aortic stenosis

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Narrowing of the opening of the aortic valve due to fusion of the cusps that comprise the valve. It may result from previous rheumatic fever, or from calcification and scarring in a valve that has two cusps instead of the normal three, or it may be congenital. Aortic stenosis obstructs the flow of blood from the left ventricle to the aorta during systole. Breathlessness on effort, angina pectoris, and fainting may follow. The patient has a systolic murmur. When symptoms develop the valve should be replaced surgically with a mechanical or biological prosthesis.

Subjects: Medicine and Health.

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