, an amount in cash (the "Cancellation  Amount") equal to (i) the
         lesser of

                           (x) the excess  over the Option  Price of the greater
                  of (A) the last sale price of a share of Issuer  Common  Stock
                  as reported on the Nasdaq  National Market on the last trading
                  day prior to the date of the  Exercise  Notice,  or (B)(1) the
                  highest  price per share of Issuer  Common Stock offered to be
                  paid or paid by any such  person  or group  pursuant  to or in
                  connection with a Share Proposal,  a Share  Acquisition,  or a
                  Merger Proposal, or (2) the aggregate consideration offered to
                  be paid or paid in any transaction or proposed  transaction in
                  connection  with an Asset  Proposal,  divided by the number of
                  shares of Issuer Common Stock then outstanding, and

                           (y) $1.718 [$2.75  million  divided by initial number
                  of Option Shares],

         multiplied  by (ii) the  number of Option  Shares  then  covered by the
         Option;   provided,   however,   that  if,  prior  to  payment  of  the
         Cancellation  Amount,  Grantee has been paid by Issuer the  termination
         fee described in Section 7.2 of the Merger Agreement (the  "Termination
         Fee"),  then the  Cancellation  Amount  shall be reduced (but not below
         zero) to the extent  necessary so that the sum of the  Termination  Fee
         and the Cancellation  Amount shall not exceed $3.6 million. If all or a
         portion of the price per share of Issuer Common Stock offered, paid, or
         payable or the aggregate  consideration  offered,  paid, or payable for
         the assets of Issuer,  each as contemplated by the preceding  sentence,
         consists   of   noncash   consideration,   such   price  or   aggregate
         consideration  shall be the cash  consideration,  if any, plus the fair
         market value of the noncash consideration as mutually determined by the
         investment bankers of Issuer and the investment bankers of Grantee.

                  (c) Following exercise of the Option by Grantee,  in the event
         that  Grantee  sells,  pledges,  or otherwise  disposes of  (including,
         without limitation,  by merger or exchange) any of the Option Shares (a
         "Sale"),  then any Termination Fee due and payable by Issuer  following
         such time shall be reduced to the extent necessary so that the sum of

                           (x)  the Termination Fee and

                           (y)  the  amount  received  (whether  in  cash,  loan
                  proceeds,  securities,  or  otherwise) by Grantee in such Sale
                  less the exercise price of such Option Shares sold in the Sale
                  (the "Option Share Profit")

         shall not  exceed  $3.6  million.  If Issuer  has paid to  Grantee  the
         Termination Fee prior to the Sale, then Grantee shall immediately remit
         to Issuer by wire  transfer of  immediately  available  funds to a bank
         account  designated  by Issuer the excess,  if any, of the Option Share
         Profit over $850,000.


<PAGE>

         3. Payment of Option Price and  Delivery of  Certificate.  Any Closings
under  Section  2 of this  Agreement  shall be held at the  principal  executive
offices of Issuer,  or at such other place as Issuer and  Grantee may agree.  At
any Closing  hereunder,  (a) Grantee or its designee will make payment to Issuer
of the aggregate price for the Option Shares being so purchased by delivery of a
certified  check,  official bank check,  or wire  transfer of funds  pursuant to
Issuer's  instructions  payable  to  Issuer in an  amount  equal to the  product
obtained by  multiplying  the Option Price by the number of Option  Shares to be
purchased,  and (b) upon receipt of such payment  Issuer will deliver to Grantee
or its  designee  (which  shall  be a  wholly-owned  subsidiary  of  Grantee)  a
certificate or certificates  representing  the number of validly  issued,  fully
paid, and  nonassessable  Option Shares so purchased,  in the  denominations and
registered in such names (which shall be Grantee or a wholly-owned subsidiary of
Grantee) designated in writing to Issuer by Grantee.

         4.       Registration and Listing of Option Shares.

                  (a) Issuer  agrees to use its  reasonable  best efforts to (i)
         effect as  promptly  as  possible  upon the request of Grantee and (ii)
         cause to become and remain  effective for a period of not less than six
         months  (or such  shorter  period as may be  necessary  to  effect  the
         distribution of such shares) the  registration  under the 1933 Act, and
         any applicable  state securities laws, of all or any part of the Option
         Shares as may be specified in such request; provided, however, that (i)
         Grantee shall have the right to select the managing underwriter for any
         such  offering   after   consultation   with  Issuer,   which  managing
         underwriter shall be reasonably  acceptable to Issuer, and (ii) Grantee
         shall  not  be  entitled  to  more  than  two  effective   registration
         statements hereunder.

                  (b) In  addition  to  such  demand  registrations,  if  Issuer
         proposes to effect a  registration  of Issuer  Common Stock for its own
         account or for the account of any other  shareholder  of Issuer  (other
         than on Form S-4 or Form S-8),  Issuer will give prompt  written notice
         to all holders of Options or Option  Shares of its  intention  to do so
         and shall use its reasonable best efforts to include therein all Option
         Shares requested by Grantee to be so included,  provided,  however,  if
         Issuer  is in  registration  with  respect  to an  underwritten  public
         offering  of shares of Issuer  Common  Stock,  and if in the good faith
         judgment of the managing underwriter or managing  underwriters,  or, if
         none,  the sole  underwriter,  of such  offering  the  inclusion of the
         Option  Shares  and  any  other  selling   shareholder's  shares  would
         interfere with the successful  marketing of the shares of Issuer Common
         Stock,  the  number  of  Option  Shares  and  shares  of other  selling
         shareholders  otherwise  to be  covered in the  registration  statement
         contemplated  hereby may be reduced prorata.  No registration  effected
         under this  Section 4(b) shall  relieve  Issuer of its  obligations  to
         effect demand registrations under Section 4(a) hereof.

