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2. Causes

The most common cause of aortic stenosis is a build-up of calcium forming on the valve. The blood naturally contains calcium, which can account for the stiffening. However, some cases of aortic stenosis stem from a congenital heart defect called a bicuspid aortic valve. In addition, a previous bout of rheumatic fever can lead to the condition, as can radiation therapy.

10 Key Facts about Aortic Stenosis

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