RAYTEL MEDICAL CORP
8-K, 1996-10-03
MISC HEALTH & ALLIED SERVICES, NEC
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<PAGE>   1
                        SECURITIES AND EXCHANGE COMMISSION

                              Washington, D.C. 20549

                                     FORM 8-K

                                  CURRENT REPORT

     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest reported)      October 3, 1996

                             Raytel Medical Corporation
- --------------------------------------------------------------------------------
                (Exact name of registrant as specified in charter)

        Delaware                      0-27186                   94-2787342
- --------------------------------------------------------------------------------
(State or other jurisdiction        (Commission              (IRS Employer
      of incorporation)             File Number)             Identification No.)

                 2755 Campus Drive, Suite 200, San Mateo, CA 94403
- --------------------------------------------------------------------------------
(Address of principal executive offices)                              (Zip Code)

Registrant's telephone number, including area code (415) 349-0800


- --------------------------------------------------------------------------------
        (Former name or former address, if changed since last report)


<PAGE>   2
ITEM 2.  ACQUISITION OR DISPOSITION OF ASSETS.

(a) SOUTHEAST TEXAS CARDIOLOGY ASSOCIATES, P.A.

         On September 20, 1996, but effective September 18, 1996, Raytel Medical
         Corporation, through a wholly owned subsidiary which serves as the
         corporate general partner in a Texas limited partnership (together, the
         "Company"), acquired the nonmedical assets and assumed the liabilities
         of, and entered into a long-term management agreement with, Southeast
         Texas Cardiology Associates, P.A. (the "SETCA Practice"), a
         seven-physician cardiology practice based in Beaumont, Texas, with
         additional practice locations in Jasper, Orange and Port Arthur, Texas.
         The aggregate purchase price was approximately $7,631,000 consisting of
         (i) cash, (ii) subordinated promissory notes, and (iii) an agreement to
         deliver a specified number of shares of Common Stock at specified
         future dates. The purchase price was determined after arms-length
         negotiation between the Company and the SETCA Practice. The cash
         component of the purchase price was funded from a credit facility with
         a group of commercial banks lead by Bank of Boston Connecticut. The
         purchase price is subject to an adjustment for an increase or decrease
         in the amount of net assumed liabilities determined with reference to
         the closing statement to be prepared within 30 days after the closing.

         The management agreement with the SETCA Practice has a forty-year term
         with automatic 5-year renewal periods unless either party should give
         notice of termination at least 120 days prior to the end of the initial
         term or any renewal term. The management agreement provides for payment
         to the Company of a management fee, which includes all practice costs
         (other than amounts retained by the SETCA Practice's physicians, and a
         performance fee), if certain criteria are satisfied. Each of the
         physicians also entered into an employment agreement with the SETCA
         Practice.

         The acquired nonmedical assets include cash, cash equivalents,
         equipment, leasehold interests, and other tangible personal property.
         The SETCA Practice used the nonmedical assets in connection with the
         operation of its cardiology practice, and the Company intends to employ
         these assets to provide services under the terms of the management
         agreement with the SETCA Practice.

         Before the acquisition, there was no material relationship between the
         SETCA Practice and the registrant or any of its affiliates, any
         director or officer of the registrant, or any associate of any such
         director or officer.

(b) Business of the SETCA Practice

         The SETCA Practice is engaged in a multi-site medical practice
         providing invasive and non-invasive cardiology services to patients
         located in the six-county area surrounding Beaumont, Texas. The SETCA
         Practice intends to continue providing similar services following the
         transaction.

                                      -2-
<PAGE>   3
ITEM 7.  FINANCIAL STATEMENTS AND EXHIBITS.

(a) Financial statements of businesses acquired.

         It is impracticable to provide the audited financial statements of the
         SETCA Practice for the periods required at the date of this report. The
         Company intends to file such financial statements as soon as they
         become available and in any event not later than December 2, 1996.

(b) Pro forma financial information.

         It is impracticable to provide the pro forma financial information
         required pursuant to Article 11 of Regulation S-X at the date of this
         report. The Company intends to file such pro forma financial
         information as soon as it becomes available and in any event not later
         than December 2, 1996.

(c) The following exhibits are attached and filed herewith:

   2.1*  Master Transaction Agreement, dated as of August 21, 1996, but
         effective as of September 18, 1996, between and among Raytel Medical
         Corporation, Raytel Texas Physician Services, Inc., Raytel Southeast
         Management, L.P., Southeast Texas Cardiology Associates, P.A.,
         Southeast Texas Cardiology Associates II, P.A., Rodolfo P. Sotolongo,
         M.D., Wayne S. Margolis, M.D., Michael L. Smith, M.D., and Miguel
         Castellanos, M.D.

   2.2*  Agreement for the Purchase and Sale of Assets, dated as of August 21,
         1996, but effective as of September 18, 1996, between and among Raytel
         Medical Corporation, Raytel Texas Physician Services, Inc., Raytel
         Southeast Management, L.P., Southeast Texas Cardiology Associates,
         P.A., Southeast Texas Cardiology Associates II, P.A., Rodolfo P.
         Sotolongo, M.D., Wayne S. Margolis, M.D., and Michael L.
         Smith, M.D.

   2.3*  Management Services Agreement, dated and effective as of September 18,
         1996, between Cardiology Management Partnership, a Texas general
         partnership, and Southeast Texas Cardiology Associates II, P.A., as
         assigned to Raytel Southeast Management, L.P.

         Each of the above-listed agreements contains a list identifying all
         omitted exhibits and schedules. The Company agrees to furnish
         supplementally a copy of any omitted exhibits or schedule to the
         Securities and Exchange Commission upon request.

- -----------------
* Confidential treatment has been requested for portions of this exhibit.

                                   -3-
<PAGE>   4
                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                    RAYTEL MEDICAL CORPORATION



Dated:  October 3, 1996             By: /s/ Richard F. Bader
                                        ------------------------------------
                                        Richard F. Bader
                                        Chairman and Chief Executive Officer

                                      
                                      -4-
<PAGE>   5
                              INDEX TO EXHIBITS

  Exhibit                       Description
  -------                       -----------
   2.1*  Master Transaction Agreement, dated as of August 21, 1996, but
         effective as of September 18, 1996, between and among Raytel Medical
         Corporation, Raytel Texas Physician Services, Inc., Raytel Southeast
         Management, L.P., Southeast Texas Cardiology Associates, P.A.,
         Southeast Texas Cardiology Associates II, P.A., Rodolfo P. Sotolongo,
         M.D., Wayne S. Margolis, M.D., Michael L. Smith, M.D., and Miguel
         Castellanos, M.D.

   2.2*  Agreement for the Purchase and Sale of Assets, dated as of August 21,
         1996, but effective as of September 18, 1996, between and among Raytel
         Medical Corporation, Raytel Texas Physician Services, Inc., Raytel
         Southeast Management, L.P., Southeast Texas Cardiology Associates,
         P.A., Southeast Texas Cardiology Associates II, P.A., Rodolfo P.
         Sotolongo, M.D., Wayne S. Margolis, M.D., and Michael L.
         Smith, M.D.

   2.3*  Management Services Agreement, dated and effective as of September 18,
         1996, between Cardiology Management Partnership, a Texas general
         partnership, and Southeast Texas Cardiology Associates II, P.A., as
         assigned to Raytel Southeast Management, L.P.

         Each of the above-listed agreements contains a list identifying all
         omitted exhibits and schedules. The Company agrees to furnish
         supplementally a copy of any omitted exhibits or schedule to the
         Securities and Exchange Commission upon request.

- ------------------
* Confidential treatment has been requested for portions of this exhibit.

<PAGE>   1
                                                                     EXHIBIT 2.1


                          MASTER TRANSACTION AGREEMENT

                                  BY AND AMONG

                           RAYTEL MEDICAL CORPORATION

                       RAYTEL SOUTHEAST MANAGEMENT, L. P.

                                       AND

                 SOUTHEAST TEXAS CARDIOLOGY ASSOCIATES II, P. A.

                     SOUTHEAST TEXAS CARDIOLOGY GROUP, P. A.

                                       AND

                           RODOLFO P. SOTOLONGO, M. D.

                            WAYNE S. MARGOLIS, M. D.

                             MICHAEL L. SMITH, M. D.

                            MIGUEL CASTELLANOS, M.D.
<PAGE>   2
                                      INDEX
<TABLE>
<CAPTION>
                                                                                          PAGE
                                                                                          ----

<S>                                                                                       <C>
ARTICLE I.    DEFINITIONS...............................................................    1


ARTICLE II.    RESTRUCTURING............................................................    5
    Section 2.01 Pre-Closing Actions....................................................    5
    Section 2.02 Purchase, Security and Conveyance Agreements...........................    5
    Section 2.03 Partnership Interest Purchase Agreement................................    5
    Section 2.04 Noncompetition and Confidentiality Covenants...........................    7


ARTICLE III.    REPRESENTATIONS OF THE PHYSICIAN PARTIES................................    7

    Section 3.01 Joint Representations of the Physicians................................    7
       (a) Organization, Valid Authorization and Good Standing..........................    7
       (b) Compliance...................................................................    8
       (c) Approvals....................................................................    8
       (d) Financial Statements.........................................................    8
       (e) Undisclosed Liabilities......................................................    9
       (f) Absence of Changes or Events.................................................    9
       (g) Litigation...................................................................   10 
       (h) Permits; Compliance with Laws................................................   10 
       (i) Insurance....................................................................   11
       (j) Tax Matters..................................................................   11
       (k) Contracts....................................................................   12
       (l) Employee Benefit Plans.......................................................   12
       (m) Environmental Protection.....................................................   14
       (n) Labor Matters................................................................   14
       (o) Brokers......................................................................   14
       (p) Disclosure...................................................................   15

    Section 3.02 Several Representations of the Physicians..............................   15
       (b) Compliance...................................................................   15
       (c) Approvals....................................................................   16
       (d) Litigation...................................................................   16
       (e) Permits......................................................................   16
       (f) Staff Privileges.............................................................   16
       (h) Intentions...................................................................   17


ARTICLE IV.    REPRESENTATIONS OF THE RAYTEL PARTIES....................................   17

    Section 4.01 Representations of the Raytel Parties..................................   17
       (b) Compliance...................................................................   17
       (c) Approvals....................................................................   18
       (d) Financial Statements.........................................................   18
       (e) Litigation...................................................................   18
       (f) Disclosure...................................................................   18
</TABLE>

                                       i
<PAGE>   3
<TABLE>
<S>                                                                                       <C>
ARTICLE V.    PRE-CLOSING COVENANTS.....................................................   19

    Section 5.01 Conduct of Physician Practice..........................................   19
    Section 5.02 Access to Information and Records Before Closing.......................   19
    Section 5.03 Other Transactions.....................................................   20
    Section 5.04 Covenant Not To Compete................................................   20


ARTICLE VI.    ADDITIONAL AGREEMENTS....................................................   20

    Section 6.01 Certain Notifications..................................................   20
    Section 6.02 Investment Representations and Covenants of Physicians.................   20
    Section 6.03 No Corporate Practice..................................................   22
    Section 6.04 Development of Cardiac Catheterization Laboratory......................   22


ARTICLE VII.    CONDITIONS..............................................................   23

    Section 7.01 Conditions Precedent to the Obligations of All Parties.................   23
    Section 7.02 Conditions Precedent to the Obligations of the Raytel Parties..........   23
    Section 7.03 Conditions Precedent to the Obligations of the Physician Parties.......   24


ARTICLE VIII.    CLOSING................................................................   25

    Section 8.01 Closing................................................................   25
    Section 8.02 Deliveries to the Raytel Parties at the Closing........................   25
    Section 8.03 Deliveries to the Physician Parties at the Closing.....................   26


ARTICLE IX. TERMINATION.................................................................   26

    Section 9.01 Termination by Mutual Agreement........................................   26
    Section 9.02 Termination by Raytel Parties..........................................   26
    Section 9.03 Termination by the Physician Parties...................................   27
    Section 9.04 Termination Date.......................................................   27


ARTICLE X.    INDEMNIFICATION...........................................................   27

    Section 10.01 Indemnification by the Physician Parties..............................   27
    Section 10.02 Indemnification by the Raytel Parties.................................   28
    Section 10.03 Notice................................................................   28
    Section 10.04 Defense of Third Party Claims.........................................   29
    Section 10.05 Payment of Losses.....................................................   30
    Section 10.06 Limitations...........................................................   31


ARTICLE XI.  ARBITRATION................................................................   32

    Section 11.01 Scope.................................................................   32
    Section 11.02 Arbitrators...........................................................   32
    Section 11.03 Applicable Rules......................................................   33
</TABLE>

                                       ii
<PAGE>   4
<TABLE>
<S>                                                                                       <C>
ARTICLE XII. MISCELLANEOUS..............................................................   34

    Section 12.01 Remedies Not Exclusive................................................   34
    Section 12.02 Expenses..............................................................   35
    Section 12.03 Parties Bound.........................................................   35
    Section 12.04 Notices...............................................................   35
    Section 12.05 Choice of Law.........................................................   36
    Section 12.06 Entire Agreement; Amendments and Waivers..............................   36
    Section 12.07 Reformation Clause....................................................   36
    Section 12.08 Assignment............................................................   37
    Section 12.09 Attorneys' Fees.......................................................   37
    Section 12.10 Further Assurances....................................................   37
    Section 12.11 Announcements and Press Releases......................................   37
    Section 12.12 Return of Information and Confidentiality.............................   37
    Section 12.12 Antidilution..........................................................   38
    Section 12.13 No Tax Representations................................................   38
    Section 12.14 No Rights as Stockholder..............................................   39
    Section 12.15 Multiple Counterparts.................................................   39
    Section 12.16 Headings..............................................................   39
    Section 12.17 Severability..........................................................   39
</TABLE>

EXHIBITS

Exhibit A   Form of Asset Purchase Agreement
Exhibit B   Form of Conveyance Agreement
Exhibit C   Form of Employment Agreement
Exhibit D   Form of Management Services Agreement
Exhibit E   Form of New P Partnership Agreement
Exhibit F   Form of New PA Bylaws
Exhibit G   Form of New PA Articles of Association
Exhibit H   Form of New PA Consent
Exhibit I   Form of Note
Exhibit J   Form of Partnership Interest Purchase Agreement
Exhibit K   Form of Security Agreement

                                      iii
<PAGE>   5
                          MASTER TRANSACTION AGREEMENT


This Master Transaction Agreement ("Master Transaction Agreement"), dated and
effective as of August 21, 1996, is by and among (i) RAYTEL MEDICAL CORPORATION,
a Delaware corporation ("Raytel"); (ii) RAYTEL SOUTHEAST MANAGEMENT, L.P., a
Texas limited partnership ("Raytel Management"); RAYTEL TEXAS PHYSICIAN
SERVICES, INC., a Delaware corporation (the "Corporate General Partner") (iii)
SOUTHEAST TEXAS CARDIOLOGY ASSOCIATES, P.A., a Texas professional association
("Existing PA"); (iv) SOUTHEAST TEXAS CARDIOLOGY GROUP II, P.A., a Texas
professional association ("New PA"); and (v) RODOLFO P. SOTOLONGO, M.D., WAYNE
S. MARGOLIS, M. D., MICHAEL L. SMITH, M. D., and MIGUEL CASTELLANOS, M.D.
(collectively the "Physicians" and individually a "Physician")(Raytel, Raytel
Management, Corporate General Partner, Existing PA, New PA and the Physicians
are collectively referred to herein as the "Parties" and individually as a
"Party").


                                 R E C I T A L S

            A. Each Physician is a physician licensed to practice medicine in
the State of Texas.

            B. The Physicians desire to restructure their cardiology practice by
consummation of the transactions described in this Master Transaction Agreement.

            C. The Parties to this Master Transaction Agreement desire to set
forth the terms and conditions upon which the restructuring described above
shall be accomplished and to agree upon other matters set forth herein.

            NOW, THEREFORE, in consideration of the mutual agreements contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, and intending to be legally bound
hereby, the Parties agree as follows:


                                A G R E E M E N T

                                   ARTICLE I.
                                   DEFINITIONS

For purposes of this Master Transaction Agreement, the following terms, in
addition to other capitalized terms used in this Master Transaction Agreement
that are defined elsewhere herein, shall have the meanings set forth herein.

                                     - 1 -
<PAGE>   6
            1.01. Asset Purchase Agreement. The Asset Purchase Agreement to be
executed by and between Raytel Management, the Corporate General Partner,
Existing PA and New PA, including the Physicians' Agreement and Covenant Not To
Compete attached thereto and forming a part thereof for all purposes,
substantially in the form attached hereto as Exhibit A.

            1.02. Closing. The closing of the transactions contemplated by this
Master Transaction Agreement.

            1.03. Closing Date. As defined in Section 8.01 hereof.

            1.04. Code. The Internal Revenue Code of 1986, as amended.

            1.05. Conveyance Agreement. The Conveyance Agreement to be executed
between Existing PA and New PA substantially in the form attached hereto as
Exhibit B.

            1.06. Disclosure Schedule. The disclosure schedule attached hereto
setting forth, with reference to the applicable section and subsection of this
Master Transaction Agreement, certain information and exceptions to the
representations, warranties and covenants.

            1.07. Employment Agreements. Collectively, the Employment Agreements
to be executed between each Physician and New PA, substantially in the form set
forth in Exhibit C.

            1.08. Environmental Laws. As defined in Section 3.01(m) hereof.

            1.09. ERISA. As defined in Section 3.01(l) hereof.

            1.10. Existing PA Balance Sheet. As defined in Section 3.01(d)
hereof.

            1.11. Existing PA Balance Sheet Date. As defined in Section 3.01(d)
hereof.

            1.12. Existing PA Unaudited Financial Statements. As defined in
Section 3.01(d) hereof.

            1.13. Exchange Act. The Securities Exchange Act of 1934, as amended.

            1.14. GAAP. Generally accepted accounting principles, consistently
applied.

            1.15. Governmental Authority. Any national, state, provincial, local
or tribal governmental, judicial or administrative authority or agency.

            1.16. Hazardous Wastes. As defined in Section 3.01(m) hereof.

            1.17. Indemnity Loss. As defined in Section 10.01(a) hereof.

                                     - 2 -
<PAGE>   7
            1.18. Investment Representations Schedule. The schedule attached
hereto setting forth exceptions to each Physician's representations, warranties
and covenants set forth in Section 6.02 hereof.

            1.19. Management Services Agreement. The Management Services
Agreement to be executed between New P and New PA substantially in the form set
forth in Exhibit D.

            1.20. Market Price. The market price per share of Raytel Common
Stock determined in the following manner: (i) the closing price (which shall be
the last reported sales price, or, in case no such sales take place on such day,
the average of the closing bid and the asked prices) per share of Raytel Common
Stock on the principal national securities exchange on which the Raytel Common
Stock is then listed or admitted for trading, if the Raytel Common Stock is then
listed or admitted for trading on any national securities exchange; (ii) if
Raytel Common Stock is not then so listed on a national securities exchange, the
average of the closing bid and asked prices of the Raytel Common Stock in the
over-the-counter market as reported by Nasdaq; (iii) if the Raytel Common Stock
is not then quoted by Nasdaq, as furnished by any member of NASD selected by
Raytel for that purpose; or (iv) if no member of NASD furnishes quotes with
respect to the Raytel Common Stock, an amount determined in good faith by the
board of directors of Raytel and approved by Physicians.

            1.21. NASD. The National Association of Securities Dealers, Inc.

            1.22. Nasdaq. The National Association of Securities Dealers
Automated Quotation System.

            1.23. New P. Cardiology Management Partnership, a Texas general
partnership.

            1.24. New P Partnership Agreement. The Partnership Agreement of New
P, substantially in the form attached hereto as Exhibit E.

            1.25. New PA Bylaws. The Bylaws of New PA, substantially in the form
attached hereto as Exhibit F.

            1.26. New PA Articles of Association. The Articles of Association of
New PA, substantially in the form attached hereto as Exhibit G.

            1.27. New PA Consent. The Unanimous Consent of directors of New PA,
substantially in the form attached hereto as Exhibit H.

            1.28. Notes. Collectively, the promissory notes to be delivered to
the Physicians at the Closing pursuant to this Master Transaction Agreement,
substantially in the form set forth in Exhibit I.

            1.29. Partnership Interest Purchase Agreement. The Partnership
Interest Purchase 

                                     - 3 -
<PAGE>   8
Agreement to be executed by and among Raytel Management, the Corporate General
Partner and the Physicians, substantially in the form attached hereto as Exhibit
J.

            1.30. Physician Indemnified Persons. As defined in Section 10.02
hereof.

            1.31. Physician Parties. The Physicians, Existing PA and New PA.

            1.32. Practice. The cardiology and all other related healthcare
practices conducted by Existing PA prior to the Closing and by New PA after the
Closing.

            1.33. Raytel Audited Financial Statements. As defined in Section
4.01(e) hereof.

            1.34. Raytel Common Stock. The Common Stock, par value $0.001 per
share, of Raytel.

            1.35. Raytel Indemnified Persons. As defined in Section 10.01(a)
hereof.

            1.36. Raytel Parties. Raytel and Raytel Management.

            1.37. SEC. The Securities and Exchange Commission.

            1.38. Securities. The Notes and the shares of Raytel Common Stock to
be issued to the Physicians pursuant to this Master Transaction Agreement.

            1.39. Securities Act. The Securities Act of 1933, as amended.

            1.40. Security Agreement. The Security Agreement to be executed by
and between Raytel Management and the Physicians, substantially in the form
attached hereto as Exhibit K.

            1.41 Supplies. The supplies, pharmaceuticals, medical devices,
equipment and other expendables used by the Physicians in performing medical
services as that term is defined in the Management Services Agreement.

            1.42. Taxes. As defined in Section 3.01(j) hereof.

            1.43. Transaction Documents. This Master Transaction Agreement, the
Asset Purchase Agreement (including the Agreement and Covenant Not To Compete
attached thereto and forming a part thereof for all purposes), the Conveyance
Agreement, the Employment Agreements, the Management Services Agreement, the New
P Partnership Agreement, the New PA Bylaws, the New PA Articles of Association,
the New PA Consent, the Notes, the Partnership Interest Purchase Agreement, the
Security Agreement and each other document and instrument executed and delivered
at the Closing.

                                     - 4 -
<PAGE>   9
                                   ARTICLE II.
                                 RESTRUCTURING

            Section 2.01 Pre-Closing Actions. Immediately prior to the Closing,
the following actions shall occur in the order set forth in this Section 2.01:

                        (a) each Physician and Existing PA shall terminate any
            existing employment agreement or other agreement between such
            Physician and Existing PA;

                        (b) the Physicians shall duly organize New P by
            executing and delivering the New P Partnership Agreement;

                        (c) the Physicians shall cause New PA to be duly
            organized under the laws of Texas by (i) filing the New PA Articles
            of Association with the Secretary of State of the State of Texas,
            (ii) adopting the New PA Bylaws and (iii) executing the New PA
            Consent.

                        (d) New PA and New P shall execute and deliver the
            Management Service Agreement; and

                        (e) New PA and each Physician shall execute and deliver
            an Employment Agreement.

            Section 2.02 Purchase, Security and Conveyance Agreements. Subject
to the conditions set forth herein, at the Closing, Existing PA and Raytel
Management shall execute and deliver the Asset Purchase Agreement, and each
Physician shall execute and deliver the Agreement and Covenant Not To Compete
attached thereto and forming a part thereof. In addition, Raytel Management and
the Physicians shall execute and deliver the Security Agreement and existing PA
and New PA shall execute and deliver the Conveyance Agreement.

            Section 2.03 Partnership Interest Purchase Agreement. Subject to the
conditions set forth herein, at the Closing, after the occurrence of the events
described in Section 2.02, Raytel Management and the Physicians shall execute
and deliver the Partnership Interest Purchase Agreement, and, in consideration
therefor, Raytel or Raytel Management, as appropriate, shall deliver the
following consideration to the Physicians in the amounts and on the dates set
forth below:

                                     - 5 -
<PAGE>   10
                        (a) At the Closing, Raytel shall deliver to each
            Physician a Note in the original principal amount set forth opposite
            such Physician's name:

<TABLE>
<CAPTION>
                                                               PRINCIPAL
                                                                AMOUNT
            PHYSICIAN                                           OF NOTE
            ---------                                           -------
<S>                                                           <C>        
            Rodolfo P. Sotolongo, M.D.                        [*]

            Wayne S. Margolis, M.D.                           [*]

            Michael L. Smith, M.D.                            [*]

            Miguel Castellanos, M.D.                          [*]
</TABLE>

            Provided, however, that, to secure for New PA the benefits of each
            Employment Agreement and as an additional inducement for the
            performance by each Physician of such Physician's obligations
            thereunder, in the event the Employment Agreement between New PA and
            any Physician is terminated prior to the fifth anniversary of the
            Closing Date by (i) New PA for cause and without such Physician's
            payment of the appropriate amount of liquidated damages, as
            specified in such Employment Agreement, or (ii) such Physician
            without cause and without such Physician's payment of the
            appropriate amount of liquidated damages, as specified in such
            Employment Agreement, then such Physician shall execute an
            appropriate assignment of the Note held by such Physician pursuant
            to which all of the Physician's rights under such Note are assigned
            to Raytel Management. If such Physician fails to execute the
            assignment of Note provided for in this Section 2.03, such Note
            shall be deemed assigned to Raytel Management, and Raytel shall be
            authorized to setoff against such Note the amounts specified herein.

                        (b) At the Closing, Raytel Management shall deliver to
            each Physician cash in the amount set forth opposite such
            Physician's name:

<TABLE>
<CAPTION>
            PHYSICIAN                                           CASH AMOUNT
            ---------                                           -----------
<S>                                                            <C>          
            Rodolfo P. Sotolongo, M.D.                         [*]

            Wayne S. Margolis, M.D.                            [*]

            Michael L. Smith, M.D.                             [*]

            Miguel Castellanos, M.D.                           [*]
</TABLE>

            Payments of the cash amounts set forth above may be made by wire
            transfer to bank accounts designated by each Physician.

                        (c) On the first, second, third, fourth and fifth
            anniversaries of the Closing 


[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                     - 6 -
<PAGE>   11
            Date, Raytel shall deliver shares of Raytel Common Stock to each
            Physician in the amounts set forth opposite such Physician's name:

<TABLE>
<CAPTION>
                                          Number of Shares of Raytel Common Stock
                               ---------------------------------------------------------------
                                  First       Second        Third       Fourth        Fifth
     Physician                 Anniversary  Anniversary  Anniversary  Anniversary  Anniversary
     ---------                 -----------  -----------  -----------  -----------  -----------
<S>                               <C>          <C>          <C>         <C>          <C>   
Rodolfo P. Sotolongo, M.D         [*]          [*]          [*]         [*]          [*]

Wayne S. Margolis, M.D            [*]          [*]          [*]         [*]          [*]

Michael L. Smith, M.D             [*]          [*]          [*]         [*]          [*]

Miguel Castellanos, M.D           [*]          [*]          [*]         [*]          [*]
</TABLE>


            Section 2.04. Noncompetition and Confidentiality Covenants. In
connection with the consummation of the transactions contemplated by this Master
Transaction Agreement, and by executing and delivering certain of the other
Transaction Documents, the Physician Parties will be entering into certain
noncompetition and confidentiality covenants. The Physician Parties recognize
that such covenants are an essential part of the transactions contemplated by
this Master Transaction Agreement and certain other Transaction Documents and
that, but for the contemplated agreement of the Physician Parties to comply with
such covenants, the Raytel Parties would not have entered into this Master
Transaction Agreement or any other Transaction Documents.


                                  ARTICLE III.
                    REPRESENTATIONS OF THE PHYSICIAN PARTIES

            Section 3.01 Joint Representations of the Physicians. The Physicians
represent and warrant to the Raytel Parties that:

                        (a) Organization, Valid Authorization and Good Standing.
            Each of Existing PA and New PA is a professional associations duly
            organized, validly existing and in good standing under the laws of
            the State of Texas. Each of Existing PA and New PA has the power and
            authority to own all of its properties and assets and to conduct the
            Practice. Each of Existing PA and New PA has the power and authority
            to enter into the Transaction Documents to which it is a party and
            to carry out its obligations thereunder. The execution and delivery
            of the Transaction Documents to which Existing PA or New PA is a
            party and the consummation of the transactions contemplated thereby
            have been duly and validly authorized by such party, and no other
            corporate or other proceedings on the part of such party are
            necessary to authorize such Transaction Documents and the
            transactions contemplated thereby. This


[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                     - 7 -
<PAGE>   12
            Master Transaction Agreement has been duly and validly executed and
            delivered by Existing PA and New PA and constitutes the valid and
            binding agreement of such party enforceable against it in accordance
            with its terms. Each Transaction Document executed and delivered by
            Existing PA or New PA will upon such execution and delivery
            constitute the valid and binding agreement of such party enforceable
            against it in accordance with its terms.

                        (b) Compliance. Except as disclosed on the Disclosure
            Schedule, the execution and delivery of the Transaction Documents
            and the consummation of the transactions contemplated thereby by
            Existing PA or New PA will not (i) violate any provision of its
            organizational documents, (ii) violate any material provision of or
            result in the breach of or entitle any party to accelerate (whether
            after the giving of notice or lapse of time or both) any material
            obligation under, any mortgage, lien, lease, contract, license,
            instrument or any other agreement to which party is a party, (iii)
            result in the creation or imposition of any material lien, charge,
            pledge, security interest or other material encumbrance upon any
            property of such party or (iv) to the best of each Physician's
            knowledge, violate or conflict with any order, award, judgement or
            decree or other material restriction or any law, ordinance or
            regulation to which such party or its property is or will be
            subject.

                        (c) Approvals. To the best of each Physician's
            knowledge, no consent, approval, order or authorization of, or
            registration, declaration or filing with, any Governmental Authority
            or other person is required in connection with the execution and
            delivery of the Transaction Documents by Existing PA or New PA or
            the consummation by it of the transactions contemplated thereby,
            except for those consents or approvals set forth in the Disclosure
            Schedule.

                        (d) Financial Statements. Existing PA has furnished to
            the Raytel Parties Existing PA's unaudited financial statements for
            the two years ended December 31, 1994 and December 31, 1995, the
            six-month period ended June 30, 1996, consisting of a balance sheet,
            the related statement of income, and changes in stockholders' equity
            (collectively, the "Existing PA Unaudited Financial Statements"). To
            the best of each Physician's knowledge, except for the omission of
            footnotes, preparation in summary or condensed form and the effect
            of normal, recurring year-end adjustments, the Existing PA Unaudited
            Financial Statements (i) have been prepared in accordance with the
            principles of cash accounting consistently applied, (ii) are true,
            complete and correct in all material respects as of the dates and
            for the periods above stated and (iii) fairly present the financial
            position of Existing PA at such dates and the results of its
            operations for the periods ended on such dates. Except as set forth
            in the Disclosure Schedule, and except for the omission of
            footnotes, preparation in summary or condensed form and the effect
            of normal, year-end adjustments, the Existing PA Unaudited Financial
            Statements reflect all of the liabilities and obligations of
            Existing PA that are required to be reflected or disclosed therein
            in accordance with principles of cash accounting consistently
            applied. For purposes of this Master Transaction 

                                     - 8 -
<PAGE>   13
            Agreement, the balance sheet of Existing PA included in Existing PA
            Unaudited Financial Statements is referred to as the "Existing PA
            Balance Sheet" and the date thereof is referred to as the "Existing
            PA Balance Sheet Date."

                        (e) Undisclosed Liabilities. To the best of each
            Physician's knowledge, Existing PA does not have any liability
            (whether asserted or unasserted, whether absolute or contingent,
            whether accrued or unaccrued, whether liquidated or unliquidated,
            whether due or to become due, and whether choate or inchoate)
            individually or in the aggregate in excess of $10,000, and there is
            no basis for any present or future action, suit, proceeding,
            hearing, investigation, charge, complaint, claim or demand against
            Existing PA giving rise to any liability, except as set forth on the
            Existing PA Balance Sheet or on the Disclosure Schedule.

