If your child has an atrial septal defect, or ASD, he or she has a hole in the wall of the heart that separates its two upper chambers, the left and right atrium. The hole is formed when the heart wall, called the atrial septum, does not seal completely during a baby’s development. This condition is sometimes known as “a hole in the heart” in children. ASD in kids is a congenital heart defect, which means children are born with it.
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