Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Aortic valve stenosis

Aortic valve stenosis is a narrowing of the aortic valve between the lower left chamber of the heart and the aorta, which supplies blood to the body. A narrowed aortic valve forces the lower left chamber of the heart to pump harder to get enough blood through the valve.

Aortic valve stenosis can be caused by a structural problem called bicuspid aortic valve, which develops before a baby is born (congenital heart defect). In these cases, the valve has only two flaps, or leaflets, instead of the normal three.

Aortic valve stenosis also occurs as a person ages and the valve becomes hard and thick from calcium buildup. Most cases of aortic valve stenosis caused by calcium buildup occur in people who are older than 65.

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