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Your heart has four valves to keep blood flowing in the direction. These valves include the mitral valve, tricuspid valve, pulmonary valve and aortic valve. Each valve has flaps (epiphysis or leaflets) that opens and close once during each heartbeat sometimes the valve do not open or close completely; this interferes with the flow of blood inside the heart, and may lead to impaired ability to pump blood to your body. In aortic valve disease, the aortic valve between the lower left chamber (left ventricle) and the primary artery that delivers blood from the heart to the body (the aorta) does not work completely. It may not close completely; This causes blood to leak back into the left ventricle (regurgitation), or possibly narrowing of the valve (stenosis).