Reversal of Pulmonary Arteriovenous Malformation After Diversion of Anomalous Hepatic Drainage

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Pulmonary arteriovenous malformation can occur in up to 25% of patients after a classic Glenn shunt. Although unproven, exclusion of hepatic venous blood from the lungs has been proposed as a possible cause. We present a patient born with anomalous hepatic venous drainage into the left atrium with an intact atrial septum in whom pulmonary arteriovenous malformation developed in childhood. This was reversed after diversion of the hepatic venous drainage to the right atrium, supporting exclusion of hepatic venous flow as the cause of pulmonary arteriovenous malformation. The association with the hepatopulmonary syndrome is discussed.

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