CAMBRIDGE HEART INC
S-1/A, 1996-07-16
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
Previous: VERMONT TEDDY BEAR CO INC, 8-K, 1996-07-16
Next: BOSTON CAPITAL TAX CREDIT FUND IV LP, 10-K405, 1996-07-16



<PAGE>
 
     
  AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 16, 1996     
 
                                                     REGISTRATION NO. 333-04879
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                                ---------------
                               
                            AMENDMENT NO. 3 TO     
                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                                ---------------
                             CAMBRIDGE HEART, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                                ---------------
        DELAWARE                     3845                    13-3679946
 (STATE OR OTHER       (PRIMARY STANDARD INDUSTRIAL      (I.R.S. EMPLOYER
 JURISDICTION OF         CLASSIFICATION CODE)             IDENTIFICATION
 INCORPORATION OR                                             NUMBER)
 ORGANIZATION)
                                ---------------
                     1 OAK PARK DRIVE, BEDFORD, MA 01730
                                (617) 271-1200
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                                ---------------
                               JEFFREY M. ARNOLD
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                             CAMBRIDGE HEART, INC.
                               1 OAK PARK DRIVE
                               BEDFORD, MA 01730
                                (617) 271-1200
(NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE,
                             OF AGENT FOR SERVICE)
                                ---------------
                                  COPIES TO:
        JOHN A. BURGESS, ESQ.
        STEVEN D. SINGER, ESQ.                  DAVID J. BEVERIDGE, ESQ.
            HALE AND DORR                         SHEARMAN & STERLING
           60 STATE STREET                        599 LEXINGTON AVENUE
     BOSTON, MASSACHUSETTS 02109                NEW YORK, NEW YORK 10022
            (617) 526-6000                           (212) 848-4000
                                ---------------
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date hereof.
                                ---------------
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, 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, 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(c)
under the Securities Act, check the following box and list the Securities Act
registration number of the earlier effective registration statement for the
same offering. [_]
 
  If delivery of the Prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
 
                                ---------------
 
                        CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                          PROPOSED
                                             PROPOSED      MAXIMUM
 TITLE OF EACH CLASS OF       AMOUNT         MAXIMUM      AGGREGATE   AMOUNT OF
    SECURITIES TO BE          TO BE       OFFERING PRICE  OFFERING   REGISTRATION
       REGISTERED        REGISTERED(1)(3)  PER SHARE(2)   PRICE(2)      FEE(4)
- ---------------------------------------------------------------------------------
<S>                      <C>              <C>            <C>         <C>
Common Stock, $.001 par
 value per share.......  3,682,900 shares     $13.00     $47,877,700   $16,510
</TABLE>
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
(1) Includes 480,375 shares which the Underwriters have the option to purchase
    from the Company to cover over-allotments, if any. See "Underwriting".
(2) Estimated solely for the purpose of calculating the amount of the
    registration fee pursuant to Rule 457(a) under the Securities Act of 1933.
(3) The shares of Common Stock are not being registered for the purpose of
    sale outside the United States.
(4) $15,466 was previously paid by the Registrant on May 31, 1996.
 
                                ---------------
  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 OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO
SECTION 8(A), MAY DETERMINE.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                             CAMBRIDGE HEART, INC.
 
              CROSS REFERENCE SHEET SHOWING LOCATION IN PROSPECTUS
             OF INFORMATION REQUIRED BY ITEMS IN PART I OF FORM S-1
 
<TABLE>
<CAPTION>
         REGISTRATION STATEMENT
            ITEM AND CAPTION                      LOCATION IN PROSPECTUS
         ----------------------                   ----------------------
<S>                                        <C>
 1.Forepart of Registration Statement and
     Outside Front Cover Page of
     Prospectus..........................  Outside Front Cover Page
 2.Inside Front and Outside Back Cover
     Pages of Prospectus.................  Inside Front Cover Page; Outside
                                            Back Cover Page
 3.Summary Information, Risk Factors and
     Ratio of Earnings to Fixed Charges..  Prospectus Summary; Risk Factors;
                                            The Company
 4.Use of Proceeds.......................  Prospectus Summary; Use of Proceeds
 5.Determination of Offering Price.......  Underwriting
 6.Dilution..............................  Dilution
 7.Selling Security Holders..............  Principal and Selling Stockholders
 8.Plan of Distribution..................  Outside Front Cover Page;
                                            Underwriting
 9.Description of Securities to be
     Registered..........................  Description of Capital Stock
10.Interests of Named Experts and
     Counsel.............................  Legal Matters; Experts
11.Information With Respect to the
     Registrant:
  (a)Description of Business.............  Business
  (b)Description of Property.............  Business--Facilities
  (c)Legal Proceedings...................  Not Applicable
  (d)Market Price of and Dividends on the
       Registrant's Common Equity and
       Related Stockholder Matters.......  Front Cover Page; Dividend Policy;
                                            Description of Capital Stock;
                                            Shares Eligible for Future Sale
  (e)Financial Statements................  Financial Statements; Capitalization
  (f)Selected Financial Data.............  Selected Financial Data
  (g)Supplementary Financial
       Information.......................  Not Applicable
  (h)Management's Discussion and Analysis
       of Financial Condition and Results 
       of Operations.....................  Management's Discussion and Analysis
                                            of Financial Condition and Results 
                                            of Operations                       
  (i)Changes in and Disagreements with
       Accountants on Accounting and
       Financial Disclosure..............  Not Applicable
  (j)Directors, Executive Officers,
       Promoters and Control Persons.....  Management--Executive Officers and
                                            Directors; Certain Transactions
  (k)Executive Compensation..............  Management--Executive Compensation
  (l)Security Ownership of Certain
       Beneficial Owners and Management..  Principal Stockholders
  (m)Certain Relationships and Related
       Transactions......................  Certain Transactions
12.Disclosure of Commission Position on
     Indemnification for Securities Act
     Liabilities.........................  Not Applicable
</TABLE>
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
  The following table sets forth the various expenses in connection with the
sale and distribution of the securities being registered, other than the
underwriting discounts. All amounts shown are estimates except for the
Securities and Exchange Commission ("SEC") registration fee and the National
Association of Securities Dealers, Inc. ("NASD") filing fee.
 
<TABLE>
     <S>                                                               <C>
     SEC Registration Fee............................................. $ 15,500
     NASD Filing Fee..................................................    4,535
     Nasdaq Listing Fee...............................................   40,000
     Blue Sky Fees and Expenses.......................................   25,000
     Transfer Agent and Registrar Fees................................   10,000
     Accounting Fees and Expenses.....................................  150,000
     Legal Fees and Expenses..........................................  200,000
     Printing, Engraving and Mailing Expenses.........................  100,000
     Miscellaneous....................................................   79,965
                                                                       --------
       Total.......................................................... $625,000
                                                                       ========
</TABLE>
- --------
* To be completed by amendment
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
  Article Nine of the Registrant's Restated Certificate of Incorporation (the
"Restated Certificate of Incorporation") provides that no director of the
Registrant shall be personally liable for any monetary damages for any breach
of fiduciary duty as a director, except to the extent that the Delaware
General Corporation Law prohibits the elimination or limitation of liability
of directors for breach of fiduciary duty.
 
  Article Nine of the Registrant's Restated Certificate of Incorporation
provides that a director or officer of the Registrant (a) shall be indemnified
by the Registrant against all expenses (including attorneys' fees), judgments,
fines and amounts paid in settlement incurred in connection with any
litigation or other legal proceeding (other than an action by or in the right
of the Registrant) brought against him by virtue of his position as a director
or officer of the Registrant if he acted in good faith and in a manner he
reasonably believed to be in, or not opposed to, the best interests of the
Registrant, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his conduct was unlawful and (b) shall be
indemnified by the Registrant against all expenses (including attorneys' fees)
and amounts paid in settlement incurred in connection with any action by or in
the right of the Registrant brought against him by virtue of his position as a
director or officer of the Registrant if he acted in good faith and in a
manner he reasonably believed to be in, or not opposed to, the best interests
of the Registrant, except that no indemnification shall be made with respect
to any matter as to which such person shall have been adjudged to be liable to
the Registrant, unless a court determines that, despite such adjudication but
in view of all of the circumstances, he is entitled to indemnification of such
expenses. Notwithstanding the foregoing, to the extent that a director or
officer has been successful, on the merits or otherwise, including, without
limitation, the dismissal of an action without prejudice, he is required to be
indemnified by the Registrant against all expenses (including attorneys' fees)
incurred in connection therewith. Expenses shall be advanced to a director or
officer at his request, provided that he undertakes to repay the amount
advanced if it is ultimately determined that he is not entitled to
indemnification for such expenses.
 
                                     II-1
<PAGE>
 
  Indemnification is required to be made unless the Registrant determines that
the applicable standard of conduct required for indemnification has not been
met. In the event of a determination by the Registrant that the director or
officer did not meet the applicable standard of conduct required for
indemnification, or if the Registrant fails to make an indemnification payment
within 60 days after such payment is claimed by such person, such person is
permitted to petition the court to make an independent determination as to
whether such person is entitled to indemnification. As a condition precedent to
the right of indemnification, the director or officer must give the Registrant
notice of the action for which indemnity is sought and the Registrant has the
right to participate in such action or assume the defense thereof.
 
  Section 145 of the Delaware General Corporation Law provides that a
corporation has the power to indemnify a director, officer, employee or agent
of the corporation and certain other persons serving at the request of the
corporation in related capacities against amounts paid and expenses incurred in
connection with an action or proceeding to which he is or is threatened to be
made a party by reason of such position, if such person shall have acted in
good faith and in a manner he reasonably believed to be in or not opposed to
the best interests of the corporation, and, in any criminal proceeding, if such
person had no reasonable cause to believe his conduct was unlawful; provided
that, in the case of actions brought by or in the right of the corporation, no
indemnification shall be made with respect to any matter as to which such
person shall have been adjudged to be liable to the corporation unless and only
to the extent that the adjudicating court determines that such indemnification
is proper under the circumstances.
 
  Under Section Eight of the Underwriting Agreement, the Underwriters are
obligated, under certain circumstances, to indemnify directors and officers of
the Registrant against certain liabilities, including liabilities under the
Securities Act of 1933, as amended (the "Securities Act").
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
  Set forth in chronological order below is information regarding the number of
shares of Common and Preferred Stock issued, and the number of options granted,
by the Registrant since May 1, 1993. Further included is the consideration, if
any, received by the Registrant for such shares and options, and information
relating to the section of the Securities Act of 1933 (the "Securities Act"),
or rule of the Securities and Exchange Commission under which exemption from
registration was claimed. All awards of options did not involve any sale under
the Securities Act and none of these securities was registered under the
Securities Act.
 
    1. In September 1993, the Registrant sold 1,200,000 and 1,300,000 shares
  of Series A Convertible Preferred Stock to Financial Strategic Portfolios,
  Inc. - Health Sciences Portfolio and the Global Health Sciences Fund,
  respectively, at $1.00 per share for aggregate consideration of $2,500,000.
 
    2. In September 1993, October 1993 and December 1993, the Registrant sold
  3,533,083, 372,500 and 72,500 shares of Series A Convertible Preferred
  Stock, respectively, to certain individual investors at $1.00 per share,
  for a total aggregate consideration of $3,978,083.
 
    3. In September 1993, the Registrant converted $100,000 of notes payable
  due to individual investors into 100,000 shares of Series A Convertible
  Preferred Stock.
 
    4. In September 1993, the Registrant issued warrants to purchase 328,904
  shares of Common Stock to KBL Healthcare, Inc. in exchange for certain
  investment banking services. The warrant is exercisable at $2.00 per share.
 
    5. In December 1993, the Registrant issued a warrant to purchase 109,634
  shares of Common Stock to Dr. Richard Cohen in exchange for certain
  consulting services to the Company. The warrant is exercisable at $2.00 per
  share.
 
    6. In December 1993, the Registrant sold 180,000 shares of Common Stock
  to the Massachusetts Institute of Technology pursuant to a certain Option
  Agreement dated as of February 10, 1993 at $.002 per share for an aggregate
  consideration of $360.
 
                                      II-2
<PAGE>
 
    7. In August 1994, the Registrant sold 22,500 shares of Common Stock to
  Paul Albrecht pursuant to the exercise of options at $.002 per share for
  aggregate consideration of $45.
 
    8. In October 1994, the Registrant sold 8,333 shares of Common Stock to a
  member of the Scientific Advisory Board pursuant to the exercise of options
  at $.02 per share for an aggregate consideration of $167.
 
    9. In March 1995, the Registrant sold 91,163 shares of Common Stock to
  Jeffrey M. Arnold pursuant to the exercise of options at $.02 per share for
  aggregate consideration of $1,823.
 
    10. In March 1995, the Registrant sold 8,333 shares of Common Stock to
  David F. Rollo pursuant to the exercise of options at $.02 per share for an
  aggregate consideration of $167.
 
    11. In April 1995, the Registrant sold 8,334 shares of Common Stock to a
  member of the Scientific Advisory Board pursuant to the exercise of options
  at $.02 per share for an aggregate consideration of $167.
 
    12. In April 1995, the Registrant sold 2,333,333 shares of Series B
  Convertible Preferred Stock to certain investment partnerships organized by
  Morgan Stanley & Co. at $1.50 per share for aggregate consideration of
  $3,500,000.
 
    13. In June 1995, the Registrant sold 2,000 shares of Common Stock to an
  employee pursuant to the exercise of options at $.20 per share for
  aggregate consideration of $400.
 
    14. In June 1995, the Registrant sold 22,500 shares of Common Stock to
  Paul Albrecht pursuant to the exercise of options at $.002 per share for
  aggregate consideration of $45.
 
    15. In March 1996, the Registrant sold 45,000 shares of Common Stock to
  Paul Albrecht pursuant to the exercise of options at $.20 per share for
  aggregate consideration of $9,000.
 
    16. From May 15, 1993 through June 30, 1996, the Registrant granted
  options to purchase an aggregate of 967,000 shares of Common Stock to
  officers, employees and consultants of the Registrant pursuant to the
  Registrant's Amended and Restated 1993 incentive and Non-Qualified Stock
  Option Plan. Exercise prices range from $0.002 to $10.00 per share,
  resulting in an aggregate consideration of approximately $987,350.
 
  The shares of capital stock and securities issued in the above transactions
were offered and sold in reliance upon the exemption from registration under
Section 4(2) of the Securities Act or Regulation D or Rule 701 promulgated
under the Securities Act, relative to sales by an issuer not involving a
public offering.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
  (A) EXHIBITS
 
<TABLE>   
<CAPTION>
 EXHIBIT
   NO.                                DESCRIPTION
 -------                              -----------
 <C>     <S>
   1.1#  Form of U.S. Underwriting Agreement.
   1.2#  Form of International Underwriting Agreement.
   3.1   Certificate of Incorporation, as amended, of the Registrant.
   3.2   Form of Restated Certificate of Incorporation of the Registrant to be
         filed upon the closing of the public offering.
   3.3   By-Laws of the Registrant, as amended.
   4.1#  Specimen Certificate for shares of Common Stock, $.001 par value, of
         the Registrant.
   5.1*  Opinion of Hale and Dorr with respect to the validity of the
         securities being offered.
  10.1   1993 Incentive and Non-Qualified Stock Option Plan, as amended.
  10.2   1996 Equity Incentive Plan.
  10.3   1996 Employee Stock Purchase Plan.
</TABLE>    
 
                                     II-3
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
   NO.                                 DESCRIPTION
 -------                               -----------
 <C>     <S>
 10.4    1996 Director Option Plan.
 10.5    Consulting and Technology Agreement between the Registrant and Dr.
         Richard J. Cohen, dated February 8, 1993.
 10.6    Employment Agreement between the Registrant and Jeffrey M. Arnold,
         dated September 1, 1993.
 10.7    Employment Agreement between the Registrant and Paul Albrecht, Ph.D.,
         dated April 27, 1993.
 10.8    License Agreement By and Between the Registrant and Dr. Richard J.
         Cohen, dated February 8, 1993.
 10.9    Lease By and Between the Registrant and R.W. Connelly, dated June 1,
         1995.
 10.10+  Exclusive distribution agreement by and between the Registrant and
         Kontron Instruments Ltd., dated December 28, 1995.
 10.11+  Exclusive Distributorship Agreement by and between the Registrant and
         Fukuda Denshi Co., Ltd.
 10.12   License Agreement by and between the Registrant and the Massachusetts
         Institute of Technology, dated September 28, 1993, relating to the
         technology of "Assessing Myocardial Electrical Stability".
 10.13   License Agreement by and between the Registrants and the Massachusetts
         Institute of Technology, dated September 28, 1993, relating to the
         technology of "Cardiac Electrical Imaging".
 10.14   License Agreement by and between the Registrant and the Massachusetts
         Institute of Technology, dated September 28, 1993, relating to the
         technology of "Pacing Technology For Prevention of Cardiac
         Dysrhythmias".
 10.15   License Agreement by and between the Registrant and the Massachusetts
         Institute of Technology, dated September 28, 1993, relating to the
         technology of "Cardiovascular System Identification", as amended on
         July 9, 1996.
 10.16   Investors' Rights Agreement by and among the Company, Financial
         Strategic Portfolios, Inc.--Health Sciences Portfolio and the Global
         Health Sciences Fund, dated September 29, 1993.
 10.17   Investors' Rights Agreement by and among the Company and Morgan
         Stanley Venture Capital Fund II, L.P., Morgan Stanley Venture Capital
         Fund II, C.V. and Morgan Stanley Venture Investors, L.P., dated April
         19, 1995.
 10.18   Warrant to Purchase Shares of common Stock of the Company in favor of
         Richard J. Cohen, dated September 29, 1993.
 10.19   Form of additional warrant to purchase shares of Common Stock of the
         Company.
 10.20   Form of Registration Rights Agreement by and between the Company and
         various Founders, each dated March 29, 1993.
 11      Computation of Unaudited Pro Forma Net Loss Per Share.
 23.1    Consent of Hale and Dorr (included in Exhibit 5).
 23.2    Consent of Price Waterhouse LLP.
 24      Powers of Attorney (included on page II-6).
 27      Financial Data Schedule
 99.1    Consent of Laurence J. Blumberg
</TABLE>    
- --------
* To be filed by amendment.
# Filed herewith.
+ Confidential treatment requested as to certain portions.
All other exhibits have been previously filed.
 
