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In Test of Stents, Old Standby Wins Out
Date:9/28/2010

By Steven Reinberg
HealthDay Reporter

MONDAY, Sept. 27 (HealthDay News) -- In a head-to-head comparison of drug-coated stents -- the metal mesh tubes used to keep clogged arteries open -- the well-established model using the drug sirolimus came out on top, South Korean researchers report.

A newer version, one coated with zotarolimus, fell short, the study found.

Coating stents with time-released drugs can help prevent infection or clogging in stents, but researchers have questioned the safety and effectiveness of different coatings.

"Drug-coated stents have reduced re-stenosis rates compared to bare metal stents, but require prolonged dual antiplatelet therapy to prevent clotting of the drug-coated stent," said Dr. Gregg Fonarow, an American Heart Association spokesman. "There has been great interest in developing stents coated with alternative drugs and different polymers," he explained.

The study was released online Sept. 27 ahead of print publication in the Oct. 5 issue of the Journal of the American College of Cardiology.

In preventing major cardiac events, the researchers found that zotarolimus-coated stents, the new entry in the field, were less effective than the sirolimus-eluting stents, but better than stents coated with paclitaxel.

"Similar to other comparative stent trials, the sirolimus-eluting stent seemed to come out ahead in safety and efficacy," said Fonarow, who is also a cardiology professor at the University of California, Los Angeles.

For the study, a team led by Dr. Duk-Woo Park from the University of Ulsan College of Medicine and Asan Medical Center in Seoul randomly assigned 2,645 patients undergoing angioplasty, a procedure to restore blood flow through the artery, to one of the three stents.

After a year, Park's team tallied the number of adverse cardiac events the patients experienced, including death, heart attack and the need for a new angiopl
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