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Definition of Aortic atresia

Aortic atresia: Congenital absence of the normal valvular opening from the left ventricle of the heart into the aorta.

Atresia here refers to the absence of a normal opening.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=16253
Last Editorial Review: 6/14/2012

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