  (B) FINANCIAL STATEMENT SCHEDULES
 
  All applicable information is readily determinable from the notes to the
Company's financial statements.
 
                                     II-4
<PAGE>
 
ITEM 17. UNDERTAKINGS
 
  Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions contained in the Restated Certificate of
Incorporation and Amended and Restated By-Laws of the Registrant and the laws
of the State of Delaware, 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.
 
  The undersigned Registrant hereby undertakes to provide to the Underwriters
at the closing specified in the Underwriting Agreement certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.
 
  The undersigned Registrant hereby undertakes that:
 
    (1) For purposes of determining any liability under the Securities Act,
  the information omitted from the form of prospectus filed as part of this
  Registration Statement in reliance upon Rule 430A and contained in a form
  of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
  497(h) under the Securities Act shall be deemed to be part of this
  Registration Statement as of the time it was declared effective.
 
    (2) For the purpose of determining any liability under the Securities
  Act, each post-effective amendment that contains a form of prospectus 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.
 
                                      II-5
<PAGE>
 
                                  SIGNATURES
   
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT, THE REGISTRANT HAS DULY
CAUSED THIS AMENDMENT NO. 3 TO ITS REGISTRATION STATEMENT TO BE SIGNED ON ITS
BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE TOWN OF BEDFORD,
COMMONWEALTH OF MASSACHUSETTS, ON THIS 16TH DAY OF JULY, 1996.     
 
                                          CAMBRIDGE HEART, INC.
 
                                                  /S/ Jeffrey M. Arnold*
                                          By: _________________________________
                                              JEFFREY M. ARNOLDPRESIDENT AND
                                                  CHIEF EXECUTIVE OFFICER
 
                       POWER OF ATTORNEY AND SIGNATURES
 
  We, the undersigned officers and directors of Cambridge Heart, Inc., hereby
severally constitute and appoint Jeffrey M. Arnold, Thomas V. Hennessey, Jr.,
John A. Burgess and Steven D. Singer, and each of them singly, our true and
lawful attorneys with full power to them, and each of them singly, to sign for
us and in our names in the capacities indicated below, the Registration
Statement on Form S-1 filed herewith and any and all pre-effective and post-
effective amendments to said Registration Statement and any subsequent
Registration Statement for the same offering which may be filed under Rule
462(b), and generally to do all such things in our names and on our behalf in
our capacities as officers and directors to enable Cambridge Heart, Inc. to
comply with the provisions of the Securities Act, as amended, and all
requirements of the Securities and Exchange Commission, hereby ratifying and
confirming our signatures as they may be signed by our said attorneys, or any
of them, to said Registration Statement and any and all amendments thereto.
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT, THIS REGISTRATION
STATEMENT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS IN THE CAPACITIES AND
ON THE DATES INDICATED.
 
              SIGNATURE                        TITLE                 DATE
 
       /S/ Jeffrey M. Arnold*          President, Chief            
- -------------------------------------   Executive Officer       July 16, 1996
          JEFFREY M. ARNOLD             and Director                     
                                        (Principal
                                        Executive Officer)
 
    /S/ Thomas V. Hennessey, Jr.       Chief Financial             
- -------------------------------------   Officer, Vice           July 16, 1996
      THOMAS V. HENNESSEY, JR.          President of                     
                                        Operations and
                                        Treasurer
                                        (Principal
                                        Financial and
                                        Accounting Officer)
 
                                     II-6
<PAGE>
 
              SIGNATURE                         TITLE                DATE
 
         /S/ Marlene Krauss*            Chairperson,               
- -------------------------------------    Secretary and          July 16, 1996
           MARLENE KRAUSS                Director                        
 
        /S/ Zachary C. Berk*            Director                   
- -------------------------------------                           July 16, 1996
           ZACHARY C. BERK                                               
 
        /S/ Richard J. Cohen*           Director                   
- -------------------------------------                           July 16, 1996
          RICHARD J. COHEN                                               
 
        /S/ M. Fazle Husain*            Director                   
- -------------------------------------                           July 16, 1996
           M. FAZLE HUSAIN                                               
 
        /S/ David F. Muller*            Director                   
- -------------------------------------                           July 16, 1996
           DAVID F. MULLER                                               
 
         /S/ David F. Rollo*            Director                   
- -------------------------------------                           July 16, 1996
           DAVID F. ROLLO                                                
 
         /S/ Rolf S. Stutz*             Director                   
- -------------------------------------                           July 16, 1996
            ROLF S. STUTZ                                                
 
*By:  /S/ Thomas V. Hennessey, Jr.                                 
    ---------------------------------                           July 16, 1996
       THOMAS V. HENNESSEY, JR.                                           
          Attorney-in-fact              

 
                                      II-7
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>   
<CAPTION>
 EXHIBIT
   NO.                             DESCRIPTION                             PAGE
 -------                           -----------                             ----
 <C>     <S>                                                               <C>
   1.1#  Form of U.S. Underwriting Agreement.
   1.2#  Form of International Underwriting Agreement.
   3.1   Certificate of Incorporation, as amended, of the Registrant.
   3.2   Form of Restated Certificate of Incorporation of the Registrant
         to be filed upon the closing of the public offering.
   3.3   By-Laws of the Registrant, as amended.
   4.1#  Specimen Certificate for shares of Common Stock, $.001 par
         value, of the Registrant.
   5.1*  Opinion of Hale and Dorr with respect to the validity of the
         securities being offered.
  10.1   1993 Incentive and Non-Qualified Stock Option Plan, as amended.
  10.2   1996 Equity Incentive Plan.
  10.3   1996 Employee Stock Purchase Plan.
  10.4   1996 Director Stock Option Plan.
  10.5   Consulting and Technology Agreement between the Registrant and
         Dr. Richard J. Cohen, dated February 8, 1993.
  10.6   Employment Agreement between the Registrant and Jeffrey M.
         Arnold, dated September 1, 1993.
  10.7   Employment Agreement between the Registrant and Paul Albrecht,
         Ph.D., dated April 27, 1993.
  10.8   License Agreement By and Between the Registrant and Dr. Richard
         J. Cohen, dated February 8, 1993.
  10.9   Lease By and Between the Registrant and R.W. Connelly, dated
         June 1, 1995.
  10.10+ Exclusive distribution agreement by and between the Registrant
         and Kontron Instruments Ltd., dated December 28, 1995.
  10.11+ Exclusive Distributorship Agreement by and between the
         Registrant and Fukuda Denshi Co., Ltd.
  10.12  License Agreement by and between the Registrant and the
         Massachusetts Institute of Technology, dated September 28,
         1993, relating to the technology of "Assessing Myocardial
         Electrical Stability".
  10.13  License Agreement by and between the Registrants and the
         Massachusetts Institute of Technology, dated September 28,
         1993, relating to the technology of "Cardiac Electrical
         Imaging".
  10.14  License Agreement by and between the Registrant and the
         Massachusetts Institute of Technology, dated September 28,
         1993, relating to the technology of "Pacing Technology For
         Prevention of Cardiac Dysrhythmias".
  10.15  License Agreement by and between the Registrant and the
         Massachusetts Institute of Technology, dated September 28,
         1993, relating to the technology of "Cardiovascular System
         Identification", as amended on July 9, 1996.
  10.16  Investors' Rights Agreement by and among the Company, Financial
         Strategic Portfolios, Inc.--Health Sciences Portfolio and the
         Global Health Sciences Fund, dated September 29, 1993.
</TABLE>    
<PAGE>
 
<TABLE>   
<CAPTION>
 EXHIBIT
   NO.                             DESCRIPTION                             PAGE
 -------                           -----------                             ----
 <C>     <S>                                                               <C>
  10.17  Investors' Rights Agreement by and among the Company and Morgan
         Stanley Venture Capital Fund II, L.P., Morgan Stanley Venture
         Capital Fund II, C.V. and Morgan Stanley Venture Investors,
         L.P., dated April 19, 1995.
  10.18  Warrant to Purchase Shares of common Stock of the Company in
         favor of Richard J. Cohen, dated September 29, 1993.
  10.19  Form of additional warrant to purchase shares of Common Stock
         of the Company.
  10.20  Form of Registration Rights Agreement by and between the
         Company and various Founders, each dated March 29, 1993.
  11     Computation of Unaudited Pro Forma Net Loss Per Share.
  23.1   Consent of Hale and Dorr (included in Exhibit 5).
  23.2   Consent of Price Waterhouse LLP.
  24     Powers of Attorney (included on page II-6).
  27     Financial Data Schedule.
  99.1   Consent of Laurence J. Blumberg.
</TABLE>    
- --------
* To be filed by amendment.
# Filed herewith.
+ Confidential treatment requested as to certain portions.
All other exhibits have been previously filed.

<PAGE>
 
                                                                     Exhibit 1.1

                             CAMBRIDGE HEART, INC.
                                  COMMON STOCK
                          (PAR VALUE $.001 PER SHARE)

                             UNDERWRITING AGREEMENT
                                 (U.S. VERSION)



                                                                          , 1996
Goldman, Sachs & Co.,
Bear, Stearns & Co. Inc.,
 As representatives of the several Underwriters
 named in Schedule I hereto,
c/o Goldman, Sachs & Co.,
85 Broad Street
New York, New York  10004


Ladies and Gentlemen:

     Cambridge Heart, Inc., a Delaware corporation, (the "Company"), proposes,
subject to the terms and conditions stated herein, to issue and sell to the
Underwriters named in Schedule I hereto (the "Underwriters") an aggregate of
2,400,000 shares and, at the election of the Underwriters, up to 390,375
additional shares of the Common Stock, par value $.001 per share ("Stock"), of
the Company, and the Stockholders of the Company named in Schedule II hereto
(the "Selling Stockholders") propose, subject to the terms and conditions stated
herein, to sell to the Underwriters an aggregate of 202,525 shares of Stock.
The aggregate of 2,602,525 shares to be sold by the Company and the Selling
Stockholders is herein called the "Firm Shares" and the 390,375 additional
shares to be sold by the Company are herein called the "Optional Shares".  The
Firm Shares and the Optional Shares that the Underwriters elect to purchase
pursuant to Section 2 hereof are herein collectively called the "Shares".

     It is understood and agreed to by all parties that the Company is
concurrently entering into an agreement (the "International Underwriting
Agreement") providing for the sale by the Company of up to a total of 690,000
shares of Stock (the "International Shares"), including the overallotment option
thereunder, through arrangements with certain underwriters outside the United
States (the "International Underwriters"), for whom Goldman Sachs International
and Bear, Stearns International Limited are acting as lead managers.  Anything
herein or therein to the contrary notwithstanding, the respective closings under
this Agreement and the International Underwriting Agreement are hereby expressly
made conditional on one another.  The Underwriters hereunder and the
International Underwriters are simultaneously entering into an Agreement between
U.S. and International Underwriting Syndicates (the "Agreement between
Syndicates") which provides, among other things, for the transfer of shares of
Stock between the two syndicates.  Two forms of prospectus are to be used in
connection with the offering and sale of shares of Stock contemplated by the
foregoing, one relating to the Shares hereunder and the other relating to the
<PAGE>
 
International Shares.  The latter form of prospectus will be identical to the
former except for certain substitute pages. Except as used in Sections 2, 3, 4,
9 and 11 herein, and except as the context may otherwise require, references
hereinafter to the Shares shall include all the shares of Stock which may be
sold pursuant to either this Agreement or the International Underwriting
Agreement, and references herein to any prospectus whether in preliminary or
final form, and whether as amended or supplemented, shall include both the U.S.
and the international versions thereof.

     1.  (a)  The Company represents and warrants to, and agrees with, each of
the Underwriters that:

     (i) A registration statement on Form S-1 (File No. 333-04879) (as amended
     prior to effectiveness, the "Initial Registration Statement") in respect of
     the Shares has been filed with the Securities and Exchange Commission (the
     "Commission"); the Initial Registration Statement and any post-effective
     amendment thereto, each in the form heretofore delivered to you, and,
     excluding exhibits thereto, to you for each of the other Underwriters, have
     been declared effective by the Commission in such form; other than a
     registration statement, if any, increasing the size of the offering (a
     "Rule 462(b) Registration Statement"), filed pursuant to Rule 462(b) under
     the Securities Act of 1933, as amended (the "Act"), which became effective
     upon filing, no other document with respect to the Initial Registration
     Statement has heretofore been filed with the Commission; and no stop order
     suspending the effectiveness of the Initial Registration Statement, any
     post-effective amendment thereto or the Rule 462(b) Registration Statement,
     if any, has been issued and no proceeding for that purpose has been
     initiated or threatened by the Commission (any preliminary prospectus
     included in the Initial Registration Statement or filed with the Commission
     pursuant to Rule 424(a) of the rules and regulations of the Commission
     under the Act is hereinafter called a "Preliminary Prospectus"); the
     various parts of the Initial Registration Statement, including all exhibits
     thereto and including the information contained in the form of final
     prospectus filed with the Commission pursuant to Rule 424(b) under the Act
     in accordance with Section 5(a) hereof and deemed by virtue of Rule 430A
     under the Act to be part of the Initial Registration Statement at the time
     it was declared effective or such part of the Rule 462(b) Registration
     Statement, if any, became or hereafter becomes effective, each as amended
     at the time such part of the registration statement became effective, are
     hereinafter collectively called the "Registration Statement"; and such
     final prospectus, in the form first filed pursuant to Rule 424(b) under the
     Act, is hereinafter called the "Prospectus";

     (ii) No order preventing or suspending the use of any Preliminary
     Prospectus has been issued by the Commission, and each Preliminary
     Prospectus, at the time of filing thereof, conformed in all material
     respects to the requirements of the Act and the rules and regulations of
     the Commission thereunder, and did not contain an untrue statement of a
     material fact or omit to state a material fact required to be stated
     therein or necessary to make the statements therein, in the light of the
     circumstances under which they were made, not misleading; provided,
     however, that this representation and warranty shall not apply to any
     statements or omissions made in reliance upon and in conformity with
     information furnished in writing to the Company by an Underwriter through
     

                                     

                                       2
<PAGE>
 
     Goldman, Sachs & Co. expressly for use therein or by a Selling Stockholder
     expressly for use in the preparation of the answers therein to Items 7 and
     11(l) of Form S-1;

     (iii)  The Registration Statement conforms, and the Prospectus and any
     further amendments or supplements to the Registration Statement or the
     Prospectus will conform, in all material respects, to the requirements of
     the Act and the rules and regulations of the Commission thereunder and do
     not and will not, on the applicable effective date of the Registration
     Statement and any amendment thereto and as of the applicable filing date as
     to the Prospectus and any amendment or supplement thereto, contain an
     untrue statement of a material fact or omit to state a material fact
     required to be stated therein or necessary to make the statements therein
     not misleading; provided, however, that this representation and warranty
     shall not apply to any statements or omissions made in reliance upon and in
     conformity with information furnished in writing to the Company by an
     Underwriter through you expressly for use therein or by a Selling
     Stockholder expressly for use in the preparation of the answers therein to
     Items 7 and 11(l) of Form S-1;

     (iv) The Company has not sustained since the date of the latest audited
     financial statements included in the Prospectus any material loss or
     interference with its business from fire, explosion, flood or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     court or governmental action, order or decree, otherwise than as set forth
     or contemplated in the Prospectus; and, since the respective dates as of
     which information is given in the Registration Statement and the
     Prospectus, there has not been any change in the capital stock or long-term
     debt (including obligations under capital leases) of the Company or any
     material adverse change, or any development involving a prospective
     material adverse change, in or affecting the general affairs, management,
     financial position, stockholders' equity or results of operations of the
     Company, otherwise than as set forth or contemplated in the Prospectus;

     (v) The Company does not own any real property; the Company has good and
     marketable title to all personal property owned by it, free and clear of
     all liens, encumbrances and defects except such as are described in the
     Prospectus or such as do not materially affect the value of such property
     and do not interfere with the use made and proposed to be made of such
     property by the Company; and any real property and buildings held under
     lease by the Company are held by it under valid, subsisting and enforceable
     leases with such exceptions as are not material and do not interfere with
     the use made and proposed to be made of such property and buildings by the
     Company;

     (vi) The Company has been duly incorporated and is validly existing as a
     corporation in good standing under the laws of the State of Delaware, with
     power and authority (corporate and other) to own its properties and conduct
     its business as described in the Prospectus, and has been duly qualified as
     a foreign corporation for the transaction of business and is in good
     standing under the laws of each other jurisdiction in which it owns or
     leases properties or conducts any business so as to require such
     qualification, except where the failure to be so qualified would not have,
     individually or in the aggregate, a material adverse effect on the current
     or future financial position, stockholders' equity or results of operations
     of the Company (a "Material Adverse Effect");



