Aortic Stenosis
Aortic Valve Stenosis Aortic valve stenosis or aortic stenosis is a disease that affects the aortic valve, which is one of four valves within the heart. Usually, the valves help pump blood through the heart via tissue leaflets that open and close with each heartbeat. The leaflets make sure blood flows in the right direction through the heart’s four chambers and the rest of the body. Aortic stenosis occurs when the aortic valve's leaflets stiffen and cannot open or close completely.