One in seven patients who did not display risk factors suggestive of heart disease died after experiencing a heart attack compared with 1 in 28 with five risk factors, according to a study in the Journal of the American Medical Association. The survival of patients with more risk factors might be due to medications they took, researchers said. The findings were based on data from a national registry of nearly 550,000 first-time heart attack cases from 1994 to 2006.

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