                                       3
<PAGE>
 
     (vii)  The Company has an authorized capitalization as set forth in the
     Prospectus, all of the issued shares of capital stock of the Company have
     been duly and validly authorized and issued, are fully paid and non-
     assessable and conform to the description of the Stock contained in the
     Prospectus; and the Company has no subsidiaries;

     (viii)  The Shares to be issued and sold by the Company to the Underwriters
     hereunder and under the International Underwriting Agreement have been duly
     and validly authorized and, when issued and delivered against payment
     therefor as provided herein and in the International Underwriting
     Agreement, will be duly and validly issued and fully paid and non-
     assessable and will conform to the description of the Stock contained in
     the Prospectus;

     (ix) The issue and sale of the Shares to be sold by the Company hereunder
     and under the International Underwriting Agreement and the compliance by
     the Company with all of the provisions of this Agreement and the
     International Underwriting Agreement and the consummation of the
     transactions herein and therein contemplated will not conflict with or
     result in a breach or violation of any of the terms or provisions of, or
     constitute a default under, any indenture, mortgage, deed of trust, loan
     agreement or other agreement or instrument to which the Company is a party
     or by which the Company is bound or to which any of the property or assets
     of the Company is subject, nor will such action result in any violation of
     the provisions of the Restated Certificate of Incorporation (the
     "Certificate of Incorporation") or By-laws, as amended (the "By-laws"), of
     the Company or any statute or any order, rule or regulation of any court or
     governmental agency or body having jurisdiction over the Company or any of
     its properties; and no consent, approval, authorization, order,
     registration or qualification of or with any such court or governmental
     agency or body is required for the issue and sale of the Shares or the
     consummation by the Company of the transactions contemplated by this
     Agreement and the International Underwriting Agreement, except the
     registration under the Act of the Shares and such consents, approvals,
     authorizations, registrations or qualifications as may be required under
     state or foreign securities or Blue Sky laws in connection with the
     purchase and distribution of the Shares by the Underwriters and the
     International Underwriters or under the rules of the National Association
     of Securities Dealers, Inc.;

     (x) The Company is not in violation of its Certificate of Incorporation or
     By-laws or in default in the performance or observance of any material
     obligation, agreement, covenant or condition contained in any indenture,
     mortgage, deed of trust, loan agreement, lease or other agreement or
     instrument to which it is a party or by which it or any of its properties
     may be bound;

     (xi) Each of the License Agreement by and between the Company and the
     Massachusetts Institute of Technology ("MIT"), dated September 28, 1993,
     relating to the technology of "Assessing Myocardial Electrical Stability",
     the License Agreement by and between the Company and MIT, dated September
     28, 1993, relating to the technology of "Cardiac Electrical Imaging",  the
     License Agreement by and between the Company and MIT, dated September 28,
     1993, relating to the technology of "Pacing Technology For Prevention of
     Cardiac Dysrhythmias" and the License Agreement by and between the Company




                                       4
<PAGE>
 
     and MIT, dated September 28, 1993, relating to the technology of
     "Cardiovascular Identification" (collectively, the "MIT License
     Agreements") is in full force and effect and constitutes a valid and
     binding agreement between the parties thereto, enforceable in accordance
     with its terms, subject as to enforcement to bankruptcy, insolvency,
     reorganization and other laws of general applicability relating to or
     affecting creditors' rights and to general equity principles, and there has
     not occurred any default under any MIT License Agreement or any event that
     with the giving of notice or lapse of time would constitute a default
     thereunder;

     (xii)  The statements set forth in the Prospectus under the caption
     "Description of Capital Stock", insofar as they purport to constitute a
     summary of the terms of the Stock and under the caption "Underwriting",
     insofar as they purport to describe the provisions of the laws and
     documents referred to therein, are accurate, complete and fair summaries of
     such terms and provisions in all material respects;

     (xiii)  Other than as set forth or contemplated in the Prospectus, there
     are no legal or governmental proceedings pending to which the Company is a
     party or of which any property of the Company is the subject which, if
     determined adversely to the Company, would individually or in the aggregate
     have a Material Adverse Effect; and, to the best of the Company's
     knowledge, no such proceedings are threatened or contemplated by
     governmental authorities or threatened by others;

     (xiv)  The Company is conducting business in compliance with all applicable
     statutes, rules, regulations and orders administered or issued by any
     governmental or regulatory authority in the jurisdictions in which it is
     conducting business, including without limitation the United States Food
     and Drug Administration, except where the failure to be so in compliance
     would not have, individually or in the aggregate, a Material Adverse
     Effect;

     (xv) Except as disclosed in the Prospectus, the Company is not in violation
     of any statute, or any rule, regulation, decision or order of any
     governmental agency or body or any court relating to the use, disposal or
     release of hazardous or toxic substances or relating to the protection or
     restoration of the environment or human exposure to hazardous or toxic
     substances (collectively, "environmental laws"), does not own or operate
     any real property contaminated with any substance that is subject to any
     environmental laws, is not liable for any off-site disposal or
     contamination pursuant to any environmental laws, and is not subject to any
     claim relating to any environmental laws, which violation, contamination,
     liability or claim would have, individually or in the aggregate, a Material
     Adverse Effect; and the Company is not aware of any pending investigation
     which could reasonably be expected to lead to such a claim;

     (xvi)  Except as disclosed in the Prospectus, the Company owns or possesses
     valid, binding, enforceable licenses or other rights to use any patents,
     patent licenses, trademarks, service marks, trade names, service names,
     copyrights, mask works, technology, know-how and other proprietary
     intellectual property rights ("Intellectual Property") necessary to conduct
     the business now or proposed to be conducted by it as described in the
     Prospectus and the Company has not received any notice of infringement of
     or conflict with (and knows of no such infringement of or conflict with)




                                       5
<PAGE>
 
     asserted rights of others with respect to any patents, trademarks, service
     marks, trade names, copyrights, mask works, technology or know-how which
     could result in any Material Adverse Effect; the Company or its assignor
     has duly and properly filed with the U.S. Patent and Trademark Office the
     pending patent applications referred to in the Prospectus (the "Patent
     Applications"); the information contained in the Registration Statement and
     Prospectus concerning the Patent Applications and patents licensed to the
     Company is accurate in all material respects; and the Company's
     discoveries, inventions, products or processes owned or licensed by the
     Company referred to in the Prospectus do not, to the knowledge of the
     Company, infringe or conflict and the Company has not received any notice
     that its Intellectual Property or activities infringe or conflict with any
     right or patent, or any discovery, invention, product or process which is
     the subject of a patent application known to the Company, which
     infringement or conflict could result in any Material Adverse Effect;

     (xvii)  The Company is not and, after giving effect to the offering and
     sale of the Shares, will not be an "investment company" or an entity
     "controlled" by an "investment company", as such terms are defined in the
     Investment Company Act of 1940, as amended (the "Investment Company Act");

     (xviii)  Neither the Company nor any of its affiliates does business with
     the government of Cuba or with any person or affiliate located in Cuba
     within the meaning of Section 517.075, Florida Statutes;

     (xix)  Price Waterhouse LLP, who have certified certain financial
     statements of the Company, are independent public accountants as required
     by the Act and the rules and regulations of the Commission thereunder; and

     (xx) The Company holds all material licenses, certificates and permits from
     state, federal and other regulatory authorities which are necessary for the
     conduct of its business, except where the failure to hold any such license,
     certificate, or permit would not have, individually or in the aggregate, a
     Material Adverse Effect.

     (b) Each of the Selling Stockholders severally represents and warrants to,
     and agrees with, each of the Underwriters and the Company that:

     (i) All consents, approvals, authorizations and orders necessary for the
     execution and delivery by such Selling Stockholder of this Agreement, the
     Power of Attorney and the Custody Agreement hereinafter referred to, and
     for the sale and delivery of the Firm Shares to be sold by such Selling
     Stockholder hereunder, have been obtained; and such Selling Stockholder has
     full right, power and authority to enter into this Agreement, and the Power
     of Attorney and the Custody Agreement and to sell, assign, transfer and
     deliver the Firm Shares to be sold by such Selling Stockholder hereunder;

     (ii) The sale of the Firm Shares to be sold by such Selling Stockholder
     hereunder the compliance by such Selling Stockholder with all of the
     provisions of this Agreement and the Power of Attorney and the Custody
     Agreement and the consummation of the transactions herein and therein
     




                                       6
<PAGE>
 
     contemplated will not conflict with or result in a breach or violation of
     any of the terms or provisions of, or constitute a default under, any
     statute, indenture, mortgage, deed of trust, loan agreement or other
     agreement or instrument to which such Selling Stockholder is a party or by
     which such Selling Stockholder is bound, or to which any of the property or
     assets of such Selling Stockholder is subject, nor will such action result
     in any violation of the provisions of the Certificate of Incorporation or
     By-laws of such Selling Stockholder if such Selling Stockholder is a
     corporation, the Partnership Agreement of such Selling Stockholder if such
     Selling Stockholder is a partnership or any statute or any order, rule or
     regulation of any court or governmental agency or body having jurisdiction
     over such Selling Stockholder or the property of such Selling Stockholder;

     (iii)  Such Selling Stockholder has, and immediately prior to each Time of
     Delivery (as defined in Section 4 hereof) such Selling Stockholder will
     have, good and valid title to the Firm Shares to be sold by such Selling
     Stockholder hereunder, free and clear of all liens, encumbrances, equities
     or claims; and, upon delivery of such Firm Shares and payment therefor
     pursuant hereto and thereto, good and valid title to such Firm Shares, free
     and clear of all liens, encumbrances, equities or claims, will pass to the
     several Underwriters;

     (iv) During the period beginning from the date hereof and continuing to and
     including the date 180 days after the date of the Prospectus, not to offer,
     sell, contract to sell or otherwise dispose of, except as provided
     hereunder, any securities of the Company that are substantially similar to
     the Firm Shares, including but not limited to any securities that are
     convertible into or exchangeable for, or that represent the right to
     receive, Stock or any such substantially similar securities (other than
     pursuant to employee or director stock option plans or stock purchase plans
     existing on, or upon the conversion or exchange of convertible or
     exchangeable securities outstanding as of, the date of this Agreement),
     without your prior written consent;

     (v) Such Selling Stockholder has not taken and will not take, directly or
     indirectly, any action which is designed to or which has constituted or
     which might reasonably be expected to cause or result in stabilization or
     manipulation of the price of any security of the Company or to facilitate
     the sale or resale of the Shares;

     (vi) To the extent that any statements or omissions made in the
     Registration Statement, any Preliminary Prospectus, the Prospectus or any
     amendment or supplement thereto are made in reliance upon and in conformity
     with written information furnished to the Company by such Selling
     Stockholder expressly for use therein, such Preliminary Prospectus and the
     Registration Statement did, and the Prospectus and any further amendments
     or supplements to the Registration Statement and the Prospectus, when they
     become effective or are filed with the Commission, as the case may be, will
     conform in all material respects to the requirements of the Act and the
     rules and regulations of the Commission thereunder and will not contain any
     untrue statement of a material fact or omit to state any material fact
     required to be stated therein or necessary to make the statements therein
     not misleading;

     (vii)  In order to document the Underwriters' compliance with the reporting
     and withholding provisions of the Tax Equity and Fiscal Responsibility Act




                                       7
<PAGE>
 
     of 1982 with respect to the transactions herein contemplated, such Selling
     Stockholder will deliver to you prior to or at the First Time of Delivery
     (as hereinafter defined) a properly completed and executed United States
     Treasury Department Form W-9 (or other applicable form or statement
     specified by Treasury Department regulations in lieu thereof);

     (viii)  Certificates in negotiable form representing all of the Firm Shares
     to be sold by such Selling Stockholder hereunder have been placed in
     custody under a Custody Agreement, in the form heretofore furnished to you
     (the "Custody Agreement"), duly executed and delivered by such Selling
     Stockholder to the Company, as custodian (the "Custodian"), and such
     Selling Stockholder has duly executed and delivered a Power of Attorney, in
     the form heretofore furnished to you (the "Power of Attorney"), appointing
     the persons indicated in Schedule II hereto, and each of them, as such
     Selling Stockholder's attorneys-in-fact (the "Attorneys-in-Fact") with
     authority to execute and deliver this Agreement on behalf of such Selling
     Stockholder, to determine the purchase price to be paid by the Underwriters
     to the Selling Stockholders as provided in Section 2 hereof, to authorize
     the delivery of the Firm Shares to be sold by such Selling Stockholder
     hereunder and otherwise to act on behalf of such Selling Stockholder in
     connection with the transactions contemplated by this Agreement and the
     Custody Agreement; and

     (ix) The Firm Shares represented by the certificates held in custody for
     such Selling Stockholder under the Custody Agreement are subject to the
     interests of the Underwriters hereunder; the arrangements made by such
     Selling Stockholder for such custody, and the appointment by such Selling
     Stockholder of the Attorneys-in-Fact by the Power of Attorney, are to that
     extent irrevocable; the obligations of the Selling Stockholders hereunder
     shall not be terminated by operation of law, whether by the death or
     incapacity of any individual Selling Stockholder or, in the case of an
     estate or trust, by the death or incapacity of any executor or trustee or
     the termination of such estate or trust or, in the case of a partnership or
     corporation, by the dissolution of such partnership or corporation, or by
     the occurrence of any other event; if any individual Selling Stockholder or
     any such executor or trustee should die or become incapacitated, or if any
     such estate or trust should be terminated, or if any such partnership or
     corporation should be dissolved, or if any other such event should occur,
     before the delivery of the Firm Shares hereunder, certificates representing
     the Firm Shares shall be delivered by or on behalf of the Selling
     Stockholders in accordance with the terms and conditions of this Agreement
     and of the Custody Agreements; and actions taken by the Attorneys-in-Fact
     pursuant to the Powers of Attorney shall be as valid as if such death,
     incapacity, termination, dissolution or other event had not occurred,
     regardless of whether or not the Custodian, the Attorneys-in-Fact, or any
     of them, shall have received notice of such death, incapacity, termination,
     dissolution or other event.

     2.  Subject to the terms and conditions herein set forth, (a) the Company
and the Selling Stockholders agree, severally and not jointly, to sell to each
of the Underwriters, and each of the Underwriters agrees, severally and not
jointly, to purchase from the Company and each Selling Stockholder, at a
purchase price per share of $........................, the number of Firm Shares
(to be adjusted by you so as to eliminate fractional shares) determined by
multiplying the aggregate number of Firm Shares to be sold by the Company and
each of the Selling Stockholders as set forth opposite their respective names in
Schedule II hereto by a fraction the numerator of which is the aggregate number




                                       8
<PAGE>
 
of Firm Shares to be purchased by such Underwriter as set forth opposite the
name of such Underwriter in Schedule I hereto and the denominator of which is
the aggregate number of Firm Shares to be purchased by all of the Underwriters
from the Company and all of the Selling Stockholders hereunder and (b) in the
event and to the extent that the Underwriters shall exercise the election to
purchase Optional Shares as provided below, the Company agrees to sell to each
of the Underwriters, and each of the Underwriters agrees, severally and not
jointly, to purchase from the Company, at the purchase price per share set forth
in clause (a) of this Section 2, that portion of the number of Optional Shares
as to which such election shall have been exercised (to be adjusted by you so as
to eliminate fractional shares) determined by multiplying such number of
Optional Shares by a fraction the numerator of which is the maximum number of
Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of Optional Shares that all of the Underwriters
are entitled to purchase hereunder.

     The Company hereby grants to the Underwriters the right to purchase at
their election up to 390,375 Optional Shares, at the purchase price per share
set forth in the paragraph above, for the sole purpose of covering
overallotments in the sale of the Firm Shares. Any such election to purchase
Optional Shares may be exercised only by written notice from you to the Company,
given within a period of 30 calendar days after the date of this Agreement and
setting forth the aggregate number of Optional Shares to be purchased and the
date on which such Optional Shares are to be delivered, as determined by you but
in no event earlier than the First Time of Delivery (as defined in Section 4
hereof) or, unless you and the Company otherwise agree in writing, earlier than
two or later than ten business days after the date of such notice.

     3.  Upon the authorization by you of the release of the Firm Shares, the
several Underwriters propose to offer the Firm Shares for sale upon the terms
and conditions set forth in the Prospectus.

     4.  (a)  The Firm Shares and Optional Shares to be purchased by each
Underwriter hereunder, in definitive form, and in such authorized denominations
and registered in such names as Goldman, Sachs & Co. may request upon at least
48 hours' prior notice to the Company shall be delivered by or on behalf of the
Company and the Selling Stockholders to Goldman, Sachs & Co., for the account of
such Underwriter, against payment by or on behalf of such Underwriter of the
purchase price therefor by wire transfer or by certified or official bank check
or checks, payable to the order of the Company and the Custodian, if applicable,
in Federal (same day) funds.  The Company will cause the certificates
representing the Shares to be made available for checking and packaging at least
24 hours prior to the Time of Delivery (as defined below) with respect thereto
at the office of Goldman, Sachs & Co., 85 Broad Street, New York, New York 10004
(the "Designated Office").  The time and date of such delivery and payment shall
be, with respect to the Firm Shares, 9:30 a.m., New York City time, on
 ............., 1996 or such other time and date as Goldman, Sachs & Co. and the
Company may agree upon in writing, and, with respect to the Optional Shares,
9:30 a.m., New York City time, on the date specified by Goldman, Sachs & Co. in
the written notice given by Goldman, Sachs & Co. of the Underwriters' election
to purchase such Optional Shares, or such other time and date as Goldman, Sachs
& Co. and the Company may agree upon in writing.  Such time and date for
delivery of the Firm Shares is herein called the "First Time of Delivery", such



                                       9
<PAGE>
 
time and date for delivery of the Optional Shares, if not the First Time of
Delivery, is herein called the "Second Time of Delivery", and each such time and
date for delivery is herein called a "Time of Delivery".