                  (c)  Registrations  effected  under  this  Section  4 shall be
         effected  at  Issuer's  expense,  including  the  reasonable  fees  and
         expenses  of counsel to the  holder of  Options or Option  Shares,  but
         excluding underwriting discounts and commissions to brokers or dealers.
         In connection with each registration under this Section 4, Issuer shall
         indemnify   and  hold  each   holder  of  Options   or  Option   Shares
         participating in such offering (a "Holder"), its underwriters, and each
         of their  respective  affiliates  harmless  against any and all losses,
         claims,   damage,   liabilities,   and  expenses  (including,   without
         limitation,  investigation  expenses  and  fees  and  disbursements  of
         counsel and accountants),  joint or several,  to which such Holder, its
         underwriters,  and  each of  their  respective  affiliates  may  become
         subject,  under  the 1933 Act or  otherwise,  insofar  as such  losses,
         claims,  damages,  liabilities,  or  expenses  (or  actions  in respect
         thereof) arise out of or are based upon an untrue  statement or alleged
         untrue  statement  of a material  fact  contained  in any  registration
         statement  (including  any  prospectus  therein),  or any  amendment or
         supplement  thereto,  or arise out of or are based upon the omission or
         alleged omission to state therein a material fact required to be stated
         therein or necessary  to make the  statements  therein not  misleading,
         other than such losses, claims, damages,  liabilities,  or expenses (or
         actions  in  respect  thereof)  that  arise out of or are based upon an
         untrue  statement  or  alleged  untrue  statement  of a  material  fact
         contained  in  written  information  furnished  by a Holder  to  Issuer
         expressly for use in such registration statement.


<PAGE>

                  (d) In connection with any registration  statement pursuant to
         this  Section  4,  each  Holder  agrees  to  furnish  Issuer  with such
         information  concerning itself and the proposed sale or distribution as
         shall  reasonably  be required in order to ensure  compliance  with the
         requirements of the 1933 Act. In addition,  Grantee shall indemnify and
         hold Issuer,  its underwriters and each of their respective  affiliates
         harmless against any and all losses, claims, damages,  liabilities, and
         expenses  (including,  without limitation,  investigation  expenses and
         fees and disbursements of counsel and  accountants),  joint or several,
         to  which  Issuer,  its  underwriters,  and  each of  their  respective
         affiliates may become subject under the 1933 Act or otherwise,  insofar
         as such losses, claims, damages,  liabilities,  or expenses (or actions
         in respect  thereof) arise out of or are based upon an untrue statement
         or alleged  untrue  statement of a material  fact  contained in written
         information furnished by any Holder to Issuer expressly for use in such
         registration statement.

                  (e) Upon the issuance of Option Shares hereunder,  Issuer will
         use its  reasonable  best efforts  promptly to list such Option  Shares
         with the Nasdaq  National  Market or on such national or other exchange
         on which the shares of Issuer Common Stock are at the time listed.

         5.  Representations and Warranties of Issuer.  Issuer hereby represents
and warrants to Grantee as follows:

                  (a) Issuer is a corporation duly organized,  validly existing,
         and in good  standing  under the laws of the State of Minnesota and has
         requisite power and authority to enter into and perform this Agreement.

                  (b) The  execution  and  delivery  of this  Agreement  and the
         consummation of the transactions contemplated hereby have been duly and
         validly  authorized  by the Board of Directors of Issuer,  and no other
         corporate  proceedings on the part of Issuer are necessary to authorize
         this Agreement or to consummate the transactions  contemplated  hereby.
         The Board of  Directors  of Issuer has duly  approved  the issuance and
         sale of the Option Shares, upon the terms and subject to the conditions
         contained in this Agreement,  and the  consummation of the transactions
         contemplated  hereby. This Agreement has been duly and validly executed
         and delivered by Issuer and,  assuming this Agreement has been duly and
         validly authorized,  executed, and delivered by Grantee,  constitutes a
         valid and binding  obligation of Issuer  enforceable  against Issuer in
         accordance   with  its  terms,   subject  to  bankruptcy,   insolvency,
         reorganization, moratorium, or other similar laws affecting or relating
         to creditors,  rights generally;  the availability of injunctive relief
         and  other  equitable  remedies;  and  limitations  imposed  by  law on
         indemnification for liability under federal securities laws.

                  (c) Issuer has taken all  necessary  action to  authorize  and
         reserve for issuance  and to permit it to issue,  and at all times from
         the date of this Agreement through the date of expiration of the Option
         will have  reserved  for  issuance  upon  exercise of the Option,  such
         number of  authorized  shares of Issuer Common Stock as is equal to the
         number of  Option  Shares  (or such  other  amount  as may be  required
         pursuant to Section 10 hereof),  each of which,  upon issuance pursuant
         to this Agreement and when paid for as provided herein, will be validly
         issued, fully paid, and nonassessable,  and shall be delivered free and
         clear  of  all  claims,  liens,  charges,  encumbrances,  and  security
         interests and not subject to any preemptive rights.

