AMENDMENT TO RETENTION AGREEMENT

     This Amendment, dated as of November __, 1998 (this "Amendment") to the
Retention Agreement dated as of October 15, 1998 (the "Retention Agreement"), is
entered into between Marquette Medical Systems, Inc., a Wisconsin corporation
(the "Company"), and Fred Robertson (the "Executive").  Capitalized terms not
defined herein shall have the respective meanings set forth in the Retention
Agreement.

     WHEREAS, the Company and the Executive desire to amend the Retention
Agreement as set forth herein.

     NOW, THEREFORE, in consideration of the mutual covenants in this Amendment,
the parties hereby agree as follows:

     1.  The third sentence of Section 2.2 of the Retention Agreement is hereby
amended to read in its entirety as follows:

     "If the Executive remains continuously employed by the Company or by a
     company or other entity or organization within the Parent's medical systems
     business on a full-time basis for the period commencing at the Effective
     Time and ending on the second anniversary of the Effective Time (the date
     of such second anniversary being hereinafter called the "Second Anniversary
     Date"), the Company shall cause each Substitute Option held by the
     Executive on the Second Anniversary Date that is not then exercisable to
     become fully exercisable on and after the close of business on the Second
     Anniversary Date, subject to the terms of the Company Stock Option Plan and
     the agreement evidencing such Substitute Option."

     2.   Section 3.3 of the Retention Agreement is hereby amended to read in
its entirety as follows:

     "3.3  Vesting of Stock Options.

          (a) If the employment of the Executive is terminated by the Company
     without Cause or for death or Disability at any time following the
     Effective Time and prior to the First Anniversary Date, each Substitute
     Option shall continue in effect and shall continue to be exercisable upon
     the same terms and conditions (including the schedule for vesting) as were
     applicable to the option for which the Substitute Option was granted

 
     immediately prior to the Effective Time, and on the Second Anniversary Date
     any Substitute Option not then exercisable held by the Executive will
     become fully exercisable.  For the purposes of this Agreement, the date of
     the termination of the Executive's employment shall be deemed to be not
     later than the date of the commencement of the period for which the Company
     is obligated to make monthly severance payments pursuant to Section 3.2
     hereof.  This Agreement supersedes any provision of the Company Stock
     Option Plan (as it may be amended from time to time) inconsistent herewith.

          (b) If the employment of the Executive terminates (x) without Cause,
     for death or Disability prior to the First Anniversary Date or (y) for any
     reason at any time following the First Anniversary Date and prior to the
     Second Anniversary Date: (i) each Substitute Option held by the Executive
     on the date of such termination of employment that is then exercisable
     shall continue to be exercisable for 90 days following the date of such
     termination of employment and shall expire at the close of business on the
     90th day following such termination of employment to the extent not
     exercised and (ii) each Substitute Option held by the Executive on the date
     of such termination of employment that is not then exercisable shall remain
     outstanding and shall continue to become exercisable in accordance with its
     original vesting schedule as it existed at the Effective Time (subject to
     any acceleration provided for in the third sentence of section 2.2 hereof)
     and if such Substitute Option shall become exercisable prior to the Second
     Anniversary Date, such Substitute Option shall continue to be exercisable
     for 90 days following the date on which it shall have become exercisable
     and shall expire at the close of business on the 90th day following the
     date on which it shall have become exercisable to the extent not exercised;
     (iii) each Substitute Option that becomes exercisable on the Second
     Anniversary Date shall continue to be exercisable for 90 days following the
     Second Anniversary Date and shall expire at the close of business on the
     90th day following the Second Anniversary Date to the extent not exercised.

          (c) If the Executive (i) is terminated without Cause or for death or
     Disability prior to the First Anniversary Date, or (ii) shall have earned
     the right to receive the Retention Bonus provided for in Section 2.1 hereof
     in full

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     (whether or not the Executive continues thereafter to be employed by the
     Company or any affiliate thereof), at any time after the date such
     Executive's employment terminates (for purposes of clause (c)(i)) or the
     First Anniversary Date (for purposes of clause (c) (ii)), and prior to the
     Second Anniversary Date, the Executive may deliver a written notice to the
     Company requesting that the Company accelerate the exercisability of all or
     part of the Substitute Options that are then unexercisable, which notice
     shall describe in reasonable detail the circumstances upon which such
     request is based and be accompanied by a completed notice of option
     exercise in the form provided for in the Company Stock Option Plan with
     respect to the number of shares covered by such notice (the "Acceleration
     Request"). The Company shall notify the Executive, in writing, whether it
     has consented to such request (which consent shall not be unreasonably
     withheld or delayed) in light of the circumstances described in such
     request. If the Company consents to such request, such Substitute Options
     shall be deemed to have been exercised as of the date set forth on such
     written consent in the manner described in the Acceleration Request with
     respect to the number of shares covered by such Acceleration Request."

     All other provisions of the Retention Agreement not inconsistent herewith
shall remain in full force and effect.

          IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the day and year first above written.

                       MARQUETTE MEDICAL SYSTEMS, INC.



                       By:  __________________________
                            Name:
                            Title:


                       EXECUTIVE


                       _______________________________

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