     (b) The documents to be delivered at each Time of Delivery by or on behalf
of the parties hereto pursuant to Section 7 hereof, including the cross receipt
for the Shares and any additional documents requested by the Underwriters
pursuant to Section 7(k) hereof, will be delivered at the offices of Hale and
Dorr, 60 State Street, Boston, Massachusetts 02109 (the "Closing Location"), and
the Shares will be delivered at the Designated Office, all at each Time of
Delivery.  A meeting will be held at the Closing Location at 1:00 p.m., New York
City time, on the New York Business Day next preceding such Time of Delivery, at
which meeting the final drafts of the documents to be delivered pursuant to the
preceding sentence will be available for review by the parties hereto.  For the
purposes of this Section 4, "New York Business Day" shall mean each Monday,
Tuesday, Wednesday, Thursday and Friday which is not a day on which banking
institutions in New York are generally authorized or obligated by law or
executive order to close.

     5.  The Company agrees with each of the Underwriters:

     (a) To prepare the Prospectus in a form approved by you and to file such
     Prospectus pursuant to Rule 424(b) under the Act not later than the
     Commission's close of business on the second business day following the
     execution and delivery of this Agreement, or, if applicable, such earlier
     time as may be required by Rule 430A(a)(3) under the Act; to make no
     further amendment or any supplement to the Registration Statement or
     Prospectus prior to the last Time of Delivery which shall be disapproved by
     you promptly after reasonable notice thereof; to advise you, promptly after
     it receives notice thereof, of the time when any amendment to the
     Registration Statement has been filed or becomes effective or any
     supplement to the Prospectus or any amended Prospectus has been filed and
     to furnish you with copies thereof; to advise you, promptly after it
     receives notice thereof, of the issuance by the Commission of any stop
     order or of any order preventing or suspending the use of any Preliminary
     Prospectus or prospectus, of the suspension of the qualification of the
     Shares for offering or sale in any jurisdiction, of the initiation or
     threatening of any proceeding for any such purpose, or of any request by
     the Commission for the amending or supplementing of the Registration
     Statement or Prospectus or for additional information; and, in the event of
     the issuance of any stop order or of any order preventing or suspending the
     use of any Preliminary Prospectus or prospectus or suspending any such
     qualification, promptly to use its best efforts to obtain the withdrawal of
     such order;

     (b) Promptly from time to time to take such action as you may reasonably
     request to qualify the Shares for offering and sale under the securities
     laws of such jurisdictions as you may request and to comply with such laws
     so as to permit the continuance of sales and dealings therein in such
     jurisdictions for as long as may be necessary to complete the distribution
     of the Shares, provided that in connection therewith the Company shall not
     be required to qualify as a foreign corporation or to file a general
     consent to service of process in any jurisdiction;

     (c) Prior to 10:00 a.m., New York City time, on the New York Business Day
     next succeeding the date of this Agreement and from time to time, to
     



                                      10
<PAGE>
 
     furnish the Underwriters with copies of the Prospectus in New York City in
     such quantities as you may reasonably request, and, if the delivery of a
     prospectus is required at any time prior to the expiration of nine months
     after the time of issue of the Prospectus in connection with the offering
     or sale of the Shares and if at such time any event shall have occurred as
     a result of which the Prospectus as then amended or supplemented would
     include an untrue statement of a material fact or omit to state any
     material fact necessary in order to make the statements therein, in the
     light of the circumstances under which they were made when such Prospectus
     is delivered, not misleading, or, if for any other reason it shall be
     necessary during such period to amend or supplement the Prospectus in order
     to comply with the Act, to notify you and upon your request to prepare and
     furnish without charge to each Underwriter and to any dealer in securities
     as many copies as you may from time to time reasonably request of an
     amended Prospectus or a supplement to the Prospectus which will correct
     such statement or omission or effect such compliance, and in case any
     Underwriter is required to deliver a prospectus in connection with sales of
     any of the Shares at any time nine months or more after the time of issue
     of the Prospectus, upon your request but at the expense of such
     Underwriter, to prepare and deliver to such Underwriter as many copies as
     you may request of an amended or supplemented Prospectus complying with
     Section 10(a)(3) of the Act;

     (d) To make generally available to its security holders as soon as
     practicable, but in any event not later than eighteen months after the
     effective date of the Registration Statement (as defined in Rule 158(c)
     under the Act), an earnings statement of the Company (which need not be
     audited) complying with Section 11(a) of the Act and the rules and
     regulations of the Commission thereunder (including, at the option of the
     Company, Rule 158);

     (e) During the period beginning from the date hereof and continuing to and
     including the date 180 days after the date of the Prospectus, not to offer,
     sell, contract to sell or otherwise dispose of, except as provided
     hereunder and under the International Underwriting Agreement, any
     securities of the Company that are substantially similar to the Shares,
     including but not limited to any securities that are convertible into or
     exchangeable for, or that represent the right to receive, Stock or any such
     substantially similar securities (other than pursuant to employee or
     director stock option or stock purchase plans existing on, or upon the
     conversion or exchange of convertible or exchangeable securities
     outstanding as of, the date of this Agreement), without your prior written
     consent;

     (f) To furnish to its stockholders as soon as practicable after the end of
     each fiscal year an annual report (including a balance sheet and statements
     of income, stockholders' equity and cash flows of the Company certified by
     independent public accountants) and, as soon as practicable after the end
     of each of the first three quarters of each fiscal year (beginning with the
     fiscal quarter ending after the effective date of the Registration
     Statement), summary financial information of the Company for such quarter
     in reasonable detail;

     (g) During a period of five years from the effective date of the
     Registration Statement, to furnish to you copies of all reports or other
     communications (financial or other) furnished to stockholders, and to
     deliver to you (i) as soon as they are available, copies of any reports and



                                      11
<PAGE>
 
     financial statements furnished to or filed with the Commission or any
     national securities exchange on which any class of securities of the
     Company is listed; and (ii) such additional information concerning the
     business and financial condition of the Company as you may from time to
     time reasonably request (such financial statements to be on a consolidated
     basis to the extent the accounts of the Company and its subsidiaries are
     consolidated reports furnished to its stockholders generally or to the
     Commission);

     (h) To use the net proceeds received by it from the sale of the Shares
     pursuant to this Agreement and the International Underwriting Agreement in
     the manner specified in the Prospectus under the caption "Use of Proceeds";

     (i) To use its best efforts to list for quotation the Shares on the Nasdaq
     National Market ("NNM"); and

     (j) To file with the Commission such reports on Form SR as may be required
     by Rule 463 under the Act.

     6.  The Company and each of the Selling Stockholders covenant and agree
with one another and with the several Underwriters that (a) the Company  will
pay or cause to be paid the following:  (i) the fees, disbursements and expenses
of the Company's counsel and accountants in connection with the registration of
the Shares under the Act and all other expenses in connection with the
preparation, printing and filing of the Registration Statement, any Preliminary
Prospectus and the Prospectus and amendments and supplements thereto and the
mailing and delivering of copies thereof to the Underwriters and dealers; (ii)
the cost of printing or producing any Agreement among Underwriters, this
Agreement, the International Underwriting Agreement, the Agreement between
Syndicates, the Selling Agreement, the Blue Sky Memorandum, closing documents
(including any compilations thereof)  and any other documents in connection with
the offering, purchase, sale and delivery of the Shares; (iii) all expenses in
connection with the qualification of the Shares for offering and sale under
state securities laws as provided in subsection 5(b) hereof, including the fees
and disbursements of counsel for the Underwriters in connection with such
qualification and in connection with the Blue Sky survey; (iv) all fees and
expenses in connection with listing the Shares on the NNM; (v) the filing fees
incident to, and the fees and disbursements of counsel for the Underwriters in
connection with, securing any required review by the National Association of
Securities Dealers, Inc. of the terms of the sale of the Shares; (vi) the cost
of preparing stock certificates; (vii) the cost and charges of any transfer
agent or registrar; and (viii) all other costs and expenses incident to the
performance of its obligations hereunder which are not otherwise specifically
provided for in this Section; and (b) such Selling Stockholder will pay or cause
to be paid all costs and expenses incident to the performance of such Selling
Stockholder's obligations hereunder which are not otherwise specifically
provided for in this Section, including (i) any fees and expenses of counsel for
such Selling Stockholder, (ii) such Selling Stockholder's pro rata share of the
fees and expenses of the Attorneys-in-Fact and the Custodian and (iii) all
expenses and taxes incident to the sale and delivery of the Firm Shares to be
sold by such Selling Stockholder to the Underwriters hereunder.  In connection
with Clause (c)(iii) of the preceding sentence, Goldman, Sachs & Co. agrees to
pay New York State stock transfer tax, and the Selling Stockholder agrees to
reimburse Goldman, Sachs & Co. for associated carrying costs if such tax payment
is not rebated on the day of payment and for any portion of such tax payment not



                                      12
<PAGE>
 
rebated.  It is understood, however, that the Company shall bear, and the
Selling Stockholders shall not be required to pay or to reimburse the Company
for, the cost of any other matters not directly relating to the sale and
purchase of the Shares pursuant to this Agreement.  It is understood, however,
that, except as provided in this Section, and Sections 8 and 11 hereof, the
Underwriters will pay all of their own costs and expenses, including the fees of
their counsel, stock transfer taxes on resale of any of the Shares by them, and
any advertising expenses connected with any offers they may make.

     7.  The obligations of the Underwriters hereunder, as to the Shares to be
delivered at each Time of Delivery, shall be subject, in their discretion, to
the condition that all representations and warranties and other statements of
the Company and of the Selling Stockholders herein are, at and as of such Time
of Delivery, true and correct, the condition that the Company and the Selling
Stockholders shall have performed all of its and their obligations hereunder
theretofore to be performed, and the following additional conditions:

     (a) The Prospectus shall have been filed with the Commission pursuant to
     Rule 424(b) within the applicable time period prescribed for such filing by
     the rules and regulations under the Act and in accordance with Section 5(a)
     hereof; no stop order suspending the effectiveness of the Registration
     Statement or any part thereof shall have been issued and no proceeding for
     that purpose shall have been initiated or threatened by the Commission; and
     all requests for additional information on the part of the Commission shall
     have been complied with to your reasonable satisfaction;

     (b) Shearman & Sterling, counsel for the Underwriters, shall have furnished
     to you such opinion dated such Time of Delivery, with respect to the
     matters covered in paragraphs (i), (ii), (v), (x) and (xii) of subsection
     (c) below as well as such other related matters as you may reasonably
     request, and such counsel shall have received such papers and information
     as they may reasonably request to enable them to pass upon such matters;

     (c) Hale and Dorr, counsel for the Company, shall have furnished to you
     their written opinion a draft of such opinion is attached as Annex II(a)
     hereto), dated such Time of Delivery, in form and substance satisfactory to
     you, to the effect that:

     (i)  The Company has been duly incorporated and is validly existing as a
          corporation in good standing under the laws of the State of Delaware,
          with full corporate power and authority to own its properties and
          conduct its business as described in the Prospectus;

     (ii) The Company has an authorized capitalization as set forth in the
          Prospectus, and all of the issued shares of capital stock of the
          Company (including the Shares being delivered at such Time of
          Delivery) have been duly and validly authorized and issued and are
          fully paid and non-assessable; and the Shares conform to the
          description of the Stock contained in the Prospectus under the caption
          "Description of Capital Stock";

     (iii)  The Company has been duly qualified as a foreign corporation for the
          transaction of business and is in good standing under the laws of the



                                      13
<PAGE>
 
          Commonwealth of Massachusetts, which to such counsel's knowledge is
          the only jurisdiction in which the Company owns or leases property or
          maintains an office (such counsel being entitled to rely in respect of
          the opinion in this clause relating to matters of fact upon
          certificates of officers of the Company, provided that such counsel
          shall state that they believe that both you and they are justified in
          relying upon such opinions and certificates);

     (iv) To such counsel's knowledge and other than as set forth in the
          Prospectus, there are no legal or governmental proceedings pending to
          which the Company is a party or of which any property of the Company
          is the subject and, to such counsel's knowledge, no such proceedings
          are threatened or contemplated by governmental authorities or
          threatened by others;

     (v)  This Agreement and the International Underwriting Agreement have been
          duly authorized, executed and delivered by the Company;

     (vi) The issue and sale of the Shares being delivered at such Time of
          Delivery to be sold by the Company and the compliance by the Company
          with all of the provisions of this Agreement and the International
          Underwriting Agreement and the consummation of the transactions herein
          and therein contemplated will not conflict with or result in a breach
          or violation of any of the terms or provisions of, or constitute a
          default under, any agreement or instrument filed as an exhibit to the
          Registration Statement, including any indenture, mortgage, deed of
          trust, loan agreement, registration rights agreement, warrant
          agreement, investors' rights agreement, license agreement, research
          agreement, distribution agreement, or other agreement or instrument to
          which the Company is a party or by which the Company is bound or to
          which any of the property or assets of the Company is subject, nor
          will such action result in any violation of the provisions of the
          Certificate of Incorporation or By-laws of the Company or any statute
          or any order, rule or regulation known to such counsel of any court or
          governmental agency or body having jurisdiction over the Company or
          any of its properties;

     (vii)  No consent, approval, authorization, order, registration or
          qualification of or with any such court or governmental agency or body
          is required for the issue and sale of the Shares or the consummation
          by the Company of the transactions contemplated by this Agreement and
          the International Underwriting Agreement, except the registration
          under the Act of the Shares, and such consents, approvals,
          authorizations, registrations or qualifications as may be required
          under state or foreign securities or Blue Sky laws in connection with
          the purchase and distribution of the Shares by the Underwriters and
          the International Underwriters or under the rules of the National
          Association of Securities Dealers, Inc.;

     (viii)  Each of the MIT License Agreements is in full force and effect and
          constitutes a valid and binding agreement between the parties thereto,
          enforceable in accordance with its terms, subject as to enforcement to
          bankruptcy, insolvency, reorganization and other laws of general
          applicability relating to or affecting creditors' rights and to
          general equity principles; and the statements in the Prospectus under
          



                                      14
<PAGE>
 
          the captions "Risk Factors-Dependence on Licenses" and "Business-
          Patents, Trade Secrets and Proprietary Rights", insofar as they
          purport to describe the provisions of the MIT License Agreements, are
          accurate, complete and fair summaries thereof in all material
          respects;

     (ix) The statements set forth in the Prospectus under the caption "Shares
          Eligible for Future Sale", insofar as such statements purport to
          describe the provisions of the laws and documents referred to therein,
          are accurate, complete and fair summaries thereof in all material
          respects;

     (x)  The statements set forth in the Prospectus under the caption
          "Description of Capital Stock", insofar as they purport to constitute
          a summary of the terms of the Stock and the laws and documents
          referred to therein, and under the captions "Underwriting" [and
          "Certain U.S. Federal Tax Considerations for Non-U.S. Holders"],
          insofar as they purport to describe the provisions of the laws and
          documents referred to therein, are accurate, complete and fair
          summaries of such terms and provisions in all material respects;

     (xi) The Company is not an "investment company" or an entity "controlled"
          by an "investment company", as such terms are defined in the
          Investment Company Act; and

     (xii)  The Registration Statement and the Prospectus and any further
          amendments and supplements thereto made by the Company prior to such
          Time of Delivery (other than the financial statements, related
          schedules or other financial data therein, as to which such counsel
          need express no opinion) comply as to form in all material respects
          with the requirements of the Act and the rules and regulations
          thereunder; and they do not know of any amendment to the Registration
          Statement required to be filed or of any contracts or other documents
          of a character required to be filed as an exhibit to the Registration
          Statement or required to be described in the Registration Statement or
          the Prospectus which are not filed or described as required.

     In addition to the matters set forth above, such counsel shall also include
     a statement to the following effect:  in connection with the preparation of
     the Registration Statement and the Prospectus, such counsel has
     participated in conferences with officers and representatives of the
     Company and the independent accountants of the Company, at which
     conferences such counsel has made inquiries of such persons and others and
     discussed the contents of the Registration Statement and the Prospectus and
     has reviewed the Company's Certificate of Incorporation and Bylaws.  While
     the limitations inherent in the independent verification of factual matters
     and the character of determinations involved in the registration process
     are such that such counsel is not passing upon and does not assume any
     responsibility for the accuracy, completeness or fairness of the statements
     contained in the Registration Statement or the Prospectus (except as
     specifically referred to in subsections (viii), (ix) and (x) of this
     Section 7(c)), nothing has come to such counsel's attention which has
     caused them to believe that the Registration Statement, as of its effective
     date, contained any untrue statement of a material fact or omitted to state
     any material fact required to be stated therein or necessary in order to
     



                                      15
<PAGE>
 
     make the statements therein not misleading (except that such counsel need
     not express such statement with respect to the financial statements,
     related schedules or other financial data included in the Registration
     Statement), and nothing has come to such counsel's attention which has
     caused such counsel to believe that the Prospectus, as of its date or at
     such Time of Delivery, contained any untrue statement of a material fact or
     omitted to state any material fact necessary in order to make the
     statements therein, in light of the circumstances under which they were
     made, not misleading (except that such counsel need not express such
     statement with respect to the financial statements, related schedules or
     other financial data included in the Prospectus).