                  (d) The execution, delivery, and performance of this Agreement
         by Issuer and the consummation by it of the  transactions  contemplated
         hereby  except as required by the HSR Act (if  applicable),  and,  with
         respect to Section 4,  compliance  with the  provisions of the 1933 Act
         and any applicable  state  securities laws, do not require the consent,
         waiver,  approval,  license,  or  authorization  of or  result  in  the
         acceleration  of any obligation  under,  or constitute a default under,
         any term,  condition,  or  provision  of any  charter or bylaw,  or any
         indenture,  mortgage,  lien, lease,  agreement,  contract,  instrument,
         order, judgment, ordinance, regulation, or decree or any restriction to
         which  Issuer or any property of Issuer or its  subsidiaries  is bound,
         except where the failure to obtain such consents,  waivers,  approvals,
         licenses,  or  authorizations  or where such  acceleration  or defaults
         could not, individually or in the aggregate,  reasonably be expected to
         have a Company Material Adverse Effect.


<PAGE>

         6. Representations and Warranties of Grantee. Grantee hereby represents
and warrants to Issuer that:

                  (a) Grantee is a corporation duly organized, validly existing,
         and in good  standing  under the laws of the State of Minnesota and has
         requisite power and authority to enter into and perform this Agreement.

                  (b) The  execution  and  delivery  of this  Agreement  and the
         consummation of the transactions contemplated hereby have been duly and
         validly  authorized by the Board of Directors of Grantee,  and no other
         corporate proceedings on the part of Grantee are necessary to authorize
         this Agreement or to consummate the transactions  contemplated  hereby.
         This  Agreement  has been duly and validly  executed  and  delivered by
         Grantee  and,  assuming  this  Agreement  has been  duly  executed  and
         delivered  by Issuer,  constitutes  a valid and binding  obligation  of
         Grantee  enforceable  against  Grantee  in  accordance  with its terms,
         subject to bankruptcy, insolvency, reorganization, moratorium, or other
         similar laws affecting or relating to creditors' rights generally;  the
         availability  of injunctive  relief and other equitable  remedies;  and
         limitations  imposed  by law on  indemnification  for  liability  under
         federal securities laws.

                  (c)  Grantee or its  designee is  acquiring  the Option and it
         will acquire the Option Shares  issuable upon the exercise  thereof for
         its own  account  and not  with a view to the  distribution  or  resale
         thereof in any manner not in accordance with applicable law.

         7.  Covenants of Grantee.  Grantee  agrees not to transfer or otherwise
dispose of the Option or the Option Shares, or any interest  therein,  except in
compliance with the 1933 Act and any applicable  state  securities law.  Grantee
further  agrees to the  placement of the following  legend on the  certificates)
representing  the  Option  Shares (in  addition  to any  legend  required  under
applicable state securities laws):

                  "THE  SHARES  REPRESENTED  BY THIS  CERTIFICATE  HAVE NOT BEEN
                  REGISTERED  UNDER EITHER (1) THE  SECURITIES  ACT OF 1933,  AS
                  AMENDED (THE "ACT"), OR (2) ANY APPLICABLE STATE LAW GOVERNING
                  THE  OFFER  AND  SALE OF  SECURITIES.  NO  TRANSFER  OR  OTHER
                  DISPOSITION OF THESE SHARES, OR OF ANY INTEREST  THEREIN,  MAY
                  BE MADE EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT
                  UNDER  THE ACT AND  SUCH  OTHER  STATE  LAWS  OR  PURSUANT  TO
                  EXEMPTIONS FROM  REGISTRATION  UNDER THE ACT, SUCH OTHER STATE
                  LAWS, AND THE RULES AND REGULATIONS PROMULGATED THEREUNDER."

         8. Reasonable Best Efforts.  Grantee and Issuer shall take, or cause to
be  taken,   all  reasonable   action  to  consummate  and  make  effective  the
transactions  contemplated by this  Agreement,  including,  without  limitation,
reasonable  best efforts to obtain any  necessary  consents of third parties and
governmental  agencies and the filing by Grantee and Issuer  promptly  after the
date  hereof  of any  required  HSR Act  notification  forms  and the  documents
required to comply with the HSR Act.

         9. Certain Conditions.  The obligation of Issuer to issue Option Shares
under  this  Agreement  upon  exercise  of the  Option  shall be  subject to the
satisfaction or waiver of the following conditions:

                  (a) any waiting  periods  applicable to the acquisition of the
         Option Shares by Grantee  pursuant to this Agreement  under the HSR Act
         shall have expired or been terminated;

                  (b) the  representations  and  warranties  of Grantee  made in
         Section 6 of this  Agreement  shall be true and correct in all material
         respects as of the date of the Closing for the  issuance of such Option
         Shares; and

                  (c) no order,  decree,  or injunction  entered by any court of
         competent jurisdiction or governmental,  regulatory,  or administrative
         agency or  commission  in the  United  States  shall be in effect  that
         prohibits  the exercise of the option or  acquisition  of Option Shares
         pursuant to this Agreement.


