Aortic valve stenosis

Aortic valve stenosis causes a thickening and narrowing of the valve between the heart's main pumping chamber (left ventricle) and the body's main artery (aorta). The narrowing creates a smaller opening for blood to pass through. Blood flow from the heart to the rest of the body is reduced or blocked. Typically, the aortic valve has three cusps (tricuspid aortic valve), but some people are born with an aortic valve that has two cusps (bicuspid aortic valve).