Document:

<PAGE>

                                                                   EXHIBIT 10.30

September 8, 1999

Jeff Arnold
Cambridge Heart, Inc.
One Oak Park Drive
Bedford, MA  01730

Dear Jeff:

The Compensation Committee of the Cambridge Heart Board of Directors met to
review and propose changes to your compensation.  We have agreed on the
following:

1.  Contract:  Renew for three years
    --------

2.  Base Salary:  Increase to $215,000
    ------------

3.  Bonus Potential: Increase to 50% of base salary, based on achievement of
    ---------------
    milestones approved by the Board.

4.  Immediate Stock Option Grant: 100,000 shares vesting over four years,
    ----------------------------
    consistent with the company's stock option plan.

5.  Annual Stock Option Grant: Maximum of 65,000 shares, decided by the Board at
    -------------------------
    year-end based on achievement of milestones:

    .  Raising an additional $5MM

    .  Release of Treadmill TWA and SAECG prior to end of October

    .  Signing an OEM deal with Marquette, Quinton or Spacelabs prior
       to the end of 1999

    .  Start of a prophylactic ICD pilot with funding from Medtronic,
       Guidant or St. Jude or commitment of funding for the full
       study prior to the end of 1999

    .  30 Domestic sites buying at least 300 electrode sets per
       month in Q4

    .  Assessment for RBRVS units complete; on agenda for ACC or
       NASPE reimbursement committee; 50 submissions for reimbursementEXHIBIT 10.31

                                                                   [LOGO]
                                                           CAMBRIDGE HEART, INC.

MEMO

To:    File

From:  Jeff Arnold, J. Daniel Cole

CC:    Bob P. Hardy, Helaine Carroll

Date:  October 25, 1999

Re:    Renewal of J. Arnold Contract

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

At the meeting of October 21, 1999 the Board authorized the renewal of J.
Arnold's employment contract dated September 1, 1993.  This renewal in
accordance with recommendations of the Compensation Committee dated September 8
(attached) and other actions at that meeting.

This memo clarifies some items not specified in the recommendations of the
Compensation Committee.  These items are in italics.

1.  Contract.  The Contract is renewed for three years THROUGH SEPTEMBER 1,
    --------
    2000.

2.  Base Salary.  The Base Salary is increased to $215,000 RETROACTIVELY TO
    -----------
    SEPTEMBER 1, 1999.

3.  Bonus.  No change to attached.
    -----

4.  Immediate Stock Option Grant.  100,000 shares vesting over four years,
    ----------------------------
    consistent with the Company's Stock Option Plan. APPROVED AS OF THE
    TELEPHONIC BOARD MEETING OF OCTOBER 5, 1999. EXERCISE PRICE OF $2.94.

5.  Annual Stock Option Grant.  No change to attached.
    -------------------------

6.  Severance.  Increased from nine to twelve months.  ACCELERATED VESTING OF
    ---------
    UNVESTED SHARES FOR TERMINATION DUE TO A CHANGE IN CONTROL. ACCELERATED
    VESTING OF 50% OF THE UNVESTED PORTION IN THE EVENT OF A CHANGE IN CONTROL
    WITHOUT TERMINATION.

/s/ Jeff Arnold                           /s/  J. Daniel Cole
------------------------------            --------------------------------
Jeff Arnold, CEO                          J. Daniel Cole, Director

 . Page 1
<PAGE>

6.  Severance.  Increased from nine to twelve months.

Please indicate agreement with your signature below.

/s/ Jeff Arnold                          /s/ J. Daniel Cole
------------------------------           ------------------------------
Jeff Arnold CEO                          J. Daniel Cole
                                         Director

                                         /s/ Rolf Stutz
                                         ------------------------------
                                         Rolf Stutz
                                         Director

                                         /s/ Harris Berman
                                         ------------------------------
                                         Harris Berman
                                         Director<PAGE>

                                                                   EXHIBIT 10.32

[LOGO]
CAMBRIDGE HEART

                                                November 18, 1999

Robert Palardy
VP of Finance/CFO
Cambridge Heart, Inc.
One Oak Park Drive
Bedford, MA  01730

Re:  Severance Agreement

Dear Bob:

     Cambridge Heart, Inc. (the "Company") recognizes that, as is the case with
many publicly-held corporations, the possibility of a change in control of the
Company exists and that such possibility, and the uncertainty and questions it
may raise among key personnel, may result in the departure or distraction of key
personnel to the detriment of the Company and its stockholders.  The Board of
Directors has determined that, while there are no current plans for the Company
to engage in a change of control transaction, appropriate steps be taken to
reinforce and encourage the continued employment and dedication of the Company's
key personnel without distraction from the possibility of a change of control
and related events and circumstances.

