SENEWS-2007-06-13 Report
Health Report
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This the VOA Special English Health Report.
Today we have a second half of a report about some concerns with the use of drug treated corn any stands. These are small metal tools designed be placed inside ardaries in heart patients. The spent is usually left in permanently have the doctors clean out a narrowed ardary with angel plastic treatment. Doctors expand the spand to hold the passege open. so blood can flow normally to the heart. Medicine on the stand is realeased slowly over time to start the development of scartissue. Scartissue can cause the ardary to become narrow again.
Views the devices have been appoved in the United States for the past four years. For patients with simple blockage and no history of a heart attack. But some doctors use drug a routine stands as they are called for patients with more serious heart problems. This is known as off-label use and is permitted. But to recent studies questioned the safety of off-label use of drug treated stands. Both found that some patients would more serious conditions were likely to suffer a renarrowing of the ardary.
This is called rest knowsis. So far, researchers have mostly investigated the stands themselves and how they are made. But now attention is turning also to the way they are been used. The question is how much of the problem of stand failure may be the result of stands not been put in right, or maybe they are been expanded enough to feed firmly in the ardary.
One recent study found that stands were incorrectly placed in almost 70% of the patients in next study. Now a heart research organization hopes to solve the mistory. The cardial vescued research foundation is a big support of the use of drug treated stands. The foundation is going to carry out a large study. Spokeswoman O* D* says it will involve 11,000 patients at ten centers in the United States and tow in Germany. A heart doctor with the foundation would be one of the leader investigates.
Researchers will exam how doctors in plant and expand stand and how the methods they used might affect outcomes. The study will view a special with serious ardary blockages that been found a year or more after a stand with put in place.
And that's VOA Special English Health Report written by Katty Weaver, The first part of our report can be found in voaspecialenglish.com. I'm Catherine Kohl.