                        (f) Absence of Changes or Events. Except as set forth on
            the Disclosure Schedule, since the Existing PA Balance Sheet Date,
            Existing PA has conducted the Practice only in the ordinary course
            of business, and Existing PA has not:

                            (i) Incurred any obligation or liability, absolute,
                 accrued, contingent or otherwise, whether due or to become due,
                 whether individually or in the aggregate, that has had or might
                 have a material adverse effect on Existing PA or the Practice;

                            (ii) Pledged or subjected to any material lien,
                 charge, security interest or any other encumbrance or
                 restriction on any of its assets;

                            (iii) Sold, transferred, leased to others or
                 otherwise disposed of any of its assets material to the
                 operation of the Practice, except in the ordinary course of the
                 business of Existing PA;

                            (iv) Canceled or compromised any material debt or
                 claim, or waived or released any right of substantial value;

                            (v) Received any notice of termination of any
                 contract, lease or other agreement, or suffered any damage,
                 destruction or loss that, individually or in the aggregate, has
                 had or might have a material adverse effect on Existing PA or
                 the Practice;

                            (vi) Instituted, settled or agreed to settle any
                 litigation, action, proceeding or arbitration;

                            (vii) Failed to replenish its Supplies (as defined
                 in Section 1.37) in a normal and customary manner or made any
                 material purchase commitment other than in the ordinary course
                 of business of Existing PA;

                            (viii) Failed to pay any accounts or notes payable
                 or any other 

                                     - 9 -
<PAGE>   14
                 obligations on a timely basis consistent with the practices of 
                 Existing PA;

                            (ix) Entered into any material transaction, contract
                 or commitment other than in the ordinary course of the business
                 of Existing PA;

                            (x) Suffered any event or events, whether
                 individually or in the aggregate, that has had or could be
                 reasonably expected to have a material adverse effect on the
                 financial condition, results of operations, properties, assets,
                 liabilities, business, operations or prospects of Existing PA
                 or the Practice;

                            (xi) Made any material change in the rate of
                 compensation, commission, bonus or other remuneration payable,
                 or paid or agreed to pay any material bonus, extra
                 compensation, pension, severance or vacation pay, to any
                 partner or employee;

                            (xii) Issued any equity interests, declared or paid
                 any distribution or entered into any agreement or understanding
                 to do or engage in any of the foregoing actions;

                            (xiii) Engaged in any activities or practices other
                 than the Practice; or

                            (xiv) Entered into any agreement or made any
                 commitment to take any of the actions described in Subsections
                 (i) through (xiii) inclusive of this Section 3.01(f).

                        (g) Litigation. Except as disclosed on the Disclosure
            Schedule, there are no material claims, actions, suits, proceedings
            (arbitration or otherwise) or investigations pending or, to the best
            of each Physician's knowledge, threatened against Existing PA or the
            Practice at law or in equity in any court or before or by any
            Governmental Authority, and, to the best of each Physician's
            knowledge, there are no, and have not been any, facts, conditions or
            incidents that may result in any such actions, suits, proceedings
            (arbitration or otherwise) or investigations which if adversely
            determined would have a material adverse effect on the practice. To
            the best of the Physicians' knowledge, neither Existing PA nor the
            Practice is in default in respect of any judgment, order, writ,
            injunction or decree of any court or other Governmental Authority.

                        (h) Permits; Compliance with Laws. Each of Existing PA
            and New PA has all permits, licenses, orders and approvals of all
            Governmental Authorities material to the conduct of the Practice, a
            true and correct list of which is set forth on the Disclosure
            Schedule. To the best of each Physician's knowledge, all such
            permits, licenses, orders and approvals are in full force and
            effect, and no suspension or cancellation of any of them is pending
            or threatened. To the best of each Physician's 

                                     - 10 -
<PAGE>   15
            knowledge, none of such permits, licenses, orders or approvals, and
            no application for any of such permits, licenses, orders or
            approvals, will be adversely affected by the consummation of the
            transactions contemplated by this Master Transaction Agreement or
            any other Transaction Document. Except as set forth on the
            Disclosure Schedule, no consent or approval is required for, and no
            other impediment or restriction exists that will prohibit or limit,
            the transfer of any of such permits, licenses, orders and approvals
            (and any applications therefor) in accordance with the terms of the
            Transaction Documents. The Physician Parties have not received any
            written notice of violation that Existing PA in its conduct of the
            Practice has not complied in any material respects with any rule or
            regulation of any Governmental Authority having authority over
            Existing PA, including without limitation, agencies concerned with
            occupational safety, environmental protection, employment practices,
            and Medicare and Medicaid requirements applicable to Existing PA's
            billing procedures (except denials of claims in the ordinary course
            of business).

                        (i) Insurance. The Disclosure Schedule sets forth a
            complete and correct list of all insurance policies obtained and
            maintained by Existing PA or the Physicians in connection with the
            operation of the Practice. Such insurance policies are in full force
            and effect, and all premiums due on such policies have been paid.
            The insureds under each such policy have complied in all material
            respects with the provisions of all such policies. Except as set
            forth on the Disclosure Schedule, no consent or approval is required
            for, and no other impediment or restriction exists that will
            prohibit or limit, the transfer of any such insurance policies in
            accordance with the terms of the Asset Purchase Agreement. Existing
            PA and the Physicians have made available to the Raytel Parties
            complete and correct copies of all such policies, together with all
            riders and amendments thereto. Existing PA and the Physicians have
            also set forth on the Disclosure Schedule a list of malpractice
            insurance policies previously maintained within the last ten (10)
            years by them. They have also set forth on such Disclosure Schedule
            a list of all malpractice claims and similar types of claims,
            actions or proceedings asserted against any of the Physicians or
            Existing PA at any time within the last ten (10) years.

                        (j) Tax Matters. To the best of each Physician's
            knowledge, all federal, state and local tax returns required to be
            filed by Existing PA prior to the Closing Date have been filed on a
            timely basis with the appropriate Governmental Authorities in all
            jurisdictions in which such returns are required to be filed, and
            all such returns are true and correct. To the best of each
            Physician's knowledge, all federal, state and local income,
            franchise, sales, use, property, and all other taxes, fees,
            assessments or other governmental changes (including withholding
            taxes), and all interest and penalties thereon (all of the
            foregoing, collectively "Taxes") due from, or properly accruable by,
            Existing PA with respect to taxable periods ending on or prior to,
            and the portion of any interim period through, the date hereof have
            been fully and timely paid or, in the case of Taxes for which
            payment is not yet required, properly and fully accrued for on
            Existing PA Unaudited Financial Statements. The Raytel Parties will
            not after the 

                                     - 11 -
<PAGE>   16
            Closing owe, or be liable directly or indirectly, to any other
            person or entity for any taxes imposed upon Existing PA. Existing PA
            is not currently the subject of any audit, examination or any
            similar investigation by any Governmental Authority. The Disclosure
            Schedule sets forth all audits, examinations or similar
            investigations of Existing PA by any Governmental Authority since
            January 1, 1990. The consummation of the transactions contemplated
            by the Asset Purchase Agreement will not be subject to any sales or
            other transfer tax of any state or local taxing authority.

                        (k) Contracts. Set forth on the Disclosure Schedule is a
            complete and correct list of all material agreements, contracts and
            commitments, written or oral, to which Existing PA is a party or by
            which it or any of its properties or the Practice is bound,
            including without limitation: (i) mortgages, indentures, notes,
            letters or credit, security agreements and other agreements and
            instruments relating to the borrowing of money by or extension of
            credit to or by Existing PA; (ii) employment and consulting
            agreements, employee benefit, profit-sharing and retirements plans
            and all collective bargaining agreements; (iii) all joint venture or
            partnership agreements to which Existing PA is a party; (iv)
            licenses of software and any patent, trademark and other
            intellectual property rights; (v) agreements or commitments for
            capital expenditures; (vi) brokerage or finder's agreements; (vii)
            agreements regarding clinical research; and (viii) agreements with
            payors, leases for real or personal property and contracts to
            provide medical or health-care services. Existing PA has made
            available to the Raytel Parties complete and correct copies of all
            written agreements, contracts and commitments, together with all
            amendments thereto, and accurate descriptions of all oral
            agreements, set forth on the list on the Disclosure Schedule. All
            such agreements, contracts and commitments are in full force and
            effect and, to the best of each Physician's knowledge, all parties
            thereto have performed all material obligations required to be
            performed by them to date, are not in default in any material
            respect thereunder, and have not violated any representation or
            warranty, explicit or implied, contained therein. No claim or
            default by any party has been made or is now pending under any such
            agreement, contract or commitment, and, to the best of the
            Physicians' knowledge, no event has occurred and is continuing that
            with notice or the passing of time or both would constitute a
            default thereunder or would excuse performance by any party thereto.
            Except as set forth in the Disclosure Schedule, no consents or
            approvals are required under the terms of any agreement listed on
            the Disclosure Schedule in connection with any of the transactions
            contemplated by the Transaction Documents including, without
            limitation, the transfer of any such agreement pursuant to the Asset
            Purchase Agreement.

                        (l) Employee Benefit Plans. Except as set forth on the
            Disclosure Schedule, neither Existing PA nor any other entity,
            whether or not incorporated, which is deemed to be under common
            control (as defined in Section 414 of the Code or 4001(b) of the
            Employee Retirement Income Security Act of 1974, as amended
            ("ERISA"), with Existing PA ("Commonly Controlled Entity") maintains
            or contributes to any employee pension benefit plan (as defined in
            Section 3(2) of ERISA) 

                                     - 12 -
<PAGE>   17
            that is a defined contribution plan described in Section 3(34) of
            ERISA or Section 414(i) of the Code, or that is a defined benefit
            plan described in Section 3(35) of ERISA or Section 414(j) of the
            Code, and that gives, or will give, rise to any liability of
            Existing PA for (i) any premium payments due under Section 4007 of
            ERISA with respect to any such defined benefit plan, or (ii) any
            unpaid minimum funding contributions that would result in the
            imposition of a lien on any assets of Existing PA pursuant to
            Section 412(c)(11) of the Code or Section 302(c)(11) of ERISA.
            Neither Existing PA nor any Commonly Controlled Entity sponsors or
            sponsored, or maintains or maintained, any defined benefit plan
            (described in the immediately preceding sentence) that has been, or
            will be, terminated in a manner that would result in any liability
            of Existing PA to the Pension Benefit Guaranty Corporation or that
            would result in the imposition of a lien on any assets of Existing
            PA pursuant to Section 4068 of ERISA. At no time during the five (5)
            consecutive year period immediately preceding the first day of the
            year in which the Closing Date occurs has Existing PA or any
            Commonly Controlled Entity participated in or contributed to any
            multiemployer plan defined in Section 4001(a)(3) of ERISA, or
            Section 414(f) of the Code, nor during such period has Existing PA
            or any Commonly Controlled Entity had an obligation to participate
            in or contribute to any such multiemployer plan. Except as set forth
            on the Disclosure Schedule, Existing PA is not obligated under any
            agreement or other arrangement pursuant to which compensation or
            benefits will become payable as a result of the consummation of the
            transactions contemplated in this Master Transaction Agreement.
            Neither Existing PA nor any of its respective directors, officers,
            employees or agents, has, with respect to any employee benefit plan
            (as defined in Section 3(3) of ERISA), that is or has been
            established by or contributed to, or with respect to which costs or
            liabilities are accrued by Existing PA, engaged in any conduct that
            would result in any material taxes or penalties on prohibited
            transactions under Section 4975 of the Code or under Section 502(i)
            or (1) of ERISA or in breach of fiduciary duty liability under
            Section 409 of ERISA which, in the aggregate, could be material to
            the business, financial condition or results of operation of
            Existing PA, taken as a whole, and no actions, investigations, suits
            or claims with respect to the fiduciaries, administrators or assets
            of any such employee benefit plan (other than routine claims for
            benefits) is pending or threatened, which, in the aggregate could
            reasonably be expected to give rise to material liability of
            Existing PA, that could be material to the business, financial
            condition or results of operations of Existing PA, taken as a whole.
            None of the Existing PA welfare benefit plans (as defined in Section
            3(1) of ERISA) provides for or promises retiree medical, disability
            or life insurance benefits to any current or former employee,
            officer or director of Existing PA other than "continuation
            coverage" required under the Controlled Omnibus Budget
            Reconciliation Act of 1985. Any and all plans, policies, programs or
            arrangements of Existing PA or any Commonly Controlled Entity which
            are subject to Section 4980B of the Code have been and are in
            compliance with the requirements of Section 4980B of the Code and
            Part 6 of Title I of ERISA. Existing PA will remain fully liable
            with respect to all plans, programs, policies or other arrangements,
            including but not limited to any pension, profit-sharing, thrift or
            other retirement plan; deferred compensation; 

                                     - 13 -
<PAGE>   18
            or any other pension benefit plan of any kind; stock ownership,
            stock purchase, performance share, bonus or other incentive plan;
            severance plan; disability, medical, dental, vision or other health
            plan; life insurance or death benefit plan; vacation, sick leave,
            holiday or other paid leave plan; cafeteria plan, medical flexible
            spending account reimbursement plan; dependent care plan; or any
            other welfare benefit plan of any kind; or any other benefit plan,
            policy, program or arrangement whether or not any such plan, policy,
            program or other arrangement is, or is intended to be, qualified
            under Section 401(a) of the Code, and whether or not any such plan,
            policy, program or arrangement is subject to the provisions of
            ERISA, and the Raytel Parties will not be required to assume by law
            or under any form of any such plans, policies, programs or
            arrangements any of the liabilities for or under such plans,
            policies, programs or arrangements.

                        (m) Environmental Protection. To the best of each
            Physician's knowledge, Existing PA has obtained all permits,
            licenses and other authorizations that are required for the conduct
            of its Practice under any federal, state and local laws and the
            regulations promulgated thereunder relating to pollution or
            protection of the environment, including laws relating to emissions,
            discharges, releases or threatened releases of hazardous substances,
            materials or wastes (collectively, "Hazardous Wastes"), into the
            environment (including, without limitation, ambient air, surface
            water, ground water, or land), or otherwise relating to the
            manufacture, processing, distribution, use, treatment, storage,
            disposal, transport, or handling of Hazardous Wastes (collectively,
            "Environmental Laws"). To the best of each Physician's knowledge,
            Existing PA and the Practice is in material compliance with all
            terms and conditions of such required permits, licenses and
            authorizations, and is also in compliance with all applicable
            Environmental Laws. Except as set forth on the Disclosure Schedule,
            no consent or approval is required for, and no other impediment or
            restriction exists that will prohibit or limit, the transfer of such
            permits, licenses and authorizations in accordance with the terms of
            the Asset Purchase Agreement. There are no pending or, to the best
            of each Physician's knowledge, threatened, investigations, actions
            or proceedings of whatsoever nature involving Existing PA or the
            Practice arising under any Environmental Laws.

                        (n) Labor Matters. Except as described on the Disclosure
            Schedule, there are no contracts for the employment of any officer
            or employee of Existing PA in effect. The Disclosure Schedule sets
            forth a complete list of the names and positions held of all
            employees of Existing PA, and the current annual rate of
            compensation (including bonuses) paid to each such employee.

                        (o) Brokers. All negotiations relating to the
            Transaction Documents and the transactions contemplated hereby have
            been carried on without the intervention of any person acting on
            behalf of the Physician Parties as a group in such manner as to give
            rise to any valid claim against any Raytel Party for any broker's or
            finder's fee or similar compensation.

                                     - 14 -
<PAGE>   19
                        (p) Disclosure. To the best of each Physician's'
            knowledge, no representation, warranty or statement made by any of
            the Physician Parties in this Master Transaction Agreement or any of
            the exhibits or schedules hereto, or any agreements, certificates,
            documents or instruments delivered or to be delivered to the Raytel
            Parties in accordance with this Master Transaction Agreement or the
            other Transaction Documents, contains any untrue statement of a
            material fact or omits to state a material fact necessary to make
            the statements contained herein or therein, in light of the
            circumstances under which they were made, not misleading. The
            Physician Parties do not know of any fact or condition (other than
            general economic conditions or legislative or administrative changes
            in health-care delivery) that materially adversely affects, or in
            the future may materially adversely affect, the condition,
            properties, assets, liabilities, business, operations or prospects
            of the Practice that has not been set forth herein or in the
            Disclosure Schedule.

                        (q) Cardiac Catheterization Lab. The Physicians have an
            existing agreement with St. Elizabeth's Hospital or with Baptist
            Memorial Hospital in Beaumont, Texas, for the development of a
            cardiac catheterization laboratory on the hospital campus, and the
            Cath Lab will be eligible for licensing as a fully functional cath
            lab for the performance of both diagnostic and invasive and
            noninvasive therapeutic procedures.

                        (r) Financial and Medical Environmental Factors. Except
            as set forth on the Disclosure Schedule, the Physicians are not
            aware of any financial or medical practice environmental factor
            which would materially affect the medical practice as now being
            conducted by the Physicians and the Existing PA.

            Section 3.02 Several Representations of the Physicians. Each of the
Physicians severally represents and warrants to the Raytel Parties as to himself
that:

                        (a) Valid Authorization. Such Physician is competent and
            has full power, capacity and authority to enter into the Transaction
            Documents to which such Physician is a party and to carry out such
            Physician's obligations thereunder. This Master Transaction
            Agreement has been duly and validly executed and delivered by such
            Physician and constitutes the valid and binding agreement of such
            Physician enforceable against such Physician in accordance with its
            terms. Each Transaction Document executed and delivered at the
            Closing by such Physician will upon such execution and delivery
            constitute the valid and binding agreement of such Physician
            enforceable against such Physician in accordance with its terms.

                        (b) Compliance. Except as set forth on the Disclosure
            Schedule, to the best of such Physician's knowledge, the execution
            and delivery of the Transaction Documents and the consummation of
            the transactions contemplated thereby by such Physician will not (i)
            violate any material provision of or result in the breach of or

                                     - 15 -
<PAGE>   20
            entitle any party to accelerate (whether after the giving of notice
            or lapse of time or both) any material obligation under any
            mortgage, lien, lease, contract, license, instrument or any other
            agreement to which such Physician is a party, (ii) result in the
            creation or imposition of any material lien, charge, pledge,
            security interest or other encumbrance upon any property of such
            Physician or (iii) violate or conflict with any order, award,
            judgment or decree or other material restriction or any law,
            ordinance or regulation to which such Physician or the property of
            such Physician is subject.

                        (c) Approvals. To the best of such Physician's
            knowledge, no consent, approval, order or authorization of, or
            registration, declaration or filing with, any Governmental Authority
            or other person is required in connection with the execution and
            delivery of the Transaction Documents by such Physician or the
            consummation by such Physician of the transactions contemplated
            thereby.

                        (d) Litigation. Except as disclosed on the Disclosure
            Schedule, there are no claims, actions, suits or proceedings
            (arbitration or otherwise) pending or, to such Physician's
            knowledge, threatened against such Physician at law or at equity in
            any court or before or by any Governmental Authority arising out of
            or otherwise relating to such Physician's practice of medicine, and,
            to such Physician's knowledge, there are no, and within the last
            five (5) years have not been any, facts, conditions or incidents
            that may result in any such actions, suits, proceedings (arbitration
            or otherwise) or investigations which if adversely determined would
            have a material adverse effect on the Practice. Such Physician is
            not in default in respect of any judgement, order, writ, injunction
            or decree of any court or other Governmental Authority known to such
            Physician.

                        (e) Permits. To the best of such Physician's knowledge,
            such Physician has all permits, licenses, orders and approvals of
            all Governmental Authorities necessary to perform the services
            performed by such Physician in connection with the conduct of the
            Practice. All such permits, licenses, orders and approvals are in
            full force and effect and no suspension or cancellation of any of
            them is pending or threatened. To the best of such Physician's
            knowledge, none of such permits, licenses, orders or approvals, and
            no application for any of such permits, licenses, orders or
            approvals will be adversely affected by the consummation of the
            transactions contemplated by the Transaction Documents. Such
            Physician is a participating physician, as such term is defined by
            the Medicare program, and such Physician has not been disciplined,
            sanctioned or excluded from the Medicare program and has not been
            subject to any plan of correction imposed by any professional review
            body within the last five (5) years.

                        (f) Staff Privileges. The Disclosure Schedule lists all
            hospitals at which such Physician has full staff privileges. Such
            staff privileges have not been revoked, surrendered, suspended or
            terminated, and to such Physician's knowledge, there are no, and
            have not been any, facts, conditions or incidents that may result in
            any such 

                                     - 16 -
<PAGE>   21
            revocation, surrender, suspension or termination.

                        (g) Board Certification. The Physicians each are board
            certified in cardiology by the American College of Cardiology.

                        (h) Intentions. Except as set forth on the Disclosure
            Schedule, from and after the Closing Date, such Physician intends to
            continue practicing medicine on a full-time basis for the next five
            (5) years with New PA and does not know of any fact or condition
            that materially adversely affects, or in the future may materially
            adversely affect, his ability or intention to practice medicine on a
            full-time basis for the next five years with New PA.


                                   ARTICLE IV.
                     REPRESENTATIONS OF THE RAYTEL PARTIES

            Section 4.01 Representations of the Raytel Parties. The Raytel
Parties jointly and severally represent and warrant to each of the Physicians
that:

                        (a) Organization, Valid Authorization and Good Standing.
            Raytel is a corporation duly organized, validly existing and in good
            standing under the laws of the State of Delaware. Raytel Management
            is a limited partnership duly organized, validly existing and in
            good standing under the laws of the State of Texas. Each of the
            Raytel Parties has the power and authority to own all of its
            properties and assets and to conduct its business. Each of the
            Raytel Parties has the power and authority to enter into the
            Transaction Documents to which it is a party and to carry out its
            obligations thereunder. The execution and delivery of the
            Transaction Documents to which it is a party and the consummation of
            the transactions contemplated thereby have been duly and validly
            authorized by each of the Raytel Parties, and no other corporate or
            other proceedings on the part of either of the Raytel Parties are
            necessary to authorize the Transaction Documents and the
            transactions contemplated thereby. This Master Transaction Agreement
            has been duly and validly executed and delivered by each of the
            Raytel Parties and constitutes the valid and binding agreement of
            each of the Raytel Parties enforceable against the Raytel Parties,
            in accordance with its terms. Each Transaction Document executed and
            delivered at the Closing by a Raytel Party will upon such execution
            and delivery constitute the valid and binding agreement of such
            Raytel Party, enforceable against such Raytel Party in accordance
            with its terms.

                        (b) Compliance. The execution and delivery of the
            Transaction Documents and the consummation of the transactions
            contemplated thereby by the Raytel Parties will not (i) violate any
            provision of their respective organizational documents, (ii) violate
            any material provision of or result in the breach of or entitle any
            party to accelerate (whether after the giving of notice or lapse of
            time or both) any material obligation under, any mortgage, lien,
            lease, contract, license, instrument or 

                                     - 17 -
<PAGE>   22
            any other agreement to which either of the Raytel Parties is a
            party, (iii) result in the creation or imposition of any material
            lien, charge, pledge, security interest or other encumbrance upon
            any property of either of the Raytel Parties or (iv) violate or
            conflict with any order, award, judgement or decree.

                        (c) Approvals. No consent, approval, order or
            authorization of, or registration, declaration or filing with, any
            Governmental Authority or other person is required in connection
            with the execution and delivery of the Transaction Documents by
            either of the Raytel Parties or the consummation by either of the
            Raytel Parties of the transactions contemplated thereby.

                        (d) Financial Statements. Raytel has furnished to the
            Physician Parties Raytel's audited financial statements for the year
            ended September 30, 1995, consisting of a balance sheet, the related
            statement of income and changes in stockholders' equity (the "Raytel
            Audited Financial Statements"). In addition, Raytel has furnished to
            the Physician Parties its unaudited financial statements for the
            three-month period ended March 31, 1996, consisting of a balance
            sheet, the related statement of income and changes in stockholders'
            equity (the "Raytel Unaudited Financial Statements"). With respect
            to the Raytel Unaudited Financial Statements, except for the
            omission of footnotes, preparation in summary or condensed form and
            the effect of normal, year-end adjustments, the Raytel Audited
            Financial Statements and the Raytel Unaudited Financial Statements
            (i) have been prepared in accordance with GAAP, (ii) are true,
            complete and correct in all material respects as of their date and
            for the period above stated and (iii) fairly present the financial
            position of Raytel at such date and the results of its operations
            for the period ended on such date. Except as set forth on the
            Disclosure Schedule, each of the Raytel Audited Financial Statements
            and the Raytel Unaudited Financial Statements reflects all of the
            liabilities and obligations of Raytel that are required to be
            reflected or disclosed therein in accordance with GAAP.

                        (e) Litigation. Except as set forth on the Disclosure
            Schedule, there are no claims, actions, suits, proceedings
            (arbitration or otherwise) or investigations pending or, to either
            of the Raytel Parties' knowledge, threatened against either of the
            Raytel Parties at law or in equity in any court or before or by any
            Governmental Authority, and, to such Raytel Parties' knowledge,
            there are no, and have not been any, facts, conditions or incidents
            that may result in any such actions, suits, proceedings (arbitration
            or otherwise) or investigations. Neither of the Raytel Parties is in
            default in respect of any judgment, order, writ, injunction or
            decree of any court or other Governmental Authority. None of the
            matters listed in the Disclosure Schedule will have a material
            adverse affect on the Raytel Parties even if adversely decided
            against any of the Raytel Parties.

                        (f) Disclosure. No representation, warranty or statement
            made by any of the Raytel Parties in this Master Transaction
            Agreement or any of the exhibits or schedules hereto, or any
            agreements, certificates, documents or instruments delivered 

                                     - 18 -
<PAGE>   23
            or to be delivered to the Physician Parties in accordance with this
            Master Transaction Agreement or the other Transaction Documents
            contains any untrue statement of a material fact or omits to state a
            material fact necessary to make the statements contained herein or
            therein, in light of the circumstances under which they were made,
            not misleading.

                                   ARTICLE V.
                             PRE-CLOSING COVENANTS

            Section 5.01 Conduct of Physician Practice. From the date hereto to
the Closing, except with the prior written consent of Raytel or as set forth on
the Disclosure Schedule, or except as otherwise provided for in this Master
Transaction Agreement, each Physician and Existing PA will:

                        (a) carry on the Practice in the usual, regular and
            ordinary course in substantially the same manner as heretofore and
            use best efforts to preserve relationships with patients,
            contractors, institutional health care providers, health care
            professionals and others having business dealings with the Practice;

                        (b) keep in full force and effect insurance comparable
            in amount and scope of coverage to insurance now carried by Existing
            PA;

                        (c) perform all obligations under agreements, contracts
            and instruments relating to or affecting the Practice;

                        (d) comply with all statutes, laws, ordinances, rules
            and regulations applicable to the Practice;

                        (e) not merge or consolidate with or purchase
            substantially all of the assets of, or otherwise acquire, any
            corporation, partnership, association or other business; and

                        (f) promptly advise Raytel in writing of any material
            adverse change in the financial condition, results of operations,
            properties, assets, liabilities, business operations or prospects of
            the Practice.

            Section 5.02 Access to Information and Records Before Closing.
Subject to the Confidentiality provision set forth in Section 12.12, Raytel may,
at its expense, prior to the Closing Date, make, or cause to be made, such
investigation of the assets, liabilities, operations and properties of Existing
PA and of its financial and legal condition as Raytel deems necessary or
advisable to familiarize itself with such matters. Each Physician Party shall
permit Raytel and its representatives (including legal counsel and independent
accountants) upon reasonable notice to have full access to the properties and
relevant books and records of Existing PA, at reasonable business hours, and
will cause its employees to 

                                     - 19 -
<PAGE>   24
furnish Raytel with such financial and operating data and other information and
copies of documents with respect to the services, operations and properties of
Existing PA as Raytel may from time to time request.

            Section 5.03 Other Transactions. Existing PA and the Physicians
agree that so long as this Agreement has not been terminated in accordance with
its terms, neither Existing PA nor any of the Physicians, will, directly or
indirectly through any officer, director, employee, agent or otherwise, take any
action to solicit, initiate, seek, encourage or support any inquiry, proposal or
offer from, furnish any information to, or participate in any negotiations with,
any corporation, partnership, person or other entity or group (other than Raytel
and its officers, employees and agents) regarding any acquisition of any capital
stock or other securities of Existing PA, any merger or consolidation with or
involving Existing PA, or any acquisition of any material portion of the Assets
of Existing PA. If such an acquisition proposal is received by, or information
is requested from Existing PA or any of its affiliates, or shareholders,
officers or directors, Existing PA shall promptly notify Raytel of such fact and
specify the nature of such proposal and/or the information requested and the
name of the person or entity making such proposal and/or requesting such
information.

            Section 5.04 Covenant Not To Compete. Existing PA and the
Physicians, both jointly and severally, agree that they will obtain from each of
the present physicians employed by Existing PA or serving as an independent
contractor to Existing PA a binding covenant not to compete substantially
similar to the terms of the Agreement and Covenant Not To Compete attached as an
exhibit to the Agreement for the Purchase and Sale of Assets (which is one of
the Transaction Documents set forth in Section 1.43, herein above).


                                   ARTICLE VI.
                             ADDITIONAL AGREEMENTS

            Section 6.01. Certain Notifications. At all times from the date
hereof until the Closing, each party shall promptly notify the others in writing
of the occurrence of any event which will or may result in the failure to
satisfy any of the conditions specified in Article VII.

            Section 6.02. Investment Representations and Covenants of
Physicians.

                        (a) Each Physician understands that the Securities will
            not be registered under the Securities Act or any state securities
            laws on the grounds that the issuance of the Securities is exempt
            from registration pursuant to Section 4(2) of the Securities Act or
            Regulation D promulgated under the Securities Act and applicable
            state securities laws, and that the reliance of Raytel on such
            exemptions is predicated in part on the Physician's representations,
            warranties, covenants and acknowledgments set forth in this Section
            6.02.

                        (b) Except as disclosed on the Investment
            Representations Schedule 

                                     - 20 -
<PAGE>   25
            attached hereto, each Physician represents and warrants that such
            Physician is an "accredited investor" as defined in Rule 501
            promulgated under the Securities Act.

                        (c) Each Physician represents and warrants that the
            Securities to be acquired by such Physician upon consummation of the
            transactions described in Article II of this Master Transaction
            Agreement will be acquired by such Physician for such Physician's
            own account, not as a nominee or agent, and without a view to resale
            or other distribution within the meaning of the Securities Act and
            the rules and regulations thereunder, and that such Physician will
            not distribute any of the Securities in violation of the Securities
            Act.
                        (d) Each Physician represents and warrants that the
            address set forth below such Physician's name in the Investment
            Representations Schedule is such Physician's principal residence.

                        (e) Each Physician (i) acknowledges that the Securities
            issued to such Physician at the Closing must be held indefinitely by
            such Physician unless subsequently registered under the Securities
            Act or an exemption from registration is available, (ii) is aware
            that any routine sales of Securities made pursuant to Rule 144 under
            the Securities Act may be made only in limited amounts and in
            accordance with the terms and conditions of that Rule and that in
            such cases where the Rule is not applicable, compliance with some
            other registration exemption will be required, and (iii) is aware
            that Rule 144 is not currently available for use by such Physician
            for resale of any of the Securities to be acquired by such Physician
            upon consummation of the transactions described in Article II of
            this Master Transaction Agreement.

                        (f) Each Physician represents and warrants to Raytel
            that such Physician has such knowledge and experience in financial
            and business matters such that such Physician is capable of
            evaluating the merits and risks of such Physician's investment in
            any of the Securities to be acquired by such Physician upon
            consummation of the transactions described in Article II of this
            Master Transaction Agreement.

                        (g) Each Physician confirms that such Physician has
            received and read the Company's Prospectus dated November 30, 1995,
            Annual Report for 1995, Proxy Statement dated April 5, 1996, and its
            Form 10-Q for the quarter ended March 31, 1996. Each Physician also
            confirms that Raytel has made available to such Physician the
            opportunity to ask questions of and receive answers from it
            concerning the terms and conditions of such Physician's investment
            in the Securities, and the Physician has received to such
            Physician's satisfaction, such additional information, in addition
            to that set forth herein, about Raytel's operations and the terms
            and conditions of the offering as such Physician has requested.

