Anomalous drainage of some or all of the pulmonary veins into the right side of the heart is a well-recognized pathological and clinical entity. Healey (1952) collected from the literature 144 cases and added three of his own. Excellent reports on the clinical features and the findings on cardiac catheterization and angiocardiography have been published by Snellen and Albers (1952), Gardner andOram (1953), and Whitaker (1954