THERMO CARDIOSYSTEMS INC
10-K/A, 1999-02-16
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
            ----------------------------------------------------

                AMENDMENT NO. 1 ON FORM 10-K/A TO FORM 10-K

(mark one)
[ X ] Annual Report Pursuant to Section 13 or 15(d) of the Securities
      Exchange Act of 1934 for the fiscal year ended January 3, 1998.

[   ] Transition Report Pursuant to Section 13 or 15(d) of the
      Securities Exchange Act of 1934.

                         Commission file number 1-10114

                            THERMO CARDIOSYSTEMS INC.
             (Exact name of Registrant as specified in its charter)

Massachusetts                                                        04-3027040
(State or other jurisdiction of             (I.R.S. Employer Identification No.)
incorporation or organization)

470 Wildwood Street, P.O. Box 2697
Woburn, Massachusetts                                               01888-2697
(Address of principal executive offices)                            (Zip Code)

     Registrant's telephone number, including area code: (781) 622-1000

        Securities registered pursuant to Section 12(b) of the Act:
     
     Title of each class             Name of exchange on which registered
   Common Stock, $.10 par value                American Stock Exchange

 
        Securities registered pursuant to Section 12(g) of the Act:
                                      None

Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months, and (2) has been subject to the filing requirements for
at least the past 90 days. Yes [ X ] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405
of Regulation S-K is not contained herein, and will not be contained, to the
best of the Registrant's knowledge, in definitive proxy or information
statements incorporated by reference into Part III of this Form 10-K or any
amendment to this Form 10-K. [ ]

The aggregate market value of the voting stock held by nonaffiliates of the
Registrant as of January 30, 1998, was approximately $343,189,000.

As of January 30, 1998, the Registrant had 35,663,409 shares of Common Stock
outstanding (39,019,114 pro forma shares).

                       DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant's Annual Report to Shareholders for the year ended
January 3, 1998, are incorporated by reference into Parts I and II.

Portions of the Registrant's definitive Proxy Statement for the Annual Meeting
of Shareholders to be held on June 1, 1998, are incorporated by reference into
Part III.

<PAGE>


                                                                     FORM 10-K/A

                                     PART IV

Item 14.   Exhibits, Financial Statement Schedules, and Reports on Form 8-K

(c) Exhibits

    13 Annual Report to Shareholders for the year ended January 3, 1998
       (only those portions incorporated herein by reference).

    23 Consent of Arthur Andersen LLP.

<PAGE>


                                                                     FORM 10-K/A

                            THERMO CARDIOSYSTEMS INC.

                                   SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Amendment No. 1 on
Form 10-K/A to be signed on its behalf by the undersigned, thereunto duly
authorized.

Date:  February 16, 1999

                                          THERMO CARDIOSYSTEMS INC.



                                          By: /s/ Paul F. Kelleher
                                             -------------------------
                                             Paul F. Kelleher
                                             Chief Accounting Officer






                                                                   Exhibit 13




















                            THERMO CARDIOSYSTEMS INC.

                        Consolidated Financial Statements

                                      1997
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                        Consolidated Statement of Income

    (In thousands except per share amounts)     1997       1996        1995
    -----------------------------------------------------------------------

    Revenues (Note 11)                      $62,834     $63,962     $52,880
                                            -------     -------     -------

    Costs and Operating Expenses:
      Cost of revenues                       27,143      27,132      22,455
      Selling, general, and administrative
        expenses (Note 7)                    16,548      14,203      12,164
      Research and development expenses       8,682       7,498       7,111
      Write-off of acquired technology
        (Note 3)                                  -       4,909           -
                                            -------     -------     -------

                                             52,373      53,742      41,730
                                            -------     -------     -------

    Operating Income                         10,461      10,220      11,150

    Interest Income                           6,476       5,297       5,117
    Interest Expense (Note 6)                (2,244)        (80)       (274)
    Gain on Sale of Investments, Net
      (Note 2)                                    5         919         421
                                            -------     -------     -------

    Income Before Provision for Income
      Taxes                                  14,698      16,356      16,414
    Provision for Income Taxes (Note 5)       5,679       6,326       5,279
                                            -------     -------     -------

    Net Income                              $ 9,019     $10,030     $11,135
                                            =======     =======     =======

    Earnings per Share (Note 12):
      Basic                                 $   .23     $   .25     $   .29
                                            =======     =======     =======
      Diluted                               $   .23     $    25     $   .27
                                            =======     =======     =======
    Weighted Average Shares (Note 12):
      Basic                                  39,482      39,924      38,358
                                            =======     =======     =======
      Diluted                                39,765      40,929      40,650
                                            =======     =======     =======


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











                                        2
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Consolidated Balance Sheet

    (In thousands)                                          1997        1996
    ------------------------------------------------------------------------

    Assets
    Current Assets:
      Cash and cash equivalents                         $ 71,158    $  1,157
      Short-term available-for-sale investments,
        at quoted market value (amortized cost of
        $45,443 and $46,511; Note 2)                      45,589      46,455
      Accounts receivable, less allowances of $833
        and $736                                          11,377      13,490
      Inventories                                         14,519      13,870
      Prepaid and refundable income taxes (Note 5)         3,962       4,202
      Prepaid expenses and other current assets              342          43
                                                        --------    --------

                                                         146,947      79,217
                                                        --------    --------

    Property, Plant, and Equipment, at Cost, Net           8,481       8,500
                                                        --------    --------

    Long-term Available-for-sale Investments,
      at Quoted Market Value (amortized cost
      of $12,655 and $33,929; Note 2)                     12,665      33,920
                                                        --------    --------

    Prepaid Income Taxes (Note 5)                          2,749       2,704
                                                        --------    --------

    Other Assets                                           2,366         637
                                                        --------    --------

                                                        $173,208    $124,978
                                                        ========    ========

























                                        3
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                     Consolidated Balance Sheet (continued)

    (In thousands except share amounts)                    1997         1996
    ------------------------------------------------------------------------

    Liabilities and Shareholders' Investment
    Current Liabilities:
      Current maturity of subordinated convertible
        obligations (Note 6)                          $      -      $  3,755
      Accounts payable                                   2,291         3,502
      Accrued payroll and employee benefits              2,749         2,675
      Accrued warranty expenses                          1,100           770
      Accrued income taxes                                 912           102
      Other accrued expenses                             2,885         3,018
      Due to parent company and Thermo Electron
        Corporation                                        308            67
                                                      --------      --------

                                                        10,245        13,889
                                                      --------      --------

    Subordinated Convertible Debentures (Note 6)        70,000             -
                                                      --------      --------

    Commitments and Contingency (Notes 7 and 8)

    Shareholders' Investment (Notes 4 and 9):
      Common stock, $.10 par value, 100,000,000
        shares authorized; 40,520,521 and 40,227,962
        shares issued                                    4,052         4,023
      Capital in excess of par value                    98,252        93,234
      Retained earnings                                 32,096        22,727
      Treasury stock at cost, 1,502,474 and 235,509 
        shares                                         (41,563)       (8,854)
      Cumulative translation adjustment                     26             -
      Net unrealized gain (loss) on available-for-sale
        investments (Note 2)                               100           (41)
                                                      --------      --------

                                                        92,963       111,089
                                                      --------      --------

                                                      $173,208      $124,978
                                                      ========      ========


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













                                        4
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                      Consolidated Statement of Cash Flows

    (In thousands)                               1997       1996        1995
    ------------------------------------------------------------------------

    Operating Activities:
      Net income                            $  9,019    $ 10,030    $ 11,135
      Adjustments to reconcile net income
        to net cash provided by operating
        activities:
          Write-off of acquired technology
            (Note 3)                               -       4,909           -
          Depreciation and amortization        2,571       2,182       2,013
          Provision for losses on accounts
            receivable                           120         165         120
          Gain on sale of investments, net
            (Note 2)                              (5)       (919)       (421)
          Deferred income tax benefit           (170)     (1,838)     (1,775)
          Other noncash items                    (13)         60          36
          Changes in current accounts,
            excluding the effects of
            acquisition:
              Accounts receivable              1,987      (4,017)     (1,045)
              Inventories                       (658)     (3,976)     (3,513)
              Other current assets               (14)        899        (737)
              Accounts payable                (1,210)        458       1,045
              Other current liabilities        2,396       2,586       2,316
                                            --------    --------    --------

    Net cash provided by operating
      activities                              14,023      10,539       9,174
                                            --------    --------    --------

    Investing Activities:
      Acquisition (Note 3)                         -      (5,013)          -
      Proceeds from sale and maturities
        of available-for-sale investments    103,390      89,615      84,782
      Purchases of available-for-sale
        investments                          (81,043)    (83,947)    (92,707)
      Purchases of property, plant, and
        equipment                             (2,333)     (2,570)     (3,347)
      Proceeds from sale of property,
        plant, and equipment                     107           -           -
      Other                                      (70)       (134)       (218)
                                            --------    --------    --------

    Net cash provided by (used in)
      investing activities                  $ 20,051    $ (2,049)   $(11,490)
                                            --------    --------    --------











                                        5
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                Consolidated Statement of Cash Flows (continued)

    (In thousands)                               1997       1996        1995
    ------------------------------------------------------------------------

    Financing Activities:
      Net proceeds from issuance of 
        subordinated convertible 
        debentures (Note 6)                 $ 68,028    $      -    $      -
      Purchases of Company common stock      (32,957)     (5,665)          -
      Net proceeds from issuance of Company
        common stock                             602         741         947
      Payment of withholding taxes related
        to stock option exercises               (138)     (1,283)     (1,500)
      International Technidyne transfers of
        cash (to) from Thermo Electron           350      (5,567)     (2,158)
                                            --------    --------    --------

    Net cash provided by (used in)
      financing activities                    35,885     (11,774)     (2,711)
                                            --------    --------    --------

    Exchange Rate Effect on Cash                  42           -           -
                                            --------    --------    --------