<PAGE>

         10.  Adjustments  Upon Changes in  Capitalization.  In the event of any
change in the number of issued and outstanding  shares of Issuer Common Stock by
reason of any stock  dividend,  stock split,  recapitalization,  merger,  rights
offering,  share exchange, or other change in the corporate or capital structure
of Issuer,  Grantee shall  receive,  upon  exercise of the Option,  the stock or
other securities, cash, or property to which Grantee would have been entitled if
Grantee  had  exercised  the Option and had been a holder of record of shares of
Issuer  Common  Stock on the record date fixed for  determination  of holders of
shares  of  Issuer  Common  Stock  entitled  to  receive  such  stock  or  other
securities,  cash,  or property  at the same  aggregate  price as the  aggregate
Option Price of the Option Shares.

         11.  Expiration.  The  Option  shall  expire at the  earlier of (a) the
Effective  Time (as  defined  in the  Merger  Agreement)  or (b) if  exercisable
pursuant  to  Section  2 hereof,  18  months  after  termination  of the  Merger
Agreement in accordance with the terms thereof (such expiration date is referred
to as the "Expiration Date").

         12.      General Provisions.

                  (a)  Survival.  All of the  representations,  warranties,  and
         covenants  contained  herein  shall  survive  each Closing and shall be
         deemed to have been  made as of the date  hereof  and as of the date of
         each Closing.

                  (b) Further  Assurances.  If Grantee  exercises the Option, or
         any portion  thereof,  in accordance  with the terms of this Agreement,
         Issuer and Grantee will execute and deliver all such further  documents
         and instruments and use their  reasonable best efforts to take all such
         further  action  as  may  be  necessary  in  order  to  consummate  the
         transactions contemplated thereby.

                  (c)  Severability.  It is the desire and intent of the parties
         that the provisions of this Agreement be enforced to the fullest extent
         permissible   under  the  law  and  public  policies  applied  in  each
         jurisdiction in which enforcement is sought.  Accordingly, in the event
         that any provision of this Agreement would be held in any  jurisdiction
         to be  invalid,  prohibited,  or  unenforceable  for any  reason,  such
         provision,  as to such  jurisdiction,  shall  be  ineffective,  without
         invalidating  the remaining  provisions of this  Agreement or affecting
         the  validity  or   enforceability  of  such  provision  in  any  other
         jurisdiction. Notwithstanding the foregoing, if such provision could be
         more narrowly drawn so as not be invalid,  prohibited, or unenforceable
         in such jurisdiction, it shall, as to such jurisdiction, be so narrowly
         drawn,  without invalidating the remaining provisions of this Agreement
         or affecting the validity or  enforceability  of such  provision in any
         other jurisdiction.

                  (d)  Assignment.  This Agreement shall be binding on and inure
         to the benefit of the parties  hereto and their  respective  successors
         and assigns;  provided,  however,  that Issuer shall not be entitled to
         assign or otherwise transfer any of its rights or obligations hereunder
         and, prior to the option  becoming  exercisable  pursuant to Section 2,
         this Agreement may not be assigned by Grantee.

                  (e) Specific  Performance.  The parties agree and  acknowledge
         that in the event of a breach of any provision of this  Agreement,  the
         aggrieved party would be without an adequate remedy at law. The parties
         therefore  agree that in the event of a breach of any provision of this
         Agreement,  the  aggrieved  party may elect to institute  and prosecute
         proceedings in any court of competent  jurisdiction to enforce specific
         performance or to enjoin the continuing  breach of such  provision,  as
         well as to obtain damages for breach of this  Agreement.  By seeking or
         obtaining any such relief,  the  aggrieved  party will not be precluded
         from seeking or obtaining any other relief to which it may be entitled.

                  (f) Amendments.  This Agreement may not be modified,  amended,
         altered,  or  supplemented  except upon the execution and delivery of a
         written agreement executed by Grantee and Issuer.


<PAGE>

                  (g) Notices. All notices, requests, claims, demands, and other
         communications  hereunder shall be in writing and shall be deemed to be
         sufficient  if  contained in a written  instrument  and shall be deemed
         given    if    delivered     personally,     telecopied,     sent    by
         nationally-recognized  overnight  courier  or mailed by  registered  or
         certified mail (return  receipt  requested),  postage  prepaid,  to the
         other party at the  following  addresses  (or such other  address for a
         party as shall be specified by like notice):

                  If to Grantee:

                   Medtronic, Inc.
                   7000 Central Avenue N.E.
                   Minneapolis, MN 55432

                   with separate copies thereof addressed to

                   Attention:       General Counsel
                                    FAX:  (612) 572-5459
                   and

                   Attention:       Vice President and Chief Development Officer
                                    FAX: (612) 572-5404

                  If to Issuer:

                   AVECOR Cardiovascular, Inc.
                   7611 Northland Drive
                   Minneapolis, MN 55428
                   FAX: (612) 391-9106
                   Attention:  Anthony Badolato, CEO

                   with a copy to:

                   Oppenheimer Wolff & Donnelly LLP
                   Plaza VII Building
                   45 South Seventh Street
                   Minneapolis, MN 55402
                   FAX: (612) 7100
                   Attention:  Richard Lareau

                   (h) Headings.  The headings  contained in this  Agreement are
         for reference purposes only and shall not affect in any way the meaning
         or interpretation of this Agreement.

                  (i)  Counterparts.  This  Agreement  may be executed in one or
         more counterparts, each of which shall be an original, but all of which
         together shall constitute one and the same agreement.

                  (j)  Governing  Law. This  Agreement  shall be governed by and
         construed  in  accordance  with  the  laws of the  State  of  Minnesota
         applicable to contracts made and to be performed therein.

