EXHIBIT (a)(14)

              NOTICE OF CHANGE IN ELECTION FROM REJECT TO ACCEPT

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If you previously elected to reject NMT Medical, Inc.'s offer to exchange
options, and you would like to change your election and accept this offer, you
must sign this Notice and execute a new Election Form and return both documents
to Philip A. Hoffstein before midnight, Boston, Massachusetts Time, on April 23,
2001, unless the offer is extended. If you have questions, please call Philip A.
Hoffstein at (617) 737-0930.
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To NMT Medical, Inc.:

     I previously received a copy of the offer to Exchange (dated March 27, 2001
and as amended on April 6, 2001), the Cover Letter and an Election Form.  I
signed and returned the Election Form, in which I elected to reject NMT
Medical's offer to exchange options.  I now wish to change that election and
accept your offer to exchange options.  I understand that by signing this
Notice, signing a new Election Form and delivering both documents to Philip A.
Hoffstein, I will be able to withdraw my rejection of the offer and accept the
offer to exchange options instead.  I have read, understand and agree to all of
the terms and conditions of the offer to exchange options.

     I understand that in order to accept the offer, I must sign and deliver
this Notice and a new Election Form to Philip A. Hoffstein before midnight,
Boston, Massachusetts Time, on April 23, 2001, or if NMT Medical extends the
deadline to exchange options, before the extended expiration of the offer.

     I further understand that NMT Medical will not exchange any conditional or
partial returns of options. I have completed and signed the following exactly as
my name appears on my original Election Form.

     I accept the offer to exchange options.

X
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  Signature

Date:               , 2001
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Name:
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     (Please Print)