Anomalous Connection of Superior Vena Cava to Left Atrium-A Rare Congenital Cardiac Anomaly and Its Implications.

Exclusive drainage of superior vena cava (SVC) into the left atrium (LA) is one of the rare causes of right-to-left connection. Usually, this anomaly occurs in association with other cardiac defects, and is diagnosed in early childhood. But if it remains an isolated anomaly, this connection may be underdiagnosed and could lead to systemic manifestations.