                  (k) Jurisdiction and Venue.  Each of Issuer and Grantee hereby
         agrees that any proceeding  relating to this Agreement shall be brought
         in a state  court of  Minnesota.  Each of  Issuer  and  Grantee  hereby
         consents to  personal  jurisdiction  in any such action  brought in any
         such Minnesota court, consents to service of process by registered mail
         made upon such party and such party's  agent,  and waives any objection
         to venue  in any such  Minnesota  court or to any  claim  that any such
         Minnesota court is an inconvenient forum.

                  (l) Entire  Agreement.  This  Agreement,  the  Confidentiality
         Agreement,  and the Merger  Agreement and any documents and instruments
         referred to herein and therein  constitute the entire agreement between
         the parties  hereto and  thereto  with  respect to the  subject  matter
         hereof  and  thereof  and  supersede  all other  prior  agreements  and
         understandings, both written and oral, between the parties with respect
         to the subject  matter  hereof and  thereof.  This  Agreement  shall be
         binding  upon,  inure to the  benefit  of,  and be  enforceable  by the
         successors and permitted assigns of the parties hereto. Nothing in this
         Agreement  shall be construed to give any person other than the parties
         to this Agreement or their respective  successors or permitted  assigns
         any legal or equitable right,  remedy,  or claim under or in respect of
         this Agreement or any provision contained herein.

                  (m) Expenses.  Except as otherwise  provided in this Agreement
         or the Merger Agreement, each party shall pay its own expenses incurred
         in connection with this Agreement.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be signed
by their  respective  officers  thereunto  duly  authorized as of the date first
written above.

                                       MEDTRONIC, INC.


                                       By /s/ Michael D. Ellwein
                                           Its:  Vice President


                                       AVECOR CARDIOVASCULAR, INC.


                                       By /s/ Anthony Badolato
                                           Its:  CEO




<PAGE>
                                                                      Exhibit F
                        OPINION OF THE COMPANY'S COUNSEL


         1. The Company has the requisite  corporate power to execute,  deliver,
and perform the Merger Agreement and to consummate the transactions contemplated
thereby.

         2. The  execution,  delivery,  and  performance  by the  Company of the
Merger  Agreement  and  the  consummation  by the  Company  of the  transactions
contemplated thereby have been duly authorized by the shareholders and the Board
of Directors of the Company,  and no other  corporate  action on the part of the
Company is necessary to authorize the execution,  delivery,  and  performance by
the Company of the Merger  Agreement and the  consummation by the Company of the
transactions contemplated thereby.

         3.  The  Merger  Agreement  has  been  duly and  validly  executed  and
delivered by the Company and  constitutes a valid and binding  obligation of the
Company, enforceable against the Company in accordance with its terms.

         4.  Except as  specifically  disclosed  in  Section  3.6 of the  Merger
Agreement  or Section 3.6 of the Company  Disclosure  Schedule,  the  execution,
delivery and performance by the Company of the Merger Agreement,  the compliance
by the Company with the provisions thereof,  and the consummation by the Company
of the transactions  contemplated thereby will not: (i) violate any provision of
the Articles of Incorporation  or Bylaws of the Company or any Subsidiary;  (ii)
violate any  statute,  rule,  regulation,  order or decree of any public body or
authority  (including,  but  not  limited  to,  the  FDA or any  nongovernmental
self-regulatory  agency) by which the Company or any  Subsidiary or any of their
respective  properties or assets may be bound;  (iii) require any filing with or
permit, consent or approval of any federal,  state, local or foreign public body
or  authority  (including,  but not limited to, the FDA or any  non-governmental
self-regulatory  agency);  or (iv)  result in any  violation  or  breach  of, or
constitute  a  default  under,  or  give  rise  to  any  right  of  termination,
cancellation,  increased  payments,  or  acceleration  under,  or  result in the
creation  of any Lien on any of the  properties  or assets of the Company or any
Subsidiary  under,  any of the terms,  conditions or provisions of any agreement
listed in the Disclosure  Schedule,  except,  (x) in the case of clauses (ii) or
(iii),  where  such  violation,  failure  to make any such  filing or failure to
obtain such permit, consent or approval, would not prevent or delay consummation
of this Merger or otherwise  prevent the Company from performing its obligations
under this Agreement and would not have a Company Material  Adverse Effect,  and
(y) in the case of clause (iv), for any such violations,  breaches, defaults, or
other  occurrences  that would not prevent or delay  consummation  of any of the
transactions  contemplated by the Merger Agreement in any material  respect,  or
otherwise  prevent the Company from performing its obligations  under the Merger
Agreement in any material respect, and would not have a Company Material Adverse
Effect.



<PAGE>

                                                                      Exhibit G
                           OPINION OF PARENT'S COUNSEL


         1. Each of Parent and Merger  Subsidiary  has the  requisite  corporate
power to execute,  deliver,  and perform the Merger  Agreement and to consummate
the transactions contemplated thereby.

         2. The  execution,  delivery,  and  performance  by Parent  and  Merger
Subsidiary  of  the  Merger  Agreement  and  the  consummation  by  them  of the
transactions  contemplated  thereby  have been duly  authorized  by the Board of
Directors  of Parent and the  shareholder  and the Board of  Directors of Merger
Subsidiary,  and no other  corporate  action  on the part of  Parent  or  Merger
Subsidiary is necessary to authorize the execution, delivery, and performance by
Parent and Merger  Subsidiary of the Merger  Agreement and the  consummation  by
them of the transactions contemplated thereby.

