Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Instead of empyting into the left atrium, the pulmonary veins empty into the right atrium.
In TAPVR the blood can go from the retrocardiac common pulmonary vein to 3 places:
Supracardiac TAPVR rarely has obstruction and is associated with an obligatory right to left shunt at the atrial level via a patent foramen ovale or ASD.
Significant shunt vascularity and features resembling a large ASD are normally seen. In older children a"snowman" configuration to the mediastinum is due to the vertical vein and the dilated superior vena cava.
See References Chapter.
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