    Increase (Decrease) in Cash and Cash
      Equivalents                             70,001      (3,284)     (5,027)
    Cash and Cash Equivalents at Beginning
      of Year                                  1,157       4,441       9,468
                                            --------    --------    --------

    Cash and Cash Equivalents at End of Year$ 71,158    $  1,157    $  4,441
                                            ========    ========    ========

    Cash Paid For:
      Interest                              $  1,672    $      -    $     29
      Income taxes                          $  2,961    $  2,260    $  3,191

    Noncash Activities (Note 3):
      Fair value of assets of acquired
        company                             $      -    $  5,068    $      -
      Cash paid for acquired company               -      (5,013)          -
                                            --------    --------    --------

        Liabilities assumed of acquired
          company                           $      -    $     55    $      -
                                            ========    ========    ========

      Conversions of subordinated
        obligations (Note 6)                $  3,755    $  7,887    $ 21,808
                                            ========    ========    ========


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






                                        6
<PAGE>



    Thermo Cardiosystems Inc.                       1997 Financial Statements

               Consolidated Statement of Shareholders' Investment

    (In thousands)                               1997       1996        1995
    ------------------------------------------------------------------------

    Common Stock, $.10 Par Value
      Balance at beginning of year          $  4,023    $  2,636    $  2,511
      Issuance of stock under employees'
        and directors' stock plans                 3           9          22
      Conversions of subordinated
        convertible obligations (Note 6)          26          54         103
      Effect of three-for-two stock split          -       1,324           -
                                            --------    --------    --------
      Balance at end of year                   4,052       4,023       2,636
                                            --------    --------    --------

    Capital in Excess of Par Value
      Balance at beginning of year            93,234      84,125      58,862
      Issuance of stock under employees'
        and directors' stock plans               211         452         522
      Tax benefit related to employees'
        and directors' stock plans             1,078       2,190       3,335
      Conversions of subordinated
        convertible obligations (Note 6)       3,729       7,791      21,406
      Effect of three-for-two stock split          -      (1,324)          -
                                            --------    --------    --------
      Balance at end of year                  98,252      93,234      84,125
                                            --------    --------    --------
                                                 

    Retained Earnings
      Balance at beginning of year            22,727      18,264       9,287
      Net income                               9,019      10,030      11,135
      International Technidyne Transfer of
        cash (to) from Thermo Electron           350      (5,567)     (2,158)
                                            --------    --------    --------

      Balance at end of year                  32,096      22,727      18,264
                                            --------    --------    --------
                                                 
    Treasury Stock
      Balance at beginning of year            (8,854)     (2,186)     (1,089)
      Activity under employees' and
        directors' stock plans                   248      (1,003)     (1,097)
      Purchases of Company common stock      (32,957)     (5,665)          -
                                            --------    --------    --------

      Balance at end of year                 (41,563)     (8,854)     (2,186)
                                            --------    --------    --------
                                                   
    Cumulative Translation Adjustment
      Balance at beginning of year                 -           -           -
      Translation adjustment                      26           -           -
                                            --------    --------    --------

      Balance at end of year                      26           -           -
                                            --------    --------    --------

    Net Unrealized Gain (Loss) on Available-
      for-sale Investments
      Balance at beginning of year               (41)        577      (1,189)
      Change in net unrealized gain (loss)
        on available-for-sale investments
        (Note 2)                                 141        (618)      1,766
                                            --------    --------    --------
      Balance at end of year                     100         (41)        577
                                            --------    --------    --------
                                                 

    Total Shareholders' Investment          $ 92,963    $111,089    $103,416
                                            ========    ========    ========
    The accompanying notes are an integral part of these consolidated
    financial statements.

                                        7
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies

    Nature of Operations
        Thermo Cardiosystems Inc. (the Company) is a leader in the research,
    development, and manufacture of implantable left ventricular-assist
    systems (LVAS). Its HeartMate(R) devices are designed to perform
    substantially all or part of the pumping function of the left ventricle
    of the natural heart for patients suffering from cardiovascular disease.
    The Company's International Technidyne Corporation subsidiary is a
    leading manufacturer of near-patient, whole-blood coagulation testing
    equipment and related disposables. International Technidyne also
    manufactures premium-quality, single-use skin-incision devices. The
    Company's Nimbus Medical Inc. subsidiary is involved in the research and
    development of ventricular devices and total artificial hearts.

    Relationship with Thermedics Inc. and Thermo Electron Corporation
        The Company was incorporated in 1988 as a wholly owned subsidiary of
    Thermedics Inc. Prior to that time, the business was conducted as a
    division of Thermedics. Thermedics is a 58%-owned subsidiary of Thermo
    Electron Corporation. As of January 3, 1998, Thermedics and Thermo
    Electron owned a total of 23,206,320 shares of the Company's common
    stock, representing 59% of such stock outstanding, including 3,355,705
    shares issuable to Thermo Electron for the acquisition of International
    Technidyne (Note 3). 

    Principles of Consolidation
        The accompanying financial statements include the accounts of the
    Company and its wholly owned subsidiaries. All material intercompany
    accounts and transactions have been eliminated.

    Fiscal Year
        The Company has adopted a fiscal year ending the Saturday nearest
    December 31. References to 1997, 1996, and 1995 are for the fiscal years
    ended January 3, 1998, December 28, 1996, and December 30, 1995,
    respectively. Fiscal year 1997 included 53 weeks; 1996 and 1995 each
    included 52 weeks.

    Revenue Recognition
        The Company recognizes the majority of its revenues upon shipment of
    its products. The Company provides a reserve for its estimate of warranty
    costs at the time of shipment. Revenues and profits on long-term research
    and development contracts are recognized using the
    percentage-of-completion method. Revenues recorded under the
    percentage-of-completion method were $1,991,000 in 1997. The
    percentage-of-completion is determined by relating the actual costs
    incurred to date to management's estimate of total costs to be incurred
    on each contract. If a loss is indicated on any contract in process, a
    provision is made currently for the entire loss. Contracts generally
    provide for the billing of customers in a cost-plus-fixed-fee basis as
    costs are incurred.



                                        8
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Stock-based Compensation Plans
        The Company applies Accounting Principles Board Opinion (APB) No. 25,
    "Accounting for Stock Issued to Employees," and related interpretations
    in accounting for its stock-based compensation plans (Note 4).
    Accordingly, no accounting recognition is given to stock options granted
    at fair market value until they are exercised. Upon exercise, net
    proceeds, including tax benefits realized, are credited to equity.

    Income Taxes
        In accordance with Statement of Financial Accounting Standards (SFAS)
    No. 109, "Accounting for Income Taxes," the Company recognizes deferred
    income taxes based on the expected future tax consequences of differences
    between the financial statement basis and the tax basis of assets and
    liabilities, calculated using enacted tax rates in effect for the year in
    which the differences are expected to be reflected in the tax return.
   
    Earnings per Share
        During the fourth quarter of 1997, the Company adopted SFAS No. 128,
    "Earnings per Share" (Note 12). As a result, all previously reported
    earnings per share have been restated and the Company is required to
    report diluted earnings per share; however, diluted earnings per share
    equals the Company's previously reported earnings per share for 1996 and
    1995. Basic earnings per share have been computed by dividing net income
    by the weighted average number of shares outstanding during the year.
    Diluted earnings per share have been computed assuming the conversion of
    convertible obligations and the elimination of the related interest
    expense, and the exercise of stock options, as well as their related
    income tax effects.

    Cash and Cash Equivalents
        At year-end 1997 and 1996, $70,488,000 and $1,018,000, respectively,
    of the Company's cash equivalents were invested in a repurchase agreement
    with Thermo Electron. Under this agreement, the Company in effect lends
    excess cash to Thermo Electron, which Thermo Electron collateralizes with
    investments principally consisting of corporate notes, commercial paper,
    U.S. government-agency securities, money market funds, and other
    marketable securities, in the amount of at least 103% of such obligation.
    The Company's funds subject to the repurchase agreement are readily
    convertible into cash by the Company. The repurchase agreement earns a
    rate based on the 90-day Commercial Paper Composite Rate plus 25 basis
    points, set at the beginning of each quarter. At year-end 1997 and 1996,
    the Company's cash equivalents also include investments in commercial
    paper and short-term certificates of deposit of the Company's foreign
    operations which have an original maturity of three months or less. Cash
    equivalents are carried at cost, which approximates market value.






                                        9
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Inventories
        Inventories are stated at the lower of cost (on a first-in, first-out
    basis) or market value and include materials, labor, and manufacturing
    overhead. The components of inventories are as follows:

    (In thousands)                                           1997      1996
    -----------------------------------------------------------------------
    Raw materials                                         $ 3,420   $ 9,111
    Work in process                                         8,381     3,043
    Finished goods                                          2,718     1,716
                                                          -------   -------

                                                          $14,519   $13,870
                                                          =======   =======

    Property, Plant, and Equipment
        The costs of additions and improvements are capitalized, while
    maintenance and repairs are charged to expense as incurred. The Company
    provides for depreciation and amortization using the straight-line method
    over the estimated useful lives of the property, as follows: buildings,
    15 and 31.5 years; machinery and equipment, three to ten years, and
    leasehold improvements, the shorter of the term of the lease or the life
    of the asset. Property, plant, and equipment consists of the following:


    (In thousands)                                           1997      1996
    -----------------------------------------------------------------------

    Land                                                  $   341   $   341
    Buildings                                               2,445     2,445
    Machinery, equipment, and leasehold improvements       15,075    13,048
                                                          -------   -------

                                                           17,861    15,834

    Less: Accumulated depreciation and amortization         9,380     7,334
                                                          -------   -------

                                                          $ 8,481   $ 8,500
                                                          =======   =======

    Other Assets
        Other assets in the accompanying consolidated balance sheet include
    the cost of acquired patents and trademarks and in 1997 deferred debt
    expense relating to the Company's issuance of subordinated convertible
    debentures. These assets are being amortized using the straight-line
    method over their estimated useful lives, which range from 7 to 40 years.
    These assets were $2,145,000 and $331,000, net of accumulated
    amortization of $358,000 and $130,000, at year-end 1997 and 1996,
    respectively.





