Assertion: congenital aortic stenosis | /r/HasProperty | a congenital heart defect
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Source sentences:
text: Congenital aortic stenosis is a congenital heart defect involving the aortic valve (e.g., instead of having the normal three flaps, the valve only has one or two) that results in an incomplete opening of the valve, making it more difficult for the heart to pump blood to the body.