         3.  The  Merger  Agreement  has  been  duly and  validly  executed  and
delivered by Parent and Merger  Subsidiary  and  constitutes a valid and binding
obligation of them, enforceable against them in accordance with its terms.

         4.  Except as  specifically  disclosed  in  Section  4.4 of the  Merger
Agreement,  the  execution,  delivery  and  performance  by  Parent  and  Merger
Subsidiary of the Merger  Agreement,  the compliance by them with the provisions
thereof,  and the consummation by them of the transactions  contemplated thereby
will not: (i) violate any provision of the Articles of  Incorporation  or Bylaws
of Parent or Merger  Subsidiary;  (ii)  violate any statute,  rule,  regulation,
order, or decree of any public body or authority (including, but not limited to,
the FDA or any non-governmental  self-regulatory  agency) by which Parent or any
of its  subsidiaries  or any of their  respective  properties  or assets  may be
bound;  (iii)  require  any filing  with or permit,  consent or  approval of any
public  body  or  authority  (including,  but  not  limited  to,  the FDA or any
nongovernmental  self-regulatory  agency);  or (iv) result in any  violation  or
breach  of,  or  constitute  a  default  under,  or give  rise to any  right  of
termination,  cancellation, increased payments, or acceleration under, or result
in the creation of any lien on any of the  properties or assets of Parent or its
subsidiaries under, any of the terms, conditions, or provisions of any agreement
filed as an exhibit to Parent's Form 10-K for its 1997 fiscal year,  except, (x)
in the case of clauses (ii) or (iii), where such violation,  failure to make any
such filing or failure to obtain such  permit,  consent or  approval,  would not
prevent or delay  consummation  of this Merger or otherwise  prevent Parent from
performing  its  obligations  under this  Agreement  and would not have a Parent
Material  Adverse  Effect,  and (y) in the  case of  clause  (iv),  for any such
violations,  breaches,  defaults or other  occurrences that would not prevent or
delay  consummation  of any  of  the  transactions  contemplated  by the  Merger
Agreement in any material  respect,  or otherwise prevent Parent from performing
its obligations  under the Merger Agreement in any material  respect,  and would
not have a Parent Material Adverse Effect.





                                                                       Exhibit 5
                            FREDRIKSON & BYRON, P.A.
                                Attorneys At Law
                            1100 International Centre
                             900 Second Avenue South
                           Minneapolis, MN 55402-3397
                                 (612) 347-7000
                               FAX: (612) 347-7077

                                 August 26, 1998

Medtronic, Inc.
7000 Central Avenue N.E.
Minneapolis, Minnesota  55432

 Re:  Registration Statement on Form S-4

Ladies/Gentlemen:

         We are  acting as  counsel  for  Medtronic,  Inc.  (the  "Company"),  a
Minnesota  corporation,  in connection  with the  registration by the Company of
1,557,020  shares of the Company's  Common Stock, par value $.10 (the "Shares"),
each of which shares  includes the  Preferred  Stock  Purchase  Rights  attached
thereto (the "Rights"), pursuant to the Company's Registration Statement on Form
S-4  being  filed  with  the  Securities  and  Commission   (the   "Registration
Statement").  The Shares and the Rights are to be issued in connection  with the
merger of AC Merger Corp. ("Merger  Subsidiary"),  a wholly-owned  subsidiary of
the Company,  with and into AVECOR  Cardiovascular Inc. ("AVECOR"),  pursuant to
the  Agreement  and Plan of  Merger  dated as of July 12,  1998 by and among the
Company, Merger Subsidiary, and AVECOR (the "Merger Agreement").

         In connection with rendering this opinion,  we have examined and relied
upon originals or copies, certified or otherwise identified to our satisfaction,
of such corporate  records,  agreements and other  instruments,  certificates of
officers, certificates of public officials and other documents as we have deemed
necessary or appropriate as a basis for the opinions expressed herein.

         In connection with our examination,  we have assumed the genuineness of
all signatures,  the authenticity of all documents  tendered to us as originals,
the legal  capacity  of all  natural  persons  and the  conformity  to  original
documents of all documents submitted to us as certified or photostatic copies.

         Based on, and subject to, the foregoing, it is our opinion that:

         1. The Company has the corporate  authority to issue the Shares and the
Rights  in the  manner  and  under  the  terms  set  forth  in the  Registration
Statement.

         2. The Shares have been duly  authorized and, when issued and delivered
to holders of AVECOR common stock in accordance with the Merger Agreement,  will
be validly issued, fully paid and nonassessable.

         3. The Rights have been duly  authorized and, when issued and delivered
in accordance with the Shareholder  Rights Plan referred to in the  Registration
Statement, will be validly issued, fully paid and nonassessable.

         We hereby  consent  to the  filing of this  opinion as Exhibit 5 to the
Registration  Statement,  to its use as a part of the Registration Statement and
to  the  use of  our  name  under  the  caption  "Legal  Matters"  in the  Proxy
Statement/Prospectus constituting a part of the Registration Statement.

Very truly yours,

/s/ Fredrikson & Byron, P.A.

FREDRIKSON & BYRON, P.A.


