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Genetic Mutations Raise Heart Rhythm Problem Risk  
7/2/2007 12:38:23 AM

WASHINGTON (Reuters) - Two genetic mutations have been identified that increase the risk of a common heart rhythm problem linked to stroke, according to researchers who have developed a test to identify people who have them. Writing on Sunday in the journal Nature, scientists scanned the genes of thousands of people from Iceland, Sweden, the United States and Hong Kong to find these two common mutations tied to much higher risk for atrial fibrillation.
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