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Introduction This chapter considers abnormalities of the pulmonary veins, in particular their anomalous connections to the systemic venous system. The variant of partially anomalous pulmonary venous connection associated with the sinus venosus interatrial communication is described in detail. The anomalous…

Etiology Normal embryologic development of the pulmonary venous system involves creation of a connection between the left atrium and the pulmonary venous plexus, and subsequent regression of systemic-to-pulmonary venous connections. Inappropriate connection of the pulmonary venous system to the systemic…