NMT Medical to Release First-Quarter 2008 Financial Results on May 6

Company to Webcast Conference Call Live
BOSTON--(Business Wire)--
NMT Medical, Inc. (NASDAQ: NMTI) today announced that it will
release its first-quarter 2008 financial results before the market
opens on Tuesday, May 6, 2008.

Management will host a conference call at 10:00 a.m. (ET) that
morning to review the Company's financial results and provide a
business update. The conference call will be broadcast live over the
Internet. Individuals interested in listening to the webcast should
log onto the "Investor Relations" section of NMT Medical's website,
www.nmtmedical.com.

The call also may be accessed by dialing (877) 407-5790 or (201)
689-8328. For interested individuals unable to join the live
conference call, a webcast replay will be available on the Company's
website for approximately three months.

About NMT Medical, Inc.

NMT Medical is an advanced medical technology company that
designs, develops, manufactures and markets proprietary implant
technologies that allow interventional cardiologists to treat
structural heart disease through minimally invasive, catheter-based
procedures. NMT is currently investigating the potential connection
between a common heart defect that allows a right to left shunt or
flow of blood through a defect like a patent foramen ovale (PFO) and
brain attacks such as embolic stroke, transient ischemic attacks
(TIAs) and migraine headaches. A common right to left shunt can allow
venous blood, unfiltered and unmanaged by the lungs, to enter the
arterial circulation of the brain, possibly triggering a cerebral
event or brain attack. More than 27,000 PFOs have been treated
globally with NMT's minimally invasive, catheter-based implant
technology.

Stroke is the third leading cause of death in the United States
and the leading cause of disability in adults. Each year, 750,000
Americans suffer a new or recurrent stroke and an additional 500,000
Americans experience a TIA. The prevalence of migraines in the United
States is about 10%. Of the 28 million migraine sufferers in America,
those who experience aura and have a PFO may represent a three million
patient subset.

For more information about NMT Medical, please visit
www.nmtmedical.com.

NMT Medical, Inc.
Richard E. Davis, 617-737-0930
Executive Vice President & Chief Financial Officer
red@nmtmedical.com

Copyright Business Wire 2008