Aortic valve stenosis

Aortic valve stenosis is a thickening and narrowing of the valve between the heart's main pumping chamber and the body's main artery, called the aorta. The narrowing creates a smaller opening for blood to pass through. This reduces or blocks blood flow from the heart to the rest of the body. Typically the aortic valve has three cusps, called a tricuspid aortic valve. But some people are born with an aortic valve that has two cusps, a condition called bicuspid aortic valve.