                        (h) In order to ensure compliance with the provisions of
            paragraph (c) hereof, each Physician agrees that after the Closing
            such Physician will not sell or otherwise transfer or dispose of
            Securities or any interest therein (unless such shares

                                     - 21 -
<PAGE>   26
            have been registered under the Securities Act) without first
            complying with either of the following conditions, the expenses and
            costs of satisfaction of which shall be fully borne and paid for by
            such Physician:

                                        (i) Raytel shall have received a written
                        legal opinion from legal counsel, which opinion and
                        counsel shall be satisfactory to Raytel in the exercise
                        of its reasonable judgment, or a copy of a "no-action"
                        or interpretive letter of the Securities and Exchange
                        Commission specifying the nature and circumstances of
                        the proposed transfer and indicating that the proposed
                        transfer will not be in violation of any of the
                        registration provisions of the Securities Act and the
                        rules and regulations promulgated thereunder; or

                                        (ii) Raytel shall have received an
                        opinion from its own counsel to the effect that the
                        proposed transfer will not be in violation of any of the
                        registration provisions of the Securities Act and the
                        rules and regulations promulgated thereunder.

Each Physician also agrees that the certificates or instruments representing the
Securities to be issued to such Physician pursuant to this Master Transaction
Agreement may contain a restrictive legend noting the restrictions on transfer
described in this Article and required by federal and applicable state
securities laws, and that appropriate "stop-transfer" instructions will be given
to Raytel's transfer agent, if any, provided that this paragraph (h) shall no
longer be applicable to any Securities following their transfer pursuant to a
registration statement effective under the Securities Act or in compliance with
Rule 144 or if the opinion of counsel referred to above is to the further effect
that transfer restrictions and the legend referred to herein are no longer
required in order to establish compliance with any provisions of the Securities
Act.

            Section 6.03. No Corporate Practice. No Physician Party has
knowledge that the actions, transactions or relationships arising from, and
contemplated by the Transaction Documents violate any law, rule or regulation
relating to the corporate practice of medicine. Each Physician Party accordingly
agrees that such Physician Party will not, in an attempt to void or nullify any
Transaction Document or any relationship involving any Raytel Party or any
Physician Party, sue, claim, aver, allege or assert that any such Transaction
Document or any such relationship violates any law, rule or regulation relating
to the corporate practice of medicine; provided, however, such Physician Party
is entitled to make any such claim, assessment, allegation or assertion if such
Physician Party reasonably believes, on advice from counsel, that failure to
terminate such Transaction Document or such relationship will subject such
Physician Party to material liability or will materially adversely affect such
Physician Party's right to practice medicine.

            Section 6.04. Development of Cardiac Catheterization Laboratory.
Raytel agrees that it will use its best efforts to investigate the feasibility
of obtaining the necessary certification, accreditation and licensing for a
free-standing invasive cardiac catheterization 

                                     - 22 -
<PAGE>   27
laboratory (the "Cath Lab"). However, in the event that Raytel determines in
good faith and after reasonable inquiry that it is either not economically
feasible to develop the Cath Lab, or that it is not legally possible for to meet
the requirements of federal or state laws prohibiting physician self-referral to
facilities such as the Cath Lab in which the physicians have a financial
interest (whether an equity ownership or profit participation of any sort), or
that it is not legally possible to comply with the Medicare Fraud and Abuse
provisions for a Cath Lab that is for the exclusive use of the Physicians, then
Raytel may terminate this Agreement. On the other hand, if Raytel determines
that such a Cath Lab is economically feasible and that all legal requirements
can be met to its satisfaction, then Raytel agrees that it will negotiate in
good faith with New PA to develop the ownership structure, management services
agreement, financial models and practice protocols for the Cath Lab in
accordance with the term sheet attached to the letter of intent dated June 18,
1996, between and among Raytel, the Physicians and Existing PA.


                                  ARTICLE VII.
                                   CONDITIONS

            Section 7.01 Conditions Precedent to the Obligations of All Parties.
The obligations of the parties to complete the Closing shall be subject to the
fulfillment, at or prior to the time of the Closing, of each of the following
conditions:

                        (a) all permits, approvals, waivers and consents of any
            Governmental Authority or of any third party necessary or
            appropriate for consummation of the Closing shall have been
            obtained;

                        (b) no preliminary or permanent injunction or other
            order of a court or other Governmental Authority in the United
            States shall have been issued and be in effect, and no United States
            federal or state statute, rule or regulation shall have been enacted
            or promulgated after the date hereof and be in effect, that (i)
            prohibits the consummation of the Closing or (ii) imposes material
            limitations after the Closing on the ability of Existing PA to
            operate the Practice or Raytel Management to manage the Practice
            pursuant to the Management Services Agreement; and

                        (c) there shall not be any action or proceeding
            commenced by or before any court or other Governmental Authority in
            the United States that challenges the consummation of the Closing or
            seeks to impose material limitations on the ability of Existing PA
            to operate the Practice or Raytel Management to manage the Practice
            pursuant to the Management Services Agreement.

            Section 7.02 Conditions Precedent to the Obligations of the Raytel
Parties. The obligations of the Raytel Parties to complete the Closing shall be
subject to the fulfillment, at or prior to the time of the Closing, of each of
the following conditions:

                                     - 23 -
<PAGE>   28
                        (a) except for such changes as permitted or contemplated
            by this Master Transaction Agreement, the representations and
            warranties of the Physician Parties contained in this Master
            Transaction Agreement shall be true and correct in all material
            respects at and as of the Closing Date with the same force and
            effect as if made at and as of the Closing Date;

                        (b) the Physician Parties shall have performed, complied
            with and fulfilled all the covenants, agreements, obligations and
            conditions required by any of the Transaction Documents to be
            performed, complied with or fulfilled by them prior to or at the
            Closing;

                        (c) since the date of this Master Transaction Agreement,
            there shall not have occurred any event or events, whether
            individually or in the aggregate, that have had or that reasonably
            could be expected to have a material adverse effect on the financial
            condition, results of operations, properties, assets, liabilities,
            business, operations, ownership, organization or capital structure
            or prospects of Existing PA or the Practice; and

                        (d) the Raytel Parties shall have received all of the
            instruments, documents and other items described in Section 8.02
            hereof.

            Section 7.03. Conditions Precedent to the Obligations of the
Physician Parties. The obligations of the Physician Parties to complete the
Closing shall be subject to the fulfillment at or prior to the time of the
Closing, of each of the following conditions:

                        (a) except for such changes as permitted or contemplated
            by this Master Transaction Agreement, the representations and
            warranties of the Raytel Parties contained in this Master
            Transaction Agreement shall be true and correct in all material
            respects at and as of the Closing Date with the same force and
            effect as if made at and as of the Closing Date;

                        (b) the Raytel Parties shall have performed, complied
            with and fulfilled all of the covenants, agreements, obligations and
            conditions required by any of the Transaction Documents to be
            performed, complied with or fulfilled by them prior to or at the
            Closing;

                        (c) since the date of this Master Transaction Agreement,
            there shall not have occurred any event or events, whether
            individually or in the aggregate, that have had or that reasonably
            could be expected to have a material adverse effect on the financial
            condition, results of operations, properties, assets, liabilities,
            business, operations or prospects of Raytel; and

                        (d) the Physician Parties shall have received from the
            Raytel Parties all of the instruments, documents and other items
            described in Section 8.03 hereof.

                                     - 24 -
<PAGE>   29
                                  ARTICLE VIII.
                                    CLOSING

            Section 8.01 Closing.

                        (a) The Closing shall take place at the offices of
            Orgain, Bell & Tucker, L.L.P., 470 Orleans Street, Beaumont, Texas
            77001, immediately following the satisfaction of each condition set
            forth in Article VII hereof (the "Closing Date").

                        (b) At the Closing, the parties shall complete the
            transactions provided for in Sections 2.02 and 2.03 in the sequence
            specified in Article II hereof.

            Section 8.02 Deliveries to the Raytel Parties at the Closing. At the
Closing, and simultaneously with the deliveries to the Physician Parties
specified in Section 8.03 hereof, and in addition to any other deliveries
required to be made to an Raytel Party pursuant to any other Transaction
Document at the Closing, the Physician Parties shall deliver or cause to be
delivered to the Raytel Parties the following:

                        (a) the New P Partnership Agreement duly executed by
            each Physician;

                        (b) the New PA Articles of Association, New PA Bylaws,
            New PA Consent;

                        (c) the Management Services Agreement duly executed by
            New P and New PA;

                        (d) the Employment Agreements duly executed by New PA
            and each Physician;

                        (e) the Asset Purchase Agreement duly executed by
            Existing PA, together with the Agreement and Covenant Not To Compete
            duly executed by each Physician;

                        (f) the Security Agreement duly executed by the
            Physicians;

                        (g) the Conveyance Agreement duly executed by New PA and
            Existing PA; 

                        (h) the Partnership Interest Purchase Agreement duly
            executed by each Physician; and

                        (i) such other closing documents, certificates and
            instruments as are contemplated by the other Transaction Documents
            or as shall have been reasonably requested by the Raytel Parties and
            as are customarily delivered in connection with 
                                     - 25 -
<PAGE>   30
            transactions of the type contemplated herein.

            Section 8.03 Deliveries to the Physician Parties at the Closing. At
the Closing, and simultaneously with the deliveries to the Raytel Parties
specified in Section 8.02, and in addition to any other deliveries required to
be made to a Physician Party pursuant to any other Transaction Document at the
Closing, the Raytel Parties shall deliver or cause to be delivered to the
Physician Parties the following:

                        (a) the Asset Purchase Agreement duly executed by Raytel
            Management;

                        (b) the Security Agreement duly executed by Raytel
            Management;

                        (c) the Partnership Interest Purchase Agreement duly
            executed by Raytel Management;

                        (d) the consideration required to be delivered by the
            Raytel Parties at the Closing pursuant to the Transaction Documents;
            and

                        (e) such other closing documents, certificates and
            instruments as are contemplated by the other Transaction Documents
            or as shall have been reasonably requested by the Physician Parties
            and as are customarily delivered in connection with transactions of
            the type contemplated herein.

                                   ARTICLE IX.
                                  TERMINATION

            Section 9.01 Termination by Mutual Agreement. This Master
Transaction Agreement may be terminated by the mutual agreement in writing of
the parties hereto at any time prior to the Closing.

            Section 9.02 Termination by Raytel Parties. If at any time prior to
or at the Closing (a) any of the Physician Parties shall have failed to perform
in any respect any of their respective covenants or obligations, at the time
required to be performed, set forth in this Master Transaction Agreement or the
other Transaction Documents and such failure has not been or cannot be cured to
the reasonable satisfaction of the Raytel Parties within a reasonable time; (b)
any material representation or warranty of any of the Physician Parties
contained herein or in any of the other Transaction Documents is false or
misleading in any material respect; (c) any of the Physician Parties shall fail
to make any deliveries, at the time required to be delivered, specified in
Section 8.02; or (d) any of the conditions set forth in Sections 7.01 or 7.02
shall not have been satisfied in any respect (and such failure cannot be cured
to the reasonable satisfaction of the Raytel Parties prior to Closing) or waived
in writing by the Raytel Parties, all obligations of the Raytel Parties under
this Master Transaction Agreement (other than their obligations under Sections
12.02 and 12.11) may be terminated by the Raytel Parties.

                                     - 26 -
<PAGE>   31
            Section 9.03 Termination by the Physician Parties. If at any time
prior to or at the Closing (a) any of the Raytel Parties shall have failed to
perform in any respect any of their respective covenants or obligations, at the
time required to be performed, set forth in this Master Transaction Agreement or
the other Transaction Documents and such failure has not been or cannot be cured
to the reasonable satisfaction of the Physician Parties within a reasonable
time; (b) any material representation or warranty of any of the Raytel Parties
contained herein or in any of the other Transaction Documents is false or
misleading in any material respect; (c) any of the Raytel Parties shall fail to
make any deliveries, at the time required to be delivered, specified in Section
8.03; or (d) any of the conditions set forth in Sections 7.01 or 7.03 shall not
have been satisfied in any respect (and such failure cannot be cured to the
reasonable satisfaction of the Physician Parties prior to Closing) or waived in
writing by the Physician Parties, all obligations of the Physician Parties under
this Master Transaction Agreement (other than their obligations under Sections
12.02 and 12.11) may be terminated by the Physician Parties.

            Section 9.04 Termination Date. This Master Transaction Agreement may
be terminated by either the Raytel Parties or the Physician Parties giving
written notice to the other in the event the Closing has not occurred by August
31, 1996, unless due to the breach of this Master Transaction Agreement by any
of the parties seeking termination.

                                   ARTICLE X.
                                INDEMNIFICATION

            Section 10.01 Indemnification by the Physician Parties. Subject to
the limitations set forth in Section 10.06, each of the Physician Parties,
jointly and severally, hereby agrees to indemnify, defend and hold the Raytel
Parties, and their respective officers, directors, employees and shareholders
(collectively, "Raytel Indemnified Persons") harmless from and against all
demands, suits, claims, actions or causes of action, assessments, losses,
damages, liabilities, liens, settlements, penalties, and forfeitures, and
reasonable costs and expenses incident thereto (including reasonable attorneys'
fees) (collectively, the "Indemnity Losses" and individually, an "Indemnity
Loss"), asserted against or suffered or incurred, directly or indirectly, by any
of the Raytel Indemnified Persons and resulting from:

                        (a) any misrepresentation in or breach of the
            representations or warranties of any of the Physician Parties or the
            failure of any of the Physician Parties to perform any of their
            respective covenants or obligations contained in this Master
            Transaction Agreement, the Asset Purchase Agreement or the
            Partnership Interest Purchase Agreement;

                        (b) except with respect to those liabilities
            specifically assumed by Raytel Management pursuant to the Asset
            Purchase Agreement, the operation of the Practice prior to the
            Closing including, but not limited to, any and all obligations or
            liabilities of any of the Physician Parties of any kind, description
            or character, direct or indirect, 

                                     - 27 -
<PAGE>   32
            absolute or contingent, known or unknown;

                        (c) any tax liability arising out of, or by virtue of,
            or based on any Physician Party; or

                        (d) any Environmental Claim (as hereinafter defined)
            arising out of or based upon operation of the Practice on or prior
            to the Closing Date. For purposes of this Master Transaction
            Agreement, the term "Environmental Claim" means any liabilities,
            responsibilities, third party (including private parties,
            governmental agencies and employees) actions, lawsuits, claims or
            proceedings (whether they arise under common law or statute or are
            recognized now or at a later time and regardless of form including
            strict liability and negligence) that relate to or arise from or in
            connection with any environmental law or hazardous wastes,
            including, but not limited to, any liability which relates to or
            arises from or in connection with any investigation, remediation, or
            removal of any hazardous wastes.

            Section 10.02 Indemnification by the Raytel Parties. Subject to the
limitations set forth in Section 10.06, the Raytel Parties, jointly and
severally, hereby agree to indemnify, defend and hold the Physician Parties and
their respective officers, directors, employees, partners and shareholders
(collectively "Physician Indemnified Persons") harmless from and against any
Indemnity Loss asserted against or suffered or incurred by any of Physician
Indemnified Persons and resulting from any misrepresentation in or breach of the
representations and warranties of any of the Raytel Parties or the failure of
any of the Raytel Parties to perform any of their respective covenants or
obligations contained in this Master Transaction Agreement, the Asset Purchase
Agreement, the Partnership Interest Purchase Agreement, the Management Services
Agreement of the Raytel Parties in connection with the consummation of the
transactions contemplated by the Transaction Documents.

            Section 10.03 Notice. If any person or entity has reason to believe
that he, she or it has suffered or incurred (or has a reasonable belief that he
or it will suffer or incur) any Indemnity Loss subject to indemnity hereunder,
such person or entity shall so notify the indemnifying party promptly in writing
describing such loss or expense, the amount thereof, if known, and the method of
computation of such Indemnity Loss, all with reasonable particularity. If the
nature of the Indemnity Loss set forth in the notice does not involve any third
party claim, and if the indemnifying party does not respond to the indemnified
party in writing contesting the existence of amount of any Indemnity Loss within
thirty (30) days after delivery of such notice, then such indemnifying party
shall be obligated to pay, and shall pay in accordance with Section 10.05, the
amount of the Indemnity Loss set forth in such notice to the indemnified party.
If any action at law, suit in equity, administrative action or arbitration or
mediation proceeding is instituted by or against a third party with respect to
which any person intends to claim any liability or expense as an Indemnity Loss
under this Article X, such person shall promptly notify the indemnifying party
of such action. The failure to give or

                                     - 28 -
<PAGE>   33
to timely give any notice required by this Section 10.03 shall not relieve the
party from whom indemnity is sought of any of its obligations under this Article
X, except to the extent that such failure results in actual prejudice to the
indemnifying party.

            Section 10.04 Defense of Third Party Claims.

                        (a) With respect to any action at law, suit in equity,
            administrative action or arbitration or mediation proceeding that is
            instituted by or against a third party with respect to which any
            person intends to claim any liability or expense under this Article
            X, the indemnifying party shall have ten (10) business days after
            receipt of the notice with respect thereto referred to in the first
            sentence of Section 10.03 to notify the indemnified party that it
            elects to conduct and control any action, suit or proceeding with
            respect to such claim; provided, however, that no such election may
            be made with respect to any action, suit or proceeding by a taxing
            authority with respect to any consolidated, combined or unitary
            return filed by Raytel or any of its affiliates. If the indemnifying
            party does not give such notice, the indemnified person shall have
            the right to defend, contest, settle or compromise such action, suit
            or proceeding in the exercise of its exclusive discretion, and the
            indemnifying party shall, upon request from the indemnified person,
            promptly pay the indemnified person in accordance with the other
            terms and conditions of this Article X the amount of any Indemnity
            Loss subject to indemnity hereunder resulting from its liability to
            the third party claimant. If the indemnifying party gives such
            notice, it shall have the right to participate in, and, to the
            extent that it shall desire, to undertake, conduct and control,
            through counsel of its own choosing (which counsel shall be
            satisfactory to the indemnified party in the reasonable judgment of
            the indemnified party and shall not, except with the consent of the
            indemnified party, be counsel to the indemnified party) and at its
            sole expense, the conduct and settlement of such action, suit or
            proceeding, and the indemnified person shall cooperate with the
            indemnifying party in connection therewith; provided, however, that
            (i) the indemnifying party shall not thereby permit to exist any
            lien, encumbrance or other adverse charge securing the claims
            indemnified hereunder upon any asset of the indemnified person, (ii)
            the indemnifying party shall not thereby consent to the imposition
            of any injunction against the indemnified person without the written
            consent of the indemnified person, (iii) the indemnifying party
            shall permit the indemnified person to participate in such conduct
            or settlement through counsel chosen by the indemnified person, but
            the fees and expenses of such counsel shall be borne by the
            indemnified person except as provided below, and (iv) upon a final
            determination of such action, suit or proceeding, the indemnifying
            party shall promptly reimburse to the extent required under this
            Article X the indemnified person for the full amount of any
            Indemnity Loss resulting from such action, suit or proceeding and
            all reasonable and related expenses incurred by the indemnified
            person, other than fees and expenses of counsel for the indemnified
            person incurred after the assumption of the conduct and control of
            such action, suit or proceeding by the indemnifying party (except as
            provided below); provided further, however, that such fees and
            expenses of counsel for the indemnified party shall be borne by the
            indemnifying party if (i) the employment of 

                                     - 29 -
<PAGE>   34
            counsel by the indemnified party has been authorized in writing by
            the indemnifying party, (ii) the indemnified party has reasonably
            concluded (based on the advice of counsel) that there may be legal
            defenses available to it that are different from or in addition to
            those available to the indemnifying party, (iii) a conflict or
            potential conflict exists (based on advice of counsel to the
            indemnified party) between such party and the indemnifying party in
            which case the indemnifying party will not have the right to direct
            the defense of such action on behalf of the indemnified party, or
            (iv) the indemnifying party has not in fact employed counsel to
            assume the defense of such action within a reasonable time after
            giving notice of its intent to assume such defense. So long as the
            indemnifying party is contesting any such action in good faith, the
            indemnified person shall not pay or settle any such action, suit or
            proceeding. Notwithstanding the foregoing, the indemnified person
            shall have the right to pay or settle any such action, suit or
            proceeding, provided that in such event the indemnified person shall
            waive any right to indemnity therefor from the indemnifying party
            and no amount in respect thereof shall be claimed as an Indemnity
            Loss under this Article X.

                        (b) If requested by the indemnifying party, the
            indemnified person agrees to cooperate with the indemnifying party
            and its counsel in contesting any claim which the indemnifying party
            elects to contest or, if appropriate, in making any counterclaim
            against the person asserting the claim, or any cross-complaint
            against any person asserting the claim, or any cross-complaint
            against any person and further agrees to take such other action as
            reasonably may be requested by an indemnifying party to reduce or
            eliminate any loss or expense for which the indemnifying party would
            have responsibility, but the indemnifying party will reimburse the
            indemnified person for any expenses incurred by it in so cooperating
            or acting at the request of the indemnifying party.

                        (c) The indemnified person agrees to afford the
            indemnifying party and its counsel the opportunity to be present at,
            and to participate in, conferences with all persons, including
            governmental authorities, asserting any claim against the
            indemnified person or conferences with representatives of or counsel
            for such persons.

            Section 10.05 Payment of Losses. Except as specifically set forth in
any other section of this Master Transaction Agreement, the Asset Purchase
Agreement or the Partnership Interest Purchase Agreement with respect to payment
of losses, which section shall govern payment of losses with respect to matters
set forth therein, the indemnifying party shall pay to the indemnified person in
cash the amount of any Indemnity Loss to which the indemnified person may become
entitled by reason of the provisions of this Agreement, such payment to be made
within sixty (60) business days after any such amount of losses is finally
determined either pursuant to mutual agreement of the parties, pursuant to the
second sentence of Section 10.03, pursuant to the provisions of Section 10.04(a)
or pursuant to the dispute resolution provisions set forth in Article XI or
pursuant to a final, nonappealable binding judgment of a court with
jurisdiction. If any of the Physicians is the indemnifying party and fails to
make payment as contemplated by this Section 10.05, Raytel, at its election,
shall be 

                                     - 30 -
<PAGE>   35
entitled to (i) terminate its obligation to deliver such number of shares of
Raytel Common Stock, valued at the Market Price per share as of the date payment
was due under this Section 10.05, representing the amount equal to or less than
the amount of Indemnity Loss, or (ii) set off all or any amounts payable under
the Note held by such Physician, representing the amount equal to or less than
the amount of the Indemnity Loss, or both of the foregoing, but in no event
shall Raytel be entitled to offset amounts in excess of the Indemnity Loss
pursuant to this Section 10.05. Such indemnifying party agrees to redeliver to
Raytel any Note that, as a result of the exercise of set-off rights, is paid in
full.

            Section 10.06 Limitations. Notwithstanding anything contained to the
contrary in this Master Transaction Agreement, a Party's right to recover any
amounts under the indemnification provisions of this Article X shall be limited
as provided in this Section 10.06.

                        (a) All representations, warranties and associated
            indemnities made by the parties shall survive the Closing and shall
            thereafter terminate and expire twenty-four (24) months after the
            Closing Date, except that indemnities with respect to tax matters
            and environmental matters, shall survive for a period equal to the
            statute of limitations applicable to any claim arising from or
            attributable to such matters; provided, however, that
            notwithstanding the foregoing, the rights and obligations with
            respect to indemnification as provided in Article X shall continue
            with respect to any matter for which indemnification has been
            properly sought pursuant to the terms and conditions of this Master
            Transaction Agreement prior to the expiration of any such survival
            period.

                        (b) The Physician Parties' liabilities to Raytel
            Indemnified Persons pursuant to this Article X shall be limited as
            follows: with respect to any claim for indemnification under Section
            10.01, no Raytel Indemnified Person shall be entitled to
            indemnification pursuant to Article X until the Raytel Indemnified
            Parties in the aggregate have suffered or incurred Indemnity Losses
            of $25,000, and each Physician Party's obligations under this
            Article X shall be limited to the amount set forth opposite such
            Physician Party's name on the Disclosure Schedule; provided,
            however, that nothing contained in this Section 10.06(b) shall be
            deemed to limit or impair an Raytel Party's right to seek injunction
            or other equitable relief for a Physician's breach of any provision
            set forth in the Non-Competition Covenant attached to the Asset
            Purchase Agreement or in the Partnership Interest Purchase
            Agreement.

                        (c) The Raytel Parties' liabilities to Physician
            Indemnified Persons pursuant to this Article X shall be limited as
            follows: with respect to any claim for indemnification under Section
            10.02, no Physician Indemnified Person shall be entitled to
            indemnification pursuant to Article X until the Physician
            Indemnified Persons in the aggregate have suffered or incurred
            Indemnity Losses of $25,000.

                                     - 31 -
<PAGE>   36
                                   ARTICLE XI.
                                   ARBITRATION

            Section 11.01 Scope. Unless otherwise specifically provided in any
other Transaction Document, the parties hereto agree that any claim,
controversy, dispute or disagreement between or among any of the parties to any
of the Transaction Documents arising out of or relating to any Transaction
Document (other than claims involving any noncompetition or confidentiality
covenant) shall be governed exclusively by the terms and provisions of this
Article XI; provided, however, that the terms and provisions of this Article XI
shall not preclude any party hereto from seeking, or a court of competent
jurisdiction from granting, a temporary restraining order, temporary injunction
or other equitable relief for any breach of (i) any noncompetition or
confidentiality covenant in any Transaction Document or (ii) any duty,
obligation, covenant, representation or warranty, the breach of which may cause
irreparable harm or damage.

            Section 11.02 Arbitrators. In the event any claim or claims for an
Indemnity Loss is brought by any of the Raytel Parties or any of the Physician
Parties, or there is any other claim, controversy, dispute or disagreement among
any of the Raytel Parties or the Physician Parties arising out of or relating to
any Transaction Document, and the parties are unable to resolve such claim,
controversy, dispute or disagreement within thirty (30) days after notice is
first delivered pursuant to Section 10.03, then such Physician Parties shall
select one arbitrator, and the Raytel Parties shall select one arbitrator, and
the two arbitrators shall select a third arbitrator (the "Presiding Arbitrator")
who is experienced in the matter or action that is subject to such arbitration
and who then shall have sole and complete jurisdiction over the arbitration. If
such claim, controversy, dispute or disagreement is between any of the Physician
Parties, on the one hand, and any of the Raytel Parties, on the other hand, then
such Physician Parties shall select one arbitrator, and the Raytel Parties shall
select one arbitrator, and the two arbitrators shall select a third arbitrator
(the "Presiding Arbitrator") who is experienced in the matter or action that is
subject to such arbitration and who then shall have sole and complete
jurisdiction over the arbitration. If such claim, controversy, dispute or
disagreement is between any of the Physicians, on the one hand, and Existing PA
or New PA (as the case may be), on the other hand, then the Physician shall
select one arbitrator, and Existing PA or New PA (as the case may be) shall
select one arbitrator. The two arbitrators so chosen shall then select a third
arbitrator (the "Presiding Arbitrator") who is experienced in the matter or
action that is subject to such arbitration and who then shall have sole and
complete jurisdiction over the arbitration. If such matter or action involves
healthcare issues, then the Presiding Arbitrator shall have such qualifications
as would satisfy the requirements of the National Health Lawyers Association
Alternative Dispute Resolution Service. Each of the arbitrators chosen shall be
impartial and independent of all parties to the Transaction Documents. If either
of the parties fails to select an arbitrator within twenty days after the end of
such thirty-day period, or if the arbitrators chosen fail to select a third
arbitrator within twenty days, then any party may in writing request the judge
of the United States District Court for the Eastern District of Texas senior in
term of service to appoint the Presiding Arbitrator and, subject to this Article
XI, such Presiding Arbitrator shall hear all arbitration 

                                     - 32 -
<PAGE>   37
matters arising under this Article XI.

            Section 11.03 Applicable Rules.

                        (a) Each arbitration hearing shall be held at a place in
            Houston, Texas acceptable to the Presiding Arbitrator. The
            arbitration shall be conducted in accordance with the Commercial
            Arbitration Rules of the American Arbitration Association to the
            extent such rules do not conflict with the terms hereof. The
            decision of the Presiding Arbitrator shall be reduced to writing and
            shall be binding on the parties. Judgment upon the award(s) rendered
            by the Presiding Arbitrator may be entered and execution had in any
            court of competent jurisdiction or application may be made to such
            court for a judicial acceptance of the award and an order of
            enforcement. The charges and expenses of the arbitrators shall be
            shared equally by the parties to the hearing.

                        (b) The arbitration shall commence within ten (10) days
            after the Presiding Arbitrator is selected in accordance with the
            provisions of this Article XI. In fulfilling the duties with respect
            to determining the amount of an Indemnity Loss, the Presiding
            Arbitrator may consider such matters as, in the opinion of the
            Presiding Arbitrator, is necessary or helpful to make a proper
            valuation. The Presiding Arbitrator may consult with and engage
            disinterested third parties to advise the Presiding Arbitrator. The
            Presiding Arbitrator shall add an interest factor reflecting the
            time value of money to the amount of any Indemnity Loss and shall
            not award any punitive damages.

                        (c) If a Presiding Arbitrator selected hereunder should
            die, resign or be unable to perform his or her duties hereunder, the
            two original arbitrators selected by the parties or such senior
            judge (or such judge's successor) shall select a replacement
            Presiding Arbitrator. The procedure set forth in this Article XI for
            selecting the Presiding Arbitrator shall be followed from time to
            time as necessary.

                        (d) As to any determination of the amount of an
            Indemnity Loss, or as to the resolution of any other claim,
            controversy, dispute or disagreement, that under the terms hereof is
            made subject to arbitration, no lawsuit based on such claimed
            Indemnity Loss or such resolution shall be instituted by any of the
            Raytel Parties or the Physician Parties, other than to compel
            arbitration proceedings or enforce the award of a majority of the
            arbitrators.

                        (e) All privileges under Texas and federal law,
            including attorney-client and work-product privileges, shall be
            preserved and protected to the same extent that such privileges
            would be protected in a federal court proceeding applying Texas law.
            The rules of evidence under the Federal Rules shall apply to the
            arbitration proceedings conducted pursuant to this Article XI.

                        (f) The parties shall have the right to conduct and
            enforce pre-hearing discovery in accordance with the then current
            Federal Rules of Civil Procedure, subject 

                                     - 33 -
<PAGE>   38
            to these limitations:

                                        (i)  Each party may serve no more than 
                        one set of interrogatories;

                                        (ii) Each party may depose the other
                        party's expert witnesses who will be called to testify
                        at the hearing, plus two fact witnesses without regard
                        to whether they will be called to testify (the Physician
                        Parties and the Raytel Parties will be entitled to a
                        total of not more than 24 hours of depositions of the
                        other party's witnesses); and

                                        (iii) Document discovery and other
                        discovery shall be under the control of an enforceable
                        by the Presiding Arbitrator.

            Discovery disputes shall be decided by the Presiding Arbitrator. The
            Presiding Arbitrator is empowered to:

                                        (i) issue subpoenas to compel 
                        pre-hearing document or deposition discovery;

                                        (ii) enforce the discovery rights and 
                        obligations of the parties; and

                                        (iii) otherwise to control scheduling 
                        and conduct the proceedings.

            Notwithstanding any thing to the contrary herein, the Presiding
            Arbitrator shall have the power and authority to, and to the fullest
            extent practicable shall abbreviate arbitration discovery in a
            manner which is fair to all parties in order to expedite the
            conclusion of each alternative dispute resolution proceeding.

                        (g) The hearing shall be conducted to preserve its
            privacy and to allow reasonable procedural due process. The parties
            hereto will maintain the substance of any proceedings hereunder in
            confidence and the arbitrators, prior to any proceedings hereunder,
            will sign an agreement whereby the arbitrators agree to keep the
            substance of any proceedings hereunder in confidence.

                                  ARTICLE XII.
                                 MISCELLANEOUS

            Section 12.01 Remedies Not Exclusive. No remedy conferred by any of
the specific provisions of this Master Transaction Agreement or any other
Transaction Document is intended to be exclusive of any other remedy, and each
and every remedy shall be cumulative and shall be in addition to every other
remedy given hereunder or now or hereafter existing at law or in equity or by
statute or otherwise. The election of any one or more remedies by any party
hereto shall not constitute a waiver of the right to pursue other available
remedies.

