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Filter Fails to Improve PCI Outcomes in Acute Coronary Syndromes
Date:3/30/2008

Windsock-like device catches debris but doesn't avoid damage to heart

muscle

CHICAGO, March 30 /PRNewswire/ -- A device that catches bits of plaque and blood clot that break loose during percutaneous coronary intervention (PCI) has failed to show that it can reduce rates of major cardiovascular complications in patients with acute coronary syndromes, a condition that encompasses unstable angina and a type of heart attack known as non-ST-elevation myocardial infarction (NSTEMI). Although the EZ FilterWire captured debris in the bloodstream in nearly half of patients, it did not reduce damage to the heart muscle.

Investigators for the Angioplasty Balloon-Associated Coronary Debris and the EZ FilterWire (A-F) study had expected the results to be more encouraging. First, the study focused on patients with arterial blockages that appeared particularly likely to be a source of downstream debris during PCI. In addition, myonecrosis, or debris-caused damage to the heart muscle resulting from blockage of tiny blood vessels, is fairly common.

"PCI is associated with myonecrosis in about 25 percent of patients with non-STEMI acute coronary syndromes," said Mark W.I. Webster, MD, director of the cardiac catheterization laboratory at Auckland City Hospital, Auckland, New Zealand. "Although there are other mechanisms, distal embolism of atherosclerotic plaque and/or thrombus is recognized to be a frequent cause."

The A-F study is being presented today in a Late-Breaking Clinical Trials session at the SCAI Annual Scientific Sessions in Partnership with ACC i2 Summit (SCAI-ACCi2) in Chicago. SCAI-ACCi2 is a scientific meeting for practicing cardiovascular interventionalists sponsored by the Society for Cardiovascular Angiography and Interventions (SCAI) in partnership with the American College of Cardiology (ACC).

The EZ FilterWire is a coronary guidewire with a plastic sack shaped like a windsock attache
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SOURCE SCAI-ACCi2
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