                                                                       Exhibit 8

             OPINION AND CONSENT OF OPPENHEIMER WOLFF & DONNELLY LLP



                                                             _____________, 1998

AVECOR Cardiovascular Inc.
7611 Northland Drive
Minneapolis, Minnesota 55428

Ladies and Gentlemen:

We are acting as your counsel in  connection  with the proposed  acquisition  by
Medtronic,  Inc. ("Medtronic") of AVECOR Cardiovascular Inc. ("AVECOR") pursuant
to the  proposed  merger  (the  "Merger")  of AC Merger  Corp.,  a  wholly-owned
subsidiary  of  Medtronic  ("Merger  Subsidiary"),   into  AVECOR,  with  AVECOR
surviving the Merger.  The Merger will be consummated  pursuant to the Agreement
and Plan of Merger by and among  Medtronic,  Merger  Subsidiary and AVECOR dated
July 12, 1998 (the "Merger Agreement").

Medtronic  has filed  with the  Securities  and  Exchange  Commission  under the
Securities Act of 1933, as amended (the "1933 Act"), a registration statement on
Form S-4 (the  "Registration  Statement")  with  respect to the common  stock of
Medtronic  to be issued to the  holders  of shares of common  stock of AVECOR in
connection  with the Merger.  In addition,  Medtronic has prepared,  and we have
reviewed, a Proxy  Statement/Prospectus which is contained in and made a part of
the  Registration  Statement  (the "Proxy  Statement"),  and the  Appendices and
Exhibits thereto,  including the Merger Agreement.  In rendering the opinion set
forth  below,  we have relied upon the facts stated in the Proxy  Statement  and
upon  such  other  documents  as  we  have  deemed  appropriate,  including  the
representations  of Medtronic and AVECOR  referred to in the Proxy Statement and
set forth in certain tax representation letters from Medtronic and AVECOR.

We have assumed that all parties to the Merger  Agreement  have acted,  and will
act, in accordance  with the terms of such Merger  Agreement and that the Merger
Agreement  will be  consummated  at the effective time pursuant to the terms and
conditions set forth in the Merger Agreement  without the waiver or modification
of any such terms and conditions.

Based upon and subject to the foregoing, and to the qualifications, limitations,
representations and assumptions  contained in the portion of the Proxy Statement
captioned "The Merger--Certain  Federal Income Tax Consequences," and in certain
tax representation letters from Medtronic and AVECOR, it is our opinion that the
portion of the Proxy Statement captioned "The Merger--Certain Federal Income Tax
Consequences"  describes the principal  federal income tax  consequences  of the
Merger to Medtronic,  Merger  Subsidiary,  AVECOR and the holders of outstanding
AVECOR  common  stock.  No opinion is expressed on any matters  other than those
specifically referred to herein.

This  opinion is furnished to you for use in  connection  with the  Registration
Statement  and may not be used for any other  purpose  without our prior express
written  consent.  We hereby consent to the filing of this opinion as an exhibit
to the Registration  Statement and to the use of our name in that portion of the
Proxy Statement captioned "The Merger--Certain Federal Income Tax Consequences."
In giving such  consent,  we do not thereby admit that we are in the category of
persons whose consent is required under Section 7 of the 1933 Act.

                                                            Very truly yours,





                                                                    Exhibit 23.3

                      CONSENT OF PRICEWATERHOUSECOOPERS LLP


We  hereby   consent   to  the   incorporation   by   reference   in  the  Proxy
Statement/Prospectus  constituting part of this  Registration  Statement on Form
S-4 of Medtronic, Inc. of our report dated May 26, 1998, which appears on page 5
of Medtronic's 1998 Annual  Report--Financial  Review,  which is incorporated by
reference  in its Annual  Report on Form 10-K for the year ended April 30, 1998.
We also consent to the incorporation by reference of our report on the Financial
Statement Schedule, which appears on page 13 of such Annual Report on Form 10-K.
We also consent to the reference to us under the heading  "Experts" in the Proxy
Statement/Prospectus.


/s/ PricewaterhouseCoopers LLP

PRICEWATERHOUSECOOPERS LLP

Minneapolis, Minnesota
August 24, 1998



                                                                    Exhibit 23.4

                      CONSENT OF PRICEWATERHOUSECOOPERS LLP


We hereby  consent  to the  inclusion  or  incorporation  by  reference  in this
Registration Statement on Form S-4 of Medtronic, Inc. of our reports dated March
16,  1998 on our audits of the  consolidated  financial  statements  and related
financial  statement schedule of AVECOR  Cardiovascular  Inc. We also consent to
the  references  to our firm under the  caption  "Experts"  in this Registration
Statement.


/s/ PricewaterhouseCoopers LLP

PRICEWATERHOUSECOOPERS LLP

Minneapolis, Minnesota
August 24, 1998



                                                                    Exhibit 23.5

                          CONSENT OF PIPER JAFFRAY INC.


We hereby  consent  to  inclusion  of our  opinion  as  Appendix  D to the Proxy
Statement/Prospectus  of AVECOR Cardiovascular Inc. and Registration on Form S-4
of Medtronic,  Inc.,  and further  consent to reference  therein to such opinion
under the  headings  "The  Merger--Opinion  of AVECOR's  Financial  Advisor" and
"Summary"  and in the  AVECOR  letter to  shareholders  regarding  the  proposed
Merger. In giving such consent, we do not admit that we come within the category
of persons whose consent is required  under Section 7 of the  Securities  Act of
1933 and the rules and regulations thereunder.


/s/ Piper Jaffray Inc.

PIPER JAFFRAY INC.