                                     - 34 -
<PAGE>   39
            Section 12.02 Expenses. Whether or not the transactions contemplated
by this Master Transaction Agreement are consummated, each of the parties hereto
shall pay the fees and expenses of its counsel, accountants and other experts
incident to the negotiation and preparation of the Transaction Documents and
consummation of the transactions contemplated thereby.

            Section 12.03 Parties Bound. Except to the extent otherwise
expressly provided herein, this Master Transaction Agreement shall be binding
upon and inure to the benefit of the parties hereto and their respective heirs,
representatives, administrators, guardians, successors and assigns; and no other
person shall have any right, benefit or obligation hereunder.

            Section 12.04 Notices. All notices, reports, records or other
communications that are required or permitted to be given to the parties under
this Master Transaction Agreement shall be sufficient in all respects if given
in writing and delivered in person, by telecopy, by overnight courier or by
registered or certified mail, postage prepaid, return receipt requested, to the
receiving party at the following address:

                        If to the Raytel Parties, addressed to:

                             Raytel Medical Corporation
                             2755 Campus Drive, Suite 200
                             San Mateo, California  94403-2515
                             Attn: Michael Kokesh, General Counsel
                             Telecopy: (415) 349-8850

                        With copies to:

                             Mayor, Day, Caldwell & Keeton, L.L.P.
                             700 Louisiana, Suite 1900
                             Houston, Texas 77002
                             Attention:  Diana M. Hudson
                             Telecopy: (713) 225-7047


                        If to the Physician Parties, addressed to:

                             Southeast Texas Cardiology Associates II, P.A.
                             2535 Calder Street
                             Beaumont, Texas  77702
                             Attn: Rodolfo Sotolongo, M.D.
                             Telecopy: ________________


                                     - 35 -
<PAGE>   40
                        With copies to:

                             Orgain, Bell & Tucker, L.L.P.
                             470 Orleans Street
                             Beaumont, Texas 77702
                             Attn: John Creighton, Esq.
                                   Lance Fox, Esq.
                             Telecopy: 409-838-6959

or to such other address as such party may have given to the other parties by
notice pursuant to this Section 12.04. Notice shall be deemed given on the date
of delivery, in the case of personal delivery or telecopy, or on the delivery or
refusal date, as specified on the return receipt, in the case of overnight
courier or registered or certified mail.

            SECTION 12.05 CHOICE OF LAW. THIS MASTER TRANSACTION AGREEMENT SHALL
BE CONSTRUED, INTERPRETED, AND THE RIGHTS OF THE PARTIES DETERMINED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF TEXAS EXCEPT WITH RESPECT TO MATTERS
OF LAW CONCERNING THE INTERNAL AFFAIRS OF ANY CORPORATE OR PARTNERSHIP ENTITY
WHICH IS A PARTY TO OR THE SUBJECT OF THIS MASTER TRANSACTION AGREEMENT, AND AS
TO THOSE MATTERS THE LAW OF THE STATE OF INCORPORATION OR ORGANIZATION OF THE
RESPECTIVE ENTITY SHALL GOVERN.

            Section 12.06 Entire Agreement; Amendments and Waivers. This Master
Transaction Agreement, together with the other Transaction Documents and all
exhibits and schedules hereto and thereto, constitutes the entire agreement
between the parties pertaining to the subject matter hereof and supersedes all
prior and contemporaneous agreements, understandings, negotiations and
discussions, whether oral or written, of the parties, and there are no
warranties, representations or other agreements between the parties in
connection with the subject matter hereof. No supplement, modification or waiver
of this Master Transaction Agreement shall be binding unless it shall be
specifically designated to be a supplement, modification or waiver of this
Master Transaction Agreement and shall be executed in writing by the party to be
bound thereby. No waiver of any of the provisions of this Master Transaction
Agreement shall be binding unless executed in writing by the party to be bound
thereby. No waiver of any of the provisions of this Master Transaction Agreement
shall be deemed or shall constitute a waiver of any other provision hereof
(whether or not similar), nor shall such waiver constitute a continuing waiver
unless otherwise expressly provided.

            Section 12.07 Reformation Clause. The parties acknowledge that
federal and state law and regulations applicable to business transactions in
which physicians and other healthcare providers own equity interests in
healthcare companies are in a state of flux, and that as such laws and
regulations, and interpretations of such laws and regulations by the courts and
regulatory authorities, evolve, the transactions contemplated by this Master
Transaction Agreement may be prohibited by, or become economically impractical
due to, such laws and regulations. If such event occurs, the parties each agree
to negotiate in good faith such changes to the structure and terms of the
transactions provided for in this Master 

                                     - 36 -
<PAGE>   41
Transaction Agreement as may be necessary to make these transactions, as
restructured, lawful under applicable laws and regulations, without materially
disadvantaging either party.

            Section 12.08 Assignment. The Master Transaction Agreement may not
be assigned by operation of law or otherwise except that Raytel shall have the
right to assign this Master Transaction Agreement, at any time, to any direct or
indirect wholly owned subsidiary of Raytel. No such assignment shall relieve
Raytel of its obligations hereunder.

            Section 12.09 Attorneys' Fees. Except as otherwise specifically
provided herein, if any action or proceeding is brought by any party with
respect to this Master Transaction Agreement or the other Transaction Documents,
or with respect to the interpretation, enforcement or breach hereof, the
prevailing party in such action shall be entitled to an award of all reasonable
costs of litigation or arbitration, including, without limitation, attorneys'
fees, to be paid by the losing party, in such amounts as may be determined by
the court having jurisdiction of such action or proceeding or by the arbitrators
deciding such action or proceeding.

            Section 12.10 Further Assurances. From time to time hereafter and
without further consideration, each of the parties hereto shall execute and
deliver such additional or further instruments of conveyance, assignment and
transfer and take such actions as any of the other parties hereto may reasonably
request in order to more effectively consummate the transactions contemplated by
the Transaction Documents or as shall be reasonably necessary or appropriate in
connection with the carrying out of the parties' respective obligations
hereunder or the purposes of this Master Transaction Agreement.

            Section 12.11 Announcements and Press Releases. Between the date
hereof and the Closing Date, none of the parties shall furnish any
communications to, or otherwise communicate with, the public with respect to the
transactions contemplated by this Master Transaction Agreement and the other
Transaction Documents, except to the extent necessary to obtain consents and
approvals required in order to complete the transactions. Any press releases or
any other public announcement concerning this Master Transaction Agreement or
the other Transaction Documents shall be approved by both Raytel and Existing
PA, which approval shall not be unreasonably withheld or delayed where such
communication is required by applicable law or is required as a condition of any
regulatory approval sought by a Raytel Party; provided, however, that if any
party reasonably believes that it has a legal obligation to make a press release
and the consent of the other party cannot be obtained, then the release may be
made without such approval. No such communication or public announcement shall
disclose the amount of the consideration unless, in the opinion of Raytel's
counsel, such disclosure is required by applicable law.

            Section 12.12 Return of Information and Confidentiality. If for any
reason whatsoever the transactions contemplated by this Master Transaction
Agreement and the other Transaction Documents is not consummated, (i) each party
shall promptly deliver (without retaining copies thereof) to the other party, or
certify to the other party that it has destroyed, 

                                     - 37 -
<PAGE>   42
all documents, work papers and other material obtained by such party or on its
behalf from the other party or any of its agents, employees or representatives
as a result hereof or in connection herewith, whether so obtained before or
after the execution hereof, and (ii) each party shall cause any such
confidential information obtained from the other party pursuant to this Master
Transaction Agreement or the other Transaction Documents or otherwise to be kept
confidential and will not use, permit the use of, such confidential information
in its business or in any manner or for any other purpose.

            Section 12.12 Antidilution.

                        (a) The existence of Raytel's obligation to issue shares
            of Raytel Common Stock pursuant to Section 2.03(c) of this Master
            Transaction Agreement shall not affect in any way the right or power
            of Raytel or its stockholders to make or authorize any or all
            adjustments, recapitalizations, reorganizations or other changes in
            Raytel's capital structure or its business, or any merger or
            consolidation of Raytel, or any issue of bonds, debentures,
            preferred or prior preference stock ahead of, or affecting the
            Raytel Common Stock, or the rights thereof, as the dissolution or
            liquidation of Raytel, or any sale or transfer of all or any part of
            its assets or business, or any other corporate act or proceeding,
            whether of similar character or otherwise.

                        (b) If Raytel effects a subdivision or consolidation of
            shares of Raytel Common Stock or other capital readjustment, the
            payment of a stock dividend, or other increase or reduction of the
            number of shares of Raytel Common Stock outstanding, without
            receiving compensation therefor in money, services or property, then
            the number of shares of Raytel Common Stock subject to issuance
            pursuant to Section 2.03(c) of this Master Transaction Agreement
            shall be appropriately adjusted in such a manner to entitle the
            Physicians to receive the same total number and class of shares as
            it would have received had it received shares of Raytel Common Stock
            immediately prior to the event requiring the readjustment. In the
            event of any capital reorganization or reclassification of the
            capital stock of Raytel, any consolidation or merger of Raytel with
            or into another corporation, or any sale, lease or disposition of
            all or substantially all of the assets of Raytel that is effected in
            such a manner that holders of shares of Raytel are entitled to
            receive additional shares, other securities and/or property
            (including cash) with respect to or in exchange for shares of Raytel
            Common Stock, Raytel shall, as a condition precedent to such
            transaction, cause effective provision to be made so that the
            Physicians shall thereafter have the right to receive the kind and
            amount of additional shares, other securities and/or other property
            receivable upon such event as it would have received had it received
            the shares of Raytel Common Stock immediately prior to the event.

            Section 12.13 No Tax Representations. Each party acknowledges that
it is relying solely on its advisors to determine the tax consequences of the
transactions contemplated hereunder and that no representation or warranty has
been made by any party as to the tax consequences of such transactions.

                                     - 38 -
<PAGE>   43
            Section 12.14 No Rights as Stockholder. No Physician shall have any
rights as a stockholder with respect to any shares of Raytel Common Stock until
the issuance of a stock certificate for such shares. Except as otherwise
provided in Section 12.12, no adjustments shall be made for dividends or
distributions or other rights for which the record date is prior to such date
any such stock certificate is issued.

            Section 12.15 Multiple Counterparts. This Master Transaction
Agreement may be executed in one or more counterparts, each of which shall be
deemed an original, but all of which together shall constitute one and the same
instrument.

            Section 12.16 Headings. The headings of the several Articles and
Sections herein are inserted for convenience of reference only and are not
intended to be a part of or to affect the meaning or interpretation of this
Master Transaction Agreement.

            Section 12.17 Severability. Each article, section, subsection and
lesser section of this Master Transaction Agreement constitutes a separate and
distinct undertaking, covenant or provision hereof. In the event that any
provision of this Master Transaction Agreement shall finally be determined to be
unlawful, such provision shall be deemed severed from this Master Transaction
Agreement, but every other provision of this Master Transaction Agreement shall
remain in full force and effect.

            IN WITNESS WHEREOF, the parties have caused this Master Transaction
Agreement to be duly executed as of August 21, 1996.

RAYTEL MEDICAL CORPORATION                           /s/ RODOLFO P. SOTOLONGO
a Delaware corporation                               --------------------------
                                                     RODOLFO P. SOTOLONGO, M.D.

By: /s/ Richard F. Bader
    ---------------------------------------------
Name:  Richard F. Bader                              /s/ WAYNE S. MARGOLIS
Title: Chairman and Chief Executive Officer          --------------------------
                                                     WAYNE S. MARGOLIS, M.D.
RAYTEL SOUTHEAST MANAGEMENT, L. P.
a Texas limited partnership
By:    Raytel Texas Physician Services, Inc.         /s/ MICHAEL L. SMITH
       Its General Partner                           --------------------------
                                                     MICHAEL L. SMITH, M.D.

By: /s/ Richard F. Bader
    ---------------------------------------------
Name:  Richard F. Bader                              /s/ MIGUEL CASTELLANOS
Title: Chairman and Chief Executive Officer          --------------------------
                                                     MIGUEL CASTELLANOS, M.D.

                       [signatures continued on next page]

                                     - 39 -
<PAGE>   44
                    [signatures continued from previous page]

                                         SOUTHEAST  TEXAS
                                         CARDIOLOGY ASSOCIATES, P.A.,
                                         a Texas professional association



                                         By: /s/ Rodolfo Sotolongo
                                             -----------------------------
                                         Name:  Rodolfo Sotolongo, M.D.
                                         Title: President



                                         SOUTHEAST  TEXAS
                                         CARDIOLOGY ASSOCIATES II, P.A.,
                                         a Texas professional association



                                         By: /s/ Rodolfo Sotolongo
                                             -----------------------------
                                         Name:  Rodolfo Sotolongo, M.D.
                                         Title: President

                                     - 40 -

<PAGE>   1
                                                                     EXHIBIT 2.2

                  AGREEMENT FOR THE PURCHASE AND SALE OF ASSETS

THIS AGREEMENT FOR THE PURCHASE AND SALE OF ASSETS (the "Agreement") is made and
entered into as of August 21, 1996, between and among SOUTHEAST TEXAS CARDIOLOGY
ASSOCIATES, P.A., a Texas professional association ("Seller" and occasionally
SETCA), RODOLFO SOTOLONGO, M. D. ("SOTOLONGO"), WAYNE MARGOLIS, M. D.
("MARGOLIS"), and MICHAEL SMITH, M. D. ("SMITH"), and RAYTEL SOUTHEAST
MANAGEMENT, L. P., a Texas limited partnership ("Buyer"), its corporate general
partner, RAYTEL TEXAS PHYSICIAN SERVICES, INC., a Delaware corporation ("RTPS"),
a wholly owned subsidiary of RAYTEL MEDICAL CORPORATION, a Delaware corporation
("RMC"), and collectively SETCA, SOTOLONGO, MARGOLIS, SMITH, RMC, RTPS and BUYER
are referred to as the "Parties", and SOTOLONGO, MARGOLIS and SMITH are
sometimes referred to as the "Shareholders".

                                    RECITALS

         A. WHEREAS, Seller owns certain assets used in connection with the
conduct of its cardiology medical practice with its principal practice located
at 2535 Calder Street, Beaumont, 2693 North Street, Beaumont, as well as at
locations in Orange, Port Arthur, and Jasper, TX (the "Practice"), and

         B. WHEREAS, Seller desires to sell, assign, transfer and convey the
nonmedical assets of the Practice set forth in the exhibits hereto, to Buyer,
and Buyer desires to purchase for good and valuable consideration those specific
nonmedical assets of the Practice from Seller, and the assumption by Buyer of
certain specific liabilities of Seller, as set forth in the exhibits hereto, on
the terms and conditions set forth herein.

NOW, THEREFORE, in consideration of the promises, mutual covenants,
representations, warranties and conditions contained herein, and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, and intending to be legally bound hereby, the parties hereby
covenant and agree as follows:

                                    AGREEMENT

                                    ARTICLE I
                        PURCHASE AND SALE OF THE ASSETS;
                            ASSUMPTION OF LIABILITIES

         1.1. PURCHASE AND SALE OF NONMEDICAL ASSETS. Subject to the terms and
conditions of this Agreement, Seller agrees to sell, transfer, convey, assign
and deliver to Buyer, and Buyer

                                      -1-
<PAGE>   2
agrees to purchase from Seller, on the date of Closing, the following items of
tangible and intangible assets and properties (hereinafter collectively referred
to as the "Nonmedical Assets"):

                  (a) The furniture, fixtures, leasehold improvements, office
supplies, and general office equipment; medical instruments, medical equipment,
medical supplies; the telephones, telephone switches, and telephone numbers; and
the other tangible assets and properties of, or pertaining to, the Practice, set
forth in "Exhibit 1.1(a)" of this Agreement;

                  (b) The accounting records, files, books, and work papers
pertaining to the Practice, including without limitation all credit records,
payroll records, operating manuals, procedure manuals, and the computer
databases, computer hardware, computer software and related documentation,
including source code and systems documentation, set forth in "Exhibit 1.1(b)"
of this Agreement;

                  (c) The leasehold interests for the premises in which the
Practice is located in Beaumont, Orange, Port Arthur, Jasper, TX, as set forth
in "Exhibit 1.1(c)" of this Agreement;

                  (d) The contracts, leases, insurance policies, purchase
orders, commitments and other agreements listed on Exhibit 1.1(d), to the extent
assignable;

                  (e) All marketing materials and referring physician lists,
customer lists, client lists and vendor accounts of the Practice, but
specifically excluding therefrom the patient lists, medical records, charts,
diagnostic imaging films and similar items (which are designated part of the
"Medical Assets" of the Practice, herein);

                  (f) All United States and foreign patents, patent
applications, trademarks and applications for trademarks, tradenames and
applications for tradenames, service marks and service names and applications
for service marks and service names, copyrights and applications for copyrights
and registrations; developments, discoveries, inventions, ideas and trade
secrets; goodwill and/or other intangible assets of the Practice, set forth in
"Exhibit 1.1(f)" of this Agreement;

                  (h) All transferable licenses, permits, certificates,
approvals and other governmental authorizations necessary to own and operate the
Practice as set forth in "Exhibit 1.1(h)" to this Agreement; and

                  (i) All prepaid expenses, prepaid insurance, deposits and
other similar items related to the Practice as of the Closing as set forth on
the Closing Statement (as hereafter defined).

                  (j) Cash and cash equivalents, bank accounts and certificates
of deposit.

         1.2. NONMEDICAL ASSETS. All of the foregoing assets, properties and
businesses to be

                                      -2-
<PAGE>   3
transferred hereunder are sometimes referred to herein as the "Nonmedical
Assets."

                  (a) To the extent the transfer of any of the Nonmedical Assets
requires the consent of another party thereto, then the assignment of such
Nonmedical Asset shall be subject to receipt of such consent and the transfer
and assignment shall not be effective until such consent has been obtained.
Seller agrees to cooperate fully with Buyer in seeking such consents or
reasonable arrangement designed to provide to Buyer the benefits, claims and
rights arising hereunder.

                  (b) Except as set forth in paragraph 1.4, all of the
Nonmedical Assets shall be delivered free and clear of any liens, claims,
pledges, security interests or encumbrances of any kind, except (i) liens for
current taxes not yet delinquent, (ii) liens imposed by law and incurred in the
ordinary course or business for obligations not yet due to vendors and the like,
and (iii) minor defects in title, none of which in the aggregate or individually
interfere with the use of the Nonmedical Assets.

         1.3. EXCLUDED ASSETS. Notwithstanding anything herein to the contrary,
Seller hereby retains all of its right, title and interest in and to, and there
shall be excluded from the sale, assignment or transfer to Buyer hereunder,
whether or not related to the Practice, all of the assets of Seller which are
not specifically described in sections 1.1(a) through (i) above; (which are
herein referred to as the "Medical Assets"):

                  (a) accounts receivable, goodwill attributable to or arising
from the practice of medicine or use of the Medical Assets, and the name of
Seller;

                  (b) the patient lists, medical records, charts, diagnostic
imaging films and similar items;

                  (c) all drugs, pharmaceuticals, controlled substances, medical
devices or similar items which requires the authorization, prescription or order
of a physician or other licensed health care provider or requires a permit,
registration, certification or other governmental authorization held by a
physician or other licensed health care provider as required by federal or state
law, or both;

                  (d) any licenses, certificates, approvals and other
governmental authorizations necessary or appropriate to own the Medical Assets
and to practice medicine;

                  (e) insurance policies covering or relating to medical
malpractice;

                  (f) tax refunds, other rebates, refunds or credits due, if
any, relating to any period prior to the Closing; and

                                      -3-
<PAGE>   4
                  (g) all contracts or agreements requiring performance by a
licensed health care provider under federal or state law.

1.4.        LIABILITIES.

                  (a) ASSUMED LIABILITIES. Subject to the terms and conditions
of this Agreement, Buyer agrees to assume on the Closing Date (as hereinafter
defined), and shall thereafter be responsible for paying and satisfying to the
extent not discharged prior to the Closing Date, the liabilities and obligations
of Seller (the "Assumed Liabilities") expressly set forth in this section 1.4,
as follows:

                           (1) accrued vacation and sick pay of Seller's current
employees;

                           (2) accrued accounts payable and accrued expenses of
Seller as of the Closing, as set forth on the Closing Statement;

                            (3) indebtedness owing to Bank One, Texas, N.A., in
an aggregate amount not to exceed [*] as shown on the Seller's financial
statements dated as of June 30, 1996, and the precise amount to be determined
prior to Closing, as set forth in Section 5.1(a)(8).

                           (4) all contractual liabilities and obligations of
Seller under the contracts, agreements and leases included in the Nonmedical
Assets and arising from and after the Closing Date and incurred or arising in
the ordinary course of business consistent with past practices and not incurred
in violation of any law or in breach of any duty, existing as of the Closing.

                  (b) EXCLUDED LIABILITIES. Except as specifically provided
herein, Buyer shall not assume or become liable for any of Seller's debts,
obligations or liabilities, known or unknown, fixed or contingent, arising in
any way out of Seller's use of the Medical Assets, the Nonmedical Assets or the
conduct of any trade, practice or business on the premises previously occupied
by the Practice on or before the Closing Date, including, without limitation:

                           (1) salary, bonus, or other compensation which shall
have accrued to Seller's employees for any period prior to the Closing (all such
salary, bonuses and other compensation payable by Seller to be excluded from
accrued expenses in the determination of Net Assumed Liabilities pursuant to
Section 2.5 below);

                           (2) any obligations or liabilities arising under any
pension plan, defined benefit plan, defined contribution plan, profit sharing
plan, retirement plan, deferred compensation arrangement, welfare plans and
other similar plans for any current employee, whether or not such employee
accepts employment with Buyer prior to the Closing Date;

[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                      -4-
<PAGE>   5
                           (3) payroll taxes and unemployment insurance plans
for any current employee, whether or not such employee accepts employment with
Buyer prior to the Closing Date;

                           (4) any federal, state, or local taxes, including,
but not limited to, income or franchise taxes or similar taxes based upon or
measured by revenue, income, profit or gain from the transfer of the Nonmedical
Assets or the operation of the Practice prior to the Closing, any secured or
unsecured personal property taxes, or other local, state, or federal tax;

                           (5) any and all environmental liabilities or
liabilities arising out of the use or disposal of petroleum or petroleum
products or any hazardous substance or hazardous waste by Seller, or claims by
Medicare, Medicaid, the Health Care Finance Administration, any insurance
company, managed care organization or other health care claims paying or claims
processing intermediary (as those terms are defined by applicable federal, state
and local law) relating to the acts or omissions of the Seller.

                  (c) DEFENSES AND CLAIMS. Nothing herein shall be deemed to
deprive Buyer of any defenses, set-offs or counterclaims (the "Defenses and
Claims") which Seller may have had or which Buyer shall have with respect to any
of the liabilities assumed pursuant to Section 1.4(a) above. Effective as of the
Closing, Seller agrees to assign, transfer and convey to Buyer all Defenses and
Claims and agrees to cooperate with Buyer to maintain, secure, perfect and
enforce such Defenses and Claims, including the execution of any documents, the
giving of any testimony or the taking of any such other action as is reasonably
requested by Buyer in connection with such Defenses and Claims.

                                   ARTICLE II
                           PURCHASE PRICE AND PAYMENT

         2.1. PURCHASE PRICE. In consideration for the purchase of the
Nonmedical Assets and the covenant not to compete set forth in section 8 hereof
or delivered hereunder (the "Covenant Not to Compete"), Buyer shall pay:

                  (a) to Seller at the Closing the sum of [*] in cash;

                  (b) Buyer shall assume the Assumed Liabilities, as provided in
                      section 1.4(a) hereof; and

The amount of cash set forth herein is a preliminary amount which may change
prior to the Closing in accordance with a schedule to be prepared by Buyer and
accepted by Seller, as a closing condition set forth in Section 5.1(a)(8).

[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                      -5-
<PAGE>   6
         2.2. PAYMENT OF PURCHASE PRICE. Subject to the terms and conditions set
forth herein, the Purchase Price shall be paid on the Closing Date, by wire
transfer of federal funds to accounts designated by Seller at least two (2)
business days prior to the Closing Date.

         2.3 TAX ALLOCATION. The parties agree to comply with the provisions of
Section 1060 of the Internal Revenue Code of 1986, as amended.

         2.4. PRORATIONS. There shall be prorated between Buyer and Seller,
based on the Closing Date of this Agreement, the amounts paid, or to be paid, by
or for the Practice to a third party, on the basis of 365 day year, or
thirty-day month, as the case may be, for the following:

                  (a) All personal property taxes, real property taxes, federal,
state and local taxes levied or assessed against the Practice or any of the
Assets described in this Agreement for the current year based on the amount
shown on the latest available bill for such item.

                  (b) Charges accruing on any service or other contracts shown
on Exhibit 1.1(d) to this Agreement.

         2.5. PURCHASE PRICE ADJUSTMENT. For purposes of this Section 2.5, the
term "Net Assumed Liabilities" refers to the result of Seller's (i) accounts
payable, plus (ii) accrued expenses less (iii) inventories, less (iv) prepaid
items, in each case as of the Closing Date. The Purchase Price
shall be adjusted as follows:

                  (a) REDUCTION IN PURCHASE PRICE. The Purchase Price shall be
reduced by the amount that the Net Assumed Liabilities, defined in the Preamble
to Section 2.5, above, exceed [*].

                  (b) INCREASE IN PURCHASE PRICE. The Purchase Price shall be
increased by the amount that the Net Assumed Liabilities, defined in the
Preamble to Section 2.5, above, are less than [*].

                  (c) CLOSING STATEMENT. For purposes of establishing the amount
of the Purchase Price Adjustment, Seller shall prepare and deliver to Buyer,
within thirty (30) days after the Closing, a statement as of the Closing Date
(the "Closing Statement"), which shall set forth, as of the Closing, the Net
Assumed Liabilities and shall calculate any resultant Purchase Price Adjustment.
The Closing Statement will be derived from the internal books and records of
Seller in accordance with and consistent with Seller's accounting practices.
Transfer taxes arising in connection with the Closing which are to be paid by
Seller shall not, however, be included in the Closing Statement. Buyer shall
give Seller and its representatives full access to the premises, systems, books
and records of the Practice in order to prepare the Closing Statement and to
calculate the Purchase Price Adjustment. Buyer shall have thirty (30) business
days after receipt

[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]


                                      -6-
<PAGE>   7

of such Closing Statement and proposed Purchase Price Adjustment in which to
give Seller written notice of any objection thereto (which notice shall specify
the factual basis for such objection and the amount at issue).

                  (d) DISPUTE RESOLUTION. If Buyer timely objects (as provided
in subparagraph (c) above) to such Closing Statement and Purchase Price
Adjustment, then Seller and Buyer shall promptly meet and attempt in good faith
to agree on the Purchase Price Adjustment. Any disputes with respect to the such
Closing Statement which are not resolved by Seller and Buyer and their
respective accountants within ninety (90) days after the Closing shall, upon
written request by either Seller or Buyer, be referred, for final resolution, to
such firm of independent certified public accountants as Seller and Buyer shall
jointly designate. In the event that the parties are unable to agree upon such
designated accounting firm, Arthur Andersen shall choose an independent
certified public accounting firm, of national recognition, to perform such
services. Each party shall, with twenty (20) days after such submission of such
dispute, deliver to such firm the information such party wishes to have
considered by such firm in making its determination. Such firm shall present its
determination and resolution of such disputes with thirty (30) business days
after the submission of such dispute to the firm. Seller and Buyer agree that
the determination and resolution by such firm shall be binding and conclusive
among the parties. The fees of the accounting firm selected to resolve such
disputes shall be borne one-half by Seller and one-half by Buyer. Failure to
timely object to the proposed Closing Statement and Purchase Price Adjustment
shall prevent Buyer from asserting any claim inconsistent with the amounts set
forth therein. If Buyer does not object to the proposed Closing Statement and
Purchase Price Adjustment prior to the close of business on the thirtieth (30)
business day following the delivery thereof, such proposed Closing Statement and
Purchase Price Adjustment shall be deemed final and binding on both parties and
shall constitute the Purchase Price Adjustment for all purposes of this
Agreement.

                  (e) SETTLEMENT. If the Purchase Price Adjustment results in an
increase in the Purchase Price, Buyer shall pay such amount by wire transfer
immediately from immediately available funds to the account designated by Seller
and such amount shall bear interest from the Closing Date to the date of Payment
at the rate of one percent per month. If the Purchase Price Adjustment results
in an decrease in the Purchase Price, Seller shall pay such amount by wire
transfer immediately from immediately available funds to the account designated
by Buyer and such amount shall bear interest from the Closing Date to the date
of Payment at the rate of one percent per month.

         2.6. SALES TAXES. Buyer and Seller agree that Seller shall be obligated
to pay all of the sales, use and other like taxes arising out of the sale of the
Nonmedical Assets to Buyer under the terms of this Agreement, and that Seller
shall be responsible for the remittance of the sales taxes arising out of the
sale of the Nonmedical Assets.

                                      -7-
<PAGE>   8
                                   ARTICLE III
                         REPRESENTATIONS AND WARRANTEES

         3.1. REPRESENTATIONS AND WARRANTIES.

              (a) SELLER'S REPRESENTATIONS AND WARRANTIES. Seller represents and
warrants to Buyer, on the date hereof, as follows:

                  (1) STANDING. Seller is a professional association duly
organized, validly existing and in good standing under the laws of the State of
Texas.

                  (2) SUBSIDIARIES. Seller does not own any equity interest,
directly or indirectly, in any corporation, partnership, joint venture or other
entity which is engaged in any aspect of the Practice.

                  (3) CORPORATE AUTHORITY. Seller has all necessary corporate
power and authority to own or lease its properties and to carry on its business
as now being conducted. Seller is duly qualified to do business and in good
standing in each state or jurisdiction wherein the nature of the business
conducted or the character of the property owned or leased makes such
qualification necessary, except in those jurisdictions where the failure to
qualify would not have a material and adverse affect on the Practice or the
Nonmedical Assets of Seller.

                  (4) AUTHORIZATION. Seller has full corporate power and
authority to enter into this Agreement and each of the other transaction
documents to which it is a party and to carry out the transactions contemplated
hereby and thereby. The Board of Directors and shareholders of Seller have taken
all action required by law, Seller's Articles of Association and Bylaws, or
otherwise, to authorize the execution and delivery of this Agreement and such
other transaction documents and the consummation of the transactions
contemplated hereby and thereby, and this Agreement and such other transaction
documents constitute the valid and binding obligation of Seller, enforceable in
accordance with their respective terms, except as enforceability may be limited
by (i) applicable bankruptcy, insolvency, moratorium, reorganization and other
similar laws affecting creditors' rights generally and (ii) general principles
of equity, regardless of whether asserted in a proceeding in equity or at law.

                  (5) EFFECT OF THIS AGREEMENT. Neither the execution and
delivery of this Agreement nor the consummation of the transactions contemplated
hereby nor compliance by Seller with any of the provisions hereof will violate,
breach or, with the giving of notice or passage of time, constitute an event of
default (or give rise to any right of termination, cancellation or acceleration)
under any of the terms, conditions or provisions of any agreement or other
instrument or obligation which have been assigned by Seller to Buyer, or by
which any of the Nonmedical Assets may be bound, except for the requirement of
consent or waiver to such transactions by the other party to the agreement or
instrument, and except for such violations,

                                      -8-
<PAGE>   9
breaches or defaults (or rights of termination, cancellation or acceleration)
which taken as a whole are not material to the Practice, Nonmedical Assets or
financial condition of Seller. Except for this Agreement, Seller has no binding
commitment as of the date of this Agreement and will have none as of the Closing
Date to sell the Practice or the Nonmedical Assets.

                  (6) TITLE TO NONMEDICAL ASSETS. Seller has good and marketable
title to all Nonmedical Assets, except to those covered by equipment leases
identified in Exhibit 1.1(a) or Exhibit 1.1(d) hereto (the "Leased Assets"), as
to which Seller has valid and subsisting leasehold interests. All of the
Nonmedical Assets are free and clear of restrictions on or conditions to
transfer or assignment, and free and clear of mortgages, liens, pledges,
encumbrances, claims, conditions or restrictions, except: (A) those for current
taxes not yet due and payable, or the validity of which is being contested in
good faith by appropriate proceedings; and (B) liens imposed by law, such as
materialmen's, mechanics', workers', repairmen's, employees', carriers',
vendors', warehousemen's, and other like liens arising in the ordinary course of
business in respect of obligations that are not yet due and payable and that do
not, individually or in the aggregate, materially interfere with the conduct of
the Practice, and the Assumed Liabilities as set forth in Section 1.4(a).

