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Many Heart Attacks May Go Unrecognized in Seniors
Date:9/5/2012

By Steven Reinberg
HealthDay Reporter

TUESDAY, Sept. 4 (HealthDay News) -- Far more older people than thought may suffer heart attacks that are never diagnosed, a new study suggests.

These so-called "silent heart attacks" can increase the risk of dying as much as any confirmed heart attack does, the researchers added.

To reach their conclusion, the study authors used sophisticated MRI scans to spot heart trouble among more than 900 older Icelanders between the ages of 67 and 93.

"MRI scanners are really a spectacular tool for finding heart disease," explained lead researcher Dr. Andrew Arai, chief of the cardiovascular and pulmonary branch at the U.S. National Heart, Lung, and Blood Institute.

However, people shouldn't be running out to get scanned, he stressed: "I wouldn't recommend that. Most guidelines don't recommend having these expensive tests unless you are having symptoms."

Right now, it isn't clear when such scans are called for and who would benefit from them, Arai noted, although this latest finding is a first step toward determining that.

The report was published in the Sept. 5 issue of the Journal of the American Medical Association.

Among the more than 900 Icelanders studied, 91 had heart attacks that had been diagnosed, while 157 had heart attacks that had not been recognized before, the researchers found. Cardiac MRI detected more cases of unrecognized heart attack in people with diabetes (21 percent) than in those without diabetes (14 percent), the researchers added.

Over more than six years of follow-up, 33 percent of those who had recognized heart attacks died, as did 28 percent of those with unrecognized heart attacks, which was significantly more than the 17 percent who died among those who had never had a heart attack, the researchers noted.

Not surprisingly, significantly more people who had a recognized heart attack were taking beta blockers to l
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