     Accordingly, the Company agrees as follows:

     1.  In the event that the Company terminates your employment without Cause,
then the following shall apply:

         o  You will continue to be paid your salary for six (6) months after
            termination at the rate in effect on the termination date.

         o  You will continue for six (6) months to be enrolled in the health
            insurance program you were enrolled in as of the termination date.

         o  The vesting of all stock options you hold as of the termination date
            will be accelerated as follows: the number of shares under all such
            options that would have become vested (i.e., exercisable) during the
            twelve (12) month period following the termination date shall become
            exercisable; you must exercise all options (including the
            accelerated portion) within the time periods set forth in your
            option agreement(s) and the applicable option plan.

        Cambridge Heart, Inc. * 1 Oak Park Drive * Bedford, MA  01730
                   * Phone: 781-271-1200 * Fax: 781-275-8431
                            www.cambridgeheart.com
<PAGE>

     2.  In the event that a Change in Control occurs, the following shall
apply:

         o  The vesting of all stock options you hold as of the Change in
            Control Date will be accelerated as follows: fifty percent (50%) of
            the number of shares under all such options that were not vested
            (i.e., exercisable) as of the Change in Control Date shall become
            exercisable as of the Change in Control Date; you must exercise all
            options (including the accelerated portion) within the time periods
            set forth in your options agreement(s) and the applicable option
            plan.

     3.  In the event that a Change in Control occurs and, within twelve (12)
months after the Change in Control Date, your employment (either with the
Company or the successor/acquiror) is terminated without Cause or you terminate
your employment for Good Reason, then the following shall apply:

         o  You will continue to be paid your salary for twelve (12) months
            after termination at the rate in effect on the termination date.

         o  You will continue for twelve (12) months to be enrolled in the
            health insurance program you were enrolled in as of the termination
            date.

         o  The vesting of all stock options you hold as of the Change in
            Control Date will be accelerated as follows: one hundred percent
            (100%) of the number of shares under all such options that were not
            vested (i.e., exercisable) as of the termination date shall become
            exercisable as of the termination date; you must exercise all
            options (including the accelerated portion) within the time periods
            set forth in your options agreement(s) and the applicable option
            plan.

All capitalized terms used in this letter agreement have the meanings set forth
in Exhibit A.
   ---------

This agreement supersedes all other agreements concerning severance.

                                    Sincerely yours,

                                    CAMBRIDGE HEART, INC.

                                    By: /s/ Jeffrey Arnold
                                       -------------------------
                                    Title: /s/ President
                                          ----------------------

AGREED

/s/ Robert Palardy
---------------------
Employee

       Cambridge Heart, Inc. * 1 Oak Park Drive * Bedford, MA  01730 *
                    Phone: 781-271-1200 * Fax: 781-275-8431
                            www.cambridgeheart.com
<PAGE>

                                   EXHIBIT A
                                   ---------

        1.  "Change in Control" means an event or occurrence set forth in any
             -----------------
one or more subsections (a) through (c) below (including an event or occurrence
that constitutes a Change in Control under one of such subsections but is
specifically exempted from another such subsection):

             (a)  the acquisition by an individual, entity or group (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of 1934,
as amended (the "Exchange Act")) (a "Person") of beneficial ownership of any
capital stock of the Company if, after such acquisition, such Person
beneficially owns (within the meaning of Rule 13d-3 promulgated under the
Exchange Act) 50% or more of either (i) the then-outstanding shares of common
stock of the Company (the "Outstanding Company Common Stock") or (ii) the
combined voting power of the then-outstanding securities of the Company entitled
to vote generally in the election of directors (the "Outstanding Company Voting
Securities"); provided, however, that for purposes of this subsection (a), the
              --------
following acquisitions shall not constitute a Change in Control: (i) any
acquisition directly from the Company, (ii) any acquisition by the Company or
(iii) any acquisition by any employee benefit plan (or related trust) sponsored
or maintained by the Company or any corporation controlled by the Company; or

             (b)  such time as the Continuing Directors (as defined below) do
not constitute a majority of the Board (or, if applicable, the Board of
Directors of a successor corporation to the Company), where the term "Continuing
Director" means at any date a member of the Board (i) who was a member of the
Board on the date of the execution of this Agreement or (ii) who was nominated
or elected subsequent to such date by at least a majority of the directors who
were Continuing Directors at the time of such nomination or election or whose
election to the Board was recommended or endorsed by at least a majority of the
directors who were Continuing Directors at the time of such nomination or
election; or

