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Study: Drug-eluting Stents as Safe as Bare Metal Ones

by Rajashri on October 18, 2008 at 3:23 PM
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 Study: Drug-eluting Stents as Safe as Bare Metal Ones

Drug-eluting stents are more effective and as safe as bare metal stents for treating heart attack patients, a new study has found.

The trial, called the HORIZONS AMI (Harmonizing Outcomes with RevascularIZatiON and Stents in Acute Myocardial Infarction), is the largest randomized trial to compare drug-eluting stent to bare metal stent use in heart attack patients.

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It showed that drug-eluting stents reduced rates of target lesion revascularization (TLR) and binary angiographic restenosis when compared to the use of a bare metal stent.

It was found that the implantation of the drug-eluting stent resulted in a significant 41percent reduction of ischemia-driven target lesion revascularization (TLR).
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TLR is the rate at which a particular lesion needs to be revascularized following angioplasty and was the primary efficacy endpoint of the trial.

Drug-eluting stent also resulted in a significant 56 percent reduction in binary restenosis after 13 months, which is the rate at which the artery narrows following implantation of the stent, and was the secondary efficacy endpoint of the trial.

The drug-eluting stent had a rate of 10.0 percent and the bare metal stent had a rate of 22.9 percent.

"These results provide definitive evidence that drug-eluting stents are superior in efficacy to bare metal stents and have a comparable safety profile at 1 year," said Gregg W. Stone, M.D., CRF Chairman, Professor of Medicine and the Director of Research and Education at the Center for Interventional Vascular Therapy at NewYork Presbyterian-Hospital/Columbia University Medical Center.

"Outcomes from prior registry studies of drug-eluting stents compared to bare metal stents have been conflicting; this is the first prospective, large, international randomized clinical trial and provides conclusive evidence on this subject," said Dr. Stone.

He added: "The findings from the HORIZONS AMI trial will have a major impact on how decisions are made regarding drug-eluting and bare metal stents in the highest risk patients, those in the early hours of a heart attack. This study removes much of the uncertainty and concern about the efficacy and safety of drug-eluting stents in this clinical setting. Moreover, all of the patients in this trial will be followed for 5 years to ensure that these favorable results are maintained."

The trial was conducted on almost 3,600 heart attack patients in 11 countries, 3,006 of whom were randomized to paclitaxel-eluting TAXUS stents versus otherwise identical bare metal stents.

More than 120 national and international interventional cardiology centers participated in the trial.

The results of the trial were presented at the 20th annual Transcatheter Cardiovascular Therapeutics (TCT) scientific symposium.

Source: ANI
RAS/SK
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