Common types of congenital heart defects – Children’s Health

The most common congenital heart defect is a bicuspid aortic valve (BAV). The aortic valve opens and shuts to allow blood flow from the heart to the aorta. The aorta is the major blood vessel bringing oxygen-rich blood to the body. This defect occurs when there are only two leaflets instead of three within the valve.

https://www.childrens.com/health-wellness/common-types-of-congenital-heart-defects