What is ​Pulmonary Atresia (PA)?

Also known as: PA.

Pulmonary atresia is a birth defect of the heart where the valve that controls the flow of blood from the right side of the heart to the lungs does not form, preventing blood picking up oxygen.

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Reviewed by: Jack Wolfsdorf, MD, FAAP

This page was last updated on: 1/29/2019 3:21:13 PM