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Mortality Risk Similar for Bypass Surgery and Latest Drug-Coated Stents

by Dr. Trupti Shirole on March 22, 2015 at 6:04 AM

Mortality Risk Similar for Bypass Surgery and Latest Drug-Coated Stents
Blocked coronary arteries are treated with stents or traditional bypass surgery. Stents are metal mesh tubes that are threaded into the heart through a leg or an arm artery using a catheter and are then expanded to keep a blocked coronary artery open indefinitely. Bypass surgery is an open-heart procedure that involves grafting of arteries or veins harvested from elsewhere in the body like the leg or the arm or from within the chest itself. Cardiologists at NYU Langone Medical Center have now revealed that newer drug-coated stents have similar long-term death rates compared with traditional bypass surgery for patients with more than one diseased coronary artery.

During the study, researchers studied 9,000 patients who underwent percutaneous coronary intervention (PCI) and received the latest stents coated with the drug everolimus to inhibit inflammation and scar tissue growth; compared to a matched sample of over 9,000 patients who underwent bypass surgery instead.
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Researchers found that the stent group fared better in the first 30 days, with only half the number of deaths and one-sixth the number of strokes seen in the bypass group. But in contrast to previous studies, the stent group did not seem to fare worse in the longer term. During the period from 30 days to about 3 years on average, the numbers of deaths in the two groups were not significantly different. Patients in the stent group got about 1.5 times the number of heart attacks long-term, compared to the bypass group. But, patients whose stents successfully opened all of their diseased arteries, there was no significant increase in heart attacks.

Dr. Sripal Bangalore, an associate professor in NYU Langone's Leon H. Charney Division of Cardiology, Department of Medicine, who was lead author of the study, said, "The key finding is that there was no greater mortality in the sample of patients receiving the latest generation stents. The gap in apparent mortality risk between bypass and PCI has been getting smaller and smaller as stent technologies have advanced."

The study was published in the New England Journal of Medicine.

Source: Newswise
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