Rare congenital fistula connection between right subclavian artery and superior vena cava presenting in neonate with congestive cardiac failure

Intra-thoracic arteriovenous malformations are uncommon. As the most reported localizations of AVM are the head (vein of Galen malformation), the abdomen (infantile hepatic hemangioma), the neck and extremities.1 Arterio venous malformation divided into congenital and acquired. The congenital forms are even more uncommon and patients present with variable symptoms that make the diagnosis more challenging.2,3 A congenital Aortocaval fistula from subclavian artery to the superior vena cava (SVC) may represent a subclass of this condition.