An interrupted aortic arch is a rare heart defect. The aortic arch is part of the major blood vessel that helps move blood from the heart to the rest of the body. With this defect, the aortic arch is interrupted or incomplete. Blood cannot flow through it normally. This makes blood flow to the body less efficient. Children with this defect may also have a hole in the wall between the right and left chambers in the heart.

Heart Chambers and Valves
heart anatomy
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Blood Flow Through the Heart
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A direct cause is not known. The defect develops in the fifth to seventh week of fetal growth. The child is born with the condition.