bicuspid aortic valve
Bicuspid aortic valve is most commonly a congenital heart defect in which the aortic valve (valve between the left ventricle and the aorta) has only two flaps (cusps or leaflets) instead of the normal three. Because of this, patients with a bicuspid valve may develop a narrowed or leaking aortic valve. Narrowing or leakage do not necessarily develop in childhood, but may occur in adulthood. This sometimes requires surgical repair.
