Right pulmonary artery-to-left atrium communication: a rare cause of systemic cyanosis.

Direct communication between the right pulmonary artery and the left atrium is a rare congenital vascular malformation. The clinical diagnosis is difficult, and preoperative angiography is essential. We treated this anomaly successfully with surgery and the use of cardiopulmonary bypass in an 11-year-old boy. Surgery provides a complete cure for this anomaly.