Pulmonary atresia (Pulmonary atresia - intact ventricular septum, PA/IVS)

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Pulmonary atresia

Alternate Names : Pulmonary atresia - intact ventricular septum, PA/IVS

Definition

Pulmonary atresia is a form of congenital heart disease in which the pulmonary valve does not form properly. The pulmonary valve is an opening on the right side of the heart that regulates blood flow from the right ventricle (right side pumping chamber) to the lungs.

In pulmonary atresia, a solid sheet of tissue forms where the valve opening should be, and the valve remains closed. Because of this defect, blood from the right side of the heart cannot go to the lungs to pick up oxygen.

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Heart, section through the middle

Heart, front view

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