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EXHIBIT 10.17

LETTER AMENDMENT No. 1

        March 18, 2004

M&I Marshall & Ilsley Bank
651 Nicollet Mall
Minneapolis, Minnesota 55402-1611

Ladies/Gentlemen:

        We refer to the Revolving Credit and Term Loan Agreement dated as of
October 17, 2003 (the "Credit Agreement") between you and us (under our former
name of MedAmicus, Inc.). Unless otherwise defined in this letter amendment,
terms defined in the Credit Agreement are used in this letter amendment as
defined in the Credit Agreement.

        It is hereby agreed by you and us as follows:

        The Credit Agreement is, effective the date first above written, hereby
amended as follows:

(a)Section 2.1 is amended by changing the Termination Date to be April 30, 2005.

(b)Section 5.1(d) is amended to provide that the compliance certificate
described in that Section needs to be provided within 30 days after the end of
each fiscal quarter rather than within 30 days after the end of each month.

(c)Section 5.1(g) is amended to read in full to read as follows:

        (g)    Senior Funded Debt Ratio.    Maintain as of the end of each
fiscal quarter for the designated time period then ended, a Senior Funded Debt
Ratio of not more than the following:

Time Period

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  Maximum Ratio

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For the six months ending at 3/31/04   2.75 to 1 For the nine months ending at
6/30/04   2.0 to 1 For the twelve months ending at 9/30/04 and at each fiscal
quarter end thereafter   1.25 to 1

For purposes of calculating the Senior Funded Debt Ratio for the periods ending
March 31, 2004, June 30, 2004 and September 30, 2004, the Borrower may add back
into EBITDA a one-time intangible asset write-off expense in an amount of not
more than $2,650,000 taken by the Borrower during 2003.

        We have requested that you waive our failure to comply with
Section 5.1(g) [Senior Funded Debt Ratio] and Section 5.1(h) [Fixed Charge
Coverage Ratio] of the Credit Agreement as of December 31, 2003 and that you
waive our failure to deliver compliance certificates under Section 5.1(d) of the
Credit Agreement as of November 30, 2003 and January 31, 2004. You have agreed
to this request. We acknowledge that this waiver is subject to the provisions of
Sections 7.1 and 7.2 of the Credit Agreement.

        On and after the effective date of this letter amendment, each reference
in the Credit Agreement to "this Agreement", "hereunder", "hereof", or words of
like import referring to the Credit Agreement, and each reference in the Notes
and the Security Agreements to "the Credit Agreement", "thereunder", "thereof",
or words of like import referring to the Credit Agreement, shall mean and be a
reference to the Credit Agreement as amended by this letter amendment. The
Credit Agreement, as amended by this letter amendment, is and shall continue to
be in full force and effect and is hereby in all respects ratified and
confirmed.

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        This letter amendment may be executed in any number of counterparts and
by any combination of the parties hereto in separate counterparts, each of which
counterparts shall be an original and all of which taken together shall
constitute one and the same letter amendment.

        If you agree to the terms and provisions hereof, please evidence your
agreement by executing and returning one counterpart of this letter amendment to
us. This letter amendment shall become effective as of the date first above
written when and if counterparts of this letter amendment shall have been
executed by you and us and the consent attached hereto shall have been executed
by Enpath Lead Technologies, Inc. (f/k/a Medacqusition, Inc.).

            Very truly yours,
 
 
 
 
 
 
Enpath Medical, Inc.
 
 
 
 
 
 
By
 
    

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                Its       

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Agreed as of the date
first above written:
M&I Marshall & Ilsley Bank
By
 
    

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      Its       

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By
 
    

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      Its       

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2

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CONSENT

        The undersigned, as Debtor under the Third Party Security Agreement
dated as of October 17, 2003 (the "Pledge") in favor of M&I Marshall & Ilsley
Bank referred to in the foregoing letter amendment, hereby consents to such
letter amendment and hereby confirms and agrees that the Pledge is, and shall
continue to be, in full force and effect and is hereby ratified and confirmed in
all respects except that, on and after the effective date of such letter
amendment, each reference in the Pledge to "the Credit Agreement", "thereunder",
"thereof" or words of like import referring to the Credit Agreement shall mean
and be a reference to the Credit Agreement as amended by such letter amendment.

    Enpath Lead Technologies, Inc.
(f/k/a Medacqusition, Inc.)
 
 
By
 
    

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        Its       

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LETTER AMENDMENT No. 1