Minneapolis, Minnesota
August 26, 1998

                                                                      Exhibit 24

                                POWER OF ATTORNEY


         KNOW ALL BY THESE PRESENTS,  that each of the undersigned directors and
officers of  Medtronic,  Inc.,  a Minnesota  corporation  ("Medtronic"),  hereby
constitutes  and  appoints  WILLIAM W.  GEORGE and RONALD E. LUND,  or either of
them, their true and lawful  attorneys-in-fact  and agents, each with full power
and authority to act as such without the other,  with full power of substitution
and resubstitution, for the undersigned and in the undersigned's name, place and
stead,  in any and all  capacities,  to do any and all  acts and  things  and to
execute any and all  instruments  that any of said attorneys and agents may deem
necessary or advisable in  connection  with  Medtronic's  acquisition  of AVECOR
Cardiovascular,  Inc., to enable  Medtronic to comply with the Securities Act of
1933, as amended, with any regulations,  rules or requirements of the Securities
and  Exchange  Commission  thereunder,  and  with  any  state  Blue  Sky laws or
regulations  in  connection  therewith,   including  specifically,  but  without
limiting the generality of the foregoing,  power and authority to sign the names
of the undersigned to the  Registration  Statement on Form S-4, to any amendment
to  such  Registration  Statement,  and to  any  other  registration  statement,
prospectus, instrument or document filed with said Commission as a part of or in
connection with such Registration  Statement or any amendment  thereto;  and the
undersigned  hereby ratify and confirm all that said  attorneys  and agents,  or
their  substitutes  or  resubstitutes,  may  lawfully  do or cause to be done by
virtue hereof.

         IN WITNESS  WHEREOF,  the undersigned  have  subscribed  these presents
effective as of the 21st day of August, 1998.


/s/ William R. Brody, M.D., Ph.D.                /s/ Glen D. Nelson, M.D.
William R. Brody, M.D., Ph.D.                    Glen D. Nelson, M.D.

/s/ Paul W. Chellgren                            /s/ Robert L. Ryan
Paul W. Chellgren                                Robert L. Ryan

/s/ Arthur D. Collins, Jr.                       /s/ Richard L. Schall
Arthur D. Collins, Jr.                           Richard L. Schall

/s/ William W. George                            /s/ Jack W. Schuler
William W. George                                Jack W. Schuler

/s/ Antonio M. Gotto, Jr., M.D.                  /s/ Gerald W. Simonson
Antonio M. Gotto, Jr., M.D.                      Gerald W. Simonson

/s/ Bernadine P. Healy, M.D.                     /s/ Gordon M. Sprenger
Bernadine P. Healy, M.D.                         Gordon M. Sprenger

/s/ Thomas E. Holloran                           /s/ Richard A. Swalin, Ph.D.
Thomas E. Holloran                               Richard A. Swalin, Ph.D.





                                                                    Exhibit 99.1
                           AVECOR CARDIOVASCULAR INC.
                         SPECIAL MEETING OF SHAREHOLDERS

          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS.

         The  undersigned  shareholder  hereby  appoints  Anthony  Badolato  and
Gregory  J.  Melsen  and each of them,  as  proxies,  each  with  full  power of
substitution,  and hereby  authorizes  each of them to represent and to vote, as
designated below, all shares of common stock of AVECOR  Cardiovascular Inc. held
of record by the  undersigned as of __________,  1998, at the Special Meeting of
Shareholders to be held on ___________,  1998, at 9:00 a.m., local time, at 7611
Northland Drive, Minneapolis,  Minnesota, and at any adjournment or adjournments
thereof, upon the following proposal:

         To  approve  the Plan of Merger  and the  Agreement  and Plan of Merger
providing  for the merger of AC Merger Corp.  into AVECOR  Cardiovascular  Inc.,
with  AVECOR   Cardiovascular  Inc.  to  be  the  surviving  corporation  and  a
wholly-owned  subsidiary of Medtronic,  Inc., copies of which Plan of Merger and
Agreement  and Plan of Merger are  attached as  Appendices  A and B to the Proxy
Statement/Prospectus for the Special Meeting.

         [ ] FOR        [ ] AGAINST      [ ]  ABSTAIN

         This proxy when  properly  executed,  will be voted as specified by the
shareholder,  but if no  choice  is  specified,  this  proxy  will be voted  FOR
approval of the Plan of Merger and the Agreement and Plan of Merger.

         (Continued and to be signed and dated on the other side)

         IMPORTANT:  Please sign  exactly as name or names appear on this Proxy.
Joint owners should each sign  personally.  When signing as attorney,  executor,
administrator,  trustee or guardian,  please give your full title as such.  When
signing as a corporation,  partnership or other entity,  please sign in the name
of the entity by an authorized person.

Dated: ________________          ______________________________________________
                                 (Please sign name exactly as it appears hereon)

                                 ______________________________________________
                                 (Signature of joint owner, if any)

                                    PLEASE  MARK,  DATE,  SIGN AND  RETURN  THIS
                                    PROXY IN THE ENCLOSED PROXY RETURN ENVELOPE,
                                    WHICH  REQUIRES  NO POSTAGE IF MAILED IN THE
                                    UNITED   STATES.   IF  AN  ENVELOPE  IS  NOT
                                    ENCLOSED  OR  HAS  BEEN  MISPLACED,   PLEASE
                                    RETURN    THIS     COMPLETED     PROXY    TO
                                    -------------------.



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