     In rendering such opinion, such counsel may state that they express no
     opinion as to the laws of any jurisdiction outside the United States and
     may, as to questions of law not involving the laws of the United States,
     the Commonwealth of Massachusetts, [the State of New York] or the Delaware
     General Corporation Law, assume, without independent inquiry, that such
     laws are the same as those of the Commonwealth of Massachusetts;

     (d) Hale and Dorr, as special counsel for [each][certain] of the Selling
     Stockholders, as indicated in Schedule II hereto, shall have furnished to
     you its written opinion with respect to each of the Selling Stockholders
     for whom it is acting as counsel, dated such Time of Delivery, in form and
     substance satisfactory to you, to the effect that:

     (i)  A Power of Attorney and a Custody Agreement have been duly executed
          and delivered by such Selling Stockholder and constitute valid and
          binding agreements of such Selling Stockholder in accordance with
          their terms;

     (ii) This Agreement has been duly executed and delivered by or on behalf of
          each of the Selling Stockholders, and the Custody Agreement between
          each Selling Stockholder and the Custodian and the Power of Attorney
          referred to in such Custody Agreement have been duly executed and
          delivered by each of the Selling Stockholders;

     (iii)  Upon registration of the Firm Shares to be sold by the Selling
          Stockholders hereunder in the names of the Underwriters in the stock
          records of the Company, and assuming the Underwriters purchased such
          stock in good faith and without notice of any adverse claim within the
          meaning of Section 8-302 of the Uniform Commercial Code as in effect
          in the Commonwealth of Massachusetts, the Underwriters will have
          acquired all rights of the Selling Stockholders in such Firm Shares
          free and clear of any adverse claim, any lien in favor of the Company
          and any restrictions on transfer imposed by the Company; and

     (iv) Based insofar as factual matters are concerned solely upon
          representations and warranties of the Company and Selling Stockholders
          included in the Custody Agreement and Power of Attorney, no consent,
          approval, authorization or order of any court or governmental agency
          or body is required for the consummation by the Company and the
          Selling Stockholders of the transactions contemplated by the
          



                                      16
<PAGE>
 
          Underwriting Agreement, except such as have been obtained or made and
          are in full force and effect and such as may be required by the NASD,
          or by State securities and Blue Sky laws, as to which such counsel
          need express no opinion.

     In rendering such opinion, such counsel may state that it expresses no
     opinion as to the laws of any jurisdiction outside the United States and
     may, as to questions of law not involving the laws of the United States,
     the Commonwealth of Massachusetts, [the State of New York] or the Delaware
     General Corporation Law, assume, without independent inquiry, that such
     laws are the same as those of the Commonwealth of Massachusetts; and in
     rendering the opinion in subparagraph (iv) such counsel may rely upon the
     representations and warranties of such Selling Stockholder in respect of
     matters of fact, provided that such counsel shall state that it believes
     that both you and it are justified in relying upon such representations and
     warranties;

     (e) Each of Choate, Hall & Stewart and Fish & Richardson, patent counsel
     for the Company, shall have furnished to you their written opinions (drafts
     of such opinions are attached hereto as Annex II(c) and II(d),
     respectively), dated such Time of Delivery, in form and substance
     satisfactory to you;

     (f) King & Spalding, regulatory counsel for the Company, shall have
     furnished to you their written opinion (which is attached hereto as Annex
     II(e)) dated such Time of Delivery, in form and substance satisfactory to
     you to the effect that it has examined the Registration Statement and;
 
     (i)  The statements under the caption "Risk Factors-Government Regulation;
          Future Product Approvals Uncertain" and "Business-Government
          Regulation" in the Prospectus, are, in all material respects, accurate
          and fair statements or summaries of applicable federal law and
          regulation as applied by the FDA, subject to the qualifications set
          forth therein;

     (ii) No facts have come to the attention of such counsel that lead it to
          believe that the information contained under the captions "Risk
          Factors-Government Regulation; Future Product Approvals Uncertain" and
          "Business-Government Regulation" (a) in the Registration Statement, at
          the time the Registration Statement became effective, contained any
          untrue statement of a material fact, or omitted to state any material
          fact required to be stated therein or necessary to make the statements
          therein not misleading, or (b) in the Prospectus, at the time the
          Prospectus was issued or at the date hereof, contained any untrue
          statement of a material fact, or omitted to state any material fact
          required to be stated therein or necessary to make the statements
          therein, in light of the circumstances under which they were made, not
          misleading; and

     (iii)  Such counsel has no actual knowledge of any action, suit or
          proceeding pending or threatened by the FDA against the Company
          seeking limitation, suspension, or revocation of any license, permit,
          approval or authorization required by the Company to conduct its
          business as described in the Registration Statement and the
          Prospectus.



                                      17
<PAGE>
 
     (g) On the date of the Prospectus at a time prior to the execution of this
     Agreement, at 9:30 a.m., New York City time, on the effective date of any
     post-effective amendment to the Registration Statement filed subsequent to
     the date of this Agreement and also at each Time of Delivery, Price
     Waterhouse LLP shall have furnished to you a letter or letters, dated the
     respective dates of delivery thereof, in form and substance satisfactory to
     you, to the effect set forth in Annex I hereto (the executed copy of the
     letter delivered prior to the execution of this Agreement is attached as
     Annex I(a) hereto and a draft of the form of letter to be delivered on the
     effective date of any post-effective amendment to the Registration
     Statement as of each Time of Delivery is attached as Annex I(b) hereto);

     (h) (i) The Company shall not have sustained since the date of the latest
     audited financial statements included in the Prospectus any loss or
     interference with its business from fire, explosion, flood or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     court or governmental action, order or decree, otherwise than as set forth
     or contemplated in the Prospectus, and (ii) since the respective dates as
     of which information is given in the Prospectus there shall not have been
     any change in the capital stock or long-term debt (including obligations
     under capital leases) of the Company or any change, or any development
     involving a prospective change, in or affecting the general affairs,
     management, financial position, stockholders' equity or results of
     operations of the Company, otherwise than as set forth or contemplated in
     the Prospectus, the effect of which, in any such case described in Clause
     (i) or (ii), is in your judgment as representatives of the Underwriters
     (the "Representatives") so material and adverse as to make it impracticable
     or inadvisable to proceed with the public offering or the delivery of the
     Shares being delivered at such Time of Delivery on the terms and in the
     manner contemplated in the Prospectus;

     (i) On or after the date hereof there shall not have occurred any of the
     following: (i) a suspension or material limitation in trading in securities
     generally on the New York Stock Exchange or on NNM; (ii) a suspension or
     material limitation in trading in the Company's securities on NNM; (iii) a
     general moratorium on commercial banking activities declared by either
     Federal or New York State or Commonwealth of Massachusetts authorities; or
     (iv) the outbreak or escalation of hostilities involving the United States
     or the declaration by the United States of a national emergency or war, if
     the effect of any such event specified in this clause (iv) in the judgment
     of the Representatives makes it impracticable or inadvisable to proceed
     with the public offering or the delivery of the Shares being delivered at
     such Time of Delivery on the terms and in the manner contemplated in the
     Prospectus;

     (j) The Shares to be sold by the Company and the Firm Shares to be sold by
     the Selling Stockholders at such Time of Delivery shall have been duly
     listed for quotation on NNM;

     (k) The Company has obtained and delivered to the Underwriters executed
     copies of an agreement from each of the executive officers, directors,
     stockholders, option holders and warrant holders listed on Schedule I
     attached hereto, substantially to the effect set forth in subsection 5(e)
     hereof in form and substance satisfactory to you;
     



                                      18
<PAGE>
 
     (l) The Company and the Selling Stockholders shall have furnished or caused
     to be furnished to you at such Time of Delivery certificates of officers of
     the Company and of the Selling Stockholders, respectively, satisfactory to
     you as to the accuracy of the representations and warranties of the Company
     and the Selling Stockholders, respectively, herein at and as of such Time
     of Delivery, as to the performance by the Company and the Selling
     Stockholders of all of their respective obligations hereunder to be
     performed at or prior to such Time of Delivery, as to the matters set forth
     in subsections (a) and (g) of this Section and as to such other matters as
     you may reasonably request;

     (m) The Company shall have complied with the provisions of subsection 5(c)
     hereof with respect to the furnishing of prospectuses on the New York
     Business Day next succeeding the date of this Agreement.

     8.  (a)  The Company  will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (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 Preliminary Prospectus, the Registration
Statement or the Prospectus, 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, and will reimburse each Underwriter for any legal or
other expenses reasonably incurred by such Underwriter in connection with
investigating or defending any such action or claim as such expenses are
incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Prospectus, the Registration Statement
or the Prospectus or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
through Goldman, Sachs & Co. expressly for use therein.

     (b) Each Selling Stockholder will indemnify and hold harmless each
Underwriter severally, but not jointly, against any losses, claims, damages or
liabilities, joint or several, to which such Underwriter may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (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
Preliminary Prospectus, the Registration Statement or the Prospectus, 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, in each case
to the extent, but only to the extent, that such untrue statement or alleged
untrue statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by such Selling Stockholder expressly for use therein;
and will reimburse each Underwriter for any legal or other expenses reasonably
incurred by such Underwriter in connection with investigating or defending any
such action or claim as such expenses are incurred; provided, however, that (a)
such Selling Stockholder shall not be liable in any such case to the extent that
any such loss, claim, damage or liability arises out of or is based upon an




                                      19
<PAGE>
 
untrue statement or alleged untrue statement or omission or alleged omission
made in any Preliminary Prospectus, the Registration Statement or the Prospectus
or any such amendment or supplement in reliance upon and in conformity with
written information furnished to the Company by any Underwriter through Goldman,
Sachs & Co. expressly for use therein, and (b) the maximum liability of any
Selling Stockholder under this Section 8(b) shall be equal to the gross proceeds
received by such Selling Stockholder as a result of the sale of Shares under
this Agreement.

     (c) Each Underwriter will indemnify and hold harmless the Company and each
Selling Stockholder against any losses, claims, damages or liabilities to which
the Company or such Selling Stockholder may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (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 Preliminary Prospectus, the
Registration Statement or the Prospectus, 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, in each case to the extent, but only to
the extent, that such untrue statement or alleged untrue statement or omission
or alleged omission was made in any Preliminary Prospectus, the Registration
Statement or the Prospectus or any such amendment or supplement in reliance upon
and in conformity with written information furnished to the Company by such
Underwriter through Goldman, Sachs & Co. expressly for use therein; and will
reimburse the Company and each Selling Stockholder for any legal or other
expenses reasonably incurred by the Company or such Selling Stockholder in
connection with investigating or defending any such action or claim as such
expenses are incurred.

     (d) Promptly after receipt by an indemnified party under subsection (a),
(b) or (c) above of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against an indemnifying
party under such subsection, notify the indemnifying party in writing of the
commencement thereof; but the omission so to notify the indemnifying party shall
not relieve it from any liability which it may have to any indemnified party
otherwise than under such subsection.  In case any such action shall be brought
against any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate
therein and, to the extent that it shall wish, jointly with any other
indemnifying party similarly notified, to assume the defense thereof, with
counsel satisfactory to such indemnified party (which shall not, except with the
consent of the indemnified party, be counsel to the indemnifying party), and,
after notice from the indemnifying party to such indemnified party of its
election so to assume the defense thereof, the indemnifying party shall not be
liable to such indemnified party under such subsection for any legal expenses of
other counsel or any other expenses, in each case subsequently incurred by such
indemnified party, in connection with the defense thereof other than reasonable
costs of investigation.  No indemnifying party shall, without the written
consent of the indemnified party, effect the settlement or compromise of, or
consent to the entry of any judgment with respect to, any pending or threatened
action or claim in respect of which indemnification or contribution may be
sought hereunder (whether or not the indemnified party is an actual or potential
party to such action or claim) unless such settlement, compromise or judgment
(i) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (ii) does not include a
statement as to or an admission of fault, culpability or a failure to act, by or
on behalf of any indemnified party.




                                      20
<PAGE>
 
     (e) If the indemnification provided for in this Section 8 is unavailable to
or insufficient to hold harmless an indemnified party under subsection (a), (b)
or (c) above in respect of any losses, claims, damages or liabilities (or
actions in respect thereof) referred to therein, then each indemnifying party
shall contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages or liabilities (or actions in respect
thereof) in such proportion as is appropriate to reflect the relative benefits
received by the Company and the Selling Stockholders on the one hand and the
Underwriters on the other from the offering of the Shares.  If, however, the
allocation provided by the immediately preceding sentence is not permitted by
applicable law or if the indemnified party failed to give the notice required
under subsection (d) above, then each indemnifying party shall contribute to
such amount paid or payable by such indemnified party in such proportion as is
appropriate to reflect not only such relative benefits but also the relative
fault of the Company and the Selling Stockholders on the one hand and the
Underwriters on the other in connection with the statements or omissions which
resulted in such losses, claims, damages or liabilities (or actions in respect
thereof), as well as any other relevant equitable considerations.  The relative
benefits received by the Company and the Selling Stockholders on the one hand
and the Underwriters on the other shall be deemed to be in the same proportion
as the total net proceeds from the offering of the Shares purchased under this
Agreement (before deducting expenses) received by the Company and the Selling
Stockholders bear to the total underwriting discounts and commissions received
by the Underwriters with respect to the Shares purchased under this Agreement,
in each case as set forth in the table on the cover page of the Prospectus. The
relative fault shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Company or the Selling Stockholders on the one hand or the Underwriters on the
other and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission.  The Company, each
of the Selling Stockholders and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (e) were determined
by pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (e).  The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to above
in this subsection (e) shall be deemed to include any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim.  Notwithstanding the provisions of this
subsection (e), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Shares underwritten
by it and distributed to the public were offered to the public exceeds the
amount of any damages which such Underwriter has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission, and no Selling Stockholder  shall be required to contribute any amount
in excess of the gross proceeds received by such Selling Stockholder as a result
of the sale of Shares under this Agreement..  No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Act) shall be
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation.  The Underwriters' obligations in this subsection (e) to
contribute are several in proportion to their respective underwriting
obligations and not joint.

     (f) The obligations of the Company and the Selling Stockholders under this
Section 8 shall be in addition to any liability which the Company and the




                                      21
<PAGE>
 
respective Selling Stockholders may otherwise have and shall extend, upon the
same terms and conditions, to each person, if any, who controls any Underwriter
within the meaning of the Act; and the obligations of the Underwriters under
this Section 8 shall be in addition to any liability which the respective
Underwriters may otherwise have and shall extend, upon the same terms and
conditions, to each officer and director of the Company and to each person, if
any, who controls the Company or any Selling Stockholder within the meaning of
the Act.

     9.  (a)  If any Underwriter shall default in its obligation to purchase the
Shares which it has agreed to purchase hereunder at a Time of Delivery, you may
in your discretion arrange for you or another party or other parties to purchase
such Shares on the terms contained herein.  If within 36 hours after such
default by any Underwriter you do not arrange for the purchase of such Shares,
then the Company and the Selling Stockholders shall be entitled to a further
period of 36 hours within which to procure another party or other parties
satisfactory to you to purchase such Shares on such terms.  In the event that,
within the respective prescribed periods, you notify the Company and the Selling
Stockholders that you have so arranged for the purchase of such Shares, or the
Company and the Selling Stockholders notify you that they have so arranged for
the purchase of such Shares, you or the Company and the Selling Stockholders
shall have the right to postpone such Time of Delivery for a period of not more
than seven days, in order to effect whatever changes may thereby be made
necessary in the Registration Statement or the Prospectus, or in any other
documents or arrangements, and the Company agrees to file promptly any
amendments to the Registration Statement or the Prospectus which in your opinion
may thereby be made necessary.  The term "Underwriter" as used in this Agreement
shall include any person substituted under this Section with like effect as if
such person had originally been a party to this Agreement with respect to such
Shares.

     (b) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased does not exceed one-eleventh of
the aggregate number of all of the Shares to be purchased at such Time of
Delivery, then the Company and the Selling Stockholders shall have the right to
require each non-defaulting Underwriter to purchase the number of Shares which
such Underwriter agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

     (c) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased exceeds one-eleventh of the
aggregate number of all of the Shares to be purchased at such Time of Delivery,
or if the Company and the Selling Stockholders shall not exercise the right
described in subsection (b) above to require non-defaulting Underwriters to
purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement
(or, with respect to the Second Time of Delivery, the obligations of the
Underwriters to purchase and of the Company to sell the Optional Shares) shall
thereupon terminate, without liability on the part of any non-defaulting
Underwriter or the Company or the Selling Stockholders, except for the expenses
to be borne by the Company and the Selling Stockholders and the Underwriters as




                                      22
<PAGE>
 
provided in Section 6 hereof and the indemnity and contribution agreements in
Section 8 hereof; but nothing herein shall relieve a defaulting Underwriter from
liability for its default.

     10.  The respective indemnities, agreements, representations, warranties
and other statements of the Company, the Selling Stockholders and the several
Underwriters, as set forth in this Agreement or made by or on behalf of them,
respectively, pursuant to this Agreement, shall remain in full force and effect,
regardless of any investigation (or any statement as to the results thereof)
made by or on behalf of any Underwriter or any controlling person of any
Underwriter, or the Company or any of the Selling Stockholders, or any officer
or director or controlling person of the Company or any controlling person of
any Selling Stockholder, and shall survive delivery of and payment for the
Shares.