                                       10
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    1.  Nature of Operations and Summary of Significant Accounting Policies
        (continued)

    Stock Split
        All share and per share information was restated in 1996 to reflect a
    three-for-two stock split effected in the form of a 50% stock dividend,
    distributed in May 1996.

    Foreign Currency
        All assets and liabilities of the Company's foreign subsidiary are
    translated at year-end exchange rates, and revenues and expenses are
    translated at average exchange rates for the year in accordance with SFAS
    No. 52, "Foreign Currency Translation." Resulting translation adjustments
    are reflected as a separate component of shareholders' investment titled
    "Cumulative translation adjustment." Foreign currency transaction gains
    and losses are included in the accompanying statement of income and are
    not material for each of the three years presented.

    Use of Estimates
        The preparation of financial statements in conformity with generally
    accepted accounting principles requires management to make estimates and
    assumptions that affect the reported amounts of assets and liabilities,
    disclosure of contingent assets and liabilities at the date of the
    financial statements, and the reported amounts of revenues and expenses
    during the reporting period. Actual results could differ from those
    estimates.

    Presentation
        The historical information for all periods presented has been
    restated to reflect the May 2, 1997, acquisition of International
    Technidyne, which has been accounted for at historical cost in a manner
    similar to a pooling of interests (Note 3).

    2.  Available-for-sale Investments

        In accordance with SFAS No. 115, "Accounting for Certain Investments
    in Debt and Equity Securities," the Company's debt securities are
    considered available-for-sale investments in the accompanying balance
    sheet and are carried at market value, with the difference between cost
    and market value, net of related tax effects, recorded currently as a
    component of shareholders' investment titled "Net unrealized gain (loss)
    on available-for-sale investments." 












                                       11
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    2.  Available-for-sale Investments (continued)

        The aggregate market value, cost basis, and gross unrealized gains
    and losses of short- and long-term available-for-sale investments by
    major security type are as follows:

                                                         Gross        Gross
                             Market         Cost    Unrealized   Unrealized
    (In thousands)            Value        Basis         Gains       Losses
    -----------------------------------------------------------------------
    1997

    Government-agency
      securities            $55,391      $55,334      $    66      $    (9)
    Corporate bonds           1,001        1,000            1            -
    Other                     1,862        1,764          172          (74)
                            -------      -------      -------      -------

                            $58,254      $58,098      $   239      $   (83)
                            =======      =======      =======      =======
    1996

    Government-agency
      securities            $76,901      $76,917      $     -      $   (16)
    Corporate bonds           1,014        1,006            8            -
    Other                     2,460        2,517            -          (57)
                            -------      -------      -------      -------

                            $80,375      $80,440      $     8      $   (73)
                            =======      =======      =======      =======

        Short- and long-term available-for-sale investments in the
    accompanying 1997 balance sheet include $45,589,000 with contractual
    maturities of one year or less, and $12,665,000 with contractual
    maturities of more than one year through five years. Actual maturities
    may differ from contractual maturities as a result of the Company's
    intent to sell these securities prior to maturity and as a result of put
    and call options that enable either the Company, the issuer, or both to
    redeem these securities at an earlier date.
        The cost of available-for-sale investments that were sold was based
    on specific identification in determining realized gains recorded in the
    accompanying statement of income. Gain on sale of investments, net,
    resulted from gross realized gains of $5,000 in 1997, and gross realized
    gains of $1,040,000 and $439,000 and gross realized losses of $121,000
    and $18,000 in 1996 and 1995, respectively, relating to the sale of
    available-for-sale investments.

    3.  Acquisitions

        On May 2, 1997, the Company acquired International Technidyne from
    Thermo Electron in exchange for the right to receive 3,355,705 shares of
    the Company's common stock. International Technidyne is a leading
    manufacturer of near-patient, whole-blood coagulation testing equipment
    and related disposables and also manufactures premium-quality,
    single-use skin-incision devices.

                                       12
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    3.  Acquisitions (continued)

        Because the Company and International Technidyne were deemed for
    accounting purposes to be under control of their common majority owner,
    Thermo Electron, the transaction has been accounted for at historical
    cost in a manner similar to a pooling of interests. Accordingly, all
    historical financial information presented has been restated to include
    the acquisition of International Technidyne. The 3,355,705 shares of the
    Company's common stock issuable in connection with the acquisition will
    not be issued until the listing of such shares for trading upon the
    American Stock Exchange has been approved by the Company's shareholders.
    Because Thermedics is the majority shareholder, is controlled by Thermo
    Electron, and intends to vote its shares in favor of such listing, the
    approval is assured and, therefore, the shares are considered to be
    outstanding and the results of International Technidyne are included for
    all periods presented.
        Revenues and net income, as previously reported by the separate
    entities prior to the acquisition and as restated for the combined
    Company, are as follows:

    (In thousands)                                           1996      1995
    -----------------------------------------------------------------------

    Revenues:
      Historical                                          $29,970   $20,593
      International Technidyne                             33,992    32,287
                                                          -------   -------

                                                          $63,962   $52,880
                                                          =======   =======

    Net income:
      Historical                                          $ 5,358   $ 6,925
      International Technidyne                              4,672     4,210
                                                          -------   -------

                                                          $10,030   $11,135
                                                          =======   =======

        In December 1996, the Company acquired substantially all of the
    assets, subject to certain liabilities, of Nimbus Medical, Inc., a
    research and development organization specializing in ventricular-assist
    devices and total artificial hearts, for $5,013,000 in cash. Nimbus is
    engaged strictly in research and development activities and, through its
    acquisition date, had not completed development of any commercial
    products for which it retains ownership rights. Nimbus' assets acquired
    by the Company included certain technology in development. The
    feasibility of the technology in development had not been conclusively
    established at the acquisition date and such technology had no future use
    other than in potential future generations of heart-assist devices or in
    total artificial hearts. In connection with the acquisition of Nimbus,
    the Company wrote off $4,909,000, which represents the portion of the
    purchase price allocated to technology in development based on estimated
    replacement cost.


                                       13
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    3.  Acquisitions (continued)

        This acquisition has been accounted for using the purchase method of
    accounting and its results of operations have been included in the
    accompanying financial statements from the date of acquisition. Pro forma
    data is not presented since this acquisition was not material to the
    Company's results of operations.

    4.  Employee Benefit Plans

    Stock-based Compensation Plans

    Stock Option Plans
    ------------------
        The Company has stock-based compensation plans for its key employees,
    directors, and others. Two of these plans, adopted in 1988, permit the
    grant of nonqualified and incentive stock options. A third plan, adopted
    in 1994, permits the grant of a variety of stock and stock-based awards
    as determined by the human resources committee of the Company's Board of
    Directors (the Board Committee), including restricted stock, stock
    options, stock bonus shares, or performance-based shares. To date, only
    nonqualified stock options have been awarded under this plan. The option
    recipients and the terms of options granted under these plans are
    determined by the Board Committee. Generally, options granted to date are
    exercisable immediately, but are subject to certain transfer restrictions
    and the right of the Company to repurchase shares issued upon exercise of
    the options at the exercise price, upon certain events. The restrictions
    and repurchase rights generally lapse ratably over a five- to ten-year
    period, depending on the term of the option, which may range from seven
    to twelve years. Nonqualified options may be granted at any price
    determined by the Board Committee, although incentive stock options must
    be granted at not less than the fair market value of the Company's stock
    on the date of grant. To date, all options have been granted at fair
    market value. The Company also has a directors' stock option plan,
    adopted in 1991, that provides for the grant of stock options to outside
    directors pursuant to a formula approved by the Company's shareholders.
    Options awarded under this plan are exercisable six months after the date
    of grant and expire three or seven years after the date of grant. In
    addition to the Company's stock-based compensation plans, certain
    officers and key employees may also participate in the stock-based
    compensation plans of Thermedics and Thermo Electron.













                                       14
<PAGE>




   Thermo Cardiosystems Inc.                         1997 Financial Statements

                   Notes to Consolidated Financial Statements

   4.  Employee Benefit Plans (continued)

       A summary of the Company's stock option activity is as follows:

                              1997              1996              1995
                        ----------------  ----------------  ----------------
                                Weighted          Weighted          Weighted
                        Number   Average  Number   Average  Number   Average
   (Shares in               of  Exercise      of  Exercise      of  Exercise
   thousands)           Shares     Price  Shares     Price  Shares     Price
   -------------------------------------------------------------------------

   Options outstanding,
     beginning of year  1,130    $14.59    1,137    $ 9.84  1,458     $ 6.05

       Granted            783     27.22      189     32.90    121      28.34

       Exercised         (119)     4.95     (179)     3.67   (429)      2.13

       Forfeited         (148)    24.42      (17)    15.55    (13)     11.03
                        -----              -----            -----

   Options outstanding,
     end of year        1,646    $20.41    1,130    $14.59  1,137     $ 9.84
                        =====    ======    =====    ======  =====     ======

   Options exercisable  1,646    $20.41    1,130    $14.59  1,137     $ 9.84
                        =====    ======    =====    ======  =====     ======
   Options available
     for grant            318                453              625
                        =====              =====            =====

       A summary of the status of the Company's stock options at January 3,
   1998, is as follows:

                                       Options Outstanding and Exercisable
                                       -----------------------------------
                                                                  Weighted
                                        Number  Weighted Average   Average
                                            of         Remaining  Exercise
   Range of Exercise Prices             Shares  Contractual Life     Price
   -----------------------------------------------------------------------

   (Shares in thousands)

   $ 1.15 - $13.10                        651         4.9 years     $ 8.86
    13.11 -  25.06                        112         8.4 years      23.35
    25.07 -  37.01                        842         8.6 years      27.82
    37.02 -  48.97                         41         4.4 years      43.56
                                        -----

   $ 1.15 - $48.97                      1,646         7.0 years     $20.41
                                        =====






                                       15
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    4.  Employee Benefit Plans (continued)

    Employee Stock Purchase Program
    -------------------------------
        Substantially all of the Company's full-time employees are eligible
    to participate in an employee stock purchase program sponsored by the
    Company and Thermo Electron. Under this program, shares of the Company's
    and Thermo Electron's common stock can be purchased at the end of a
    12-month period at 95% of the fair market value at the beginning of the
    period, and the shares purchased are subject to a six-month resale
    restriction. Prior to November 1, 1995, the applicable shares of common
    stock could be purchased at 85% of the fair market value at the beginning
    of the period, and the shares purchased were subject to a one-year resale
    restriction. Shares are purchased through payroll deductions of up to 10%
    of each participating employee's gross wages. During 1997, 1996, and
    1995, the Company issued 435 shares, 3,469 shares, and 7,881 shares,
    respectively, of its common stock under this program.