             (c)  the consummation of a merger, consolidation, reorganization,
recapitalization or statutory share exchange involving the Company or a sale or
other disposition of all or substantially all of the assets of the Company (a
"Business Combination"), unless, immediately following such Business
Combination, all or substantially all of the individuals and entities who were
the beneficial owners of the Outstanding Company Common Stock and Outstanding
Company Voting Securities immediately prior to such Business Combination
beneficially own, directly or indirectly, more than 50% of the then-outstanding
shares of common stock and the combined voting power of the then-outstanding
securities entitled to vote generally in the election of directors,
respectively, of the resulting or acquiring corporation in such Business
Combination in substantially the same proportions as their ownership,
immediately prior to such Business Combination, of the Outstanding Company
Common Stock and Outstanding Company Voting Securities, respectively.

         2.  "Change in Control Date" means the first date on which a Change
              ----------------------
in Control occurs.

                                       2

        Cambridge Heart, Inc. * 1 Oak Park Drive * Bedford, MA  01730
                   * Phone: 781-271-1200 * Fax: 781-275-8431
                            www.cambridgeheart.com
<PAGE>

        3.  "Cause" means:
             -----

             (a)  the Employee's willful and continued failure to substantially
perform (his/her) reasonable assigned duties (other than any such failure
resulting from incapacity due to physical or mental illness or any failure after
the Employee gives notice of termination for Good Reason), which failure is not
cured within 30 days after a written demand for substantial performance is
received by the Employee from the Board of Directors of the Company which
specifically identifies the manner in which the Board of Directors believes the
Employee has not substantially performed the Employee's duties; or

             (b)  the Employee's willful engagement in illegal conduct or gross
misconduct which is materially and demonstrably injurious to the Company.

        For purposes of this Section 3, no act or failure to act by the Employee
shall be considered "willful" unless it is done, or omitted to be done, in bad
faith and without reasonable belief that the Employee's action or omission was
in the best interests of the Company.

        4.  "Good Reason" means the occurrence, without the Employee's written
             -----------
consent, of any of the events or circumstances set forth in clauses (a) through
(d) below. Notwithstanding the occurrence of any such event or circumstance,
such occurrence shall not be deemed to constitute Good Reason if, prior to the
notice of termination given by the Employee in respect thereof, such event or
circumstance has been fully corrected and the Employee has been reasonably
compensated for any losses or damages resulting therefrom (provided that such
right of correction by the Company shall only apply to the first notice of
termination for Good Reason given by the Employee).

             (a)  the assignment to the Employee of duties inconsistent in any
material respect with the Employee's position (including status, offices, titles
and reporting requirements), authority or responsibilities in effect immediately
prior to the earliest to occur of (i) the Change in Control Date, (ii) the date
of the execution by the Company of the initial written agreement or instrument
providing for the Change in Control or (iii) the date of the adoption by the
Board of Directors of a resolution providing for the Change in Control (with the
earliest to occur of such dates referred to herein as the "Measurement Date"),
or any other action or omission by the Company which results in a diminution in
such position, authority or responsibilities;

             (b)  a reduction in the Employee's annual base salary as in effect
on the Measurement Date or as the same was or may be increased from time to
time;

             (c)  the failure by the Company to (i) continue in effect any
material compensation or benefit plan or program (including without limitation
any life insurance, medical, health and accident or disability plan and any
vacation program or policy) (a "Benefit Plan") in which the Employee
participates or which is applicable to the Employee immediately prior to the
Measurement Date, unless an equitable arrangement (embodied in an ongoing
substitute or alternative plan) has been made with respect to such plan or
program, (ii) continue the Employee's participation therein (or in such
substitute or alternative plan) on a basis not materially less favorable, both
in terms of the amount of benefits provided and the level of the Employee's
participation relative to other participants, than the basis existing
immediately prior to the Measurement Date or (iii) award cash bonuses to the
Employee in amounts and in a manner substantially consistent with past practice
in light of the Company's financial performance;

                                       3
<PAGE>

             (d)  any failure of the Company to pay or provide to the Employee
any portion of the Employee's compensation or benefits due under any Benefit
Plan within seven days of the date such compensation or benefits are due, or any
material breach by the Company of any employment agreement with the Employee.

                                       4

        Cambridge Heart, Inc. * 1 Oak Park Drive * Bedford, MA  01730
                   * Phone: 781-271-1200 * Fax: 781-275-8431
                            www.cambridgeheart.com

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00005-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00005-of-00352.parquet"}], [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00005-of-00352.parquet"}]]