     Anything herein to the contrary notwithstanding, the indemnity agreement of
the Company in subsection (a) of Section 8 hereof, the representations and
warranties in subsections (a)(ii) and (a)(iii) of Section 1 hereof and any
representation or warranty as to the accuracy of the Registration Statement or
the Prospectus contained in any certificate furnished by the Company pursuant to
Section 7 hereof, insofar as they may constitute a basis for indemnification for
liabilities (other than payment by the Company of expenses incurred or paid in
the successful defense of any action, suit or proceeding) arising under the Act,
shall not extend to the extent of any interest therein of a controlling person
or partner of an Underwriter who is a director, officer or controlling person of
the Company when the Registration Statement has become effective, except in each
case to the extent that an interest of such character shall have been determined
by a court of appropriate jurisdiction as not against public policy as expressed
in the Act.  Unless in the opinion of counsel for the Company the matter has
been settled by controlling precedent, the Company will, if a claim for such
indemnification is asserted, submit to a court of appropriate jurisdiction the
question of whether such interest is against public policy as expressed in the
Act and will be governed by the final adjudication of such issue.

     11.  If this Agreement shall be terminated pursuant to Section 9 hereof,
neither the Company nor the Selling Stockholders shall be under any liability to
any Underwriter except as provided in Sections 6 and 8 hereof; but, if for any
other reason, any Shares are not delivered by or on behalf of the Company and
the Selling Stockholders as provided herein, the Company will reimburse the
Underwriters through you for all out-of-pocket expenses approved in writing by
you, including fees and disbursements of counsel, reasonably incurred by the
Underwriters in making preparations for the purchase, sale and delivery of the
Shares not so delivered, but the Company and the Selling Stockholders shall then
be under no further liability to any Underwriter in respect of the Shares not so
delivered except as provided in Sections 6 and 8 hereof.

     12.  In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you jointly or by Goldman, Sachs & Co. on behalf of you as the
Representatives.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to you as the Representatives in care of Goldman, Sachs &
Co., 85 Broad Street, New York, New York  10004, Attention: Registration




                                      23
<PAGE>
 
Department; if to any Selling Stockholder shall be delivered or sent by mail,
telex or facsimile transmission to counsel for such Selling Stockholder at its
address set forth in Schedule II hereto; and if to the Company shall be
delivered or sent by mail, telex or facsimile transmission to the address of the
Company set forth in the Registration Statement, Attention: Secretary; provided,
however, that any notice to an Underwriter pursuant to Section 8(d) hereof shall
be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its Underwriters' Questionnaire, or
telex constituting such Questionnaire, which address will be supplied to the
Company or the Selling Stockholders by you upon request.  Any such statements,
requests, notices or agreements shall take effect upon receipt thereof.

     13.  This Agreement shall be binding upon, and inure solely to the benefit
of, the Underwriters, the Company and the Selling Stockholders and, to the
extent provided in Sections 8 and 10 hereof, the officers and directors of the
Company and each person who controls the Company, any Selling Stockholder or any
Underwriter, and their respective heirs, executors, administrators, successors
and assigns, and no other person shall acquire or have any right under or by
virtue of this Agreement.  No purchaser of any of the Shares from any
Underwriter shall be deemed a successor or assign by reason merely of such
purchase.

     14.  Time shall be of the essence of this Agreement.  As used herein, the
term "business day" shall mean any day when the Commission's office in
Washington, D.C. is open for business.

     15.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK.

     16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.


                               *        *       *
     If the foregoing is in accordance with your understanding, please sign and
return to us eight (8) counterparts hereof, and upon the acceptance hereof by
you, on behalf of each of the Underwriters, this letter and such acceptance
hereof shall constitute a binding agreement among each of the Underwriters, the
Company and each of the Selling Stockholders.  It is understood that your
acceptance of this letter on behalf of each of the Underwriters is pursuant to
the authority set forth in a form of Agreement among Underwriters (U.S.
Version), the form of which shall be submitted to the Company and the Selling
Stockholders for examination upon request, but without warranty on your part as
to the authority of the signers thereof.

     Any person executing and delivering this Agreement as Attorney-in-Fact for
a Selling Stockholder represents by so doing that he has been duly appointed as
Attorney-in-Fact by such Selling Stockholder pursuant to a validly existing and
binding Power of Attorney which authorizes such Attorney-in-Fact to take such
action.


                              Very truly yours,




                                      24
<PAGE>
 
                              Cambridge Heart, Inc.


                              By:________________________________
                                 Name:
                                 Title:


                              D.H. Blair & Co
                              Jordan Davis
                              Pamela Fenwick
                              Steven Francis
                              Irene French
                              Jerome Herskowitz
                              Lisette Jacobs
                              Jeffrey Katz
                              Jack & Madeleine Kern
                              Neil Lowenbraun
                              Daniel Lubin
                              Karl & Janet Mangold
                              Melvin Miller
                              Ron Miller
                              Melvin Speilman
                              Blanche Strojny
                              Paul Wang

                              By:
                                 Name:
                                 Title:

                              As Attorney-in-Fact acting on behalf of each of
                              the Selling Stockholders named in Schedule II to
                              this Agreement.


Accepted as of the date hereof:



Goldman, Sachs & Co.
Bear, Stearns & Co. Inc.


By:_______________________________________
          (Goldman, Sachs & Co.)

     On behalf of each of the Underwriters





                                      25
<PAGE>
 
                                   SCHEDULE I
<TABLE>
<CAPTION>
 
 
                                                           Number of Optional
                                                                  Shares        
                                                           to be Purchased if
                               Total Number of Firm          Maximum Option
      Underwriter             Shares to be Purchased             Exercised
- ----------------------       ------------------------   ------------------------
<S>                          <C>                        <C>
Goldman, Sachs & Co.
Bear, Stearns & Co. Inc.
[Names of other
 Underwriters]
                                     ---------                   -------
     Total                           2,602,525                   390,375
                                     =========                   =======
 
</TABLE> 
<PAGE>
 <TABLE>

<CAPTION> 
SCHEDULE II
 
 
                                                            TOTAL NUMBER OF
                                                              FIRM SHARES
                                                               TO BE SOLD
<S>                                                       <C>
The Company...............................................
The Selling Stockholder(s):
D.H. Blair & Co (a)
Jordan Davis (b)
Pamela Fenwick (c)
Steven Francis (d)
Irene French (e)
Jerome Herskowitz (f)
Lisette Jacobs (g)
Jeffrey Katz (h)
Jack & Madeleine Kern (i)
Neil Lowenbraun (j)
Daniel Lubin (k)
Karl & Janet Mangold (l)
Melvin Miller (m)
Ron Miller (n)
Melvin Speilman (o)
Blanche Strojny (p)
Paul Wang (q)
 
 
 
 
 
     Total                                                     202,525
                                                               =======
 
</TABLE>
(a)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(b)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(c)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(d)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
<PAGE>
 
(e)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(f)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(g)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(h)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(i)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(j)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(k)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(l)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(m)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(n)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(o)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(p)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
(q)  This Selling Stockholder is represented by [NAME AND ADDRESS OF COUNSEL]
     and has appointed [NAMES OF ATTORNEYS-IN-FACT (NOT LESS THAN TWO)], and
     each of them, as the Attorneys-i n-Fact for such Selling Stockholder.
<PAGE>
 
                                                                      ANNEX I(A)

                 FORM OF ANNEX I DESCRIPTION OF COMFORT LETTER
                    FOR REGISTRATION STATEMENTS ON FORM S-1

     Pursuant to Section 7(f) of the Underwriting Agreement, the accountants
shall furnish letters to the Underwriters to the effect that:

          (i) They are independent certified public accountants with respect to
     the Company and its subsidiaries within the meaning of the Act and the
     applicable published rules and regulations thereunder;

          (ii) In their opinion, the financial statements and any supplementary
     financial information and schedules (and, if applicable, financial
     forecasts and/or pro forma financial information) examined by them and
     included in the Prospectus or the Registration Statement comply as to form
     in all material respects with the applicable accounting requirements of the
     Act and the related published rules and regulations thereunder; and, if
     applicable, they have made a review in accordance with standards
     established by the American Institute of Certified Public Accountants of
     the unaudited consolidated interim financial statements, selected financial
     data, pro forma financial information, financial forecasts and/or condensed
     financial statements derived from audited financial statements of the
     Company for the periods specified in such letter, as indicated in their
     reports thereon, copies of which have been furnished separately to the
     representatives of the Underwriters (the "Representatives");

          (iii)  They have made a review in accordance with standards
     established by the American Institute of Certified Public Accountants of
     the unaudited condensed consolidated statements of income, consolidated
     balance sheets and consolidated statements of cash flows included in the
     Prospectus as indicated in their reports thereon copies of which have been
     separately furnished to the Representatives and on the basis of specified
     procedures including inquiries of officials of the Company who have
     responsibility for financial and accounting matters regarding whether the
     unaudited condensed consolidated financial statements referred to in
     paragraph (vi)(A)(i) below comply as to form in all material respects with
     the applicable accounting requirements of the Act and the related published
     rules and regulations, nothing came to their attention that caused them to
     believe that the unaudited condensed consolidated financial statements do
     not comply as to form in all material respects with the applicable
     accounting requirements of the Act and the related published rules and
     regulations;

          (iv) The unaudited selected financial information with respect to the
     consolidated results of operations and financial position of the Company
     for the five most recent fiscal years included in the Prospectus agrees
     with the corresponding amounts (after restatements where applicable) in the
     audited consolidated financial statements for such five fiscal years which
     were included or incorporated by reference in the Company's Annual Reports
     on Form 10-K for such fiscal years;

          (v) They have compared the information in the Prospectus under
     selected captions with the disclosure requirements of Regulation S-K and on
     the basis of limited procedures specified in such letter nothing came to
     
<PAGE>
 
     their attention as a result of the foregoing procedures that caused them to
     believe that this information does not conform in all material respects
     with the disclosure requirements of Items 301, 302, 402 and 503(d),
     respectively, of Regulation S-K;

          (vi) On the basis of limited procedures, not constituting an
     examination in accordance with generally accepted auditing standards,
     consisting of a reading of the unaudited financial statements and other
     information referred to below, a reading of the latest available interim
     financial statements of the Company and its subsidiaries, inspection of the
     minute books of the Company and its subsidiaries since the date of the
     latest audited financial statements included in the Prospectus, inquiries
     of officials of the Company and its subsidiaries responsible for financial
     and accounting matters and such other inquiries and procedures as may be
     specified in such letter, nothing came to their attention that caused them
     to believe that:

               (A) (i) the unaudited consolidated statements of income,
          consolidated balance sheets and consolidated statements of cash flows
          included in the Prospectus do not comply as to form in all material
          respects with the applicable accounting requirements of the Act and
          the related published rules and regulations, or (ii) any material
          modifications should be made to the unaudited condensed consolidated
          statements of income, consolidated balance sheets and consolidated
          statements of cash flows included in the Prospectus for them to be in
          conformity with generally accepted accounting principles;

                    (B) any other unaudited income statement data and balance
          sheet items included in the Prospectus do not agree with the
          corresponding items in the unaudited consolidated financial statements
          from which such data and items were derived, and any such unaudited
          data and items were not determined on a basis substantially consistent
          with the basis for the corresponding amounts in the audited
          consolidated financial statements included in the Prospectus;

                    (C) the unaudited financial statements which were not
          included in the Prospectus but from which were derived any unaudited
          condensed financial statements referred to in Clause (A) and any
          unaudited income statement data and balance sheet items included in
          the Prospectus and referred to in Clause (B) were not determined on a
          basis substantially consistent with the basis for the audited
          consolidated financial statements included in the Prospectus;

                    (D) any unaudited pro forma consolidated condensed financial
          statements included in the Prospectus do not comply as to form in all
          material respects with the applicable accounting requirements of the
          Act and the published rules and regulations thereunder or the pro
          forma adjustments have not been properly applied to the historical
          amounts in the compilation of those statements;

                    (E) as of a specified date not more than five days prior to
          the date of such letter, there have been any changes in the
          consolidated capital stock (other than issuances of capital stock upon
          exercise of options and stock appreciation rights, upon earn-outs of
          
<PAGE>
 
          performance shares and upon conversions of convertible securities, in
          each case which were outstanding on the date of the latest financial
          statements included in the Prospectus) or any increase in the
          consolidated long-term debt of the Company and its subsidiaries, or
          any decreases in consolidated net current assets or stockholders'
          equity or other items specified by the Representatives, or any
          increases in any items specified by the Representatives, in each case
          as compared with amounts shown in the latest balance sheet included in
          the Prospectus, except in each case for changes, increases or
          decreases which the Prospectus discloses have occurred or may occur or
          which are described in such letter; and

                    (F) for the period from the date of the latest financial
          statements included in the Prospectus to the specified date referred
          to in Clause (E) there were any decreases in consolidated net revenues
          or operating profit or the total or per share amounts of consolidated
          net income or other items specified by the Representatives, or any
          increases in any items specified by the Representatives, in each case
          as compared with the comparable period of the preceding year and with
          any other period of corresponding length specified by the
          Representatives, except in each case for decreases or increases which
          the Prospectus discloses have occurred or may occur or which are
          described in such letter; and

          (vii)  In addition to the examination referred to in their report(s)
     included in the Prospectus and the limited procedures, inspection of minute
     books, inquiries and other procedures referred to in paragraphs (iii) and
     (vi) above, they have carried out certain specified procedures, not
     constituting an examination in accordance with generally accepted auditing
     standards, with respect to certain amounts, percentages and financial
     information specified by the Representatives, which are derived from the
     general accounting records of the Company and its subsidiaries, which
     appear in the Prospectus, or in Part II of, or in exhibits and schedules
     to, the Registration Statement specified by the Representatives, and have
     compared certain of such amounts, percentages and financial information
     with the accounting records of the Company and its subsidiaries and have
     found them to be in agreement.
<PAGE>
 
                                                                     ANNEX II(A)

                        FORM OF OPINION OF HALE AND DORR

    Hale and Dorr, counsel for the Company, shall have furnished to you their
  written opinion a draft of such opinion is attached as Annex II(a) hereto),
 dated such Time of Delivery, in form and substance satisfactory to you, to the
                                  effect that:

     (i) The Company has been duly incorporated and is validly existing as a
corporation in good standing under the laws of the State of Delaware, with full
corporate power and authority to own its properties and conduct its business as
                          described in the Prospectus;

      (ii) The Company has an authorized capitalization as set forth in the
    Prospectus, and all of the issued shares of capital stock of the Company
 (including the Shares being delivered at such Time of Delivery) have been duly
and validly authorized and issued and are fully paid and non-assessable; and the
Shares conform to the description of the Stock contained in the Prospectus under
                  the caption "Description of Capital Stock";

   (iii)   The Company has been duly qualified as a foreign corporation for the
     transaction of business and is in good standing under the laws of the
  Commonwealth of Massachusetts, which to such counsel's knowledge is the only
jurisdiction in which the Company owns or leases property or maintains an office
 (such counsel being entitled to rely in respect of the opinion in this clause
   relating to matters of fact upon certificates of officers of the Company,
provided that such counsel shall state that they believe that both you and they
         are justified in relying upon such opinions and certificates);

       (iv) To such counsel's knowledge and other than as set forth in the
Prospectus, there are no legal or governmental proceedings pending to which the
 Company is a party or of which any property of the Company is the subject and,
to such counsel's knowledge, no such proceedings are threatened or contemplated
              by governmental authorities or threatened by others;

  (v) This Agreement and the International Underwriting Agreement have been duly
               authorized, executed and delivered by the Company;

  (vi) The issue and sale of the Shares being delivered at such Time of Delivery
  to be sold by the Company and the compliance by the Company with all of the
 provisions of this Agreement and the International Underwriting Agreement and
 the consummation of the transactions herein and therein contemplated will not
    conflict with or result in a breach or violation of any of the terms or
provisions of, or constitute a default under, any agreement or instrument filed
as an exhibit to the Registration Statement, including any indenture, mortgage,
deed of trust, loan agreement, registration rights agreement, warrant agreement,
investors' rights agreement, license agreement, research agreement, distribution
agreement, or other agreement or instrument to which the Company is a party or
<PAGE>
 
by which the Company is bound or to which any of the property or assets of the
Company is subject, nor will such action result in any violation of the
provisions of the Certificate of Incorporation or By-laws of the Company or any
statute or any order, rule or regulation known to such counsel of any court or
governmental agency or body having jurisdiction over the Company or any of its
properties;

       (vii)   No consent, approval, authorization, order, registration or
qualification of or with any such court or governmental agency or body is
required for the issue and sale of the Shares or the consummation by the Company
of the transactions contemplated by this Agreement and the International
Underwriting Agreement, except the registration under the Act of the Shares, and
such consents, approvals, authorizations, registrations or qualifications as may
be required under state or foreign securities or Blue Sky laws in connection
with the purchase and distribution of the Shares by the Underwriters and the
International Underwriters or under the rules of the National Association of
Securities Dealers, Inc.;

    (viii)  Each of the MIT License Agreements is in full force and effect and
constitutes a valid and binding agreement between the parties thereto,
enforceable in accordance with its terms, subject as to enforcement to
bankruptcy, insolvency, reorganization and other laws of general applicability
relating to or affecting creditors' rights and to general equity principles; and
the statements in the Prospectus under the captions "Risk Factors-Dependence on
Licenses" and "Business-Patents, Trade Secrets and Proprietary Rights", insofar
as they purport to describe the provisions of the MIT License Agreements, are
accurate, complete and fair summaries thereof in all material respects;

    (ix) The statements set forth in the Prospectus under the caption "Shares
Eligible for Future Sale", insofar as such statements purport to describe the
provisions of the laws and documents referred to therein, are accurate, complete
and fair summaries thereof in all material respects;

    (x) The statements set forth in the Prospectus under the caption
"Description of Capital Stock", insofar as they purport to constitute a summary
of the terms of the Stock and the laws and documents referred to therein, and
under the captions "Underwriting" [and "Certain U.S. Federal Tax Considerations
for Non-U.S. Holders"], insofar as they purport to describe the provisions of
the laws and documents referred to therein, are accurate, complete and fair
summaries of such terms and provisions in all material respects;

    (xi) The Company is not an "investment company" or an entity "controlled" by
an "investment company", as such terms are defined in the Investment Company
Act; and

    (xii)  The Registration Statement and the Prospectus and any further
amendments and supplements thereto made by the Company prior to such Time of
Delivery (other than the financial statements, related schedules or other
financial data therein, as to which such counsel need express no opinion) comply
<PAGE>
 
as to form in all material respects with the requirements of the Act and the
rules and regulations thereunder; and they do not know of any amendment to the
Registration Statement required to be filed or of any contracts or other
documents of a character required to be filed as an exhibit to the Registration
Statement or required to be described in the Registration Statement or the
Prospectus which are not filed or described as required.