    Pro Forma Stock-based Compensation Expense
        In October 1995, the Financial Accounting Standards Board issued SFAS
    No. 123, "Accounting for Stock-based Compensation," which sets forth a
    fair-value based method of recognizing stock-based compensation expense.
    As permitted by SFAS No. 123, the Company has elected to continue to
    apply APB No. 25 to account for its stock-based compensation plans. Had
    compensation cost for awards in 1997, 1996, and 1995 under the Company's
    stock-based compensation plans been determined based on the fair value at
    the grant dates consistent with the method set forth under SFAS No. 123,
    the effect on the Company's net income and earnings per share would have
    been as follows:

    (In thousands except per share amounts)        1997      1996      1995
    -----------------------------------------------------------------------

    Net income:
      As reported                               $ 9,019   $10,030   $11,135
      Pro forma                                   7,658     9,495    11,005
    Basic earnings per share:
      As reported                                   .23       .25       .29
      Pro forma                                     .19       .24       .29
    Diluted earnings per share:
      As reported                                   .23       .25       .27
      Pro forma                                     .19       .23       .27

        Because the method prescribed by SFAS No. 123 has not been applied to
    options granted prior to January 1, 1995, the resulting pro forma
    compensation expense may not be representative of the amount to be
    expected in future years. Compensation expense for options granted is
    reflected over the vesting period; therefore, future pro forma
    compensation expense may be greater as additional options are granted.






                                       16
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    4.  Employee Benefit Plans (continued)

        The weighted average fair value per share of options granted was
    $15.92, $18.23, and $14.02 in 1997, 1996, and 1995, respectively. The
    fair value of each option grant was estimated on the grant date using the
    Black-Scholes option-pricing model with the following weighted-average
    assumptions:

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

    Volatility                                   51%        50%         50%
    Risk-free interest rate                     6.4%       6.2%        6.0%
    Expected life of options               6.6 years  6.6 years   4.7 years

        The Black-Scholes option-pricing model was developed for use in
    estimating the fair value of traded options which have no vesting
    restrictions and are fully transferable. In addition, option-pricing
    models require the input of highly subjective assumptions including
    expected stock price volatility. Because the Company's employee stock
    options have characteristics significantly different from those of traded
    options, and because changes in the subjective input assumptions can
    materially affect the fair value estimate, in management's opinion, the
    existing models do not necessarily provide a reliable single measure of
    the fair value of its employee stock options.

    401(k) Savings Plan
        Substantially all of the Company's full-time employees are eligible
    to participate in Thermo Electron's 401(k) savings plan. Contributions to
    the plan are made by both the employee and the Company. Company
    contributions are based upon the level of employee contributions. For
    this plan, the Company contributed and charged to expense $410,000,
    $459,000, and $413,000 in 1997, 1996, and 1995, respectively.

    5.  Income Taxes

        The components of income before provision for income taxes are as
    follows:

    (In thousands)                              1997       1996        1995
    -----------------------------------------------------------------------

    Domestic                                $14,808     $16,081     $16,414
    Foreign                                    (110)        275           -
                                            -------     -------     -------

                                            $14,698     $16,356     $16,414
                                            =======     =======     =======









                                       17
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    5.  Income Taxes (continued)

        The components of the provision for income taxes are as follows:

    (In thousands)                              1997       1996        1995
    -----------------------------------------------------------------------

    Currently payable:
      Federal                                $ 4,838    $ 7,440     $ 6,333
      State                                    1,011        724         721
                                             -------    -------     -------

                                               5,849      8,164       7,054
                                             -------    -------     -------

    Net deferred (prepaid):
      Federal                                   (136)    (2,115)     (1,697)
      State                                      (34)       277         (78)
                                             -------    -------     -------

                                                (170)    (1,838)     (1,775)
                                             -------    -------     -------

                                             $ 5,679    $ 6,326     $ 5,279
                                             =======    =======     =======

        The Company receives a tax deduction upon exercise of nonqualified
    stock options by employees for the difference between the exercise price
    and the market price of the Company's common stock on the date of
    exercise. The provision for income taxes that is currently payable does
    not reflect $1,078,000, $2,190,000, and $3,335,000 of such benefits that
    have been allocated to capital in excess of par value in 1997, 1996, and
    1995, respectively.
        The provision for income taxes in the accompanying statement of
    income differs from the provision calculated by applying the statutory
    federal income tax rate of 35% in 1997 and 34% in 1996 and 1995 to income
    before provision for income taxes due to the following:

    (In thousands)                              1997       1996        1995
    -----------------------------------------------------------------------
                                     

    Provision for income taxes at statutory
      rate                                  $ 5,144     $ 5,561     $ 5,581
    Increases (decreases) resulting from:
      State income taxes, net of federal tax    635         660         424
      Foreign sales corporation benefit        (160)       (111)       (103)
      Reversal of valuation allowance             -           -        (725)
      Other                                      60         216         102
                                            -------     -------     -------

                                            $ 5,679     $ 6,326     $ 5,279
                                            =======     =======     =======

        The Company's valuation allowance was reversed in 1995 as a result of
    reduced uncertainty surrounding the realization of future tax benefits.
    The portion of the reduction in the valuation allowance that related to
    stock options was recorded as an increase to capital in excess of par
    value.



                                       18
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    5.  Income Taxes (continued)
        Short- and long-term prepaid income taxes in the accompanying balance
    sheet consist of the following:

    (In thousands)                                          1997      1996
    ----------------------------------------------------------------------
    Prepaid income taxes:
      Inventory basis difference                          $1,334    $1,314
      State tax loss and credit carryforwards                612       434
      Available-for-sale investments                         (56)       23
      Depreciation and amortization                          971       958
      Accrued compensation                                   580       277
      Allowance for doubtful accounts                        211       189
      Reserves and accruals                                1,097     1,136
      Write-off of acquired technology (Note 3)            1,834     1,865
      Other, net                                             128       381
                                                          ------    ------

                                                          $6,711    $6,577
                                                          ======    ======

        The Company has available $6,300,000 of state net operating loss
    carryforwards which expire from 1998 through 2002 and $100,000 of state
    tax credit carryforwards which expire from 2000 through 2012.

    6.  Subordinated Convertible Debentures

        In May 1997, the Company issued and sold at par $70,000,000 principal
    amount of 4 3/4% subordinated convertible debentures due 2004, for net
    proceeds of $68,028,000. The debentures are convertible into shares of
    the Company's common stock at a conversion price of $31.415 per share.
        In January 1994, the Company issued and sold at par value $33,000,000
    principal amount of noninterest-bearing subordinated convertible
    debentures due January 1997. During 1997, 1996, and 1995, $3,755,000,
    $7,887,000, and $21,358,000, respectively, of principal amount of these
    subordinated convertible debentures and, in 1995, $450,000 principal
    amount of the Company's 5 1/2% subordinated convertible notes were
    converted into 259,078 shares, 544,168 shares, and 1,541,976 shares,
    respectively, of the Company's common stock.
        The Company's convertible debentures are guaranteed on a subordinated
    basis by Thermo Electron. Thermedics has agreed to reimburse Thermo
    Electron in the event Thermo Electron is required to make a payment under
    the guarantee.
        See Note 10 for the fair value information pertaining to the
    Company's subordinated convertible debentures.

    7.  Related-party Transactions

    Corporate Services Agreement
        The Company and Thermo Electron have a corporate services agreement
    under which Thermo Electron's corporate staff provides certain
    administrative services, including certain legal advice and services,
    risk management, certain employee benefit administration, tax advice and
    preparation of tax returns, centralized cash management, and certain
    financial and other services, for which the Company paid Thermo Electron
    annually an amount equal to 1.0% of the Company's revenues in 1997 and


                                       19
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    7.  Related-party Transactions (continued)

    1996 and 1.20% of the Company's revenues in 1995. Beginning in fiscal
    1998, the Company will pay an annual fee equal to 0.8% of the Company's
    revenues. The annual fee is reviewed and adjusted annually by mutual
    agreement of the parties. In addition, the Company uses data processing
    services of a majority-owned subsidiary of Thermo Electron, and
    accounting, personnel, and administrative services of Thermedics. For
    these services, as well as the administrative services provided by Thermo
    Electron, the Company was charged $963,000, $958,000, and $865,000 in
    1997, 1996, and 1995, respectively. The corporate services agreement is
    renewed annually but can be terminated upon 30 days' prior notice by the
    Company or upon the Company's withdrawal from the Thermo Electron
    Corporate Charter (the Thermo Electron Corporate Charter defines the
    relationship among Thermo Electron and its majority-owned subsidiaries).
    Management believes that the service fees charged by Thermo Electron, its
    majority-owned subsidiary, and Thermedics are reasonable and that such
    fees are representative of the expenses the Company would have incurred
    on a stand-alone basis. For additional items such as employee benefit
    plans, insurance coverage, and other identifiable costs, Thermo Electron
    charges the Company based upon costs attributable to the Company.