                  (7) FINANCIAL STATEMENTS. Seller has hereby delivered to Buyer
its unaudited financial statements for the years ended December 31, 1995, 1994
and 1993, respectively, and for the six (6) month period ended June 30, 1996 in
an unaudited form (the "Financial Statements"), and represents and warrants that
the Financial Statements fairly reflect in all material respects the financial
condition of the Seller on their respective dates. The Financial Statements
present fairly in all material respects the revenues and the results of the
operations of the Seller for the periods covered, in accordance with the books
and records of the Seller, and determined in accordance with cash basis
accounting principles consistently applied, as of the respective date of each
statement, subject in the case of the unaudited statements to any year end audit
adjustments and the lack of financial disclosures required pursuant to generally
accepted accounting principles.

                  (8) BOOKS OF ACCOUNT. To the knowledge of Seller, the books,
records and accounts of Seller accurately and fairly reflect, in reasonable
detail, the transactions and the assets and liabilities of Seller with respect
to the Practice. Seller has not engaged in any transaction with respect to the
Practice, maintained any bank account for the Practice or used any of the funds
of Seller in the conduct of the Practice except for transactions, bank accounts
and funds which have been and are reflected in the normally maintained books and
records of Seller.

                  (9) STATUS REGARDING LEASES. Seller is not in default under
any lease agreement to be assigned to Buyer under the terms of this Agreement
and that said lease agreements are the only lease agreements pertaining to such
leased space. To the knowledge of

                                      -9-
<PAGE>   10

Seller, neither the operations of the Practice on any of such leased real
property, nor any improvements thereon, violate in any material respect any
applicable building code, zoning requirement, or any statute applicable to such
real property.

                  (10) COMPLIANCE WITH APPLICABLE LAWS. Seller has not received
any notice of any violation of any law or order, writ, injunction or decree of
any court or Federal, state, municipal, or other governmental department,
commission, board, bureau, agency, or instrumentality (including without
limitation applicable laws and regulations regarding government contracting,
bribery and other prohibited foreign and domestic payment practices,
environmental protection, equal employment opportunity, civil rights, and
occupational safety and health).

                  (11) LITIGATION AND INVESTIGATIONS. Except as set for in
Exhibit 3.1(a)(11), Seller warrants that there are no lawsuits, proceedings,
claims or governmental investigations pending, or known to be threatened or
contemplated, against Seller or the Nonmedical Assets or the Practice, at law or
in equity, or before or by any governmental department, commission, board,
bureau, agency or instrumentality, domestic or foreign, that are known to
Seller, which, if determined adversely, could have a material adverse effect on
the Assets or the Practice or the ability of Buyer to carry on the Practice
following the Closing Date. Without limiting the generality of the foregoing,
there are no such claims or proceedings pending or threatened which assert
claims for product liability or malpractice arising out of the operations of the
Practice, except as set forth in said Exhibit.

                  (12) LICENSES AND GOVERNMENT AUTHORIZATIONS. Seller has all
licenses, permits, and authorizations known by Seller to be necessary for the
conduct of Seller's Practice as currently conducted, and for the operation of
the properties currently operated by Seller on its own account or on behalf of
others pursuant to leases or similar arrangements, and no suspension or
cancellation of any such license, permit, or authorization is pending or known
to be threatened, except for such licenses, permits, and authorizations the
failure of which to obtain would not have a material and adverse effect on the
Practice or the Nonmedical Assets.

                  (13) GENERAL CONSENTS AND FILINGS. All consents,
authorizations, registrations, qualifications, or filings with any federal or
state governmental authority on the part of Seller, known by Seller to be
required in connection with the consummation of the transactions contemplated
herein, are listed on Exhibit 3.1(a)(13) hereto.

                  (14) SUBSTANTIAL CONTRACTS AND OBLIGATIONS. Except as limited
by applicable bankruptcy, insolvency, reorganization, moratorium or other laws
of general application referring to, or affecting enforcement of, creditors'
rights, and by general equitable principles, to the best knowledge of Seller,
all substantial contracts are valid and binding upon Seller and the other
parties thereto, and are in full force and effect. Neither Seller nor any other
party to a substantial contract is known to be in violation of the terms thereof
or in default

                                      -10-
<PAGE>   11
thereunder, and Seller knows of no facts which upon notice or with the passage
of time would cause Seller or any other party thereto to be in default
thereunder, where such violation or default would have a material and adverse
effect on the conduct and operation of the Practice.

                  (15) LAWSUITS OR CLAIMS. Seller has complied with and is not
in violation of any applicable federal, state, or local statutes, laws or
regulations affecting the Practice, and has disclosed any and all knowledge
regarding any legal actions or other proceedings, in whatever stage or form,
pending, or to its knowledge threatened or affecting the Practice or the
Nonmedical Assets.

                  (16) LOSS, DAMAGE OR DESTRUCTION. Seller is not aware of any
damage, destruction or loss, whether or not covered by insurance, materially and
adversely affecting the Nonmedical Assets or the Practice.

                  (17) EMPLOYEES. Seller hereby warrants that attached hereto
and marked "Exhibit 3.1(a)(17)" is a true and complete list of all persons
employed (the "Employees") by Seller in Seller's Practice showing their names,
social security numbers, positions or job classifications, and salaries. To the
knowledge of Seller:

                       (A) No Employee is obligated under any contract or
agreement, or subject to any judgment, decree or order of any court or
administrative agency that would conflict with such employee's obligation to use
his or her best efforts to promote the interests of Seller or Buyer (assuming
such employee's employment by Buyer after the Closing) or with Buyer's conduct
of the Practice, as contemplated by this Agreement;

                       (B) No Employee is in violation of any term of any
employment agreement, non-competition agreement, or any other contract or
agreement relating to the relationship of any such employee with Seller or any
previous employer; and

                       (C) There are no pending or threatened suits or
administrative actions brought by any current Employee or former Employee
alleging any violation of federal, state or local law protecting such Employee
in their right to employment, wrongful termination of employment, failure to
maintain a safe work place, or similar causes of action, including but not
limited to Title VII of the U.S.C.A.

                  (18) LABOR DIFFICULTIES. None of Seller's employees are
represented by unions. There is no unfair labor practice complaint pending
before the National Labor Relations Board (the "NLRB") or overtly threatened
against or affecting Seller or the Practice. There is no labor strike, dispute,
slowdown or stoppage pending or overtly threatened against or affecting Seller.

                                      -11-
<PAGE>   12
                  (19) SERVICE CONTRACTS. Seller hereby warrants that attached
hereto and marked "Exhibit 1.1(d)" is a true and complete list of all leases,
service and other contracts pertaining to the Practice on which Seller is
obligated, showing (A) the names of the parties to each such contract; (B) the
services rendered (or to be rendered) under each such contract; (C) the
compensation payable by Seller under each such contract; and (D) the term and
expiration date of each such contract.

                  (20) ABSENCE OF LIENS. At or prior to the Closing, Buyer shall
have received a UCC search report dated as of a date not more than twenty-five
(25) days before the Closing Date issued by the Secretary of State of Texas
indicating that there are no filings under the Uniform Commercial Code on file
with such Secretary of State which name Seller as debtor or otherwise indicating
any lien on the Assets, except for the leases to be assumed by Buyer hereunder
and liens as to which UCC Termination Statements have been obtained from
lienholders subject only to payment of specified dollar amounts at the Closing.

                  (21) COVENANTS NOT TO COMPETE. Seller is not a party or
otherwise subject to any contract containing covenants by which Seller agrees
not to compete in any geographic area, line of business, or with any person or
business entity, which in any way relates to the Practice.

                  (22) TAX RETURNS. Seller warrants that it has filed with the
appropriate state and federal governmental agencies all material tax returns and
tax reports required to be filed by it and which pertain to the operations of
the Practice and that such returns have been lawfully filed and in all material
respects are true and accurate.

                  (23) ENVIRONMENTAL COMPLIANCE. There are no conditions,
circumstances, activities, practices, incidents, actions or plans, in each case
relating to the acts or omissions of Seller or the conduct by Seller of the
Practice, which pose a significant hazard to human health or the environment,
whether or not in compliance with law, existing on any real property presently
leased, operated or controlled by Seller and used in connection with the
Practice, and there has been no production, use, presence, treatment, storage,
transportation, disposal, release or threatened release by Seller of any
petroleum, petroleum products or any substance classified as "hazardous" under
an applicable federal, state or local law or regulation, other than those
materials used in the ordinary course of the operation of the Practice, or which
to Seller's knowledge is likely to give rise to any common law or legal
liability based on or related to the manufacture, processing, distribution, use,
treatment, storage, disposal, transport or handling, or the emission, discharge,
release or threatened release into the environment, of any pollutant,
contaminant, chemical, or industrial, toxic or hazardous substance or waste as a
result of Seller's operation of the Practice prior to the Closing Date.

                                      -12-
<PAGE>   13
                       (A) Seller has obtained all permits, licenses and other
authorizations which are required with respect to the operation of the Practice
prior to the Closing Date (the "Environmental Permits") under applicable
federal, state, local and foreign laws relating to pollution or protection of
the environment, including laws relating to emissions, discharges, releases or
threatened releases of pollutants, contaminants, chemicals, or industrial, toxic
or hazardous substances or wastes into the environment (including, without
limitation, ambient air, surface water, ground water, land surface or subsurface
strata) or otherwise relating to the manufacture, processing, distribution, use,
treatment, storage, disposal, transport or handling of pollutants, contaminants,
chemicals, or industrial, toxic or hazardous substances or wastes (the
"Environmental Laws").

                       (B) Seller is in compliance with all terms and conditions
of the Environmental Permits and is also in compliance with all other
limitations, restrictions, conditions, standards, prohibitions, requirements,
obligations, schedules and timetables contained in the Environmental Laws or
contained in any regulation, code, plan, order, decree, judgment, injunction,
notice or demand letter issued, entered, promulgated or approved thereunder
except for such violations that would not have a material and adverse effect on
the Practice or the Nonmedical Assets.

                       (C) There is no civil, criminal, or administrative
action, suit, demand, claim, hearing, notice of violation, investigation,
proceeding, notice or demand letter pending or, to the knowledge of Seller,
threatened against Seller or the Practice relating in any way to the
Environmental Laws or any regulation, code, plan, order, decree, judgment,
injunction, notice or demand letter issued, entered, promulgated or approved
thereunder.

                  (24) DISCLOSURE. No representation or warranty by Seller in
this Agreement contains, or as of the Closing will contain, any untrue statement
of a material fact, or omits, or as of the Closing will omit, to state a
material fact necessary to make the statements not misleading in light of the
circumstances under which they were made; provided, however, that if any party
to this Agreement becomes aware prior to the Closing Date (by investigation or
otherwise) of any such misstatements or omissions, that party promptly will
notify the other parties of such discovery as soon as practicable.

                  (25) INSURANCE. Exhibit 3.1(a)(25) hereto sets forth the
insurance covering the Nonmedical Assets and the Practice which have been
maintained by the Seller over the three year period preceding the date hereof.
At or prior to the Closing, the Seller shall provide to the Buyer certificates
of insurance providing evidence of the policies which are currently in force.

                  (26) FRINGE BENEFIT PLANS. Except as described in Exhibit
3.1(a)(26), Seller has no bonus, deferred compensation, pension, profit-sharing,
retirement, stock purchase, stock option or any other fringe benefit plan,
arrangement or practices, whether formal or

                                      -13-
<PAGE>   14
informal under which any Employee is eligible for benefits, and Seller has not
entered into any commitment to create any additional such plan or arrangement.

                  (27) PENSION BENEFIT PLANS.

                       (A) Except as set forth in Exhibit 3.1(a)(26) to this
Agreement, Seller is not a party to, does not participate in and is not
obligated to contribute to any "employee welfare benefit plan" as such term is
defined in Section 3(l) of ERISA, and Seller is not a party to, does not
participate in and is not obligated to contribute to any employee pension
benefit plan, as such term is defined in Section 3(2) of ERISA, including any
pension, profit-sharing, retirement, savings, bonus, thrift or stock bonus plan.
Except as set forth in said Exhibit, Seller is not a party to, a participant in
or obligated to contribute to any other deferred compensation, incentive,
vacation, severance pay, group insurance, stock option or other stock-related
employee benefit, or other plan (whether or not written) or arrangement or
understanding of any kind whatsoever providing employee benefits for any or all
of the current or former employees or agents of Seller.

                       (B) Except as set forth in "Exhibit 3.1(a)(26)" to this
Agreement, there are no "employee pension benefit plans", as defined in Section
3(2) of ERISA, (i) in respect of which Seller is an "employer" or a "substantial
employer," as defined in Sections 3(5) and 4001(a)(2), respectively, of ERISA,
(ii) with respect to which Seller is a "party in interest" within the meaning of
Section 3(14) of ERISA, or (iii) with respect to which Seller is assuming any
liability or will be liable to make contributions to or for the payment of
benefits. Seller is not a party to, and none of its operations is or has ever
been covered by, (i) any "multi-employer plan" as such term is defined in
Section 3(37) or Section 4001(a)(3) of ERISA or (ii) any other pension or
retirement payment arrangement, whether or not written, involving a past or
unfunded future cost to Seller, whether or not such plan or arrangement is
covered by ERISA.

                  (28) INTANGIBLE PROPERTY. Seller owns and as of the Closing
will own, the entire right, title and interest in and to all of the trademarks,
trademark registrations and applications, service marks, service names, and
commercial names set forth in "Exhibit 1.1(f)" to this Agreement, (the "Seller
Intangible Property"). To the knowledge of Seller: (i) none of the Seller
Intangible Property is being infringed by others; and (ii) the conduct of the
Practice does not infringe any patent, copyright, trademark, trade secret, trade
name or commercial name, registered or unregistered, or other intellectual
property rights of third parties, including present or former employees of the
Practice or former employers of such persons, and no claims are pending or have
been made to such effect.

                  (29) ADVERSE CHANGES. Since the date of the most recent
financial statement referred to in Section 3.1(a)(7) above, there has been no
material adverse change in the Assets or the Practice.

         3.2. BUYER'S REPRESENTATIONS AND WARRANTIES. Buyer hereby represents
and


                                      -14-
<PAGE>   15
warrants to Seller that:

                  (a) ORGANIZATION. Buyer is a corporation duly organized,
validly existing and in good standing under the laws of the State of Delaware.

                  (b) CORPORATE AUTHORITY. Buyer has all necessary corporate
power and authority to own or lease its properties and to carry on its business
as now being conducted. Buyer is duly qualified to do business and in good
standing in each state or jurisdiction wherein the nature of the business
conducted or the character of the property owned or leased makes such
qualification necessary, except in those jurisdictions where the failure to
qualify would not have a material and adverse affect on the business of Buyer.

                  (c) AUTHORIZATION. Buyer has full corporate power and
authority to enter into this Agreement and each of the other Transaction
Documents to which it is a party and to carry out the transactions contemplated
hereby and thereby. The Board of Directors of Buyer has taken all action
required by law, Buyer's Certificate of Incorporation and Bylaws, or otherwise,
to authorize the execution and delivery of this Agreement and such other
Transaction Documents and the consummation of the transactions contemplated
hereby and thereby, and this Agreement and such other Transaction Documents
constitute the valid and binding obligation of Buyer, enforceable in accordance
with their respective terms, except as enforceability may be limited by (i)
applicable bankruptcy, insolvency, moratorium, reorganization and other similar
laws affecting creditors' rights generally and (ii) general principles of
equity, regardless of whether asserted in a proceeding in equity or at law.

                   (d) LITIGATION. There are no actions, suits, proceedings or
investigations, at law or in equity, pending before any court, arbitrator or
governmental board or body, or pending or, to the knowledge of Buyer,
threatened, against or affecting Buyer which may adversely affect the ability of
Buyer to perform its obligations under the Transaction Documents.

                  (e) GENERAL CONSENTS AND FILINGS. All consents,
authorizations, registrations, qualifications, or filings with any federal or
state governmental authority on the part of Buyer, known by Buyer to be required
in connection with the consummation of the transactions contemplated herein,
shall have been obtained prior to and be effective as of the Closing Date.

                  (f) WARRANTIES ON CLOSING DATE. No representation or warranty
by Buyer in this Agreement contains, or as of the Closing will contain, any
untrue statement of a material fact, or omits, or as of the Closing will omit,
to state a material fact necessary to make the statements not misleading in
light of the circumstances under which they were made; provided,

                                      -15-
<PAGE>   16
however, that if any party to this Agreement becomes aware prior to the Closing
Date (by investigation or otherwise) of any such misstatements or omissions,
that party promptly will notify the other parties of such discovery as soon as
practicable.

                  (g) EFFECT OF THIS AGREEMENT. Neither the execution and
delivery of this Agreement nor the consummation of the transactions contemplated
hereby nor compliance by Buyer with any of the provisions hereof will violate,
breach or, with the giving of notice or passage of time, constitute an event of
default (or give rise to any right of termination, cancellation or acceleration)
under any of the terms, conditions or provisions of any agreement or other
instrument or obligation, except for the requirement of consent or waiver to
such transactions by the other party to the agreement or instrument, and except
for such violations, breaches or defaults (or rights of termination,
cancellation or acceleration) which taken as a whole are not material to the
financial condition of Buyer.

         3.3. BROKER OR AGENT. Each party shall pay any fee due to any broker,
finder, agent or other person or entity contracted by that party in regard to
this transaction and shall indemnify and hold harmless the other party
therefrom.

         3.4. OBLIGATIONS AFTER CLOSING. From time to time after the Closing,
the parties shall, at the reasonable request of the other, and without further
consideration, execute and deliver or cause to be executed and delivered such
instruments, and take such other actions, as may reasonably be requested in
order fully to transfer and perfect title to the Nonmedical Assets and to
effectuate the transactions contemplated by this Agreement.

                                   ARTICLE IV
                                    COVENANTS

         4.1. COVENANTS OF SELLER. Seller hereby covenants that:

              (a) ADVICE OF CHANGES. Seller will promptly notify Buyer in
writing of:

                  (1) any event occurring subsequent to the date of this
Agreement that would render any representation or warranty of Seller contained
in this Agreement, if made on or as of the date of that event or the Closing
Date, untrue or inaccurate in any material respect and

                  (2) any known or reasonably anticipated material adverse
change in the Practice occurring after the date of this Agreement.

              (b) ABSENCE OF CHANGES. Except as set forth in "Exhibit 4.1(b)" to
this Agreement there has not been, since July 1, 1996, and as of the Closing
Date, there will not be:

                                      -16-
<PAGE>   17
                  (1) any change in the Assets, financial condition, accounting
methods or operations of the Seller or the Practice, except changes in the
ordinary course of business which have not been, either in any single case or in
the aggregate, materially adverse to the Seller or the Practice;

                  (2) any damage, destruction or loss, whether or not covered by
insurance, materially and adversely affecting the Nonmedical Assets or the
Seller;

                  (3) any waiver by the Seller of valuable rights or of debts
owed to it (including, but not limited to, accounts receivable) which, taken as
a whole, are material to the business or financial condition of Seller;

                  (4) any loans made by Seller to its employees or agents other
than advances of expenses made in the ordinary course of business or consistent
with prudent past practices as to kind and amount;

                  (5) other than in accordance with obligations, agreements or
commitments in effect on or before the Closing Date and disclosed to Buyer, any
increase in the compensation payable by Seller to any employee or agent or any
declaration, payment, commitment or obligation of any kind for the payment by
Seller of any bonus, additional compensation or salary, or retirement,
termination or severance benefits to employees or agent; provided that Seller
may grant annual raises in the ordinary course consistent with past practices;
or

                  (6) any other event or condition of any character which
materially and adversely has affected or can be reasonably anticipated to
materially and adversely affect the condition, affairs or operations of the
Seller or the Practice.

              (c) IMPLEMENTATION OF REPRESENTATIONS AND WARRANTIES. Seller shall
use its best efforts to render accurate as of the Closing its representations
and warranties contained in this Agreement, and shall refrain from taking any
action which would render inaccurate as of the Closing any of such
representations and warranties.

              (d) COMMUNICATIONS AND PUBLIC ANNOUNCEMENTS. Between the date
hereof and the Closing, Seller shall not furnish any communication to, or
otherwise communicate with, the public with respect to the transactions
contemplated by this Agreement, except to the extent necessary to obtain
consents and approvals required in order to transfer the Nonmedical Assets,
without the prior approval of Buyer as to the content thereof, which approval
shall not be unreasonably withheld or delayed by Buyer and which shall not be
withheld or delayed where such communication is required by applicable law or is
required as a condition of any regulatory approval sought by Seller. No such
communication or public announcement shall disclose the

                                      -17-
<PAGE>   18
amount of the Purchase Price unless, in the opinion of Seller's counsel, such
disclosure is required by applicable law. The foregoing provisions do not limit
the ability of the Seller to discuss with, or disclose to, its employees this
transaction.

              (e) ASSISTANCE IN TRANSFERRING NONMEDICAL ASSETS AND PRACTICE.
Seller shall use reasonable efforts to assist Buyer in planning for and
accomplishing the orderly transition and transfer of the Nonmedical Assets to
Buyer as provided herein and shall take all steps as may be reasonably requested
by Buyer in furtherance thereof, including the continuation of services to
patients and customers of Seller. Seller will also cooperate in the preparation
of any required financial statements, the cost thereof to be borne by Buyer.

              (f) ACCESS FOR DUE DILIGENCE. Between the date hereof and the
Closing or the termination of this Agreement, whichever shall first occur:

                  (1) Seller shall afford representatives of Buyer and its
agents reasonable access during normal business hours to the offices, personnel
and representatives (including independent accountants) of Seller and to such of
the financial, contractual and other records of Seller as shall be reasonably
necessary for Buyer's investigation of the Seller Practice, which investigations
will be conducted in a manner which will not unreasonably interfere with the
normal conduct of the Practice;

                  (2) Buyer and its representatives shall have the right to
contact third parties who have material contractual relationships with Seller in
order to investigate the status of such relationships, however, Buyer shall not
contact any third parties without the prior approval of the Seller and in a
manner reasonably satisfactory to Seller, which approval shall not be
unreasonably withheld;

                  (3) Seller shall promptly provide to representatives of Buyer
and its agents such financial and operating data of Seller and such other
information with respect to the Assets and the Practice as such persons shall,
from time to time, reasonably request.

              (g) OTHER TRANSACTIONS. So long as this Agreement has not been
terminated in accordance with its terms, Seller will not, directly or indirectly
through any officer, director, employee, agent or otherwise, take any action to
solicit, initiate, seek, encourage or support any inquiry, proposal or offer
from, furnish any information to, or participate in any negotiations with, any
corporation, partnership, person or other entity or group (other than Buyer and
its officers, employees and agents) regarding any acquisition of any capital
stock or other securities of Seller, any merger or consolidation with or
involving Seller or any acquisition of any material portion of the assets of
Seller.

                                      -18-
<PAGE>   19
              (h) THIRD PARTY CONSENTS. Seller shall use its best efforts to
obtain the written consent of each person, organization or governmental
authority whose consent or approval shall be required or advisable in order to
permit it to transfer the Nonmedical Assets hereunder; however, should Buyer
elect to proceed with the Closing notwithstanding Seller's failure to obtain any
of the written consents required or advisable hereunder, then the Seller shall
have no further liability or obligation with respect thereto.

              (i) RISK OF LOSS. All risk of loss, damage or destruction to the
Nonmedical Assets shall be borne by Seller until the Closing Date as provided
herein.

         4.2. COVENANTS OF BUYER. Buyer hereby covenants that:

              (a) ADVICE OF CHANGES. Buyer will promptly notify Seller in
writing of (i) any event occurring subsequent to the date of this Agreement that
would render any representation or warranty of Buyer contained in this
Agreement, if made on or as of the date of that event or the Closing Date,
untrue or inaccurate in any material respect, and (ii) any material adverse
change in the business or prospects of the business of the Buyer.

              (b) IMPLEMENTATION OF REPRESENTATIONS AND WARRANTIES. Buyer shall
use its best efforts to render accurate as of the Closing Date its
representations and warranties contained in this Agreement, and shall refrain
from taking any action which would render inaccurate as of the Closing Date any
of such representations or warranties.

              (c) COMMUNICATIONS AND PUBLIC ANNOUNCEMENTS. Between the date
hereof and the Closing Date, Buyer shall not furnish any communication to, or
otherwise communicate with, the public with respect to the transactions
contemplated by this Agreement, except to the extent necessary to obtain
consents and approvals required in order to transfer the Assets, without the
prior approval of Seller as to the content thereof, which approval shall not be
unreasonably withheld or delayed by Seller and which shall not be withheld or
delayed where such communication is required by applicable law or is required as
a condition of any regulatory approval sought by Buyer. No such communication or
public announcement shall disclose the amount of the Purchase Price unless, in
the opinion of Buyer's counsel, such disclosure is required by applicable law.

              (d) THIRD PARTY CONSENTS. Buyer shall use reasonable efforts to
assist the Seller in obtaining the written consent and approvals of each person,
organization or governmental authority whose consent or approval shall be
required or advisable in order to permit it to transfer the Nonmedical Assets
hereunder.

              (e) COLLECTION OF ACCOUNTS RECEIVABLE. At Seller's option
following the Closing, or as soon thereafter as shall be practicable, Seller
shall deliver to Buyer a list of its accounts receivable as of the Closing Date.
Buyer agrees to use its best efforts, during the six

                                      -19-
<PAGE>   20
months period following the Closing, to collect, on behalf of and for the
account of Seller, such accounts receivable as expeditiously as possible. Any
payments which Buyer receives which are made in the name of the Seller shall be
immediately delivered to the Seller. Any payments which are received in the name
of Buyer shall be transmitted to the Seller on a weekly basis. It is agreed that
all payments received from an account debtor shall be applied against the
receivables of such debtor in the same order as booked, except in the event the
account debtor otherwise specifies in writing. Nothing contained herein shall
obligate Buyer to institute litigation in an effort to collect the accounts
receivable, nor shall Seller be prevented from taking any action to collect the
accounts receivable. Seller shall pay to the Buyer a fee with respect to such
services, at a mutually agreed rate. Seller may terminate this arrangement at
any time upon 15 days prior notice.

         4.3. OTHER AGREEMENTS OF THE PARTIES.

              (a) NON-COMPETITION AGREEMENT. At the Closing, Seller, its
individual shareholders and Buyer, its corporate general partner, Raytel
Cardiovascular Labs, Inc., a Delaware corporation, and its parent corporation,
Raytel Medical Corporation, a Delaware corporation, shall enter into a Covenant
Not to Compete, in form and substance satisfactory to each party, pursuant to
which Seller and the individual shareholders shall agree not to compete with the
Buyer, in the manner and to the extent provided therein.

              (b) BOOKS AND RECORDS. Excluded from the Nonmedical Assets are the
patient records described on Exhibit 1.4(b) hereto. Seller shall preserve such
patient records and files for a period of five years from the date the patient
ceases to be an active patient, and in the event the Seller at any time after
the end of such period of time determines to destroy all or any portion of said
patient records and files, it shall first notify Buyer of such decision and
provide Buyer the opportunity to obtain possession thereof. Buyer shall at all
times have immediate and unrestricted access to such patient records and files,
upon reasonable notice and for any reasonable purpose of Buyer. Buyer will
maintain the confidentiality of all patient records and not use the same except
to respond to (i) third party claims, (ii) governmental or third party payor
inquiries, investigations or proceedings, or (iii) physician or patient
inquiries.

         4.4. TERMINATION.

              (a) This Agreement may be terminated, and the purchase and sale of
the Nonmedical Assets abandoned, at any time by the mutual written consent of
the parties expressed by action of their respective Boards of Directors.

              (b) This Agreement shall automatically terminate if the Closing
hereunder shall not have been consummated on or before August 31, 1996, unless
the parties shall have agreed in writing to extend such date.


                                      -20-
<PAGE>   21
              (c) Buyer shall also be able to terminate this Agreement in the
event that (i) it determines that, in the course of its due diligence review of
the books, records, contracts, documents and other materials requested from ,
Seller's Practice is not in substantial compliance with all federal, state and
local statutes, regulations and rules applicable to the Practice, including but
not limited to Title XVIII of the Social Security Act, codified at 42 U.S.C.A.
sections 1395-1395cc and Medicare regulations codified at 42 C.F.R. Parts
405-424, and 482-498, (ii) Seller's representations and warranties contained
herein are materially incorrect and cannot be corrected within a reasonable
period of time, or (iii) the Assets and Practice are materially not as
represented by Seller.

              (d) Seller shall also be able to terminate this Agreement in the
event that Buyer's representations and warranties contained herein are
materially incorrect and cannot be corrected within a reasonable period of time.

                                    ARTICLE V
                               CLOSING CONDITIONS

         5.1. CLOSING CONDITIONS.

              (a) SELLER'S CONDITIONS. Seller's obligations hereunder at Closing
are specifically conditioned on the following:

                  (1) ACCURACY OF REPRESENTATIONS AND WARRANTIES; ETC. All of
the representations and warranties made by Buyer in this Agreement shall be true
in all material respects as of the Closing with the same force and effect as
though such representations and warranties had been made as of the Closing,
except as affected by transactions contemplated by this Agreement; all of the
terms, covenants and conditions of this Agreement to be complied with and
performed by Buyer at or before the Closing shall have been duly complied with
and performed; and Seller shall receive a certification of the Buyer, dated the
Closing Date and executed by the Chairman or President of the Buyer, to each
such effect.

                  (2) APPROVAL OF SALE. All authorizations, consents and
approvals of all federal, state, and local governmental agencies and authorities
required to be obtained in order to permit the consummation of the transactions
contemplated by this Agreement, if any, shall have been obtained.

                  (3) CONSENTS OBTAINED. Seller shall have received consent or
approval of each person or organization whose consent or approval shall be
required in order to permit Seller to consummate the transactions contemplated
hereby or in order to avoid any breach or termination of any material contract,
agreement or lease included in the Assets.


                                      -21-
<PAGE>   22
                  (4) NO LITIGATION. There shall be no litigation pending which
has been brought for the purpose of enjoining the purchase and sale of the
Nonmedical Assets or any part thereof or any other transaction contemplated by
this Agreement or which would have the effect, if successful, of imposing a
material liability upon Seller, or any of their officers or directors, because
of such purchase and sale or any such transaction.

                  (5) NON-COMPETITION COVENANT. The non-competition agreement
referred to in paragraph 4.3(a) shall have been executed and delivered by the
parties thereto.

                  (6) PAYMENT. The payment of the Purchase Price, in accordance
with the provisions of paragraph 2.2 above, shall have been made to the Seller.

                  (7) ASSUMPTION AGREEMENT. An assumption agreement, in form and
substance satisfactory to Seller, pursuant to which the Buyer confirms its
assumption of liabilities and obligations as provided herein, shall have been
executed and delivered by the Buyer.

                  (8) PURCHASE PRICE. A schedule setting forth the cash amount
to be delivered at the Closing.

                  (9) DOCUMENTATION. All documentation to be delivered by Buyer
at closing shall be in a form reasonably acceptable to Seller as to form and
content.

              (b) BUYER'S CONDITIONS. The obligations of Buyer hereunder at
Closing shall be subject to satisfaction of the following conditions:

                  (1) ACCURACY OF REPRESENTATIONS AND WARRANTIES; ETC. All of
the representations and warranties made by Seller in this Agreement shall be
true in all material respects as of the Closing, with the same force and effect
as though such representations and warranties had been made as of the Closing,
except as affected by transactions contemplated by this Agreement; all of the
terms, covenants and conditions of this Agreement to be complied with and
performed by Seller or its affiliates, at or before the Closing shall have been
duly complied with and performed; and Buyer shall have received a certification
of the Seller, dated the Closing Date and executed by the President and Chief
Executive Officer of the Seller, to each such effect.

                  (2) APPROVAL OF SALE. All authorization, consents and
approvals of all federal, state, and local governmental agencies and authorities
required to be obtained in order to permit the consummation of the transactions
contemplated by this Agreement shall have been obtained, it being agreed that
Seller shall have no liability to the Buyer in the event that the Buyer chooses
to proceed with closing notwithstanding the failure to obtain any such
authorization, consent or approval.

                                      -22-
<PAGE>   23
                  (3) CONSENTS OBTAINED. The consent or approval of each person
or organization whose consent or approval shall be required in order to permit
Seller to consummate the transactions contemplated hereby or in order to avoid
any breach or termination of any contract, agreement or lease included in the
Nonmedical Assets shall have been obtained, it being agreed that the Seller
shall have no liability in the event the Buyer chooses to proceed with closing
notwithstanding the failure to obtain any such consent or approval.

                  (4) NO LITIGATION. There shall be no litigation pending which
has been brought for the purpose of enjoining the purchase and sale of the
Nonmedical Assets or any part thereof or any other transaction contemplated by
this Agreement or which would have the effect, if successful, of imposing a
material liability upon Buyer, or any of their officers or directors, because of
such purchase and sale or any such transaction.

                  (5) DOCUMENTATION. All documentation to be delivered by Seller
at Closing shall be in a form reasonably acceptable to Buyer as to form and
content.

                  (6) ASSIGNMENTS. All steps necessary to assure proper transfer
of all assignable permits and licenses relating to the Practice, including but
not limited to assignable environmental permits and business licenses, shall
have been taken.

                  (7) NO ADVERSE EVENT. No other event has occurred which,
either singly or in the aggregate, has or may have a material and adverse effect
on the Nonmedical Assets or the Practice.

                  (8) NON-COMPETITION AGREEMENT. The non-competition agreement
referred to in paragraph 4.3(a) shall have been executed and delivered by the
parties thereto.

                  (9) EMPLOYEE COVENANTS. Seller and its shareholders, both
jointly and severally, covenant that they will obtain from each of the present
physicians employed by Seller or serving as an independent contractor to Seller
a binding covenant not to compete substantially similar to the terms of the
agreement referred to in paragraph 4.3(a), and such covenant not to compete
shall have been executed and delivered by each such physician employee or
physician independent contractor prior to the closing of the transaction set
forth in this Agreement. In addition, Seller shall have assigned to the Buyer
its rights under any outstanding non-competition, confidentiality or similar
covenant or agreements which it may have received from its current employees.

                  (10) BILL OF SALE. A bill of sale, and such other instruments
of assignment as may be appropriate, in form and substance satisfactory to the
Buyer, shall have been delivered to the Buyer, evidencing the transfer of the
Nonmedical Assets to the Buyer.

                                      -23-
<PAGE>   24
                  (11) ASSUMED BANK LOANS. A schedule disclosing the exact
amount of indebtedness being assumed by Buyer.

                                   ARTICLE VI
                                     CLOSING

         6.1. CLOSING. The consummation of the purchase and sale of the
Nonmedical Assets hereunder (the "Closing") shall take place on such date as the
parties shall mutually agree in writing (the "Closing Date"), but in no event
later than August 31, 1996. The Closing shall take place at the offices of
Orgain, Bell & Tucker, LLP, 470 Orleans Street, Beaumont, TX 77702

                                   ARTICLE VII
                   SURVIVAL OF REPRESENTATIONS AND WARRANTIES
                               AND INDEMNIFICATION

         7.1. SURVIVAL. The representations and warranties of the parties
contained in this Agreement or in any certificate or instrument delivered
pursuant hereto shall survive the Closing Date for the period in which a claim
with respect thereto may be made, in accordance with the provisions of paragraph
7.3 hereto.

         7.2. INDEMNITY.

              (a) BY SELLER. Upon and following the Closing, and subject to the
limitations set forth in paragraph 7.3 hereto, Seller shall indemnify, defend,
protect and hold Buyer harmless from, and against, any and all claims, demands
and liabilities (including but not limited to claims or liabilities relating to
environmental damage or claims by Medicare, Medicaid, Health Care Finance
Administration (including but not limited to Title XVIII of the Social Security
Act, codified at 42 U.S.C.A. sections 1395-1395cc and Medicare regulations
codified at 42 C.F.R. Parts 405-424, and 482-498), any insurance company,
managed care organization or other health care claims paying or claims
processing intermediary), including reasonable attorney's fees, arising from or
on account of:

                  (1) any breach by Seller of this Agreement;

                  (2) any liability of Seller not assumed by Buyer herein or in
any instrument delivered hereunder;

                  (3) any inaccuracy to, misrepresentation in or breach of any
of the warranties, representations, covenants or agreements made by Seller
herein; and

                                      -24-
<PAGE>   25
                  (4) Seller's use of the Nonmedical Assets, operation of the
Practice and use and occupation of any premises in which the Practice is located
prior to the Closing, including, without limitation, any and all amounts payable
to local, state or federal tax authorities, claims made by creditors of Seller
and liability claims made with respect to the conduct of the Practice by Seller
prior to the Closing, except for liabilities expressly assumed herein by Buyer.

              (b) BY BUYER. Buyer shall indemnify, defend, protect, and hold
Seller harmless from and against any and all claims, demands and liabilities,
including reasonable attorneys' fees, arising from or on account of (1) Buyer's
use of the Nonmedical Assets or Buyer's operation of any business using the
Nonmedical Assets or the use and occupation of the premises in which the
Practice is located on or after the Closing, including without limitation any
and all amounts payable to local, state or federal tax authorities, claims made
by creditors of Buyer and liability claims made with respect to the conduct of
the business by Buyer following the Closing; (2) any breach by Buyer of this
Agreement; (3) any liability of Seller assumed by Buyer herein or in any
instrument delivered hereunder; and (4) any inaccuracy to, misrepresentation in
or breach of any of the warranties, representations, covenants or agreements
made by Buyer herein.

         7.3. LIMITS TO INDEMNITY. Notwithstanding the provisions of this
Article VII, or any other provisions set forth in this Agreement or in any
document delivered hereunder:

              (a) Any claim for indemnification made pursuant to paragraph
7.2(a) above must be made in writing to Seller during the six month period
following the Closing Date, unless and to the extent that such claim relates to
a claim or liability relating to environmental damage or claims by Medicare,
Medicaid or the Health Care Finance Administration or any insurance company,
managed care organization or other health care claims paying or claims
processing intermediary (collectively, "Environmental or Medicare Claims"),
which Environmental or Medicare Claims must be made, if at all, in writing
within three years following the Closing Date. Buyer shall have no right to make
a claim for indemnity after the end of the applicable period.

              (b) Buyer shall be entitled to indemnification from Seller (i)
only in the event that all such claims exceed $500, and then only with respect
to the excess above $500 and (ii) only in an amount, in the aggregate not
exceeding $5,000,000, unless and to the extent that a claim is an Environmental
or Medicare Claim, in which case such parties' aggregate liability for all such
Environmental or Medicare Claims shall be unlimited.

         7.4 RESPONSE TO MEDICARE CLAIMS. In the event that Buyer receives a
Medicare Claim (or inquiry which could result in a Medicare Claim), as to which
Buyer has the right to indemnity, Buyer will immediately notify Seller thereof
and Seller will have sole right to respond to and defend such Claim or inquiry.

                                  ARTICLE VIII
                             COVENANT NOT TO COMPETE

                                      -25-
<PAGE>   26
         8.1 COVENANT NOT TO COMPETE.

              (a) Seller and the individual Shareholders, either individually or
in any combination among themselves or in combination with others, covenant and
agree that they will not, nor will they permit any affiliate, during the five
(5) year period following the Closing, to engage, directly or indirectly, as
owner, partner, stockholder, joint venturer, consultant, or in any other
capacity whatsoever become financially interested, in any medical practice
providing the same or similar services as now being performed by Seller or the
individual Shareholders, including but not limited to invasive or noninvasive
cardiac services (the "Restricted Services") anywhere within the six (6)
counties consisting of Jefferson, Orange, Hardin, Jasper, Chambers and Liberty
Counties, all within the State of Texas.

              (b) The provisions of subparagraph (a) above shall not pertain to
or restrict Seller or the Shareholders from:

                  (1) owning up to 5% of the capital stock of any corporation
whose stock is publicly traded;

                  (2) performing the duties and responsibilities of a full-time
member of the teaching faculty at an accredited medical school; or

                  (3) owning shares in New PA for the purposes contemplated in
the Transaction Documents or Seller following the Closing for the sole and
exclusive purpose of collecting the accounts receivable, defending any existing
medical malpractice claims or potential claims, paying liabilities, and
otherwise winding up the affairs of Seller, which shall specifically exclude the
performing of additional medical services, either for compensation or without
compensation, and

              (c) Seller and the Shareholders agree that the time period
provided for, and the geographical area encompassed by, the covenants contained
in this Section 8.1 are necessary and reasonable in order to protect Buyer in
the conduct of the business and the utilization of the Nonmedical Assets
acquired by virtue of this Agreement.

              (d) If any court having jurisdiction at any time hereafter shall
hold any provision or clause of this Section 8.1 to be unreasonable as to its
scope, territory or term, and if such court in its judgment or decree shall
declare or determine a lesser scope, territory or term which such court deems to
be reasonable, then such scope, territory or term, as the case may be, shall be
deemed automatically to have been reduced or modified to conform to that
declared or determined by such court to be reasonable.

              (e) It is expressly agreed that monetary damages would be
inadequate to

                                      -26-
<PAGE>   27
compensate Buyer for any breach by Seller or the individual shareholders of the
covenants set forth in this Section 8.1 and, accordingly, that in the event of
any breach or threatened breach by Seller or the individual shareholder of any
such covenant, Buyer will be entitled to seek and obtain preliminary and
permanent injunctive relief in any court of competent jurisdiction, in addition
to any other remedies at law or in equity to which Buyer may be entitled.

                                   ARTICLE IX
                               GENERAL PROVISIONS

         9.1. MISCELLANEOUS.

              (a) AMENDMENTS. No amendments or additions to this Agreement shall
be binding unless in writing and signed by both parties.

              (b) WAIVER. Buyer, on the one hand, and Seller, on the other hand,
may, by written notice to the other:

                  (1) waive any of the conditions to its obligations hereunder
or extend the time for the performance of any obligation or action of the other;

                  (2) waive any inaccuracies in the representations of the other
contained in this Agreement or in any documents delivered pursuant to this
Agreement;

                  (3) waive compliance with any of the covenants of the other
contained in this Agreement; or

                  (4) waive or modify performance of any of the obligations of
the other.

         No action taken pursuant to this Agreement, including without
limitation any investigation by or on behalf of either party, shall be deemed to
constitute a waiver by the party taking such action of compliance with any
representations, warranty, condition or agreement contained herein. Waiver of
the breach of any one or more provisions of this Agreement shall not be deemed
or construed to be a waiver of other breaches or subsequent breaches of the same
provision.

              (c) APPLICABLE LAW. This Agreement shall be governed in all
respects, whether as to validity, construction, capacity, performance or
otherwise, by the laws of the State of Texas.

                                      -27-
<PAGE>   28
              (d) BINDING EFFECT. This Agreement shall be binding upon and shall
inure to the benefit of the parties hereto and their respective successors,
assigns, heirs and personal representatives. No party may assign or transfer any
rights or obligations under this Agreement without the prior written consent of
the other party, which consent shall not be unreasonably withheld or delayed;
provided however, that

                  (1) Buyer may assign its rights under this Agreement to any
majority-owned subsidiary of Buyer, provided that Buyer or its parent
corporation guarantees the obligations of such subsidiary hereunder; and

                  (2) any party may assign its rights under this Agreement to
any successor through any merger or consolidation, or purchaser of all or
substantially all of such party's stock or assets.

              (e) EXPENSES. The parties shall each be responsible for
accounting, legal, and other professional fees, or other costs or expenses which
are related to the transactions contemplated herein, whether or not such
transactions are consummated.

              (f) NOTICES. All notices and other communications provided for in
this Agreement shall be given or made by telex, telecopy, telegraph, cable,
certified or registered mail (return receipt requested), or delivered personally
or by a nationally recognized overnight courier service to the address set forth
below (or such other address as may be designated by any method permitted by
this Paragraph 9). All such communications shall be deemed to have been duly
given when transmitted by telex or telecopier (if a copy thereof is also mailed
to the recipient, certified or registered mail, postage paid), or personally
delivered or delivered by cable, telegraph, or nationally overnight courier
service, or five (5) calendar days after mailing, postage prepaid, to the
address set forth below.

              IF TO SELLER:     Southeast Texas Cardiology Associates II, P.A.
                                2693 North  Street
                                Beaumont, TX  77701
                                Attn:    Rodolfo Sotolongo, M. D.
                                         President

              WITH COPY TO:     Orgain, Bell & Tucker, L.L.P.
                                470 Orleans Street
                                Beaumont, TX  77701
                                Attn:  John Creighton, Esq.
                                         Lance J. Fox, Esq.

                                      -28-
<PAGE>   29
              IF TO BUYER:     Raytel Medical Corporation
                               2755 Campus Drive, Suite 200
                               San Mateo, California 94403
                               Attn:    Richard F. Bader
                                        Chairman and Chief Executive Officer

              WITH COPY TO:     Mayor, Day, Caldwell & Keeton, L.L.P.
                                700 Louisiana Street, Suite 1900
                                Houston, TX  77002-2778
                                Attn:    Diana M. Hudson, Esq.

                  (g) PARAGRAPH HEADINGS. The paragraph headings used in this
Agreement are included solely for the convenience of the parties and shall not
affect or be used in connection with the interpretation of this Agreement.

                  (h) SEVERABILITY. In the event any provision or portion of a
provision of this Agreement is held to be invalid, void or unenforceable, the
rest of the Agreement shall, nonetheless, remain in full force and effect and
shall in no way be affected, impaired, or invalidated.

                  (i) ENTIRE AGREEMENT. This instrument constitutes the entire
agreement between the parties and supersedes all prior understandings, previous
negotiations, and any memoranda or understanding with respect to the subject
matter hereof.

                  (j) NO STRICT CONSTRUCTION. The language used in this
Agreement shall be deemed to be the language chosen by the parties hereto to
express their mutual intent, and no rule of strict construction will be applied
against any person.

                  (k) COUNTERPARTS. This Agreement may be executed in any number
of identical counterparts, each of which shall be deemed to be an original, and
all of which together shall be deemed to be one and the same instrument when
each party has signed one such counterpart.

                  (l) TIME OF THE ESSENCE. Time is of the essence in this
Agreement.

                  (m) EXHIBITS. All exhibits attached to this Agreement are
incorporated herein by reference.

                                      -29-
<PAGE>   30
         IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first above written.

<TABLE>
<CAPTION>
SELLER:                                             BUYER:

<S>                                                 <C>
SOUTHEAST TEXAS CARDIOLOGY                          RAYTEL MANAGEMENT SERVICES ASSOCIATES,
OF TEXAS, L. P., a Texas                            P.A., a Texas professional
limited corporation                                 partnership

By: /s/ Rodolfo Sotolongo                           By: /s/ Richard F. Bader
   ----------------------------                        -------------------------------
     Rodolfo Sotolongo, M. D.                           Richard F. Bader
Its: President and Chief Executive Officer              RAYTEL TEXAS PHYSICIAN
                                                        SERVICES, INC., a Delaware
                                                        corporation (the"General Partner")
SHAREHOLDERS:                                       Its:     Chairman and Chief Executive Officer

                                                                       PARENT:
/s/ Rodolfo Sotolongo
- ---------------------------
Rodolfo Sotolongo, M. D.                             RAYTEL MEDICAL CORPORATION,

                                                              a Delaware corporation
/s/ Wayne Margolis
- ---------------------------
Wayne Margolis, M. D.                                By: /s/ Richard F. Bader
                                                        ------------------------------
                                                         Richard F. Bader
                                                     Its:  Chairman and Chief Executive Officer
/s/ Michael Smith
- --------------------------
Michael Smith, M. D.
</TABLE>


                                       -30-

<PAGE>   1
                                                                     EXHIBIT 2.3

                          MANAGEMENT SERVICES AGREEMENT

                                 BY AND BETWEEN

                       CARDIOLOGY MANAGEMENT PARTNERSHIP,
                           A TEXAS GENERAL PARTNERSHIP

                                       AND

                 SOUTHEAST TEXAS CARDIOLOGY ASSOCIATES II, P.A.
                        A TEXAS PROFESSIONAL ASSOCIATION
<PAGE>   2
                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                               Page
<S>                                                                             <C>
ARTICLE I. DEFINITIONS...........................................................   2

   Section 1.1 Adjusted Gross Revenue............................................   2
   Section 1.2 Adjustments.......................................................   2
   Section 1.3 Ancillary Revenue.................................................   2
   Section 1.4 Base Management Fee...............................................   2
   Section 1.5 Budget............................................................   2
   Section 1.6 Business Manager..................................................   2
   Section 1.7 Business Manager Consent..........................................   2
   Section 1.8 Business Manager Expense..........................................   3
   Section 1.9 Confidential Information..........................................   3
   Section 1.14 GAAP.............................................................   3
   Section 1.15 Management Fee...................................................   3
   Section 1.16 Management Services..............................................   3
   Section 1.13 Management Services Agreement....................................   3
   Section 1.14 Master Transaction Agreement.....................................   4
   Section 1.15 Medical Group....................................................   4
   Section 1.16 Medical Group Account............................................   4
   Section 1.17 Medical Group Consent............................................   4
   Section 1.18 Medical Group Expense............................................   4
   Section 1.19 Medical Services.................................................   4
   Section 1.20   Net Collections................................................   4
   Section 1.21 Office...........................................................   4
   Section 1.22 Office Expense...................................................   5
   Section 1.23   Original Physicians' Salaries..................................   6
   Section 1.24 Performance Fee..................................................   6
   Section 1.25 Physician........................................................   6
   Section 1.26 Policy Board.....................................................   6
   Section 1.27 Practice Territory...............................................   6
   Section 1.28 Professional Services Revenues...................................   7
   Section 1.29 Representatives..................................................   7
   Section 1.30 State............................................................   7
   Section 1.31 Term.............................................................   7

ARTICLE II. APPOINTMENT AND AUTHORITY OF BUSINESS MANAGER.......................    7

   Section 2.1 Appointment......................................................    7
   Section 2.2 Authority........................................................    7
   Section 2.3 Patient Referrals................................................    7
   Section 2.4 Practice of Medicine.............................................    8

ARTICLE III. RESPONSIBILITIES OF THE POLICY BOARD...............................    8

   Section 3.1 Formation and Operation of the Policy Board......................    8
   Section 3.2 Duties and Responsibilities of the Policy Board..................    8
   Section 3.3 Medical Decisions................................................    9
</TABLE>


                                      -i-
<PAGE>   3
<TABLE>
<S>                                                                                <C>
ARTICLE IV. COVENANTS AND RESPONSIBILITIES OF BUSINESS MANAGER..................   10

   Section 4.1 Office and Equipment.............................................   10
   Section 4.2 Medical Supplies.................................................   11
   Section 4.3 Support Services.................................................   11
   Section 4.4 Quality Assurance Risk Management and Utilization Review.........   11
   Section 4.5 Licenses and Permits.............................................   11
   Section 4.6 Personnel........................................................   11
   Section 4.7 Contract Negotiations............................................   12
   Section 4.8 Billing and Collection...........................................   12
   Section 4.9 Medical Group Account............................................   13
   Section 4.10 Fiscal Matters..................................................   14
   Section 4.11 Reports and Records.............................................   16
   Section 4.12 Recruitment of Medical Group Physicians.........................   16
   Section 4.13 Acquisitions of or Mergers with other Medical Groups............   16
   Section 4.14 Business Manager's Insurance....................................   16
   Section 4.15 No Warranty.....................................................   17

ARTICLE V. COVENANTS AND RESPONSIBILITIES OF MEDICAL GROUP......................   17

   Section 5.1 Organization and Operation.......................................   17
   Section 5.2 Medical Group Personnel..........................................   17
   Section 5.3 Professional Standards...........................................   20
   Section 5.4 Medical Services.................................................   20
   Section 5.5 Peer Review/Quality Assurance....................................   21
   Section 5.6 Medical Group's Insurance........................................   21
   Section 5.7 Confidential and Proprietary Information.........................   21
   Section 5.8 Noncompetition...................................................   22
   Section 5.9 Name, Trademark..................................................   24

ARTICLE VI. FINANCIAL ARRANGEMENT...............................................   24

   Section 6.1 Definitions......................................................   24
   Section 6.2 Compensation.....................................................   24
   Section 6.3 Adjustments......................................................   25
   Section 6.4 Reasonable Value.................................................   25
   Section 6.5 Payment of Management Fee........................................   26
   Section 6.6 Disputes Regarding Fees..........................................   26

ARTICLE VII. TERM AND TERMINATION...............................................   26

   Section 7.1 Initial and Renewal Term.........................................   26
   Section 7.2 Termination......................................................   27
   Section 7.3 Legislative, Regulatory or Administrative Change.................   28
   Section 7.4 Effects of Termination...........................................   29
   Section 7.5 Repurchase Obligation............................................   29
   Section 7.6 Repurchase Option................................................   30
   Section 7.7 Closing of Repurchase............................................   31
</TABLE>


                                      -ii-
<PAGE>   4
<TABLE>
<S>                                                                                <C>
ARTICLE VIII. MISCELLANEOUS.....................................................   31

   Section 8.1 Administrative Services Only.....................................   31
   Section 8.2 Status of Contractor.............................................   31
   Section 8.3 Notices..........................................................   31
   Section 8.4 Governing Law....................................................   32
   Section 8.5 Assignment.......................................................   32
   Section 8.6 Arbitration......................................................   33
   Section 8.7 Waiver of Breach.................................................   33
   Section 8.8 Enforcement......................................................   33
   Section 8.9 Gender and Number................................................   33
   Section 8.10 Additional Assurances...........................................   33
   Section 8.11 Consents, Approvals, and Exercise of Discretion.................   33
   Section 8.12 Force Majeure...................................................   33
   Section 8.13 Severability....................................................   34
   Section 8.14 Divisions and Headings..........................................   34
   Section 8.15 Amendments and Management Services Agreement Execution..........   34
   Section 8.16 Entire Management Services Agreement............................   34
</TABLE>


- -iii-
<PAGE>   5
                          MANAGEMENT SERVICES AGREEMENT

THIS MANAGEMENT SERVICES AGREEMENT is made and entered into effective as of
September 18, 1996 (the "Effective Date"), by and between Cardiology Management
Partnership, a Texas general partnership (as defined more precisely in Article
I, "Business Manager"), and Southeast Texas Cardiology Associates II, P.A., a
Texas professional association ("Medical Group").

                                    RECITALS

This Management Services Agreement is made with reference to the following
premises:

         A. Medical Group is a validly existing Texas professional association,
formed for and engaged in the conduct of a cardiology medical practice and the
provision of cardiology medical services to the general public in and around the
Beaumont, Texas area through individual physicians who are licensed to practice
medicine in the State of Texas and who are employed or otherwise retained by
Medical Group.

         B. Business Manager is a validly existing Texas general partnership
that has been duly formed to manage the business aspects of the cardiology
medical practice of Medical Group.

         C. Medical Group desires to focus its energies, expertise and time on
the practice of medicine and on the delivery of medical services to patients,
and to accomplish this goal it desires to delegate the increasingly more complex
business functions of its medical practice to persons with business expertise.

         D. Medical Group wishes to engage Business Manager to provide such
management, administrative and business services as are necessary and
appropriate for the day-to-day administration of the nonmedical aspects of
Medical Group's medical practice, and Business Manager desires to provide such
services, all upon the terms and conditions hereinafter set forth.

         E. Medical Group and Business Manager have determined a fair market
value for the services to be rendered by Business Manager and have developed a
formula for compensation for Business Manager that will allow the parties to
establish a relationship permitting each party to devote its skills and
expertise to the appropriate responsibilities and functions.


                                      -1-
<PAGE>   6
         NOW, THEREFORE, in consideration of the mutual terms, covenants and
conditions herein above and hereinafter set forth, and intending to be legally
bound hereby, the parties hereto agree as follows:

                                   ARTICLE I.

                                  DEFINITIONS

         For the purposes of this Management Services Agreement, the following
terms shall have the meanings ascribed thereto:

         Section 1.1 Adjusted Gross Revenue The term "Adjusted Gross Revenue"
shall mean the sum of Professional Services Revenue and Ancillary Revenue
determined in accordance with GAAP.

         Section 1.2 Adjustments. The term "Adjustments" shall mean any
adjustments on an accrual basis for uncollectible accounts, Medicare, Medicaid
and other payor contractual adjustments, discounts, workers' compensation
adjustments, professional courtesies and other reductions in collectible revenue
that result from activities that do not result in collectible charges.

         Section 1.3 Ancillary Revenue. The term "Ancillary Revenue" shall mean
all revenue actually recorded each month (net of Adjustments) that is not
Professional Services Revenues.

         Section 1.4 Base Management Fee. The term "Base Management Fee" shall
mean the amount determined in accordance with Section 6.1.

         Section 1.5 Budget. The term "Budget" shall mean an operating and
capital expenditure budget of Medical Group for each fiscal year.

         Section 1.6 Business Manager. The term "Business Manager" shall mean
Cardiology Management Partnership, a Texas general partnership, and each entity
that succeeds to the interests of the Business Manager and to whom the
obligations of Business Manager are assigned and transferred.

         Section 1.7 Business Manager Consent. The term "Business Manager
Consent" shall mean the consent granted by Business Manager's representatives to
the Policy Board created pursuant to Article III herein. When any provision of
this Management Services Agreement requires Business Manager Consent, Business
Manager Consent shall not be unreasonably withheld and shall be binding on
Business Manager.


                                      -2-
<PAGE>   7
         Section 1.8 Business Manager Expense. The term "Business Manager
Expense" shall mean an expense or cost incurred by the Business Manager and for
which the Business Manager, and not Medical Group, is financially liable.

         Section 1.9 Confidential Information. The term "Confidential
Information" shall mean any information of Business Manager or Medical Group, as
appropriate (whether written or oral), including all notes, studies, patient
lists, information, forms, business or management methods, marketing data, fee
schedules, or trade secrets of the Business Manager or of Medical Group, as
applicable, whether or not such Confidential Information is disclosed or
otherwise made available to one party by the other party pursuant to this
Management Services Agreement. Confidential Information shall also include the
terms and provisions of this Management Services Agreement and the Budget.
Confidential Information does not include, however, any information that (i) is
or becomes generally available to and known by the public (other than as a
result of an unpermitted disclosure directly or indirectly by the receiving
party or its affiliates, advisors or Representatives); or (ii) has already been
or is hereafter independently acquired or developed by the receiving party
without violating any confidentiality agreement with or other obligation of
secrecy to the furnishing party.

         Section 1.10 GAAP. The term "GAAP" shall mean generally accepted
accounting principles, consistently applied, as set forth in the opinions and
pronouncements of the Accounting by such other entity or other practices and
procedures as may be approved by a significant segment of the accounting
profession, which are applicable to the circumstances as of the date of the
determination. For purposes of this Management Services Agreement, GAAP shall be
applied on an accrual basis in a manner consistent with the historic practices
of the person to which the term applies.

         Section 1.11 Management Fee. The term "Management Fee" shall mean
Business Manager's compensation determined in accordance with in Article VI
hereof.

         Section 1.12 Management Services. The term "Management Services" shall
mean the business, administrative, management and supervisory services to be
provided to Medical Group, including without limitation the provision of
equipment, supplies, support services, marketing and advertising, certain
nonmedical personnel, office space, management, administration, billing and
collection services, financial recordkeeping and reporting and other business
office services, business functions and business affairs.

         Section 1.13 Management Services Agreement. The term "Management
Services Agreement" shall mean this Management Services Agreement by and between
Medical Group and Business Manager and any amendments hereto as may be adopted
as provided in this Management Services Agreement.


                                      -3-
<PAGE>   8
         Section 1.14 Master Transaction Agreement. The term "Master Transaction
Agreement" shall mean the agreement effective as of August 21, 1996, by and
between Raytel Medical Corporation, Raytel Texas Physician Services, Inc.,
Raytel Southeast Management, L.P., Southeast Texas Cardiology Associates II,
P.A., Southeast Texas Cardiology Associates, P.A., Rodolfo P. Sotolongo, M.D.,
Wayne S. Margolis, M.D., Michael L. Smith, M.D., and Miguel Castellanos, M.D.

         Section 1.15 Medical Group . The term "Medical Group" shall mean
Southeast Texas Cardiology Associates II, P.A., a Texas professional
association.

         Section 1.16 Medical Group Account. The term "Medical Group Account"
shall mean the bank account of Medical Group established as described in
Sections 4.8 and 4.9.

         Section 1.17 Medical Group Consent.  The term "Medical Group Consent"
shall mean the consent granted by Medical Group's representatives to the Policy
Board created pursuant to Article III herein. When any provision of this
Management Services Agreement requires Medical Group Consent, Medical Group
Consent shall not be unreasonably withheld and shall be binding on Medical
Group.

         Section 1.18 Medical Group Expense. The term "Medical Group Expense"
shall mean an expense incurred by the Business Manager or Medical Group and for
which Medical Group, and not the Business Manager, is financially liable. Except
as modified in Section 5.2, herein below, Medical Group Expense shall include
such items as salaries for Physicians and physician assistants, benefits and
other related costs (including professional dues, subscriptions, continuing
medical education expenses and travel costs for continuing medical education or
other business travel). In the event Medical Group incurs consulting, accounting
or legal fees without coordinating such engagement through Business Manager, all
fees and expenses so incurred shall also be Medical Group Expenses.

         Section 1.19 Medical Services. The term "Medical Services" shall mean
medical care and services, including but not limited to the practice of
cardiology and all related health care services provided by Medical Group
through the Physicians and other health care providers that are professionally
affiliated with Medical Group.

         Section 1.20 Net Collections. The term "Net Collections" shall mean the
sum of all professional fees actually recorded each month on a cash basis as a
result of professional medical services and related health care services
rendered by the Physicians whether rendered in an outpatient or inpatient
setting.

         Section 1.21 Office. The term "Office" shall mean any office space,
clinic, facility that Business Manager shall own or lease or otherwise procure
for the use of Medical Group.


                                      -4-
<PAGE>   9
         Section 1.22 Office Expense. The term "Office Expense" shall mean all
operating and non-operating expenses incurred by the Business Manager or Medical
Group in the provision of services to Medical Group. Office Expense shall not
include any state or federal income tax or any other expense that is a Medical
Group Expense or a Business Manager Expense. Without limitation, Office Expense
shall include:

                  (a) the salaries, benefits, and other direct costs of all
         employees of Business Manager at the Office and the salaries, benefits,
         and other direct costs of the nonphysician employees of Medical Group,
         but not the salaries, or other direct costs of the Physicians or
         physician assistants (which shall be Medical Group Expenses);

                  (b) the direct cost of any employee or consultant that
         provides services at or in connection with the office for improved
         clinic performance, such as management, billing and collections,
         business office consultation, accounting and legal services, but only
         when such services are coordinated by Business Manager;

                  (c) reasonable recruitment costs and out-of-pocket expenses of
         Business Manager or Medical Group associated with the recruitment of
         additional physician employees of Medical Group;

                  (d) malpractice insurance expenses for Physicians, Business
         Manager employees, and nonphysician employees; comprehensive and
         general liability and vicarious liability insurance covering the Office
         and employees of Medical Group and Business Manager at the Office;

                  (e) the expense of using, leasing, purchasing or otherwise
         procuring the Office and related equipment, including depreciation;

                  (f) the cost of capital (whether as actual interest on
         indebtedness incurred on behalf of Medical Group or as reasonable
         imputed interest on capital advanced by Business Manager) to finance or
         refinance obligations of Medical Group, purchase medical or nonmedical
         equipment, or finance new ventures of Medical Group;

                  (g)      the Base Management Fee;

                  (h) direct costs related to obtaining and maintaining
         capitation or other managed care contracts for professional medical
         services or health care service contracts with medical or health care
         providers;

                  (i) the reasonable travel expenses associated with attending
         meetings,


                                      -5-
<PAGE>   10
         conferences, or seminars to benefit Medical Group;

                  (j) the cost of medical supplies (including but not limited to
         drugs, pharmaceuticals, products, substances, items, or medical
         devices), office supplies, inventory and utilities (excluding, however,
         those medical supplies or medical inventory owned by Medical Group on
         the date of this Management Services Agreement);

                  (k) any state sales tax on those certain enumerated services
         in Article IV that have been determined to be taxable services by the
         state;

                  (l) any interest expense on promissory notes, contractual
         obligations, or the Transaction Documents arising as part of the
         consideration paid to the Physicians pursuant to the Master Transaction
         Agreement and the other Transaction Documents; and

                  (m) all amortization and depreciation expense related to or
         arising as part of the consideration paid to the Physicians pursuant to
         the Master Transaction Agreement and the other Transaction Documents.