    In addition to the matters set forth above, such counsel shall also
include a statement to the following effect: in connection with the preparation
of the Registration Statement and the Prospectus, such counsel has participated
in conferences with officers and representatives of the Company and the
independent accountants of the Company, at which conferences such counsel has
made inquiries of such persons and others and discussed the contents of the
Registration Statement and the Prospectus and has reviewed the Company's
Certificate of Incorporation and Bylaws. While the limitations inherent in the
independent verification of factual matters and the character of determinations
involved in the registration process are such that such counsel is not passing
upon and does not assume any responsibility for the accuracy, completeness or
fairness of the statements contained in the Registration Statement or the
Prospectus (except as specifically referred to in subsections (viii), (ix) and
(x) of this Section 7(c)), nothing has come to such counsel's attention which
has caused them to believe that the Registration Statement, as of its effective
date, contained any untrue statement of a material fact or omitted to state any
material fact required to be stated therein or necessary in order to make the
statements therein not misleading (except that such counsel need not express
such statement with respect to the financial statements, related schedules or
other financial data included in the Registration Statement), and nothing has
come to such counsel's attention which has caused such counsel to believe that
the Prospectus, as of its date or at such Time of Delivery, contained any untrue
statement of a material fact or omitted to state any material fact necessary in
order to make the statements therein, in light of the circumstances under which
they were made, not misleading (except that such counsel need not express such
statement with respect to the financial statements, related schedules or other
financial data included in the Prospectus).

    In rendering such opinion, such counsel may state that they express no
opinion as to the laws of any jurisdiction outside the United States and may, as
to questions of law not involving the laws of the United States, the
Commonwealth of Massachusetts, [the State of New York] or the Delaware General
Corporation Law, assume, without independent inquiry, that such laws are the
same as those of the Commonwealth of Massachusetts;
<PAGE>
 
                                                                     ANNEX II(B)

       FORM OF OPINION OF HALE AND DORR, COUNSEL FOR SELLING STOCKHOLDERS

     Hale and Dorr, as special counsel for [each][certain] of the Selling
Stockholders, as indicated in Schedule II hereto, shall have furnished to you
its written opinion with respect to each of the Selling Stockholders for whom it
is acting as counsel, dated such Time of Delivery, in form and substance
satisfactory to you, to the effect that:

               (i) A Power of Attorney and a Custody Agreement have been duly
          executed and delivered by such Selling Stockholder and constitute
          valid and binding agreements of such Selling Stockholder in accordance
          with their terms;

               (ii) This Agreement has been duly executed and delivered by or on
          behalf of each of the Selling Stockholders, and the Custody Agreement
          between each Selling Stockholder and the Custodian and the Power of
          Attorney referred to in such Custody Agreement have been duly executed
          and delivered by each of the Selling Stockholders;
 
               (iii)  Upon registration of the Firm Shares to be sold by the
          Selling Stockholders hereunder in the names of the Underwriters in
          the stock records of the Company, and assuming the Underwriters
          purchased such stock in good faith and without notice of any adverse
          claim within the meaning of Section 8-302 of the Uniform Commercial
          Code as in effect in the Commonwealth of Massachusetts, the
          Underwriters will have acquired all rights of the Selling Stockholders
          in such Firm Shares free and clear of any adverse claim, any lien in
          favor of the Company and any restrictions on transfer imposed by the
          Company; and

               (iv) Based insofar as factual matters are concerned solely upon
          representations and warranties of the Company and Selling Stockholders
          included in the Custody Agreement and Power of Attorney, no consent,
          approval, authorization or order of any court or governmental agency
          or body is required for the consummation by the Company and the
          Selling Stockholders of the transactions contemplated by the
          Underwriting Agreement, except such as have been obtained or made and
          are in full force and effect and such as may be required by the NASD,
          or by State securities and Blue Sky laws, as to which such counsel
          need express no opinion.

          In rendering such opinion, such counsel may state that it expresses no
     opinion as to the laws of any jurisdiction outside the United States and
     may, as to questions of law not involving the laws of the United States,
     the Commonwealth of Massachusetts, [the State of New York] or the Delaware
     General Corporation Law, assume, without independent inquiry, that such
     laws are the same as those of the Commonwealth of Massachusetts; and in
     rendering the opinion in subparagraph (iv) such counsel may rely upon the
     representations and warranties of such Selling Stockholder in respect of
     matters of fact, provided that such counsel shall state that it believes
     that both you and it are justified in relying upon such representations and
     warranties;
<PAGE>
 
                                                                     ANNEX II(C)

                   FORM OF OPINION OF CHOATE, HALL & STEWART

 
<PAGE>
 
                                                                     ANNEX II(D)

                      FORM OF OPINION OF FISH & RICHARDSON

 
<PAGE>
 
                                                                     ANNEX II(E)

                       FORM OF OPINION OF KING & SPALDING

     King & Spalding, regulatory counsel for the Company, shall have furnished
to you their written opinion dated such Time of Delivery, in form and substance
satisfactory to you to the effect that it has examined the Registration
Statement and the Exhibits thereto and;
 
               (i) The statements under the caption "Risk Factors-Government
          Regulation; Future Product Approvals Uncertain" and "Business-
          Government Regulation" in the Prospectus, are, in all material
          respects, accurate and fair statements or summaries of applicable
          federal law and regulation as applied by the FDA, subject to the
          qualifications set forth therein;

               (ii) No facts have come to the attention of such counsel that
          lead it to believe that the information contained under the captions
          "Risk Factors-Government Regulation; Future Product Approvals
          Uncertain" and "Business-Government Regulation" (a) in the
          Registration Statement, at the time the Registration Statement became
          effective, contained any untrue statement of a material fact, or
          omitted to state any material fact required to be stated therein or
          necessary to make the statements therein not misleading, or (b) in the
          Prospectus, at the time the Prospectus was issued or at the date
          hereof, contained any untrue statement of a material fact, or omitted
          to state any material fact required to be stated therein or necessary
          to make the statements therein, in light of the circumstances under
          which they were made, not misleading; and

               (iii)  Such counsel has no actual knowledge of any action, suit
          or proceeding pending or threatened by the FDA against the Company
          seeking limitation, suspension, or revocation of any license, permit,
          approval or authorization required by the Company to conduct its
          business as described in the Registration Statement and the
          Prospectus.

<PAGE>
 
                                                                     Exhibit 1.2

                             CAMBRIDGE HEART, INC.
                                  COMMON STOCK
                          (PAR VALUE $.001 PER SHARE)


                             UNDERWRITING AGREEMENT
                            (INTERNATIONAL VERSION)


                                                                          , 1996
Goldman Sachs International,
Bear, Stearns International Limited,
 As representatives of the several Underwriters
 named in Schedule I hereto,
c/o Goldman Sachs International,
Peterborough Court,
133 Fleet Street,
London EC4A 2BB, England.


Ladies and Gentlemen:

     Cambridge Heart, Inc., a Delaware corporation (the "Company"), proposes,
subject to the terms and conditions stated herein, to issue and sell to the
Underwriters named in Schedule I hereto (the "Underwriters") an aggregate of
600,000 shares and, at the election of the Underwriters, up to 90,000 additional
shares of the Common Stock, par value $.001 per share (the "Stock"), of the
Company.  The aggregate of 600,000 shares to be sold by the Company is herein
called the "Firm Shares" and the aggregate of 90,000 additional shares to be
sold by the Company is herein called the "Optional Shares".  The Firm Shares and
the Optional Shares which the Underwriters elect to purchase pursuant to Section
2 hereof are herein collectively called, the "Shares".

     It is understood and agreed to by all parties that the Company is
concurrently entering into an agreement, a copy of which is attached hereto (the
"U.S. Underwriting Agreement"), providing for the offering by the Company and
certain stockholders of the Company named in Schedule II thereto of up to a
total of 2,992,900 shares of Stock (the "U.S. Shares") including the
overallotment option thereunder through arrangements with certain underwriters
in the United States (the "U.S. Underwriters"), for whom Goldman, Sachs & Co.
and Bear, Stearns & Co. Inc. are acting as representatives.  Anything herein and
therein to the contrary notwithstanding, the respective closings under this
Agreement and the U.S. Underwriting Agreement are hereby expressly made
conditional on one another.  The Underwriters hereunder and the U.S.
Underwriters are simultaneously entering into an Agreement between U.S. and
International Underwriting Syndicates (the "Agreement between Syndicates") which
provides, among other things, for the transfer of shares of Stock between the
two syndicates and for consultation by the Lead Managers hereunder with Goldman,
Sachs & Co. prior to exercising the rights of the Underwriters under Section 7
hereof.  Two forms of prospectus are to be used in connection with the offering
<PAGE>
 
and sale of shares of Stock contemplated by the foregoing, one relating to the
Shares hereunder and the other relating to the U.S. Shares.  The latter form of
prospectus will be identical to the former except for certain substitute pages.
Except as used in Sections 2, 3, 4, 9 and 11 herein, and except as the context
may otherwise require, references hereinafter to the Shares shall include all of
the shares of Stock which may be sold pursuant to either this Agreement or the
U.S. Underwriting Agreement, and references herein to any prospectus whether in
preliminary or final form, and whether as amended or supplemented, shall include
both of the U.S. and the international versions thereof.

     In addition, this Agreement incorporates by reference certain provisions
from the U.S. Underwriting Agreement (including the related definitions of
terms, which are also used elsewhere herein) and, for purposes of applying the
same, references (whether in these precise words or their equivalent) in the
incorporated provisions to the "Underwriters" shall be to the Underwriters
hereunder, to the "Shares" shall be to the Shares hereunder as just defined, to
"this Agreement" (meaning therein the U.S. Underwriting Agreement) shall be to
this Agreement (except where this Agreement is already referred to or as the
context may otherwise require) and to the representatives of the Underwriters or
to Goldman, Sachs & Co. shall be to the addressees of this Agreement and to
Goldman Sachs International ("GSI"), and, in general, all such provisions and
defined terms shall be applied mutatis mutandis as if the incorporated
provisions were set forth in full herein having regard to their context in this
Agreement as opposed to the U.S. Underwriting Agreement.

     1.  The Company hereby makes with the Underwriters the same
representations, warranties and agreements as are set forth in Section 1 of the
U.S. Underwriting Agreement, which Section is incorporated herein by this
reference.

     2.  Subject to the terms and conditions herein set forth, (a) the Company
agrees to issue and sell to each of the Underwriters, and each of the
Underwriters agrees, severally and not jointly, to purchase from the Company, at
a purchase price per share of $......, 600,000 Firm Shares  (to be adjusted by
you so as to eliminate fractional shares) determined by multiplying the
aggregate number of Firm Shares to be sold by the Company by a fraction, the
numerator of which is the aggregate number of Firm Shares to be purchased by
such Underwriter as set forth opposite the name of such Underwriter in Schedule
I hereto and the denominator of which is the aggregate number of Firm Shares to
be purchased by all the Underwriters from the Company hereunder and (b) in the
event and to the extent that the Underwriters shall exercise the election to
purchase Optional Shares as provided below, the Company agrees to sell to each
of the Underwriters, and each of the Underwriters agrees, severally and not
jointly, to purchase from the Company, at the purchase price per share set forth
in clause (a) of this Section 2, that portion of the number of Optional Shares
as to which such election shall have been exercised (to be adjusted by you so as
to eliminate fractional shares) determined by multiplying such number of
Optional Shares by a fraction the numerator of which is the maximum number of
Optional Shares which such Underwriter is entitled to purchase as set forth
opposite the name of such Underwriter in Schedule I hereto and the denominator
of which is the maximum number of Optional Shares that all of the Underwriters
are entitled to purchase hereunder.

     The Company hereby grants to the Underwriters the right to purchase at
their election up to 90,000 Optional Shares, at the purchase price per share set
forth in the paragraph above, for the sole purpose of covering overallotments in




                                       2
<PAGE>
 
the sale of the Firm Shares.  Any such election to purchase Optional Shares may
be exercised only by written notice from you to the Company, given within a
period of 30 calendar days after the date of this Agreement, setting forth the
aggregate number of Optional Shares to be purchased and the date on which such
Optional Shares are to be delivered, as determined by you but in no event
earlier than the First Time of Delivery (as defined in Section 4 hereof) or,
unless you and the Company agree in writing, earlier than two or later than ten
business days after the date of such notice.

     3.  Upon the authorization by GSI of the release of the Firm Shares, the
several Underwriters propose to offer the Firm Shares for sale upon the terms
and conditions set forth in the Prospectus and in the forms of Agreement among
Underwriters (International Version) and Selling Agreements, which have been
previously submitted to the Company by you.  Each Underwriter hereby makes to
and with the Company the representations and agreements of such Underwriter as a
member of the selling group contained in Sections 3(d) and 3(e) of the form of
Selling Agreements.

     4.  (a)  The Shares to be purchased by each Underwriter hereunder, in
definitive form, and in such authorized denominations and registered in such
names as GSI may request upon at least 48 hours' prior notice to the Company
shall be delivered by or on behalf of the Company to GSI for the account of such
Underwriter, against payment by or on behalf of such Underwriter of the purchase
price therefor by wire transfer or by certified or official bank check or
checks, payable to the order of the Company in Federal (same day) funds.  The
Company will cause the certificates representing the Shares to be made available
for checking and packaging at least 24 hours prior to the Time of Delivery (as
defined below) with respect thereto at the office of Goldman, Sachs & Co, 85
Broad Street, New York, New York 10004 (the "Designated Office").  The time and
date of such delivery and payment shall be, with respect to the Firm Shares,
9:30 a.m., New York City time, on ............., 1996 or such other time and
date as Goldman, Sachs & Co. and the Company may agree upon in writing, and,
with respect to the Optional Shares, 9:30 a.m., New York City time, on the date
specified by GSI in the written notice given by GSI of the Underwriters'
election to purchase such Optional Shares, or such other time and date as GSI
and the Company may agree upon in writing.  Such time and date for delivery of
the Firm Shares is herein called the "First Time of Delivery", such time and
date for delivery of the Optional Shares, if not the First Time of Delivery, is
herein called the "Second Time of Delivery", and each such time and date for
delivery is herein called a "Time of Delivery".

     (b) The documents to be delivered at each Time of Delivery by or on behalf
of the parties hereto pursuant to Section 7 of the U.S. Underwriting Agreement,
including the cross receipt for the Shares and any additional documents
requested by the Underwriters pursuant to Section 7(k) of the U.S. Underwriting
Agreement, will be delivered at the offices of Hale and Dorr, 60 State Street,
Boston, Massachusetts  02109 (the "Closing Location"), and the Shares will be
delivered at the Designated Office, all at such Time of Delivery.  A meeting
will be held at the Closing Location at 1:00 p.m., New York City time, on the
New York Business Day next preceding each Time of Delivery, at which meeting the
final drafts of the documents to be delivered pursuant to the preceding sentence
will be available for review by the parties hereto.  For the purposes of this
Section 4, "New York Business Day" shall mean each Monday, Tuesday, Wednesday,
Thursday and Friday which is not a day on which banking institutions in New York
are generally authorized or obligated by law or executive order to close.




                                       3
<PAGE>
 
     5.  The Company hereby makes to the Underwriters the same agreements as are
set forth in Section 5 of the U.S. Underwriting Agreement, which Section is
incorporated herein by this reference.

     6.  The Company and the Underwriters hereby agree with respect to certain
expenses on the same terms as are set forth in Section 6 of the U.S.
Underwriting Agreement, which Section is incorporated herein by this reference.

     7.  Subject to the provisions of the Agreement between Syndicates, the
obligations of the Underwriters hereunder shall be subject, in their discretion,
at each Time of Delivery, to the condition that all representations and
warranties and other statements of the Company herein are, at and as of such
Time of Delivery, true and correct, the condition that the Company shall have
performed all of their respective obligations hereunder theretofore to be
performed, and additional conditions identical to those set forth in Section 7
of the U.S. Underwriting Agreement, which Section is incorporated herein by this
reference.