    Operating Leases
        The Company subleases office and research facilities from Thermedics
    and is charged for actual square footage occupied at approximately the
    same rent paid per square foot by Thermedics under its prime lease. The
    sublease expires in February 1999. The accompanying statement of income
    includes expenses from the sublease of $170,000, $116,000, and $134,000
    in 1997, 1996, and 1995, respectively. Currently, the cost of the area
    occupied by the Company is $170,000 per year.
        In 1997, the Company subleased approximately 8,000 square feet of
    office and research facilities from Thermedics Detection Inc., a publicly
    traded majority-owned subsidiary of Thermedics, under a two-year sublease
    agreement. Under this sublease, the Company will pay Thermedics Detection
    base rent of $40,000 in the first year and $44,000 in the second year, as
    well as approximately $33,000 per year, representing the Company's pro
    rata allocation of the facility's aggregate operating costs, real estate
    taxes, and utilities. The accompanying statement of income includes
    expenses from this sublease agreement of $73,000 in 1997.
        The Company leases office space on a month-to-month basis from an
    affiliate which is controlled by Thermo Electron. The accompanying
    statement of income includes expenses from this lease of $9,000, $8,000,
    and $17,000 in 1997, 1996, and 1995, respectively.

    Repurchase Agreement
        The Company invests excess cash in a repurchase agreement with Thermo
    Electron as discussed in Note 1.







                                       20
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    8.  Commitment and Contingency

    Operating Lease
        In addition to the related-party operating leases described in Note
    7, the Company leases manufacturing, office, and research facilities
    under two operating lease agreements expiring in 1999 and 2000. The
    accompanying statement of income includes expense from these leases of
    $551,000, $188,000, and $13,000 in 1997, 1996, and 1995, respectively.
    Future minimum payments due under these leases at January 3, 1998, are
    $331,000 in 1998; $236,000 in 1999; $124,000 in 2000; $116,000 in 2001;
    and $117,000 in 2002. Total future minimum lease payments are $924,000.

    Contingency
        The Company has received correspondence alleging that the textured
    surface of the LVAS housing infringed the intellectual property rights of
    another party. In general, an owner of intellectual property can prevent
    others from using such property without a license and is entitled to
    damages for unauthorized past usage. The Company has investigated the
    bases of the allegation and, based on the opinion of its counsel and the
    Company's assessment of the proceedings in the United States Patent and
    Trademark Office to date, believes that if the Company were sued on these
    bases, it would have meritorious defenses. Given the inherent
    uncertainties in dispute resolution, however, if the Company were sued
    and the outcome were unfavorable, the Company's results of operations or
    financial condition could be materially adversely affected in amounts the
    Company cannot reasonably estimate.

    9.  Stock Purchase Warrant and Common Stock

        In May 1993, in connection with an agreement to develop a material to
    be used in the Company's LVAS, the Company granted to a third party the
    right to purchase from the Company 60,000 shares of the Company's common
    stock at a price of $5.83 per share, which was the fair market value of
    the Company's common stock on the date of grant. This warrant is
    exercisable immediately and expires ten years after the date of grant.
        At January 3, 1998, the Company had reserved 4,511,098 unissued
    shares of its common stock for possible issuance under stock-based
    compensation plans, possible conversion of its outstanding subordinated
    convertible obligations, and possible issuance under the stock purchase
    warrant.

    10. Fair Value of Financial Instruments 

        The Company's financial instruments consist mainly of cash and cash
    equivalents, available-for-sale investments, accounts receivable,
    accounts payable, due to parent company and Thermo Electron Corporation,
    and subordinated convertible debentures. The carrying amounts of these
    financial instruments, with the exception of subordinated convertible
    obligations, approximates fair value due to their short-term nature.
        Available-for-sale investments are carried at fair value in the
    accompanying balance sheet. The fair values were determined based on
    quoted market prices. See Note 2 for fair value information pertaining to
    these financial instruments.


                                       21
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    10. Fair Value of Financial Instruments (continued)

        The fair value of the Company's subordinated convertible debentures
    was determined based on quoted market prices. The carrying amount and
    fair value of the Company's subordinated convertible debentures were
    $70,000,000 and $74,900,000 in 1997, respectively, and $3,755,000 and
    $7,435,000 in 1996, respectively.

    11. Significant Customer, Export Sales, and Concentrations of Risk

    Significant Customer
        Sales to one customer accounted for 24%, 23%, and 25% of the
    Company's total revenues in 1997, 1996, and 1995, respectively.

    Export Sales
        Export revenues to European countries accounted for 9%, 10%, and 11%
    of the Company's total revenues in 1997, 1996, and 1995, respectively.
    Export revenues to other countries accounted for 7%, 8%, and 7% of the
    Company's total revenues in 1997, 1996, and 1995, respectively.

    Concentrations of Risk
        Certain raw materials used in the manufacture of the Company's LVAS
    are available from only one or two suppliers. The Company is making
    efforts to minimize the risks associated with sole sources and ensure
    long-term availability, including qualifying alternative materials and
    components or developing alternative sources for materials or components
    supplied by a single source. Although the Company believes that it has
    adequate supplies of materials and components to meet demand for the LVAS
    for the foreseeable future, no assurance can be given that the Company
    will not experience shortages of certain materials or components in the
    future that could delay shipments of the LVAS.
        The Company sells its products to customers in the healthcare
    industry. The Company does not normally require collateral or other
    security to support its accounts receivable. Management does not believe
    that this concentration of credit risk has, or will have, a significant
    negative impact on the Company.

















                                       22
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    12. Earnings per Share

    (In thousands except per share amounts)     1997       1996        1995
    -----------------------------------------------------------------------

    Basic
    Net income                              $ 9,019     $10,030     $11,135
                                            -------     -------     -------
      
    Weighted average shares                  36,126      36,568      35,002
    Shares issuable in connection with the
      acquisition of International
      Technidyne (Note 3)                     3,356       3,356       3,356
                                            -------     -------     -------

                                             39,482      39,924      38,358
                                            -------     -------     -------

    Basic earnings per share                $   .23     $   .25     $   .29
                                            =======     =======     =======

    Diluted
    Net income                              $ 9,019     $10,030     $11,135
    Effect of convertible debentures              -           -           5
                                            -------     -------     -------

    Income available to common
      shareholders, as adjusted             $ 9,019     $10,030     $11,140
                                            -------     -------     -------

    Basic weighted average shares            39,482      39,924      38,358
    Effect of:
      Convertible debentures                      2         559       1,778
      Stock options                             281         446         514
                                            -------     -------     -------

    Weighted average shares, as adjusted     39,765      40,929      40,650
                                            -------     -------     -------

    Diluted earnings per share              $   .23     $   .25     $   .27
                                            =======     =======     =======

        The computation of diluted earnings per share excludes the effect of
    assuming the exercise of certain outstanding stock options because the
    effect would be antidilutive. At January 3, 1998, there were 883,100 of
    such options outstanding, with exercise prices ranging from $26.48 to
    $48.97 per share.
        In addition, the computation of diluted earnings per share for 1997
    excludes the effect of assuming the conversion of $70,000,000 principal
    amount of 4 3/4% subordinated convertible debentures, convertible at
    $31.415 per share, because the effect would be antidilutive.










                                       23
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                   Notes to Consolidated Financial Statements

    13. Unaudited Quarterly Information

    (In thousands except per share amounts)

    1997                      First       Second        Third       Fourth
    ----------------------------------------------------------------------

    Revenues                $14,902      $15,931      $14,727      $17,274
    Gross profit              7,973        8,703        8,674       10,341
    Net income                1,875        2,222        2,228        2,694
    Basic and diluted
      earnings per share        .05          .06          .06          .07

    1996                      First       Second        Third       Fourth(a)
    -------------------------------------------------------------------------

    Revenues                $15,405      $15,893      $16,084      $16,580
    Gross profit              8,896        9,501        9,787        8,646
    Net income (loss)         3,431        3,573        3,962         (936)
    Earnings (loss) per
      share:
        Basic                   .09          .09          .10         (.02)
        Diluted                 .08          .09          .10         (.02)
    ____________
    (a) Includes a write-off of $4,909,000 of acquired technology.






























                                       24
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                    Report of Independent Public Accountants

    To the Shareholders and Board of Directors of Thermo Cardiosystems Inc.:

        We have audited the accompanying consolidated balance sheet of Thermo
    Cardiosystems Inc. (a Massachusetts corporation and 51%-owned subsidiary
    of Thermedics Inc.) and subsidiaries as of January 3, 1998, and December
    28, 1996, and the related consolidated statements of income,
    shareholders' investment, and cash flows for each of the three years in
    the period ended January 3, 1998. These consolidated financial statements
    are the responsibility of the Company's management. Our responsibility is
    to express an opinion on these consolidated financial statements based on
    our audits.
        We conducted our audits in accordance with generally accepted
    auditing standards. Those standards require that we plan and perform the
    audit to obtain reasonable assurance about whether the financial
    statements are free of material misstatement. An audit includes
    examining, on a test basis, evidence supporting the amounts and
    disclosures in the financial statements. An audit also includes assessing
    the accounting principles used and significant estimates made by
    management, as well as evaluating the overall financial statement
    presentation. We believe that our audits provide a reasonable basis for
    our opinion.
        In our opinion, the consolidated financial statements referred to
    above present fairly, in all material respects, the financial position of
    Thermo Cardiosystems Inc. and subsidiaries as of January 3, 1998, and
    December 28, 1996, and the results of their operations and their cash
    flows for each of the three years in the period ended January 3, 1998, in
    conformity with generally accepted accounting principles.



                                           Arthur Andersen LLP



    Boston, Massachusetts
    February 12, 1998

















                                       25
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

        Forward-looking statements, within the meaning of Section 21E of the
    Securities Exchange Act of 1934, are made throughout this Management's
    Discussion and Analysis of Financial Condition and Results of Operations.
    For this purpose, any statements contained herein that are not statements
    of historical fact may be deemed to be forward-looking statements.
    Without limiting the foregoing, the words "believes," "anticipates,"
    "plans," "expects," "seeks," "estimates," and similar expressions are
    intended to identify forward-looking statements. There are a number of
    important factors that could cause the results of the Company to differ
    materially from those indicated by such forward-looking statements,
    including those detailed immediately after this Management's Discussion
    and Analysis of Financial Condition and Results of Operation under the
    heading "Forward-looking Statements."

    Overview

        The Company is a leader in the research, development, and manufacture
    of implantable left ventricular-assist systems (LVAS). Its HeartMate(R)
    devices are designed to perform substantially all or part of the pumping
    function of the left ventricle of the natural heart for patients
    suffering from cardiovascular disease.
        In general, a profit cannot be earned from the sale of an LVAS in the
    United States until approval of the device has been received from the
    U.S. Food and Drug Administration (FDA) for commercial sale. Until such
    approval is obtained, only the direct and indirect costs of the LVAS can
    be recovered, which are included in the Company's revenues. With the
    FDA's approval of the air-driven LVAS, the Company began earning a profit
    on the sale of such systems in 1994.
        The Company derives its revenues from two types of sales:
    implementation programs and subsequent implants. Implementation programs
    consist of initial sales to new clinical centers or foreign distributors,
    as well as sales of a new system, such as the electric LVAS, to an
    existing customer. Revenues recorded from subsequent implants consist of
    sales to an existing customer other than the initial sale of the
    implementation program. In general, the Company receives greater revenues
    from the sale of an implementation program than from a subsequent
    implant.
        In December 1996, the Company acquired substantially all of the
    assets, subject to certain liabilities, of Nimbus Medical, Inc., a
    research and development organization. Nimbus has been involved in
    artificial heart technology for more than 20 years and has carried out
    research in two primary fields: ventricular-assist devices and total
    artificial hearts. Nimbus was instrumental in developing the basic
    technology for high-speed rotary blood pumps. Because of their smaller
    size, rotary blood pumps may potentially be used to provide cardiac
    support in small adults and in children.
        The Company's International Technidyne Corporation subsidiary is a
    leading manufacturer of near-patient, whole-blood coagulation testing
    equipment and related disposables and also manufactures premium-quality,
    single-use skin-incision devices.


                                       26
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    Results of Operations

    1997 Compared With 1996
        Revenues were $62,834,000 in 1997, compared with $63,962,000 in 1996.
    This decrease was primarily due to a $6,612,000 decrease in revenues from
    the Company's air-driven LVAS, offset in part by a $1,943,000 increase in
    revenues from the Company's electric LVAS. The Company expects that
    revenues from sales of its LVAS will stabilize at approximately current
    levels until the electric system is approved in the U.S. for commercial
    sale. The Company believes that this approval could occur within the
    first six months of 1998, however, there can be no assurance that the
    Company will receive this approval within the expected time period, or at
    all. The decrease in revenues in 1997 was also offset in part by the
    inclusion of $1,992,000 in revenues from Nimbus, acquired in December
    1996, as well as an increase in revenues from International Technidyne to
    $35,873,000 in 1997 from $33,992,000 in 1996. International Technidyne's
    revenues increased primarily due to increased demand.
        The gross profit margin decreased to 57% in 1997 from 58% in 1996,
    primarily due to a shift in the sales mix to the lower-margin electric
    LVAS and, to a lesser extent, increased warranty costs due to a
    Company-initiated modification of certain of its LVAS, completed in the
    first quarter of 1997. The Company will continue to be unable to earn a
    profit on sales of the electric LVAS in the U.S. until FDA approval of
    that system is obtained. This decrease was offset, in part, by improved
    margins at International Technidyne, primarily due to manufacturing
    efficiencies. The Company announced an overall price increase of
    approximately 10% in the electric LVAS product line, effective June 28,
    1997, to help offset increased production costs.
        Selling, general, and administrative expenses as a percentage of
    revenues increased to 26% in 1997 from 22% in 1996, primarily due to
    higher marketing expenses as a result of an increase in the Company's
    LVAS sales force and, to a lesser extent, an increase in promotional
    expenses at International Technidyne.
        Research and development expenses increased to $8,682,000 in 1997
    from $7,498,000 in 1996, primarily due to a clinical trial being
    conducted by the Company to evaluate the electric LVAS as an alternative
    to medical therapy and, to a lesser extent, the inclusion of expenditures
    at Nimbus, acquired in December 1996. The Company expects research and
    development expenses to continue to increase over the life of the
    clinical trial, estimated at two to three years. There can be no
    assurance that the Company will complete this study or that it will
    receive FDA approval of the electric LVAS as an alternative to medical
    therapy during this time period, or at all.
        In connection with the December 1996 acquisition of the Nimbus
    business, the Company wrote off $4,909,000 in 1996, which represents the
    portion of the purchase price allocated to technology in development
    based on estimated replacement cost (Note 3).
        Interest income increased to $6,476,000 in 1997 from $5,297,000 in
    1996, primarily as a result of higher average invested balances resulting
    from the sale of $70,000,000 principal amount of 4 3/4% subordinated
    convertible debentures in May 1997 (Note 6).

                                       27
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    1997 Compared With 1996 (continued)
        Interest expense increased to $2,244,000 in 1997 from $80,000 in
    1996, primarily as a result of the issuance of the 4 3/4% subordinated
    convertible debentures.
        The Company recorded a gain on sale of investments, net, of $5,000 in
    1997, compared with $919,000 in 1996 (Note 2).
        The effective tax rates were 39% in both 1997 and 1996. The effective
    tax rates exceeded the statutory federal income tax rate primarily due to
    the impact of state income taxes.
        The Company is currently assessing the potential impact of the year
    2000 on the processing of date-sensitive information by the Company's
    computerized information systems and on products sold as well as products
    purchased by the Company. The Company believes that its internal
    information systems and current products are either year 2000 compliant
    or will be so prior to the year 2000 without incurring additional costs.
    There can be no assurance, however, that the Company will not experience
    unexpected costs and delays in achieving year 2000 compliance for its
    internal information systems and current products, which could result in
    a material adverse effect on the Company's future results of operations.
        The Company is presently assessing the effect that the year 2000
    problem may have on its previously sold products. The Company is also
    assessing whether its key suppliers are adequately addressing this issue
    and the effect this might have on the Company. The Company has not
    completed its analysis and is unable to conclude at this time that the
    year 2000 problem as it relates to its previously sold products and
    products purchased from key suppliers is not reasonably likely to have a
    material adverse effect on the company's future results of operations.

    1996 Compared With 1995
        Revenues in 1996 increased 21% to $63,962,000 from $52,880,000 in
    1995, primarily due to a $9,377,000 increase in LVAS sales and, to a
    lesser extent, a $1,705,000 increase in sales of International Technidyne
    products, primarily due to an increase in demand.
        The gross profit margin remained constant at 58% in 1996 and 1995.
    The LVAS product gross profit margin increased to 60% in 1996 from 57% in
    1995, primarily due to an increase in revenues from higher-margin
    implementation programs, an increase in sales volume and, to a lesser
    extent, manufacturing efficiencies. These increases were offset in part
    by costs associated with modifications made to the Company's LVAS. In
    addition, the gross profit margin at International Technidyne decreased
    slightly to 57% in 1996 from 58% in 1995, due primarily to increased
    costs associated with a new facility.
        Selling, general, and administrative expenses as a percentage of
    revenues decreased slightly to 22% in 1996 from 23% in 1995. LVAS-related
    expenses as a percentage of revenues remained constant at 20% in 1996 and
    1995. Higher marketing expenses due to an increase in the Company's LVAS
    sales force were offset by lower expenses as a percentage of revenues due
    to an increase in LVAS sales volume. Selling, general, and administrative
    expenses as a percentage of revenues declined slightly at International
    Technidyne to 24% in 1996 from 25% in 1995 due to an increase in
    revenues.

                                       28
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                     Management's Discussion and Analysis of
                  Financial Condition and Results of Operations

    1996 Compared With 1995 (continued)
        Research and development expenses of $7,498,000 in 1996 and
    $7,111,000 in 1995 reflect the Company's continued commitment to product
    development.
        In connection with the December 1996 acquisition of the Nimbus
    business, the Company wrote off $4,909,000, which represents the portion
    of the purchase price allocated to technology in development based on
    estimated replacement cost.
        Interest income increased to $5,297,000 in 1996 from $5,117,000 in
    1995, primarily as a result of higher invested balances. Interest expense
    decreased to $80,000 in 1996 from $274,000 in 1995, primarily as a result
    of lower amortization of deferred issuance costs associated with the
    Company's noninterest-bearing subordinated convertible debentures due to
    the conversion of $7,887,000 principal amount of these debentures in
    1996.
        The Company recorded a gain on sale of investments, net, of $919,000
    in 1996, compared with $421,000 in 1995 (Note 2).
        The effective tax rates were 39% and 32% in 1996 and 1995,
    respectively. The effective tax rate in 1996 exceeded the statutory
    federal income tax rate primarily due to the impact of state income
    taxes. The effective tax rate in 1995 was below the statutory federal
    income tax rate due to the reversal of a tax valuation allowance that was
    no longer required.

    Liquidity and Capital Resources
        Working capital was $136,702,000 at January 3, 1998, compared with
    $65,328,000 at December 28, 1996. Cash, cash equivalents, and short- and
    long-term available-for-sale investments were $129,412,000 at January 3,
    1998, compared with $81,532,000 at December 28, 1996. During 1997,
    $14,023,000 of cash was provided by operating activities. Cash of
    $1,987,000 was provided by a decrease in accounts receivable, due to
    improved collections. In addition, cash of $1,186,000 was provided by an
    increase in current liabilities, primarily accrued income taxes.
        During 1997, the Company's primary investing activity, excluding
    available-for-sale investments activity, was the expenditure of
    $2,333,000 for purchases of property, plant, and equipment.
        During 1997, the Company's financing activities provided $35,885,000
    of cash. In May 1997, the Company issued and sold at par $70,000,000
    principal amount of 4 3/4% subordinated convertible debentures due 2004,
    for net proceeds of $68,028,000 (Note 6). Through a series of actions
    commencing in August 1996, the Company's Board of Directors has
    authorized the repurchase, through various dates ending in June 1998, of
    up to $50.0 million of its own securities in the open market, or in
    negotiated transactions. Any repurchases under the Company's
    authorizations are funded from working capital. Through January 3, 1998,
    the Company had expended $38,622,000 under these authorizations of which
    $32,957,000 was funded in 1997.
        In 1998, the Company expects to make capital expenditures of
    approximately $4,000,000, including expenditures for manufacturing and
    tooling equipment and leasehold improvements. The Company believes it has
    adequate resources to meet its financial needs for the foreseeable
    future.

                                       29
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Forward-looking Statements

        In connection with the "safe harbor" provisions of the Private
    Securities Litigation Reform Act of 1995, the Company wishes to caution
    readers that the following important factors, among others, in some cases
    have affected, and in the future could affect, the Company's actual
    results and could cause its actual results in 1998 and beyond to differ
    materially from those expressed in any forward-looking statements made
    by, or on behalf of, the Company.

        Uncertainty of Regulatory Approval for Biomedical Devices. The
    Company's biomedical devices, including its left ventricular-assist
    systems (LVAS), are subject to approval by the U.S. Food and Drug
    Administration (FDA) before commercial sale of such devices may commence
    in the U.S. The Company is also subject to regulatory requirements in
    foreign countries in which the Company markets its devices. The process
    of obtaining regulatory approvals is lengthy, expensive, and inherently
    uncertain. Even after FDA and other regulatory approvals have been
    obtained, such approvals can be suspended or revoked if the Company's
    products do not continue to satisfy regulatory requirements. Failure to
    comply with applicable regulatory requirements can result in, among other
    things, fines, suspensions of approvals, recalls of products, operating
    restrictions, and criminal prosecutions.
        In October 1994, the Company received FDA approval for the commercial
    sale of its pneumatic LVAS. In April 1994, the Company received the CE
    Mark for commercial sale of the pneumatic LVAS in all European Union
    countries. The Company's HeartPak(TM) portable console received the CE
    Mark in February 1995 and the HeartPak is currently in Phase I clinical
    trials in the U.S. The Company's electric LVAS is currently in use in
    clinical trials in the U.S. These trials are testing the safety and
    efficacy of the device as both a bridge to transplant and as an
    alternative to medical therapy. The electric LVAS received the CE Mark in
    August 1995.
        In June 1997, the Company submitted a premarket approval (PMA)
    supplemental application to receive FDA approval of its electric LVAS for
    use as a bridge to transplant. This application is currently under
    review; however, no assurance can be given that the FDA will review this
    application on a timely basis or will grant approval once its review is
    complete. Significant design changes to the Company's LVAS, including use
    of the portable console for the pneumatic LVAS, must be approved pursuant
    to a supplement to an approved PMA application. Failure of the Company to
    obtain FDA approval for the commercial sale of the electric LVAS, either
    as a bridge to transplant or as an alternative to medical therapy, would
    have a material adverse effect on the Company's long-term growth
    prospects. In addition, failure of the Company to obtain approval for the
    HeartPak portable console would likely require patients supported by the
    pneumatic LVAS to remain hospitalized. This could materially restrict the
    market for the pneumatic LVAS.

        Uncertainty of Patient Reimbursement. The cost of implanting a
    cardiac support system is substantial. In addition, the Company's
    coagulation testing equipment can cost several thousand dollars per
    instrument. Without the financial support of the government or
    third-party insurers, the market for the Company's devices and equipment

                                       30
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Forward-looking Statements

    will be limited. Medicare and Medicaid limit the reimbursement that U.S.
    hospitals receive for treating certain medical conditions by setting
    maximum fees that can be charged to their patients. Under these systems,
    hospitals are paid a fixed amount for treating each patient with a
    particular diagnosis. Private insurers also have initiated reimbursement
    systems designed to slow the escalation of healthcare costs. In addition,
    the federal government is considering, and certain state governments are
    considering or have adopted, new healthcare policies intended to curb
    rising costs. Such policies include rationing of government-funded
    reimbursement for healthcare services and imposing price controls upon
    providers of medical products and services. These policies could have the
    effect of limiting the availability of reimbursement for procedures, such
    as the implantation of an LVAS, that involve prolonged treatment of
    critically ill patients.
        In November 1995, the U.S. Health Care Finance Administration (HCFA)
    issued a decision that extends Medicare coverage to the Company's
    HeartMate pneumatic LVAS. Several major nongovernment insurers have
    already agreed to offer coverage for the pneumatic LVAS. HCFA's coverage
    policy could also extend to the electric LVAS once approved; however,
    there can be no assurance that HCFA's coverage will extend to the
    electric LVAS. In addition, some major nongovernment insurers currently
    offer coverage for the electric LVAS because of its investigational
    device exemption status as a category B device (eligible for Medicare
    coverage and payment). Even though reimbursement has been established by
    HCFA and by certain nongovernment insurers for the pneumatic LVAS, the
    amount of available reimbursement may change, and reimbursement may be
    denied by an insurer under certain circumstances, including if it is
    determined that a procedure was not the most cost-effective treatment
    method, was experimental, or was used for an unapproved indication. No
    assurance can be given that additional third-party reimbursement for the
    pneumatic LVAS will be granted within a reasonable period of time, or at
    all. The unavailability of third-party reimbursement for procedures
    involving the Company's systems or for the Company's biomedical devices
    would have a material adverse effect on the Company's business.

        Uncertainty of Opinion Leader Acceptance and Support. A limited
    number of cardiac surgeons and cardiologists influence medical device
    selection and purchase decisions for a large portion of the target
    patient population. The Company will achieve its business objectives only
    if its LVAS are recommended for use by such opinion leaders. In addition,
    acceptance by these physicians of the Company's whole-blood coagulation
    monitoring systems and Coumadin monitors is also important to the success
    of the Company's business. The Company has developed working
    relationships with a number of leading medical centers, and its existing
    and proposed LVAS and its blood coagulation monitoring systems have been
    well received by opinion leaders in cardiac surgery and cardiology.
    Moreover, since the inception of its work on cardiac support systems in
    1966, the Company has relied upon surgical teams at medical institutions
    to perform clinical trials that are necessary for obtaining FDA
    approvals. A continuing working relationship with those and other
    institutions will be important to the success of the Company. No
    assurance can be given that existing relationships and arrangements can

                                       31
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Forward-looking Statements

    be maintained or that new relationships will be established. Furthermore,
    economic, psychological, ethical, and other concerns may limit acceptance
    of heart-assist devices in general, and there can be no assurance that
    markets of sufficient size will develop for the Company's LVAS.

        Technological Change and Competition. The Company is aware of only
    one other company performing clinical trials of intermediate or long-term
    LVAS support in humans. However, there are many organizations engaged in
    the development of various types of cardiac support systems, including a
    total artificial heart. As other organizations realize the commercial
    potential for LVAS, the Company believes that competition will intensify.
    Further, the Company has several competitors in the coagulation
    monitoring instrument market. Although the length of the regulatory
    approval process for medical equipment and devices such as LVAS is a
    barrier to entry into these markets, the Company's products could be
    rendered obsolete or uneconomical by technological advances by one or
    more of the Company's present competitors or by future entrants into the
    markets in which the Company competes. Many manufacturers of medical
    devices have greater research and development, manufacturing, and
    marketing resources than those of the Company.

        Availability of Components and Raw Materials. The Company relies on a
    number of custom-designed components and materials supplied by other
    companies to manufacture its LVAS. The Company is making efforts to
    minimize the risks associated with sole sources and ensure long-term
    availability, including qualifying alternative materials and components
    or developing alternative sources for materials and components supplied
    by a single source. Although the Company believes that it has adequate
    supplies of materials and components to meet demand for its products for
    the foreseeable future, no assurance can be given that the Company will
    not experience shortages of certain materials or components in the future
    that could delay shipments of its products. The cost to the Company to
    evaluate and test alternative materials and components and the time
    necessary to obtain FDA approval for these materials are inherently
    difficult to determine because both time and cost are dependent on at
    least two factors: the similarity of the alternative material or
    component to the original material or component, and the amount of
    third-party testing that may have already been completed on alternative
    materials or components. There can be no assurance that the substitution
    of alternative materials or components would not cause delays in the
    Company's LVAS development programs or adversely affect the Company's
    ability to manufacture and ship LVAS to meet demand.