         Section 1.23 Original Physicians' Salaries. The term "Original
Physicians' Salaries" shall mean the sum of the salaries paid to the Physicians
as agreed upon at the Effective Date of this Agreement as set forth in Exhibit
5.1A.

         Section 1.24 Performance Fee. The term "Performance Fee" shall mean the
amount payable to the Business Manager, if any, determined under Article VI, as
a Management Fee based upon the Business Manager assisting Medical Group to
achieve certain pre-determined performance criteria.

         Section 1.25 Physician. The term "Physician" shall mean each
individually licensed professional who is employed or otherwise retained by or
associated with Medical Group, each of whom shall meet at all times the
qualifications described in Article V.

         Section 1.26 Policy Board. The term "Policy Board" shall refer to the
body responsible for developing and implementing management and administrative
policies for the overall operation of Medical Group.

         Section 1.27 Practice Territory. The term "Practice Territory" shall
mean the geographic area within the six counties consisting of Jefferson,
Orange, Hardin, Jasper, Chambers and Liberty Counties and within a radius of
thirty (30) miles of any current or future facility from which Medical Group
provides Medical Services in Texas, representing the


                                      -6-
<PAGE>   11
geographic boundaries of the medical practice conducted by Medical Group.

         Section 1.28 Professional Services Revenues. The term "Professional
Services Revenues" shall mean the sum of all professional fees actually recorded
each month on an accrual basis under GAAP (net of Adjustments) as a result of
professional medical services and related health care services rendered by the
Physicians whether rendered in an outpatient or inpatient setting.

         Section 1.29 Representatives. The term "Representatives" shall mean a
party's officers, directors, employees, or other agents or representatives.

         Section 1.30 State. The term "State" shall mean the State of Texas.

         Section 1.31 Term. The term "Term" shall mean the initial and any
renewal periods of duration of this Management Services Agreement as described
in Section 7.1.

                                   ARTICLE II.

                  APPOINTMENT AND AUTHORITY OF BUSINESS MANAGER

         Section 2.1 Appointment. Medical Group hereby appoints Business Manager
as its sole and exclusive agent for the provision of Management Services to the
Medical Group, and Business Manager hereby accepts such appointment, subject at
all times to the provisions of this Management Services Agreement.

         Section 2.2 Authority. Consistent with the provisions of this
Management Services Agreement, Business Manager shall have the responsibility
and commensurate authority to provide Management Services to Medical Group.
Subject to the terms and conditions of this Management Services Agreement,
Business Manager is hereby expressly authorized to provide the Management
Services in any reasonable manner Business Manager deems appropriate to meet the
day-to-day requirements of the business functions of Medical Group. Business
Manager is also expressly authorized to negotiate and execute on behalf of
Medical Group all contracts, including payor, managed care or provider
agreements. The parties acknowledge and agree that Medical Group, through its
Physicians, shall be responsible for and shall have complete authority,
responsibility, supervision and control over the provision of all Medical
Services and other professional health care services performed for patients, and
that all diagnoses, treatments, procedures and other professional health care
services shall be provided and performed exclusively by or under the supervision
of Physicians as such Physicians, in their sole discretion, deem appropriate.
Business Manager shall have no control or supervision over the provision of
Medical Services.

         Section 2.3 Patient Referrals. Business Manager and Medical Group agree
that the


                                      -7-
<PAGE>   12
benefits hereunder do not require, are not payment for, and are not in any way
contingent upon the referral, admission, or any other arrangement for the
provision of any item or service offered by Business Manager to patients of
Medical Group in any facility, laboratory, catheterization laboratory, or health
care operation controlled, managed, or operated by Business Manager.

         Section 2.4 Practice of Medicine. The parties acknowledge that Business
Manager is not authorized or qualified to engage in any activity that may be
construed or deemed to constitute the practice of medicine. To the extent any
act or service herein required by Business Manager should be construed by a
court of competent jurisdiction or by the Texas State Board of Medical Examiners
constitute the practice of medicine, the requirement to perform that act or
service by Business Manager shall be deemed waived and unenforceable.

                                  ARTICLE III.

                      RESPONSIBILITIES OF THE POLICY BOARD

         Section 3.1 Formation and Operation of the Policy Board. The parties
hereby establish a Policy Board that shall be responsible for developing and
implementing management and administrative policies for the overall operation
and management of Medical Group. The Policy Board shall consist of five (5)
members. Business Manager shall designate, in its sole discretion, three (3)
members of the Policy Board, and Medical Group shall designate, in its sole
discretion, two (2) members of the Policy Board. Each party's representatives to
the Policy Board shall have the authority to make decisions on behalf of the
respective party. Except as may otherwise be provided, the act of a majority of
the members of the Policy Board shall be the act of the Policy Board. The
Medical Group shall designate the Executive Director as a member of the Policy
Board.

         Section 3.2 Duties and Responsibilities of the Policy Board. The Policy
Board shall have the following duties, obligations, and authority:

                  (a) Capital Improvements and Expansion. Any renovation and
         expansion plans and capital equipment expenditures with respect to
         Medical Group's facilities shall be reviewed and approved by the Policy
         Board and shall be based upon economic feasibility, physician support,
         productivity and then current market conditions.

                  (b) Patient Fees; Collection Policies. As a part of the annual
         operating budget, the Policy Board shall review and approve the fee
         schedule and collection policies for all physician and ancillary
         services rendered by Medical Group.

                  (c) Ancillary Services. The Policy Board shall approve Medical
         Group-provided ancillary services based upon the pricing, access to and
         quality of such


                                      -8-
<PAGE>   13
         services.

                  (d) Provider and Payor Relationships. Decisions regarding the
         establishment or maintenance of relationships with institutional health
         care providers and third party payors shall be approved by the Policy
         Board. The Policy Board shall review and approve discounted fee
         schedules, including capitated fee arrangements.

                  (e) Strategic Planning. The Policy Board shall approve the
         long-term strategic planing objectives.

                  (f) Physician Hiring. The Policy Board shall approve the
         number and type of physicians required for the efficient operation of
         Medical Group's facilities. The Policy Board shall review and approve
         any variations to the restrictive covenants in any physician employment
         contract.

                  (g) Grievance Referrals. The Policy Board shall consider and
         make recommendations to Medical Group regarding grievances pertaining
         to matters not specifically addressed in this Management Services
         Agreement as referred to it by Medical Group's Board of Directors.

                  (h) Policy Board Meetings. The Policy Board meetings shall be
         held as mutually agreed, but at least quarterly, in Jefferson County,
         Texas.

                  (i) Relationship to Business Manager. The Policy Board does
         not have the authority to remove, replace, or supersede the Business
         Manager.

                  (j) Annual Budget. The Policy Board shall approve the Budget
         prepared in accordance with Section 4.10, herein, and once approved
         will remain the Budget until a new Budget is adopted by the Policy
         Board. It shall require the four-fifths (4/5ths) vote of the Policy
         Board to change the Performance Fee and Monthly Fee contained in the
         schedules attached to the Budget.

         Section 3.3 Medical Decisions. Despite the above listing of activities
and areas of interest, all medical decisions will be made solely by physicians,
but nonphysician members of the Policy Board may participate in the discussion
process. The physician members of the Policy Board shall review and resolve
issues relating to:

                  (a) Types and levels of Medical Services to be provided;

                  (b) Recruitment of physicians to Medical Group, including the
         specific qualifications and specialties of recruited physicians;

                  (c) Fee schedules; and

                  (d) Any other function or decision that the parties agree is
         medical related.


                                      -9-
<PAGE>   14
                                   ARTICLE IV.

               COVENANTS AND RESPONSIBILITIES OF BUSINESS MANAGER

         During the Term, Business Manager shall serve generally in a
supervisory capacity in order to best oversee all aspects of the Management
Services provided hereunder, specifically by arranging and coordinating such
Management Services as Business Manager, in its supervisory capacity, deems
necessary and appropriate to facilitate the day-to-day administration of the
business aspects of Medical Group's operations, including without limitation
those set forth in this Article IV in accordance with all law, rules,
regulations and guidelines applicable to the provision of Management Services.

         Section 4.1 Office and Equipment

                  (a) As necessary and appropriate, taking into consideration
         the professional concerns of Medical Group, Business Manager shall
         lease, acquire or otherwise procure an Office in a location or
         locations reasonably acceptable to Medical Group and shall permit
         Medical Group to use the Office. Any Office procured by Business
         Manager for the use by Medical Group shall be procured at commercially
         reasonable rates. Any move from Medical Group's present practice
         location(s) shall be done only after Business Manager has received
         Medical Group's Consent.

                  (b) Business Manager shall provide all nonmedical equipment,
         fixtures, office supplies, furniture and furnishings deemed reasonably
         necessary by Business Manager for the operation of the Office and
         reasonably necessary for the provision of Medical Services.

                  (c) Business Manager shall provide, finance, or cause to be
         provided or financed medical related equipment as requested by Medical
         Group. Subject to economic feasibility, Medical Group shall have final
         authority in all medical equipment selections. All medical and
         nonmedical equipment acquired for the use of Medical Group shall be
         owned by Business Manager.

                  (d) Business Manager shall be responsible for the care,
         custody, and control, including repair and maintenance of the Office,
         consistent with Business Manager's responsibilities under the terms of
         any lease or other use arrangement, and for the repair, maintenance,
         and replacement of all equipment other than such repairs, maintenance
         and replacement necessitated by the negligence or willful misconduct of
         Medical Group, its Physicians or other personnel employed by Medical
         Group, the repair or replacement of which shall be a Medical Group
         Expense and not an Office Expense.


                                      -10-
<PAGE>   15
         Section 4.2 Medical Supplies. Business Manager shall order, procure,
purchase and provide on behalf of and as agent for Medical Group all reasonable
medical supplies unless otherwise prohibited by federal and/or State law.
Furthermore, Business Manager shall ensure that the Office is at all times
adequately stocked with the medical supplies appropriate for the operation of
Medical Group and required for the provision of Medical Services. The ultimate
oversight, supervision and ownership, to the extent necessary, for all medical
supplies is and shall remain the sole responsibility of Medical Group. As used
in this provision the term "medical supplies" shall mean all drugs,
pharmaceuticals, products, substances, items or devices whose purchase,
possession, maintenance, administration, prescription or security requires the
authorization or order of a licensed health care provider or requires a permit,
registration, certification or other governmental authorization held by a
licensed health care provider as specified under any federal and/or State law.

         Section 4.3 Support Services. Business Manager shall coordinate,
supervise, or otherwise arrange for all printing, stationery, forms, postage,
duplication or photocopying services, and other support services as are
reasonably necessary and appropriate for the operation of the Office and the
provision of Medical Services therein.

         Section 4.4 Quality Assurance Risk Management and Utilization Review.
Business Manager shall assist Medical Group in Medical Group's establishment and
implementation of procedures to ensure the consistency, quality,
appropriateness, and medical necessity of Medical Services provided by Medical
Group, and shall arrange for administrative support for Medical Group's overall
quality assurance, risk management and utilization review programs.

         Section 4.5 Licenses and Permits. Business Manager shall, on behalf of
and in the name of Medical Group, coordinate all development and planning
processes, and apply for and use reasonable efforts to obtain and maintain all
federal, State, and local licenses and regulatory permits required for or in
connection with the operation of Medical Group and equipment (existing and
future) located at the Office, other than those relating to the practice of
medicine or the administration of drugs by Physicians retained by or associated
with Medical Group.

         Section 4.6 Personnel. Business Manager shall coordinate and supervise
the retention of and shall oversee the selection, hiring, training, supervision
and termination of all management, administrative, clerical, secretarial,
bookkeeping, accounting, payroll, billing and collection and other nonphysician
personnel of Medical Group to enable Business Manager to perform its duties and
obligations under this Management Services Agreement. Business Manager shall
have sole responsibility for determining the salaries and providing such fringe
benefits, and for withholding, as required by law, any sums for income tax,
unemployment insurance, social security, or any other withholding required by
applicable law or governmental requirement.


                                      -11-
<PAGE>   16
         Section 4.7 Contract Negotiations. Business Manager shall negotiate,
either directly or on Medical Group's behalf all contractual arrangements with
third parties as are reasonably necessary and appropriate for Medical Group's
provision of Medical Services, including, without limitation, negotiated price
agreements with third party payors, employers, employer groups, alternative
delivery systems, or other purchasers of group health care services.

         Section 4.8 Billing and Collection. On behalf of and for the account of
Medical Group, Business Manager shall have the exclusive right to establish and
maintain, on behalf of Medical Group, all credit and billing and collection
policies and procedures, and shall coordinate and supervise Medical Group
personnel to ensure the timely billing and collection of all professional and
other fees for all billable Medical Services provided by Medical Group or
Physicians. Business Manager shall advise and consult with Medical Group
regarding the fees for Medical Services provided by Medical Group; it being
understood, however, that Business Manager shall establish the fees to be
charged for Medical Services. In connection with the billing and collection
services to be provided hereunder, and throughout the Term (and thereafter as
provided in Section 7.3), Medical Group hereby grants to Business Manager an
exclusive special power of attorney and appoints Business Manager as Medical
Group's exclusive true and lawful agent and attorney-in-fact, and Business
Manager hereby accepts such special power of attorney and appointment, for the
following purposes:

                  (a) To supervise and coordinate the billing of Medical Group's
         patients, in the name of Medical Group's and on behalf of Medical Group
         for all billable Medical Services provided by Medical Group to
         patients.

                  (b) To supervise and coordinate the billing in Medical Group's
         name and on Medical Group's behalf, as applicable, all claims for
         reimbursement or indemnification from Blue Shield/Blue Cross, insurance
         companies, Medicare, Medicaid, and all other third party payors or
         fiscal intermediaries for all covered billable Medical Services
         provided by Medical Group to patients.

                  (c) To ensure the collection and receipt in Medical Group's
         name and on Medical Group's behalf, all accounts receivable generated
         by such billings and claims for reimbursement that have not been
         purchased by Business Manager, to administer such accounts including,
         but not limited to, (i) extending the time of payment of any such
         accounts for cash, credit or otherwise; (ii) discharging or releasing
         the obligors of any such accounts; (iii) with the consent of the Policy
         Board, suing, assigning or selling at a discount such accounts to
         collection agencies; or (iv) with the of the Policy Board, taking other
         measures to require the payment of an any such accounts.

                  (d) To deposit all amounts collected in Medical Group's name
         and on behalf


                                      -12-
<PAGE>   17
         of Medical Group into Medical Group Account which shall be and at all
         times in Medical Group's name. Medical Group covenants to transfer and
         deliver to Business Manager for deposit into Medical Group Account or
         itself to make such deposit of all funds received by Medical Group from
         patients or third party payors for Medical Services. Upon receipt by
         Business Manager of any funds from patients or third party payors or
         from Medical Group pursuant hereto for Medical Services, Business
         Manager shall immediately deposit same into the Medical Group Account.
         Business Manager shall disburse such deposited funds to creditors and
         other persons on behalf of Medical Group, maintaining records of such
         receipt and disbursement of funds as directed by Medical Group.

                  (e) To take possession of, endorse in the name of Medical
         Group, and deposit into the Medical Group Account any notes, checks,
         money orders, insurance payments, and any other instruments received in
         payment for Medical Services.

                  (f) To sign checks, drafts, bank notes or other instruments on
         behalf of Medical Group, and to make withdrawals from the Medical Group
         Account for payments specified in this Management Services Agreement
         and as requested from time to time by Medical Group.

Upon request of Business Manager, Medical Group shall execute and deliver to the
financial institution wherein the Medical Group is maintained, such additional
documents or instruments as may be necessary to evidence or effect the special
and limited power of attorney granted to Business Manager by Medical Group
pursuant to this Section 4.8 or pursuant to Section 4.9 of this Management
Services Agreement. The special and limited power of attorney granted herein
shall be coupled with an interest and shall be irrevocable except with Business
Manager's written consent. The irrevocable power of attorney shall expire on the
later of when this Management Services Agreement has been terminated, when all
accounts receivable purchased by Business Manager have been collected, or when
all Management Fees due to Business Manager have been paid. If Business Manager
assigns this Management Services Agreement in accordance with its terms, then
Medical Group shall execute a power of attorney in favor of the assignee and in
the form of Exhibit 4.8 attached hereto.

         Section 4.9 Medical Group Account.

                  (a) Power of Attorney. Business Manager shall have access to
         the Medical Group Account solely for the purposes stated herein. In
         connection herewith and throughout the Term (and thereafter as provided
         in Section 7.3), Medical Group hereby grants to Business Manager an
         exclusive special power of attorney for the purposes herein and
         appoints Business Manager as Medical Group's exclusive true and lawful
         agent and attorney-in-fact, and Business Manager hereby accepts such
         power of


                                      -13-
<PAGE>   18
         attorney and appointment, to deposit into the Medical Group
         Account all funds, fees, and revenues generated from the Medical
         Group's provision of Medical Services and collected by Business
         Manager, and to make withdrawals from Medical Group Account for
         payments specified in this Management Services Agreement and as
         requested from time-to-time by Medical Group.

                  (b) Priority of Payments. Each month, Business Manager shall
         apply funds that are in the Medical Group Account in the following
         order of priority:

                           (1) to Medical Group, all Original Physician Salaries
                  (all other expenses incurred by Medical Group for such
                  expenses as attorneys, accountants, and consultants, as well
                  as other expenses for continuing medical education,
                  professional society meetings, and other similar expense shall
                  be paid by Medical Group out of its portion of the balance
                  remaining after payment of the items set forth in
                  subparagraphs (2) through (4), herein below);

                           (2) to Business Manager, Office Expenses, except the
                  Base Management Fee;

                           (3) to Business Manager, the Base Management Fee;

                           (4) to Business Manager, any Performance Fee to which
                  Business Manager may be entitled; and

                           (5) the remaining balance shall remain with the
                  Medical Group.

         Section 4.10        Fiscal Matters.

                  (a)      Annual Budget.

                           (1) Process for Budgets. Annually and at least thirty
                  (30) days prior to the commencement of each fiscal year of
                  Medical Group, Business Manager shall prepare and deliver to
                  Medical Group a proposed Budget, setting forth an estimate of
                  Medical Group's revenues and expenses for the upcoming fiscal
                  year (including, without limitation, the Management Fee and
                  Performance Fee associated with the services provided by
                  Business Manager hereunder). Medical Group shall review the
                  proposed Budget and either approve the proposed Budget or
                  request any changes within fifteen (15) days after receiving
                  the proposed Budget. The Budget shall be deemed adopted by
                  Medical Group unless specific changes are reasonably requested
                  within the fifteen days of receiving the


                                      -14-
<PAGE>   19
                  proposed budget. The Budget may be revised or modified only in
                  consultation with the Business Manager.

                           (2) Obligation of Business Manager. Business Manager
                  shall use commercially reasonable efforts to manage and
                  administer the operations of Medical Group as herein provided
                  so that the actual revenues, costs and expenses of the
                  operation and maintenance of Medical Group during any
                  applicable period of Medical Group's fiscal year shall be
                  consistent with the Budget.

                  (b) Accounting and Financial Records. Business Manager shall
         establish and administer accounting procedures, controls, and systems
         for the development, preparation, safekeeping of administrative or
         financial records and books of account relating to the business and
         financial affairs of Medical Group and the provision of Medical
         Services, all of which shall be prepared and in accordance with GAAP,
         as consistently applied, and applicable laws and regulations. Business
         Manager shall prepare and deliver to Medical Group, within ninety (90)
         days of the end of each calendar year, a balance sheet and a profit and
         loss statement reflecting the financial status of Medical Group in
         regard to the provision of Medical Services as of the end of such
         calendar year, all of which shall be prepared in accordance with GAAP
         consistently applied.

                  (c) Review of Expenditures. Either one of Medical Group's
         representatives to the Policy Board shall review all expenditures
         related to the operation of Medical Group, but neither shall have the
         power to prohibit or invalidate any expenditure that is consistent with
         the Budget.

                  (d)      Tax Matters.

                           (1) In General. Business Manager shall prepare or
                  arrange for the preparation by an accountant approved in
                  advance by Medical Group (which approval shall not be
                  unreasonably withheld) of all appropriate tax returns and
                  reports required of Medical Group.

                           (2) Sales and Use Taxes. Business Manager and Medical
                  Group acknowledge and agree that although Business Manager
                  generally acts in a supervisory and consultative capacity
                  hereunder by coordinating, overseeing and otherwise
                  facilitating the provision of services, there are certain
                  services provided by Business Manager hereunder that the
                  parties recognize are subject to State sales taxes and for
                  which Business Manager may have a legal obligation to collect
                  such taxes and to remit same to the appropriate tax collection


                                      -15-
<PAGE>   20
                  authorities. Medical Group agrees to the payment of such State
                  sales tax as an Office Expense.

         Section 4.11   Reports and Records.

                  (a) Medical Records. Business Manager shall establish,
         monitor, and maintain procedures and policies for the timely creation,
         preparation, filing and retrieval of all medical records generated by
         Medical Group in connection with Medical Group's provision of Medical
         Services; and, subject to applicable law, shall ensure that medical
         records are promptly available to Physicians and any other appropriate
         persons. All such medical records shall be retained and maintained in
         accordance with all applicable State and federal laws relating to the
         confidentiality and retention thereof. All medical records shall be and
         remain the property of Medical Group.

                  (b) Other Reports and Records. Business Manager shall timely
         create, prepare, and file such additional reports and records as are
         reasonably necessary and appropriate for Medical Group's provision of
         Medical Services, and shall be prepared to analyze and interpret such
         reports and records upon the request of Medical Group.

         Section 4.12 Recruitment of Medical Group Physicians. Business Manager
shall coordinate, supervise or perform all administrative services reasonably
necessary and appropriate to recruit potential physician personnel to become
employees of Medical Group. Business Manager shall provide Medical Group with
agreements to document Medical Group's employment, retention or other service
arrangements with such individuals. It will be and remain the sole and complete
responsibility of Medical Group to interview, select, supervise, and control all
Physicians performing Medical Services or other professional services on behalf
of the Medical Group.

         Section 4.13 Acquisitions of or Mergers with other Medical Groups.
Business Manager shall negotiate all acquisitions of or mergers with any other
medical practices in the Practice Territory. Business Manager agrees to
coordinate all such acquisitions or mergers with the Policy Board in order to
obtain the advice and consent (which shall not be unreasonably withheld) of the
Medical Group representatives regarding the professional qualifications of the
physician groups to be acquired or merged with the Medical Group.

         Section 4.14 Business Manager's Insurance. Throughout the Term,
Business Manager shall, as an Office Expense, obtain and maintain with
commercial carriers, through self-insurance or some combination thereof,
appropriate workers' compensation coverage for Business Manager's employed
personnel provided pursuant to this Management Services Agreement, and
professional, casualty and comprehensive general and vicarious liability
covering Business Manager, Business Manager's personnel, and all of Business
Manager's


                                      -16-
<PAGE>   21
 equipment in such amounts, on such basis and upon such terms and
conditions as Business Manager deems appropriate. Upon the request of Medical
Group, Business Manager shall provide Medical Group with a certificate
evidencing such coverage. Business Manager may also carry, at its own expense,
key person life and disability insurance on any shareholder or Physician
employee of Medical Group in amounts determined reasonable and sufficient by
Business Manager. Business Manager shall be the owner and beneficiary of any
such insurance.

         Section 4.15 No Warranty. Medical Group acknowledges that Business
Manager has not made and will not make any express or implied warranties or
representations that the services provided by Business Manager will result in
any particular amount or level of medical practice or income to Medical Group.

                                   ARTICLE V.

                COVENANTS AND RESPONSIBILITIES OF MEDICAL GROUP

         Section 5.1 Organization and Operation. Medical Group, as a continuing
condition of Business Manager's obligations under this Management Services
Agreement, shall at all times during the Term be and remain legally organized
and operated to provide Medical Services in a manner consistent with all State
and federal laws. Medical Group shall operate and maintain within the Practice
Territory a full time practice of medicine specializing in the provision of
cardiology Medical Services, and for the first five (5) years of the Term of
this Management Services Agreement, Medical Group shall maintain and enforce
employment agreements in the form of Exhibit 5.1 with the Physicians specified
in Exhibit 5.1A. Medical Group shall not amend the employment agreements in any
material manner or waive any material rights of Medical Group thereunder without
the prior approval of Business Manager. Recognizing that Business Manager would
not have entered into this Management Services Agreement but for Medical Group's
covenant to maintain employment agreements with its original shareholders,
Medical Group agrees that any damages, compensation, payment, or settlement
received by Medical Group as liquidated damages from a Physician who terminates
the employment agreement without cause or whose employment agreement is
terminated by Medical Group for cause shall be treated as Ancillary Revenue
under this Agreement.

         Section 5.2 Medical Group Personnel.

                  (a) Physician Personnel. Medical Group shall retain, as the
         Medical Group Expense and not as an Office Expense, that number of
         Physicians, as are reasonably and appropriate in the sole discretion of
         Medical Group for the provision of Medical Services, subject to the
         following conditions:

                           (1) During the first year of this Agreement, the
                           total Original


                                      -17-
<PAGE>   22
                           Physician' Salaries (as defined above in Section 1.23
                           shall remain equal to an aggregate amount of [*] and
                           shall be paid in accordance with the amounts set 
                           forth in Exhibit 5.1A attached hereto;

                           (2) During the subsequent four (4) years of this
                           Agreement, the total amount of the Original
                           Physicians' Salaries shall remain at [*] of Net 
                           Collections, as that term is defined above in 
                           Section 1.20.

                           (3) After the first [*] of this Agreement, Original 
                           Physician Salaries shall become a Medical Group 
                           Expense.

                           (4) Salaries for physicians hired during the term of
                           this Agreement shall be a Medical Group Expense.

                           (5) During the entire Term of this Agreement if the
                           Policy Board determines that it is necessary and
                           appropriate to hire additional physicians, and that
                           Business Manager is required to advance working
                           capital to the Medical Group [*]

                  (b) Revised Priority of Payments. Beginning with the sixth
         year and continuing thereafter for the balance of the term of this
         Agreement, the order of priority in which

         Business Manager shall apply funds shall be as follows:

                           (1) to Medical Group, all Original Physician
                  Salaries;

                           (2) to Business Manager, Office Expenses, except the
                  Base Management Fee;

                           (3) to Business Manager, the Base Management Fee;

                           (4) to Medical Group, other expenses incurred by
                  Medical Group for such expenses as attorneys, accountants, and
                  consultants, as well as other expenses for continuing medical
                  education, professional society meetings, and other similar
                  expense;

[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                      -18-
<PAGE>   23
                           (5) to Business Manager, any Performance Fee to which
                  Business Manager may be entitled; and

                           (6) the remaining balance shall remain with the
                  Medical Group.

                  (c) Each Physician shall hold and maintain a valid and
         unrestricted license to practice medicine in the State of Texas, and
         shall be competent in the practice of cardiology.

                  (d) Except as provided in subparagraph (a), above, Medical
         Group shall be responsible for paying the compensation and benefits as
         applicable, for all Physicians and any other physician personnel or
         other contracted or affiliated physicians, and for withholding, as
         required by law, any sums for income tax, unemployment insurance,
         social security, or any other withholding required by applicable law.
         Business Manager may, on behalf of Medical Group, establish and
         administer the compensation program with respect to such individuals in
         accordance with the written agreement between Medical Group and each
         Physician. Business Manager shall neither control nor direct any
         Physician in the performance of Medical Services for patients.

                  (e) Nonphysician Health Care Personnel. All nonphysician
         health care personnel who provide care services in the diagnostic areas
         shall be employed by or retained by the Business Manager as an Office
         Expense and shall be under Medical Group's control, supervision and
         direction while performing Medical Services for patients.

                  (f) Covenant of Medical Group to Maintain Adjusted Gross
         Revenue Production. The Physicians hereby covenant and agree to
         maintain Adjusted Gross Revenue at [*] during the initial [*] years of
         this Agreement in order to maintain the salary amount specified in
         Section 5.2(a) and provide the basis for the consideration paid
         pursuant to Section 2.03 of the Master Transaction Agreement. In the
         event the Threshold Revenue declines at least [*] during any three (3)
         month period of time and remains at that level for more than six (6)
         months, then the consideration specified in Section 2.03 of the Master
         Transaction Agreement shall be reduced and each Physician shall refund
         to Business Manager a proportionate amount of the consideration, as
         follows:

                           (1) In the event the reduction in Adjusted Gross
                  Revenue is equal to [*] of Threshold Revenue, then the 
                  Physicians shall refund [*]

[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]



                                      -19-
<PAGE>   24
                  percent of the consideration paid pursuant to Section 2.03 of
                  the Master Transaction Agreement; and

                           (2) In the event the reduction in Adjusted Gross
                  Revenue is more than [*] percent, then Physicians shall
                  refund the same percentage of the consideration as the
                  percentage decline in Threshold Revenue.

                           (3) Provided, however, that the refund amount shall
                  be adjusted on an annual basis so that only the unamortized
                  amount of the consideration shall be reduced. Thus, on each
                  anniversary of the Closing, which shall be deemed to be
                  September 18, 1996, for purposes of this Agreement, [*] of the
                  consideration shall have been vested and not subject to the
                  adjustment specified in this Section 5.2(f). For example, if
                  Threshold Revenue declined [*] during year [*] of this
                  Agreement, then the consideration would be reduced by [*] of
                  the [*] decline, or in other words there would be a refund of
                  [*] of the consideration paid to the Physicians, who would
                  then refund a proportionate share of their consideration. The
                  [*] shall be adjusted downwards by the same percentage that
                  the consideration is reduced.

         Section 5.3 Professional Standards. As a continuing condition of
Business Manager's obligations hereunder, each Physician and any other physician
personnel retained by Medical Group to provide Medical Services must (i) comply
with, be controlled and governed by and otherwise provide Medical Services in
accordance with all applicable federal, State and municipal laws, rules,
regulations, ordinances and orders, and the ethics and of care of the medical
community wherein the principal office of each Physician is and (ii) obtain and
retain appropriate medical staff membership with appropriate clinical privileges
at any hospital or health care facility at which Medical Services are to be
provided. Procurement of temporary staff privileges pending the completion of
the medical staff approval process shall satisfy this provision, provided the
Physician actively pursues full appointment and actually receives full
appointment within a reasonable time.

         Section 5.4 Medical Services. The Medical Group shall ensure that
Physicians and nonphysician health care personnel are available to provide
medical services to patients in accordance with the acceptable medical standards
established from time to time by the Business Manager after consultation with
the Medical Group. In the event that Physicians employed by, or shareholders of,
Medical Group are not available to provide Medical Services coverage, Medical
Group shall engage and retain locum tenens coverage. Physicians retained on a
locum tenens basis shall meet all of the requirements of Section 5.3, and the
cost of providing locum tenens coverage shall be a Medical Group Expense. With
the assistance of the Business Manager, Medical Group and the Physicians shall
be responsible for scheduling Physician and nonphysician health care personnel
coverage of all medical procedures. Medical Group shall cause all Physicians to
develop and promote Medical Group.


[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                      -20-
<PAGE>   25
         Section 5.5 Peer Review/Quality Assurance. The Medical Group shall
adopt a peer review/quality assurance program to monitor and evaluate the
quality and cost-effectiveness of Medical Services provided by physician
personnel of Medical Group in accordance with medical standards established from
time to time by the American College of Cardiologists, the American Medical
Association, the Texas Medical Association, and other similar professional
associations, which would be acceptable to Business Manager. Upon request of
Medical Group, Business Manager shall provide administrative assistance to
Medical Group in performing its peer review/quality assurance activities, but
only if such assistance can be provided consistent with maintaining the
confidentiality and nondiscoverability of the processes and actions of the peer
review/quality assurance process of Medical Group.