     8.  (a)  The Company will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (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 Preliminary Prospectus, the Registration
Statement or the Prospectus, 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, and will reimburse each Underwriter for any legal or
other expenses reasonably incurred by such Underwriter in connection with
investigating or defending any such action or claim as such expenses are
incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Prospectus, the Registration Statement
or the Prospectus or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
through GSI expressly for use therein.

     (b) Each Underwriter will indemnify and hold harmless the Company against
any losses, claims, damages or liabilities to which the Company may become
subject, under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (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
Preliminary Prospectus, the Registration Statement or the Prospectus, 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, in each case
to the extent, but only to the extent, that such untrue statement or alleged
untrue statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or Prospectus or any such amendment or
supplement in reliance upon and in conformity with written information furnished
to the Company by such Underwriter through GSI expressly for use therein; and
will reimburse the Company for any legal or other expenses reasonably incurred
by the Company in connection with investigating or defending any such action or
claim as such expenses are incurred.




                                       4
<PAGE>
 
     (c) Promptly after receipt by an indemnified party under subsection (a) or
(b) above of notice of the commencement of any action, such indemnified party
shall, if a claim in respect thereof is to be made against the indemnifying
party under such subsection, notify the indemnifying party in writing of the
commencement thereof; but the omission so to notify the indemnifying party shall
not relieve it from any liability which it may have to any indemnified party
otherwise than under such subsection.  In case any such action shall be brought
against any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate
therein and, to the extent that it shall wish, jointly with any other
indemnifying party similarly notified, to assume the defense thereof, with
counsel satisfactory to such indemnified party (who shall not, except with the
consent of the indemnified party, be counsel to the indemnifying party), and,
after notice from the indemnifying party to such indemnified party of its
election so to assume the defense thereof, the indemnifying party shall not be
liable to such indemnified party under such subsection for any legal expenses of
other counsel or any other expenses, in each case subsequently incurred by such
indemnified party, in connection with the defense thereof other than reasonable
costs of investigation.  No indemnifying party shall, without the written
consent of the indemnified party, effect the settlement or compromise of, or
consent to the entry of any judgment with respect to, any pending or threatened
action or claim in respect of which indemnification or contribution may be
sought hereunder (whether or not the indemnified party is an actual or potential
party to such action or claim) unless such settlement, compromise or judgment
(i) includes an unconditional release of the indemnified party from all
liability arising out of such action or claim and (ii) does not include a
statement as to or an admission of fault, culpability or a failure to act, by or
on behalf of any indemnified party.

     (d) If the indemnification provided for in this Section 8 is unavailable to
or insufficient to hold harmless an indemnified party under subsection (a) or
(b) above in respect of any losses, claims, damages or liabilities (or actions
in respect thereof) referred to therein, then each indemnifying party shall
contribute to the amount paid or payable by such indemnified party as a result
of such losses, claims, damages or liabilities (or actions in respect thereof)
in such proportion as is appropriate to reflect the relative benefits received
by the Company on the one hand and the Underwriters on the other from the
offering of the Shares.  If, however, the allocation provided by the immediately
preceding sentence is not permitted by applicable law or if the indemnified
party failed to give the notice required under subsection (c) above, then each
indemnifying party shall contribute to such amount paid or payable by such
indemnified party in such proportion as is appropriate to reflect not only such
relative benefits but also the relative fault of the Company on the one hand and
the Underwriters on the other in connection with the statements or omissions
which resulted in such losses, claims, damages or liabilities (or actions in
respect thereof), as well as any other relevant equitable considerations.  The
relative benefits received by the Company on the one hand and the Underwriters
on the other shall be deemed to be in the same proportion as the total net
proceeds from the offering of the Shares purchased under this Agreement (before
deducting expenses) received by the Company bear to the total underwriting
discounts and commissions received by the Underwriters with respect to the
Shares purchased under this Agreement, in each case as set forth in the table on
the cover page of the Prospectus relating to such Shares. The relative fault
shall be determined by reference to, among other things, whether the untrue or
alleged untrue statement of a material fact or the omission or alleged omission
to state a material fact relates to information supplied by the Company on the
one hand or the Underwriters on the other and the parties' relative intent,




                                       5
<PAGE>
 
knowledge, access to information and opportunity to correct or prevent such
statement or omission.  The Company and the Underwriters agree that it would not
be just and equitable if contributions pursuant to this subsection (d) were
determined by pro rata allocation (even if the Underwriters were treated as one
entity for such purpose) or by any other method of allocation which does not
take account of the equitable considerations referred to above in this
subsection (d).  The amount paid or payable by an indemnified party as a result
of the losses, claims, damages or liabilities (or actions in respect thereof)
referred to above in this subsection (d) shall be deemed to include any legal or
other expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim.  Notwithstanding the
provisions of this subsection (d), no Underwriter shall be required to
contribute any amount in excess of the amount by which the total price at which
the Shares underwritten by it and distributed to the public were offered to the
public exceeds the amount of any damages which such Underwriter has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission.  No person guilty of fraudulent misrepresentation
(within the meaning of Section 11(f) of the Act) shall be entitled to
contribution from any person who was not guilty of such fraudulent
misrepresentation. The Underwriters' obligations in this subsection (d) to
contribute are several in proportion to their respective underwriting
obligations and not joint.

     (e) The obligations of the Company under this Section 8 shall be in
addition to any liability which the Company may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Act; and the obligations of the
Underwriters under this Section 8 shall be in addition to any liability which
the respective Underwriters may otherwise have and shall extend, upon the same
terms and conditions, to each officer and director of the Company and to each
person, if any, who controls the Company within the meaning of the Act.

     9.  (a)  If any Underwriter shall default in its obligation to purchase the
Shares which it has agreed to purchase hereunder at a Time of Delivery, you may
in your discretion arrange for you or another party or other parties to purchase
such Shares on the terms contained herein.  If within 36 hours after such
default by any Underwriter you do not arrange for the purchase of such Shares,
then the Company shall be entitled to a further period of thirty-six hours
within which to procure another party or other parties satisfactory to you to
purchase such Shares on such terms. In the event that, within the respective
prescribed periods, you notify the Company that you have so arranged for the
purchase of such Shares, or the Company notifies you that they have so arranged
for the purchase of such Shares, you or the Company shall have the right to
postpone such Time of Delivery for a period of not more than seven days, in
order to effect whatever changes may thereby be made necessary in the
Registration Statement or the Prospectus, or in any other documents or
arrangements, and the Company agrees to file promptly any amendments to the
Registration Statement or the Prospectus which in your opinion may thereby be
made necessary.  The term "Underwriter" as used in this Agreement shall include
any person substituted under this Section with like effect as if such person had
originally been a party to this Agreement with respect to such Shares.

     (b) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company as
provided in subsection (a) above, the aggregate number of such Shares which




                                       6
<PAGE>
 
remains unpurchased does not exceed one-eleventh of the aggregate number of all
the Shares to be purchased at such Time of Delivery, then the Company shall have
the right to require each non-defaulting Underwriter to purchase the number of
shares which such Underwriter agreed to purchase hereunder at such Time of
Delivery and, in addition, to require each non-defaulting Underwriter to
purchase its pro rata share (based on the number of Shares which such
Underwriter agreed to purchase hereunder) of the Shares of such defaulting
Underwriter or Underwriters for which such arrangements have not been made; but
nothing herein shall relieve a defaulting Underwriter from liability for its
default.

     (c) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company as
provided in subsection (a) above, the aggregate number of such Shares which
remains unpurchased exceeds one-eleventh of the aggregate number of all the
Shares to be purchased at such Time of Delivery, or if the Company shall not
exercise the right described in subsection (b) above to require non-defaulting
Underwriters to purchase Shares of a defaulting Underwriter or Underwriters,
then this Agreement (or, with respect to the Second Time of Delivery, the
obligation of the Underwriters to purchase and of the Company to sell the
Optional Shares) shall thereupon terminate, without liability on the part of any
non-defaulting Underwriter or the Company, except for the expenses to be borne
by the Company and the Underwriters as provided in Section 6 hereof and the
indemnity and contribution agreements in Section 8 hereof; but nothing herein
shall relieve a defaulting Underwriter from liability for its default.

     10.  The respective indemnities, agreements, representations, warranties
and other statements of the Company and the several Underwriters, as set forth
in this Agreement or made by or on behalf of them, respectively, pursuant to
this Agreement, shall remain in full force and effect, regardless of any
investigation (or any statement as to the results thereof) made by or on behalf
of any Underwriter or any controlling person of any Underwriter, or the Company
or any officer or director or controlling person of the Company, and shall
survive delivery of and payment for the Shares.

     Anything herein to the contrary notwithstanding, the indemnity agreement of
the Company in subsection (a) of Section 8 hereof, the representations and
warranties in subsections (a)(ii) and (a)(iii) of Section 1 of the U.S.
Underwriting Agreement incorporated by reference herein and any representation
or warranty as to the accuracy of the Registration Statement or the Prospectus
contained in any certificate furnished by the Company pursuant to Section 7
hereof, insofar as they may constitute a basis for indemnification for
liabilities (other than payment by the Company of expenses incurred or paid in
the successful defense of any action, suit or proceeding) arising under the Act,
shall not extend to the extent of any interest therein of a controlling person
or partner of an Underwriter who is a director, officer or controlling person of
the Company when the Registration Statement has become effective, except in each
case to the extent that an interest of such character shall have been determined
by a court of appropriate jurisdiction as not against public policy as expressed
in the Act. Unless in the opinion of counsel for the Company the matter has been
settled by controlling precedent, the Company will, if a claim for such
indemnification is asserted, submit to a court of appropriate jurisdiction the
question whether such interest is against public policy as expressed in the Act
and will be governed by the final adjudication of such issue.





                                       7
<PAGE>
 
     11.  If this Agreement shall be terminated pursuant to Section 9 hereof,
the Company shall not be under any liability to any Underwriter except as
provided in Section 6 and Section 8 hereof, but, if for any other reason any
Shares are not delivered by or on behalf of the Company as provided herein, the
Company will reimburse the Underwriters through GSI for all out-of-pocket
expenses approved in writing by GSI, including fees and disbursements of
counsel, reasonably incurred by the Underwriters in making preparations for the
purchase, sale and delivery of the Shares not so delivered, but the Company
shall then be under no further liability to any Underwriter in respect of the
Shares not so delivered except as provided in Sections 6 and 8 hereof.

     12.  In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you jointly or by GSI.

     All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to the Underwriters in care of GSI, Peterborough Court,
133 Fleet Street, London EC4A 2BB, England, Attention: Equity Capital Markets,
Telex No. 94012165, facsimile transmission No. (071) 774-1550; and if to the
Company shall be delivered or sent by registered mail, telex or facsimile
transmission to the address of the Company set forth in the Registration
Statement, Attention: Secretary; provided, however, that any notice to an
Underwriter pursuant to Section 8(c) hereof shall be delivered or sent by mail,
telex or facsimile transmission to such Underwriter at its address set forth in
its Underwriters' Questionnaire, or telex constituting such Questionnaire, which
address will be supplied to the Company by GSI upon request.  Any such
statements, requests, notices or agreements shall take effect upon receipt
thereof.

     13.  This Agreement shall be binding upon, and inure solely to the benefit
of, the Underwriters and the Company and, to the extent provided in Sections 8
and 10 hereof, the officers and directors of the Company and each person who
controls the Company or any Underwriter, and their respective heirs, executors,
administrators, successors and assigns, and no other person shall acquire or
have any right under or by virtue of this Agreement.  No purchaser of any of the
Shares from any Underwriter shall be deemed a successor or assign by reason
merely of such purchase.

     14.  Time shall be of the essence of this Agreement.

     15.  THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK, UNITED STATES OF AMERICA.

     16.  This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.

     If the foregoing is in accordance with your understanding, please sign and
return to us eight (8) counterparts hereof, and upon the acceptance hereof by
you, on behalf of each of the Underwriters, this letter and such acceptance
hereof shall constitute a binding agreement among each of the Underwriters and
the Company.  It is understood that your acceptance of this letter on behalf of




                                       8
<PAGE>
 
each of the Underwriters is pursuant to the authority set forth in a form of
Agreement among Underwriters (International Version), the form of which shall be
furnished to the Company  for examination upon request, but without warranty on
your part as to the authority of the signers thereof.

                                    Very truly yours,
                                    Cambridge Heart, Inc.

                                    By:_______________________________
                                       Name:
                                       Title:




Accepted as of the date hereof:

Goldman Sachs International
Bear, Stearns International Limited

By:  Goldman Sachs International


By:_________________________________
          (Attorney-in-Fact)


 
   On behalf of each of the Underwriters



                                       9
<PAGE>
 
                                   SCHEDULE I
<TABLE>
<CAPTION>
 
 
                                                          Number of Optional
                                                        Shares to be Purchased
                               Total Number of Firm        if Maximum Option
      Underwriter             Shares to be Purchased          Exercised
- -----------------------      ------------------------    ---------------------

<S>                          <C>                        <C>
Goldman Sachs International
Bear, Stearns
 International Limited
                                     -------                  ------  
   Total                             600,000                  90,000
                                     =======                  ======
 
</TABLE>




                                      10

<PAGE>

                                                                     Exhibit 4.1

FBU
                              [LOGO APPEARS HERE]
 
<TABLE> 
<CAPTION> 
                                                       CAMBRIDGE HEART, INC.


<S>                                 <C>                                                     <C> 
THIS CERTIFICATE IS TRANSFERABLE    INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE    SEE REVERSE FOR STATEMENTS RELATING
 IN BOSTON, MA OR NEW YORK, NY                                                                   TO RIGHTS, PREFERENCES,
                                                                                            PRIVILEGES AND RESTRICTIONS, IF ANY
This Certifies that                                                  
                                                                                                     CUSIP 131910 10 1
                                                                                   

                                                             SPECIMEN

is the record holder of 

                           FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK, $.001 PAR VALUE, OF

                 ------------------------------------                         ------------------------------------ 
- -----------------------------------------------------  CAMBRIDGE HEART, INC.  ------------------------------------------------------
                 ------------------------------------                         ------------------------------------         

Herein designated "the Corporation", transferable on the share register of the Corporation upon surrender of this Certificate
properly endorsed. By the acceptance of this certificate the holder hereof consents to and agrees to be bound by all of the
provisions of the Restated Certificate of Incorporation and the Bylaws of the Corporation and all amendments thereto. This
Certificate is not valid until countersigned by the Transfer Agent and registered by the Registrar.
    WITNESS the facsimile seal of the Corporation and the facsimile signature of its duly authorized officers. 

Dated

 /s/ SIGNATURE APPEARS HERE                                                                       /s/ SIGNATURE APPEARS HERE
         SPECIMEN                                  [SEAL APPEARS HERE]                                     SPECIMEN
        Secretary                                                                             PRESIDENT AND CHIEF EXECUTIVE OFFICER



 COUNTERSIGNED AND REGISTERED:

      TRANSFER AGENT AND REGISTRAR

 BY /s/ SIGNATURE APPEARS HERE   
            SPECIMEN

               AUTHORIZED SIGNATURE

</TABLE> 
<PAGE>
 
                              CAMBRIDGE HEART, INC.
     The Corporation is authorized to issue two classes of stock, Common and
Preferred Stock. The Board of Directors of the Corporation has authority to fix
the number of shares and the designation of any series of Preferred Stock and to
determine or alter the rights, preferences, privileges and restrictions granted
to or imposed upon any unissued series of Preferred Stock.
     A statement of the rights, preferences, privileges and restrictions granted
to or imposed upon the respective classes or series of shares and upon the 
holders thereof as established, from time to time, by the Restated Certificate
of Incorporation of the Corporation and by any certificate of designations, and
the number of shares constituting each class and series and the designations
thereof, may be obtained by the holder hereof upon written request and without
charge from the Corporation at its office in Bedford, Massachusetts.

     The following abbreviations, when used in the inscription on the face of 
this certificate, shall be construed as though they were written out in full 
according to applicable laws or regulations:

TEN COM -- as tenants in common
TEN ENT -- as tenants by the entireties
JT TEN  -- as joint tenants with right of survivorship and not as tenants in 
           common

UNIF GIFT MIN ACT -- ____________________  Custodian ____________________
                            (Cust)                         (Minor)
                     under Uniform Gifts to Minors
                     Act ________________________________________________
                                              (State)

UNIF TRF MIN ACT  -- ____________________  Custodian (until age ________)
                            (Cust)
                     ____________________  under Uniform Transfers
                           (Minor)
                     to Minors Act ______________________________________
                                                   (State)

      Additional abbreviations may be used though not in the above list.



     FOR VALUE RECEIVED, ________________________ hereby sell, assign and 
     transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
    IDENTIFYING NUMBER OF ASSIGNEE
- --------------------------------------

- --------------------------------------

- --------------------------------------------------------------------------------
 (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________Shares

of the Common Stock represented by the within Certificate, and do hereby 
irrevocably constitute and appoint

_______________________________________________________________________Attorney
to transfer the said stock on the books of the within named Corporation with 
full power of substitution in the premises.


Dated ________________________________


                             X _________________________________________________


                             X _________________________________________________
                               THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
                       NOTICE: CORRESPOND WITH THE NAME(S) AS WRITTEN UPON THE
                               FACE OF THE CERTIFICATE IN EVERY PARTICULAR
                               WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE
                               WHATEVER.

Signature(s) Guaranteed





By__________________________________________________
THE SIGNATURES SHOULD BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS
AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBER-
SHIP IN AN APPROVED SIGNATURE GUARANTEE MEDALLION
PROGRAM). PURSUANT TO S.E.C. RULE 17A6-15



© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission