A new American Heart Association study published Monday has found that children under age three who have had certain heart birth defects or heart surgery in the past six months may have an increased risk of heart infection.

Canadian researchers looked at data on 47,518 children with heart defects between 1988 and 2010. They found that for every 1,000 children, about 6.1 had a heart infection by the time they were 18 years old. But they also found that children with certain types of heart defects had a significantly higher risk of developing a heart infection.

The study was published in today’s Circulation: Journal of the American Heart Association.

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