ANOMALOUS PULMONARY VENOUS DRAINAGE OF THE RIGHT LUNG INTO THE INFERIOR VENA CAVA

Abstract
Five patients with anomalous pulmonary venous drainage of the right lung into the suprahepatic portion of the inferior vena cava have been presented. Associated anomalies may include agenesis of a part of the right lung, atrial septal defect, systemic arterial supply to the right lung, and dextroposition of the heart. Discussion of the character of the second heart sound in patients with partial anomalous pulmonary venous drainage and an intact atrial septum is presented. Normal splitting of the second sound in a patient who has findings otherwise consistent with an atrial septal defect should suggest consideration of anomalous pulmonary venous drainage.