        Intellectual Property Rights. The Company relies principally upon
    trade secret protection and, to a lesser extent, patents to protect its
    proprietary rights with respect to its LVAS and its reagents, however,
    with respect to its coagulation equipment and skin-incision products, the
    Company relies principally on patents to protect its proprietary rights.
    No assurance can be given that the Company will be able to effectively
    protect its patents and trade secrets, or that competitors will not
    independently develop equivalent technology or design around the
    Company's patents. The Company's competitive position could be adversely

                                       32
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Forward-looking Statements

    affected if the Company is unable to protect adequately its proprietary
    rights. In addition, there can be no assurance that third parties will
    not assert claims against the Company that the Company infringes the
    intellectual property rights of such parties. The Company could incur
    substantial costs and diversion of management resources with respect to
    the defense of any such claims, which could have a material adverse
    effect on the Company's business, financial condition, and results of
    operations. Furthermore, parties making such claims could secure a
    judgment awarding substantial damages, as well as injunctive or other
    equitable relief, which could effectively block the Company's ability to
    make, use, sell, distribute or market its products and services in the
    U.S. or abroad. In the event that a claim relating to intellectual
    property is asserted against the Company, the Company may seek licenses
    to such intellectual property. There can be no assurance, however, that
    such licenses could be obtained on commercially reasonable terms, if at
    all. The failure to obtain the necessary licenses or other rights could
    preclude the sale, manufacture, or distribution of the Company's products
    and, therefore, could have a material adverse effect on the Company's
    business, financial condition, and results of operations. The Company has
    received correspondence from a third party alleging that the textured
    surface of the LVAS infringes certain patent rights of such third party.
    The Company believes that it has meritorious defenses to the claims of
    the third party. However, no assurance can be given that the Company
    would be successful if litigation was commenced or that others will not
    claim that the Company infringes their intellectual property rights.

        Limited Manufacturing and Marketing Experience. Prior to FDA approval
    of commercial sale of the pneumatic LVAS, the Company's LVAS business was
    engaged only in research and development. Since that time, the Company
    has been building its manufacturing, marketing, and sales capabilities.
    Although the Company has not experienced difficulties in manufacturing
    its LVAS at volume, cost, and quality levels sufficient to satisfy the
    increased demand resulting from commercial approval, no assurance can be
    given that the Company will not encounter difficulties as sales volumes
    increase or new products and/or components are approved for commercial
    sale. The Company does not have experience in the large-scale
    commercialization of LVAS medical devices. Although the Company has added
    sales and marketing staff and is expanding its distribution capabilities
    worldwide, no assurance can be given that the Company will be able to
    market and sell its LVAS products successfully in high volumes.

        Product Liability. The Company faces an inherent business risk of
    exposure to product liability claims relating to the use of its products.
    Although the Company currently maintains product liability insurance
    against this risk, there can be no assurance that it will continue to be
    able to obtain such coverage at economically feasible rates, if at all,
    or that such coverage will be adequate in terms and scope to completely
    protect the Company in the event of a successful product liability claim.

        International Operations and International Sales. In 1997, sales
    originating outside the U.S. and U.S. export sales accounted for
    approximately 19% of the Company's total revenues. The Company

                                       33
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                           Forward-looking Statements

    anticipates that sales outside the U.S. and U.S. export sales will
    continue to account for a significant percentage of the Company's total
    revenues. The Company intends to continue to expand its presence in
    international markets. International revenues are subject to a number of
    risks, including the following: agreements may be difficult to enforce
    and receivables difficult to collect through a foreign country's legal
    system; foreign customers may have longer payment cycles; foreign
    countries may impose additional withholding taxes or otherwise tax the
    Company's foreign income, impose tariffs or adopt other restrictions on
    foreign trade; U.S. export licenses may be difficult to obtain; the
    protection of intellectual property in foreign countries may be more
    difficult to enforce; and fluctuations in exchange rates may affect
    product demand and may adversely affect the profitability in U.S. dollars
    of products and services provided by the Company in foreign markets where
    payment for the Company's products and services is made in the local
    currency. There can be no assurance that any of these factors will not
    have a material effect on the Company's business and results of
    operations.

        Potential Impact of Year 2000 on Processing of Date-Sensitive
    Information. The Company is currently assessing the potential impact of
    the year 2000 on the processing of date-sensitive information by the
    Company's computerized information systems and on products sold as well
    as products purchased by the Company. The Company believes that its
    internal information systems and current products are either year 2000
    compliant or will be so prior to the year 2000 without incurring
    additional costs. There can be no assurance, however, that the Company
    will not experience unexpected costs and delays in achieving year 2000
    compliance for its internal information systems and current products,
    which could result in a material adverse effect on the Company's future
    results of operations.
        The Company is presently assessing the effect that the year 2000
    problem may have on its previously sold products. The Company is also
    assessing whether its key suppliers are adequately addressing this issue
    and the effect this might have on the Company. The Company has not
    completed its analysis and is unable to conclude at this time that the
    year 2000 problem as it relates to its previously sold products and
    products purchased from key suppliers is not reasonably likely to have a
    material adverse effect on the Company's future results of operations.














                                       34
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements

                         Selected Financial Information

    (In thousands except
    per share amounts)    1997(a)    1996(b)    1995(c)    1994(d)     1993
    -----------------------------------------------------------------------

    Statement of
      Income Data:
    Revenues          $ 62,834   $ 63,962   $ 52,880   $ 39,051   $ 27,849
    Net income           9,019     10,030     11,135      5,687      2,336
    Earnings per share:
      Basic                .23        .25        .29        .15        .06
      Diluted              .23        .25        .27        .14        .06

    Balance Sheet
      Data:
    Working capital   $136,702   $ 65,328   $ 64,610   $ 47,369   $ 19,048
    Total assets       173,208    124,978    124,285    109,988     74,225
    Long-term 
      obligations       70,000          -     11,642     33,450        600
    Shareholders'
      investment        92,963    111,089    103,416     68,382     67,514
    ____________
    (a) Reflects the May 1997 issuance of $70,000,000 principal amount of 
        4 3/4% subordinated convertible debentures due 2004 and conversion
        of $3,755,000 principal amount of noninterest-bearing subordinated
        convertible obligations.
    (b) Reflects conversion of $7,887,000 principal amount of
        noninterest-bearing subordinated convertible obligations and the
        December 1996 acquisition of Nimbus Medical, Inc.
    (c) Reflects conversion of $21,358,000 principal amount of noninterest-
        bearing subordinated convertible obligations.
    (d) Reflects the January 1994 issuance of $33,000,000 principal amount
        of noninterest-bearing subordinated convertible obligations due
        1997.





















                                       35
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements


    Common Stock Market Information
        The Company's common stock is traded on the American Stock Exchange
    under the symbol TCA. The following table sets forth the high and low
    sale prices of the Company's common stock for 1997 and 1996, as reported
    in the consolidated transaction reporting system.

                                       1997                  1996
                               -------------------    -------------------
    Quarter                       High        Low        High        Low
    --------------------------------------------------------------------

    First                      $32        $20 1/2     $55 1/3    $39 1/3
    Second                      28 7/8     19          55 3/8     39 7/12
    Third                       27 1/4     19 1/8      44 5/8     29 1/2
    Fourth                      28 7/8     19          38 1/4     23 3/8

        As of January 30, 1998, the Company had 469 holders of record of its
    common stock. This does not include holdings in street or nominee names.
    The closing market price on the American Stock Exchange for the Company's
    common stock on January 30, 1998, was $21 7/8 per share.

    Shareholder Services
        Shareholders of Thermo Cardiosystems Inc. who desire information
    about the Company are invited to contact John N. Hatsopoulos, Chief
    Financial Officer, Thermo Cardiosystems Inc., 81 Wyman Street, P.O. Box
    9046, Waltham, Massachusetts 02254-9046, (781) 622-1111. A mailing list
    is maintained to enable shareholders whose stock is held in street name,
    and other interested individuals, to receive quarterly reports, annual
    reports, and press releases as quickly as possible. Distribution of
    printed quarterly reports is limited to the second quarter only. All
    material will be available from Thermo Electron's Internet site
    (http://www.thermo.com/subsid/tca1.html).

    Stock Transfer Agent
        American Stock Transfer & Trust Company is the stock transfer agent
    and maintains shareholder activity records. The agent will respond to
    questions on issuance of stock certificates, change of ownership, lost
    stock certificates, and change of address. For these and similar matters,
    please direct inquiries to:

        American Stock Transfer & Trust Company
        Shareholder Services Department
        40 Wall Street, 46th Floor
        New York, New York 10005
        (718) 921-8200

    Dividend Policy
        Except for a $.01 per share dividend distributed to partially offset
    income tax liability relating to the Company's recapitalization in 1990,
    the Company has never paid any cash dividends because its policy is to
    use earnings to finance expansion and growth. The Company's Board of
    Directors anticipates that for the foreseeable future no cash dividends
    will be paid on the Company's common stock.



                                       36
<PAGE>




    Thermo Cardiosystems Inc.                       1997 Financial Statements


    Form 10-K Report
        A copy of the Annual Report on Form 10-K for the fiscal year ended
    January 3, 1998, as filed with the Securities and Exchange Commission,
    may be obtained without charge by writing to John N. Hatsopoulos, Chief
    Financial Officer, Thermo Cardiosystems Inc., 81 Wyman Street, P.O. Box
    9046, Waltham, Massachusetts 02254-9046.

    Annual Meeting
        The annual meeting of shareholders will be held on Monday, June 1,
    1998, at 1:30 p.m., at the Hyatt Regency Hotel, Scottsdale, Arizona.

































                                       37
<PAGE>



                                                                      Exhibit 23

                 Consent of Independent Public Accountants
    As independent public accountants, we hereby consent to the
incorporation by reference of our reports dated February 12, 1998,
included in or incorporated by reference into Thermo Cardiosystems Inc.'s
Annual Report on Form 10-K for the year ended January 3, 1998, into the
Company's previously filed Registration Statement No. 33-45283 on Form
S-8, Registration Statement No. 33-45255 on Form S-8, Registration
Statement No. 33-52822 on Form S-8, Registration Statement No. 33-75654 on
Form S-3, Registration Statement No. 33-78732 on Form S-8, Registration
Statement No. 33-78730 on Form S-8, Registration Statement No. 33-78734 on
Form S-8, Registration Statement No. 33-78736 on Form S-8, Registration
Statement No. 33-78728 on Form S-8, Registration Statement No. 033-65271
on Form S-8, Registration Statement No. 333-5671 on Form S-3, Registration
Statement No. 333-29287 on Form S-3, and Registration Statement No.
333-08809 on Form S-8.



                                               Arthur Andersen LLP



Boston, Massachusetts
February 11, 1999



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