Partial anomalous pulmonary venous connection other imaging findings

Volume overload of the right heart caused by an abnormal link between a pulmonary vein and a systemic vein will have physiological effects resembling those of an ASD. However, anomalous pulmonary venous connection differs from related ASD in that there is no chance for right-to-left shunting, and the severity of the left-to-right shunt is not increased by the onset of acquired left heart disease. The right upper pulmonary vein’s connection to the superior vena cava, which may be accompanied by a sinus venosus defect, is the most frequent aberrant pulmonary venous connection.