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Type I Total Anomalous Pulmonary Venous Return
Definition 1
Total anomalous pulmonary venous return in which the pulmonary veins drain into the right atrium via the superior vena cava. (NCI Thesaurus)
Definition 2
Total Anomalous Pulmonary Venous Return (TAPVR) is a rare congenital malformation in which all four pulmonary veins do not connect normally to the left atrium, but instead drain abnormally to the right atrium by way of an abnormal (anomalous) connection. In type 1, supracardiac TAPVR, the pulmonary veins drain to the right atrium via the superior vena cava. In this type of TAPVR, the pulmonary veins come together behind the heart and then drain upwards to an abnormal vertical vein. This vein joins the innominate vein which connects to the right superior vena cava and drains to the right atrium. (NICHD)
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