         Section 5.6 Medical Group's Insurance. The Medical Group shall, as an
Office Expense, obtain and maintain with commercial carriers reasonably
acceptable to Business Manager appropriate worker's compensation coverage for
Medical Group's employed personnel, if any, and professional and comprehensive
general liability and vicarious liability insurance covering Medical Group and
each of the Physicians Medical Group retains or employs to provide Medical
Services. The comprehensive general liability and vicarious liability coverage
shall be in the minimum amount of One Million Dollars ($1,000,000.00); and
professional liability coverage shall be in the minimum amount of One Million
Dollars ($1,000,000.00) for each occurrence and Three Million Dollars
($3,000,000.00) annual aggregate. The insurance policy or policies shall provide
for at least thirty (30) days advance written notice to Medical Group from the
insurer as to any alteration of coverage, cancellation, or proposed cancellation
for any cause. Medical Group shall cause to be issued to Business Manager by
such insurer or insurers a certificate reflecting such coverage and shall
provide written notice to Business Manager promptly upon receipt of notice given
to Physician of the cancellation or proposed cancellation of such for any cause.
Upon the termination of this Management Services Agreement for any reason,
Medical Group shall obtain and maintain as a Medical Group Expense "tail"
professional liability coverage, in the amounts specified in this section for an
extended reporting period of 10 years, and Medical Group shall be responsible
for paying all premiums for "tail" insurance coverage; except for a termination
pursuant to Section 7.2(b), in which case Business Manager shall be responsible
for paying all premiums for "tail" insurance coverage. In no event shall the
professional liability insurance carrier be replaced or changed without Medical
Group Consent.

         Section 5.7 Confidential and Proprietary Information. The Medical Group
will not disclose any Confidential Information of Business Manager without
Business Manager's express written authorization, such Confidential Information
will not be used in any way directly or indirectly detrimental to Business
Manager, and Medical Group will keep such Confidential Information confidential
and will ensure that its affiliates and advisors who have access to such
Confidential Information comply with these nondisclosure obligations;


                                      -21-
<PAGE>   26
provided, however, that Medical Group may disclose Confidential Information to
those of its Representatives who need to know Confidential Information for the
purposes of this Management Services Agreement, it being understood and agreed
to by Medical Group that such Representatives will be informed of the
confidential nature of the Confidential Information, will agree to be bound by
this Section , and will be directed by Medical Group not to disclose to any
other person any Confidential Information. Medical Group agrees to be
responsible for any breach of this Section by its advisors, or Representatives.
If Medical Group is requested or required (by oral questions, interrogatories,
requests for information or documents, subpoenas, civil investigative demands,
or similar processes) to disclose or produce any Confidential Information
furnished in the course of its dealings with Business Manager or its advisors,
or Representatives, Medical Group will (i) provide Business Manager with prompt
notice thereof and copies, if possible, and, if not, a description, of the
Confidential Information requested or required to be produced so that Business
Manager may seek an appropriate protective order or waive compliance with the
provisions of this Section and (ii) consult with Business Manager as to the
advisability of Business Manager's taking of legally available steps to resist
or narrow such request. Medical Group further agrees that, if in the absence of
a protective order or the receipt of a waiver hereunder Medical Group is
nonetheless, in the written opinion of its legal counsel, compelled to disclose
or produce Confidential Information concerning Business Manager to any tribunal
legally authorized to request and entitled to receive such Confidential
Information or to stand liable for contempt or suffer other censure or penalty,
Medical Group may disclose or produce such Confidential Information to such
tribunal without liability hereunder, provided, however, that Medical Group
shall give Business Manager written notice of the Confidential Information to be
so disclosed or produced as far in advance of its disclosure or production as is
practicable and shall use its best efforts to obtain, to the greatest extent
practicable, an order or other reliable assurance that confidential treatment
will be accorded to such Confidential Information so required to be disclosed or
produced.

         Section 5.8 Noncompetition. The Medical Group hereby recognizes and
acknowledges that Business Manager will incur substantial costs in providing the
equipment, support services, personnel, management, administration, and other
items and services that are the subject matter of Management Services Agreement
and that in the process of providing services under this Management Services
Agreement, Medical Group will be privy to financial and Confidential
Information, to which Medical Group would not otherwise be exposed. The parties
also recognize that the services to be provided by Business Manager will be
feasible only if Medical Group operates an active practice to which the
Physicians associated with Medical Group devote their full professional time and
attention. Medical Group agrees and acknowledges that the noncompetition
covenants described hereunder are necessary for the protection of Business
Manager, and that Business Manager would not have entered into this Management
Services Agreement without the following covenants.


                                      -22-
<PAGE>   27
                  (a) During the Term of this Management Services Agreement and
         except for its obligations pursuant to this Management Services
         Agreement, Medical Group shall not establish, operate, or provide
         Medical Services at a medical office, clinic or other health care
         facility anywhere within the Practice Territory.

                  (b) Except as specifically agreed to by Business Manager in
         writing and except as otherwise specifically provided herein, Medical
         Group covenants and agrees that during the Term of this Management
         Services Agreement and for a period of [*] years from the date this
         Management Services Agreement is terminated, Medical Group shall not
         directly or indirectly (excluding ownership of less than five percent
         (5%) of the of equity of any publicly traded entity), manage, operate,
         control, or be otherwise associated with, lend funds to, lend its name
         to, or maintain any interest whatsoever in any enterprise (i) having to
         do with the provision, distribution, promotion, or advertising of any
         type of management or services or products to third parties in
         competition with Business Manager, in the Practice Territory; and/or
         (ii) offering any type of service(s) or product(s) to third parties
         similar to those offered by Business Manager to Medical Group in the
         Practice Territory. Notwithstanding the above restriction, nothing
         herein shall prohibit Medical Group or any of its shareholders from
         providing management and administrative services to its or their own
         medical practices after the termination of this Management Services
         Agreement.

                  (c) The written employment agreements described in Section 5.1
         shall contain covenants of the shareholder employees pursuant to which
         the shareholders agree not to compete with Medical Group within the
         Practice Territory for [*] years after termination of their respective
         employment agreement, except as otherwise specifically provided herein.

                  (d) Medical Group understands and acknowledges that the
         provisions in Section 5.7 and Section 5.8 are designed to preserve the
         goodwill of Business Manager and the goodwill of the individual
         Physicians of Medical Group. Accordingly, if Medical Group breaches any
         obligation of Section 5.7 or Section 5.8, in addition to any other
         remedies available under this Management Services Agreement, at law or
         in equity, Business Manager shall be entitled to enforce this
         Management Services Agreement by injunctive relief and by specific
         performance of the Management Services Agreement, such relief to be
         without the necessity of posting a bond, cash or otherwise.
         Additionally, nothing in this paragraph shall limit Business Manager's
         right to recover any other damages to which it is entitled as result of
         Medical Group's breach. If any provision of the covenants is held by a
         court of competent jurisdiction to be unenforceable due to an excessive
         time period, geographic area, or restricted activity, the covenant
         shall be reformed to comply with such time period, geographic area, or
         restricted activity that would be held enforceable.


[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
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                                      -23-
<PAGE>   28
         Section 5.9 Name, Trademark. Medical Group represents and warrants that
Medical Group conducts its professional practice under the name of, and only
under the name of "Southeast Texas Cardiology Group, P.A." and that such name is
the name of Medical Group under State law, and that Medical Group is the sole
and absolute owner of the name. Medical Group covenants and promises that,
without the prior written consent of the Business Manager, Medical Group will
not:

                  (a) take any action or omit to take any action that is
         reasonably likely to result in the change or loss of the name;

                  (b) license, sell, give, or otherwise transfer the name or the
         right to use the name to any medical practice, physician, professional
         corporation, professional association, or any other entity; or

                  (c) cease conducting the professional practice of Medical
         Group under the name.

                                   ARTICLE VI.

                             FINANCIAL ARRANGEMENT

         Section 6.1 Definitions. For purposes of this Article VI, capitalized
terms used herein shall have the meanings ascribed as follows:

                  (a) Monthly Fee. The Monthly Fee shall be [*] per month for
         the first year. As part of the budgeting process the Monthly Fee shall
         be adjusted annually at the beginning of each fiscal year, in order
         for Business Manager to provide proper staffing levels to support
         Medical Group.

                  (b) Fee Amount. The Fee Amount shall be the Monthly Fee and
         for each prior month in which the Base Management Fee is less than the
         Monthly Fee, the sum of the amounts of any such shortfall not
         previously paid.

                  (c) Base Management Fee. The Base Management Fee shall be the
         lesser of the Fee Amount or the amount of cash available to be paid by
         the Medical Group out of the Medical Group Account pursuant to 
         Sections 4.8 and 4.9 hereof.

         Section 6.2 Compensation. Medical Group and Business Manager agree to
the compensation set forth herein as being paid to Business Manager in
consideration of a substantial commitment made by Business Manager hereunder and
that such fees are fair and reasonable. Each month, in the priority established
by Section 4.9(b), Business Manager shall be paid the following:


[*CONFIDENTIAL TREATMENT REQUESTED -- OMITTED PORTIONS FILED SEPARATELY WITH THE
SECURITIES AND EXCHANGE COMMISSION]

                                      -24-
<PAGE>   29
                  (i) the amount of all Office Expenses (other than the Base
         Management Fee) paid on behalf of Medical Group.

                  (ii) the Base Management Fee.

                  (iii) the Performance Fee if the mutually agreed upon
         pre-established criteria for payment of the Performance Fee set forth
         in the Budget have been met.

         Section 6.3 Adjustments. Adjustments to the Management Fee calculation
shall be made as follows:

                  (a) Upon termination of this Management Services Agreement
         (except as provided in Section 7.2(b)(iv) herein below), a liability
         for the Management Fee shall be established in an amount equal to the
         difference, if any, between (i) the cumulative Base Management Fees
         during the Term less (ii) the amounts already paid by Medical Group as
         Base Management Fees, and the Base Management Fee and any cumulated but
         unpaid Performance Fees shall become immediately due and payable.

                  (b) After the fifth anniversary of this Management Services
         Agreement, the Monthly Fee shall increase each year by the lesser of
         five per cent (5%) per year or the increase, if any, from the prior
         year in the Consumer Price Index - Health/Medical Services, as
         published by the United States Department of Labor ("DOL"), for the
         Beaumont, Texas metropolitan area. If the DOL ceases publishing the
         Consumer Price Index - Health/Medical Services, or ceases to publish
         the Consumer Price Index - Health/Medical Services of Beaumont, Texas
         metropolitan area, the parties shall use any other comparable index
         selected by the Business Manager.

                  (c) If there are not sufficient funds to pay the Performance
         Fee, unpaid amounts shall accumulate and carry over from month to month
         until paid. No amounts carried over shall earn interest. Furthermore,
         the amount of the Performance Fee paid will be monitored and reconciled
         on an annual basis and any overpayment of the Performance Fee shall be
         promptly refunded by the Business Manager.

         Section 6.4 Reasonable Value. Payment of the Base Management Fee or
Performance Fee is not intended to be and shall not be interpreted or applied as
permitting Business Manager to share in Medical Group's fees for Medical
Services or any other services. Rather, such payment is acknowledged as the
parties' negotiated agreement as to the reasonable fair market value of the
management expertise, strategic planning, capital access, resource retention,
equipment, contract analysis and support, purchasing, office space, and other
management and administrative oversight services supervised, coordinated,
arranged for or otherwise facilitated by Business Manager pursuant to this
Management Services


                                      -25-
<PAGE>   30
Agreement, as more specifically set forth in Article IV herein, as well as for
the personnel services Business Manager provides under Section 4.6 hereof,
considering the nature and extent of the services required and the risks assumed
by Business Manager.

         Section 6.5 Payment of Management Fee. To facilitate the payment of the
Management Fee as provided in Section 6.2 hereof, Medical Group hereby expressly
authorizes Business Manager to make withdrawals of the Management Fee from the
Medical Group Account as such fee becomes due and payable during the Term and
thereafter as provided in Section 7.3.

         Section 6.6  Disputes Regarding Fees.

                  (a) It is the parties' intent that any disputes regarding the
         payment of the Management Fee shall be resolved to the extent possible
         by good faith negotiation. Business Manager and Medical Group shall
         negotiate the dispute in good faith, and if an agreement is reached,
         the parties shall implement the resolution without further action.

                  (b) If the parties cannot reach a resolution within a
         reasonable time, Medical Group shall, at its option, submit the dispute
         to mediation. Mediation shall be conducted in Beaumont, Texas in
         accordance with the rules of the National Health Lawyers Association
         Alternative Dispute Resolution Service, and if the amount in dispute is
         $25,000 or less, the mediation shall be binding.

                  (c) If the amount in dispute is greater than $25,000, or if
         the mediation process fails to resolve the dispute, the dispute shall
         be submitted by either party to binding arbitration pursuant to the
         Master Transaction Agreement.

                                  ARTICLE VII.

                              TERM AND TERMINATION

         Section 7.1 Initial and Renewal Term. The Term of this Management
Services Agreement will be for an initial period of forty (40) years after the
effective date, and shall be automatically renewed for successive five (5) year
periods thereafter, provided that neither Business Manager nor Medical Group
shall have given notice of termination of this Management Services Agreement at
least one hundred twenty (120) days before the end of the initial term or any
renewal term, or unless otherwise terminated as provided in Section 7.2 of this
Management Services Agreement.


                                      -26-
<PAGE>   31
         Section 7.2   Termination.

                  (a) Termination By Business Manager. Business Manager may
         terminate this Services Agreement upon the occurrence of any one of the
         following events which shall be deemed to be "for cause":

                           (i) The revocation, suspension, cancellation or
                  restriction of any Medical Group shareholder Physician's
                  license to practice medicine in the State if, in the
                  reasonable discretion of the Business Manager, Medical Group
                  will not be financially viable after such revocation,
                  suspension, cancellation, or restriction;

                           (ii) Medical Group's loss or suspension of its
                  Medicare or Medicaid provider number, and/or Medical Group's
                  restriction from treating beneficiaries of the Medicare or
                  Medicaid programs, or such successor programs;

                           (iii) The dissolution of Medical Group or the filing
                  of a petition in voluntary bankruptcy, an assignment for the
                  benefit of creditors, or other action taken voluntarily or
                  involuntarily under any State or federal statute for the
                  protection of debtors;

                           (iv) Medical Group materially defaults in the
                  performance of any of its material duties or obligations
                  hereunder, and such default continues for sixty (60) days
                  after Medical Group receives notice of the default.

                  (b) Termination By Medical Group. Medical Group may terminate
         this Management Services Agreement upon the following occurrence which
         shall be deemed to be "for cause":

                           (i) If either Business Manager, Raytel Southeast
                  Management, L.P., Raytel Texas Physician Services, Inc., or
                  Raytel Medical Corporation (each a "Raytel Party") is
                  adjudicated a bankrupt and its affairs are ordered to be wound
                  up and then dissolved, or a Raytel Party makes an assignment
                  for the benefit of creditors, or other action is taken
                  voluntarily or involuntarily under any State or federal
                  statute for the protection of debtors;

                           (ii) Business Manager is convicted of a felony in
                  connection with the performance of its duties and obligations
                  under this Management Services Agreement;

                           (iii) Business Manager materially defaults in the
                  performance of any


                                      -27-
<PAGE>   32
                  of its material duties or obligations hereunder, and such
                  default continues for sixty (60) days after Business Manager
                  receives notice of the default; or

                           (iv) in the event there is a change in control of the
                  Business Manager. For purposes of this Section 7.2(b)(iv), a
                  "Change in Control" shall mean the sale of substantially all
                  of the assets of the Business Manager or a sale of more than
                  two-thirds (2/3) of the ownership interests of the Business
                  Manager (other than the sale and assignment of the partnership
                  interests provided in Section 8.5 and as contemplated in the
                  Transaction Documents) to a party not approved by the Medical
                  Group. A sale of the ownership interests of Business Manager
                  shall include the Change in Control in Raytel Texas Physician
                  Services, Inc., the corporate General Partner of Raytel
                  Southeast Management, L.P. (except within the controlled group
                  of companies owned or controlled by Raytel Medical
                  Corporation), and shall also include the Change in Control of
                  Raytel Medical Corporation. A Change in Control shall have the
                  result of accelerating the vesting of all consideration paid
                  to the Physicians pursuant to the Master Transaction Agreement
                  and the other Transaction Documents, and shall cause the
                  noncompetition covenants or agreements which are part of the
                  Master Transaction Agreement and the Transaction Documents to
                  be rescinded.

         Termination by Medical Group hereunder shall require the affirmative
         vote of three-fourths of the outstanding voting shares of the common
         shareholders of Medical Group entitled to vote.

                  (c) Termination by Agreement. In the event Medical Group and
         Business Manager shall mutually agree in writing, this Management
         Services Agreement may be terminated on the date specified in such
         written agreement.

         Section 7.3 Legislative, Regulatory or Administrative Change. In the
event there shall be a change in the Medicare or Medicaid statutes, federal or
State statutes, case laws, regulations or general instructions, the
interpretation of any of the foregoing, the adoption of new federal or State
legislation, or a change in any third party reimbursement system, any of which
are reasonably likely to materially and adversely affect the manner in which
either party may perform or be compensated for its services under this
Management Services Agreement or which shall make this Management Services
Agreement unlawful, the parties shall immediately enter into good faith
negotiations regarding a new service arrangement or basis for compensation for
the services furnished pursuant to this Management Services Agreement that
complies with the law, regulation, or policy and that approximates as closely as
possible the economic position of the parties prior to the change. If good faith
negotiations cannot resolve the matter, it shall be submitted to arbitration as
referenced in Section 8.6.


                                      -28-
<PAGE>   33
         Section 7.4 Effects of Termination. Upon termination of this Management
Services Agreement, as herein above provided, neither party shall have any
further obligations hereunder except for (i) obligations accruing prior to the
date of termination, including, without limitation, payment of the Management
Fees and Medical Group Expenses relating to services provided prior to the
termination of this Management Services Agreement, (ii) obligations, promises,
or covenants set forth herein that are expressly made to extend beyond the Term,
including, without limitation, indemnities and noncompetition provisions, which
provisions shall survive the expiration or termination of this Management
Services Agreement by Business Manager for cause, and (iii) the obligations of
Medical Group and Business Manager described in this Section 7.4; provided that
in case of any termination under Section 7.2(b), Medical Group and the
Physicians shall be released, relieved and discharged from any non-compete
agreements or covenants under the Master Transaction Agreement, the Partnership
Interest Purchase Agreement, the respective Employment Agreement for each of the
Physicians, and any Succession Agreement for the Medical Group. In effectuating
the provisions of this Section 7.3, Medical Group specifically acknowledges and
agrees that Business Manager shall continue to collect on behalf of Medical
Group all cash collections from accounts receivable in existence at the time
this Management Services Agreement is terminated (except in the case of
termination under Section 7.2(b) it being understood that such cash collections
will represent, in part, compensation to Business Manager for management
services already rendered, provided however, if this Agreement is terminated by
Medical Group with cause, Business Manager shall not have the right to collect
the accounts receivable. Upon the expiration or termination of this Management
Services Agreement for any reason or cause whatsoever, Business Manager shall
surrender to Medical Group all books and records pertaining to Medical Group's
medical practice.

         Section 7.5 Repurchase Obligation. Upon termination of this Management
Services Agreement by Business Manager for cause, Medical Group shall:

                  (a) Purchase from Business Manager at book value the
         intangible assets, deferred charges, and all other amounts on the books
         of the Business Manager relating to and including the Management
         Services Agreement as adjusted through the last day of the month most
         recently ended prior to the date of such termination in accordance with
         GAAP to reflect amortization or depreciation of the intangible assets,
         deferred charges, or covenants;

                  (b) Purchase from Business Manager any real estate owned by
         Business Manager and used as an Office at the greater of the appraised
         fair market value thereof or the then book value thereof;

                  (c) Purchase at book value all improvements, additions, or
         leasehold improvements that have been made by Business Manager at any
         Office and that relate


                                      -29-
<PAGE>   34
         solely to the performance of Business Manager's obligations under this
         Management Services Agreement;

                  (d) Assume all debt, and all contracts, payables, and leases
         that are obligations of Business Manager and that relate principally to
         the performance of Business Manager's obligations under this Management
         Services Agreement or the properties leased or subleased hereunder by
         Business Manager; and

                  (e) Purchase from Business Manager at book value all of the
         equipment and all other assets, including inventory and supplies,
         tangibles and intangibles, set forth on the books of the Business
         Manager as adjusted through the last day of the month most recently
         ended prior to the date of such termination in accordance with GAAP to
         reflect operations of the Office, depreciation, amortization, and other
         adjustments of assets shown on the books of the Business Manager.

         Section 7.6 Repurchase Option. Upon termination of this Management
Services Agreement by Medical Group for cause, Medical Group shall have the
option but not the obligation to do all or none of the following:

                  (a) Purchase from Business Manager any real estate owned by
         Business Manager and used as an Office at the greater of the appraised
         fair market value thereof or the then book value thereof;

                  (b) Purchase at book value all improvements, additions, or
         leasehold improvements that have been made by Business Manager at any
         Office and that relate solely to the performance of Business Manager's
         obligations under this Management Services Agreement;

                  (c) Assume all debt, and all contracts, payables, and leases
         that are obligations of Business Manager and that relate principally to
         the performance of Business Manager's obligations under this Management
         Services Agreement or the properties leased or subleased by Business
         Manager; and

                  (d) Purchase from Business Manager at book value all of the
         equipment and all other tangible assets, including inventory and
         supplies, set forth on the books of the Business Manager as adjusted
         through the last day of the month most recently ended prior to the date
         of such termination in accordance with GAAP to reflect operations of
         the Office, depreciation, amortization, and other adjustments of assets
         shown on the books of the Business Manager.

         Section 7.7 Closing of Repurchase. Medical Group shall pay cash for the


                                      -30-
<PAGE>   35
repurchased assets. The amount of the purchase price shall be reduced by the
amount of debt and liabilities of Business Manager, if any, assumed by Medical
Group. Medical Group and any Physician associated with Medical Group shall
execute such documents as may be required to assume the liabilities set forth in
Section 7.4(d) or Section 7.5(c) and to remove Business Manager from any
liability with respect to such purchased asset and with to any property leased
or subleased by Business Manager. The closing date for the repurchase shall be
determined by Business Manager but shall in no event occur sooner than sixty
(60) days or later than one hundred eighty (180) days from the date of the
notice of termination.

                                  ARTICLE VIII.

                                 MISCELLANEOUS

         Section 8.1 Administrative Services Only. Nothing in this Management
Services Agreement is intended or shall be construed to allow Business Manager
to exercise control or direction over the manner or method by which Medical
Group and its Physicians perform Medical Services or other professional health
care services. The provision of all Medical Services, including, but not limited
to, the prescription or administration of medicine and drugs, shall be the sole
responsibility of Medical Group and its Physicians, and Business Manager shall
not interfere in any manner or to any extent therewith. Nothing contained in
this Management Agreement shall be construed to permit Business Manager to
engage in the practice of medicine, it being the sole intention of the parties
hereto that the services to be rendered to Medical Group by Business Manager are
solely for the purpose of providing nonmedical and management and administrative
services to Medical Group so as to enable Medical Group to devote its full time
and energies to the professional conduct of its medical practice and provision
of Medical Services to its patients and not to administration or practice
management.

         Section 8.2 Status of Contractor. It is expressly acknowledged that the
parties hereto are independent contractors, and nothing in this Management
Services Agreement is intended and nothing shall be construed to create an
employer/employee, partnership or joint venture relationship.

         Section 8.3 Notices. Any notice, demand, or communication required,
permitted, or desired to be given hereunder shall be in writing and shall be
delivered to the parties at the following respective addresses:

         Medical Group:             Southeast Texas Cardiology Associates, P.A.
                                    2535 Calder Street
                                    Beaumont, Texas   77702
                                    Attn: Rodolfo Sotolongo, M.D.


                                      -31-
<PAGE>   36
         with a copy to:            Orgain, Bell & Tucker, L.L.P.
                                    470 Orleans Street
                                    Beaumont, Texas 77702
                                    Attn: John Creighton, Esq.
                                    Lance Fox, Esq.

         Business Manager:          Raytel Southeast Management, L.P.
                                    2755 Campus Drive, Suite 200
                                    San Mateo, CA 94403
                                    Attn: Michael Kokesh, Esq.

or to such other address, or to the attention of such other person or officer,
as any party may by written notice designate. Any notice, demand, or
communication required, permitted, or desired to be given hereunder shall be
sent either (a) by hand delivery, in which case notice shall be deemed received
when actually delivered, (b) by prepaid certified or registered mail, return
receipt requested, in which case notice shall be deemed five calendar days after
deposit, postage prepaid in the United States mail, or (c) by a nationally
recognized overnight courier, in which case notice shall be deemed received one
business day after deposit with such courier.

         Section 8.4 Governing Law This Management Services Agreement shall be
governed by the laws of the State of Texas applicable to agreements to be
performed wholly within the State. The federal and State courts of Jefferson
County, Texas shall be the exclusive venue for any litigation, special
proceeding, or other proceeding between the parties that may arise out of, or be
brought in connection with or by reason of, this Management Services Agreement.

         Section 8.5 Assignment. Except as may be herein provided to the
contrary, this Management Services Agreement shall inure to the benefit of and
be binding upon the parties hereto and their respective legal representatives,
successors, and assigns; provided, however, that Medical Group may not assign
this Management Services Agreement without the prior written consent of Business
Manager, which consent may be withheld in Business Manager's sole and absolute
discretion. The sale, transfer, pledge, or assignment of any of the common
shares held by any shareholder of Medical Group or the issuance by Medical Group
of common or other voting shares to any other person, or any combination of such
transactions within a period of one (1) year, such that the existing
shareholders in Medical Group fail to maintain a majority of the voting in
Medical Group shall be deemed an attempted assignment by Medical Group, and
shall be null and void unless consented to in writing by Business Manager prior
to any such transfer or issuance. The parties agree that Raytel Southeast
Management L.P. ("Raytel Southeast") shall succeed to all of the rights and
obligations of Cardiology Management Partnership under this Management Services
Agreement, and Raytel


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<PAGE>   37
Medical Corporation guarantee the performance of Raytel Southeast, under this
Management Services Agreement, or any appointed successor. Business Manager
shall have the right to (i) assign its rights and obligations hereunder to any
third party and (ii) collaterally assign its interest in this Management
Services Agreement and its right to collect Management Fees hereunder to any
financial institution or other third party.

         Section 8.6 Arbitration. The parties shall use good faith negotiation
to resolve any controversy, dispute or disagreement arising out of or relating
to this Management Services Agreement or the breach of this Management Services
Agreement. Any matter not resolved by negotiations shall be submitted to binding
arbitration and such arbitration shall be governed by the terms of the Master
Transaction Agreement, which, as it applies to the parties hereto, is
incorporated herein by reference in its entirety.

         Section 8.7 Waiver of Breach. The waiver by either party of a breach or
violation of any provision of this Management Services Agreement shall not
operate as, or be construed to constitute, a waiver of any subsequent breach of
the same or another provision hereof.

         Section 8.8 Enforcement. In the event either party resorts to legal
action to enforce or interpret any provision of this Management Services
Agreement, the prevailing party shall be entitled to recover the costs and
expenses of such action so incurred, including, without limitation, reasonable
attorneys' fees.

         Section 8.9 Gender and Number. Whenever the context of this Management
Services Agreement requires, the gender of all words herein shall include the
masculine, feminine, and neuter, and the number of all words herein shall
include the singular and plural.

         Section 8.10 Additional Assurances. Except as may be herein
specifically provided to the contrary, the provisions of this Management
Services Agreement shall be self-operative and shall not require further
agreement by the parties; provided, however, at the request of either party, the
other party shall execute such additional instruments and take such additional
acts as are reasonable and as the requesting party may deem necessary to
effectuate this Management Services Agreement.

         Section 8.11 Consents, Approvals, and Exercise of Discretion. Whenever
this Management Services Agreement requires any consent or approval to be given
by either party, or either party must or may exercise discretion, and except
where specifically set forth to the contrary, the parties agree that such
consent or approval shall not be unreasonably withheld or delayed, and that such
discretion shall be reasonably exercised.

         Section 8.12 Force Majeure. Neither party shall be liable or deemed to
be in default for any delay or failure in performance under this Management
Services Agreement or other


                                      -33-
<PAGE>   38
interruption resulting from, directly or indirectly, acts of God, civil or
military authority, acts of public enemy, war, accidents, fires, explosions,
earthquakes, floods, failure of transportation, strikes or other work
interruptions by either party's employees, or any other similar cause beyond the
reasonable control of either party unless such delay or failure in performance
is expressly addressed elsewhere in this Management Services Agreement.

         Section 8.13 Severability. The parties hereto have negotiated and
prepared the terms of this Management Services Agreement with the intent that
each and every one of the terms, covenants and conditions herein be binding upon
and inure to the benefit of the respective parties. Accordingly, if any one or
more of the terms, provisions, promises, covenants or conditions of this
Management Services Agreement or the application thereof to any person or
circumstance shall be adjudged to any extent invalid, unenforceable, void or
voidable for any reason whatsoever by a court of competent jurisdiction or an
arbitration tribunal, such provision shall be as narrowly construed as possible,
and each and all of the remaining terms, provisions, promises, covenants and
conditions of this Management Services Agreement or their application to other
persons or circumstances shall not be affected thereby and shall be valid and
enforceable to the fullest extent permitted by applicable law.

         Section 8.14 Divisions and Headings. The divisions of this Management
Services Agreement into articles, sections, and subsections and the use of
captions and headings in connection therewith is solely for convenience and
shall not affect in any way the meaning or interpretation of this Management
Services Agreement.

         Section 8.15 Amendments and Management Services Agreement Execution.
This Management Services Agreement and amendments hereto shall be in writing and
may be executed in multiple copies. Each multiple copy shall be deemed an
original, but all multiple copies together shall constitute one and the same
instrument.

         Section 8.16 Entire Management Services Agreement. With respect to the
subject matter of this Management Services Agreement, this Management Services
Agreement supersedes all previous contracts and constitutes the entire agreement
between the parties. Neither party shall be entitled to benefits other than
those specified herein. No prior oral statements or contemporaneous negotiations
or understandings or prior written material not specifically incorporated herein
shall be of any force and effect, and no changes in or additions to this
Management Services Agreement shall be recognized unless incorporated herein by
amendment as provided herein, such amendments to become effective on the date
stipulated in such amendments. The parties specifically acknowledge that, in
entering into and executing this Management Services Agreement, the parties rely
solely upon the representations and agreements contained in this Management
Services Agreement and no others.


                                      -34-
<PAGE>   39
IN WITNESS WHEREOF, Medical Group and Business Manager have caused this
Management Services Agreement to be executed by their duly authorized
representatives, all as of the day and year first above written.

MEDICAL GROUP:                               BUSINESS MANAGER:

SOUTHEAST TEXAS CARDIOLOGY                   CARDIOLOGY MANAGEMENT
ASSOCIATES II, P.A.,                         PARTNERSHIP
a Texas professional association             a Texas general partnership

By:  /s/ Rodolfo Sotolongo                  By:/s/ Wayne Margolis
    -------------------------                  ----------------------------
         Rodolfo Sotolongo, M.D.                  Wayne Margolis, M.D.
Title:   President                           Title:   Administrative Partner





                                    GUARANTY

This Management Services Agreement shall be assigned to Raytel Southeast
Management, L.P., pursuant to Section 8.5, herein above, as part of the series
of transactions set forth in the Master Transaction Agreement, and Raytel
Medical Corporation, a party to the Master Transaction Agreement hereby
guarantees the performance of Raytel Southeast Management, L.P. as the Business
Manager of each and every duty, responsibility, obligation, and covenant set
forth herein.

RAYTEL MEDICAL CORPORATION

By: /s/ E. Payson Smith, Jr.
   -------------------------------
         E. Payson Smith, Jr.
Its:     Senior Vice President and
         Chief Financial Officer.


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