The patient had cyanotic congenital heart disease with underdeveloped subpulmonic infundibulum/pulmonary valve atresia and associated ventricular septal defect (VSD). The patient underwent modified Blalock-Taussig (BT) shunt procedure and VSD repair in infancy. The modified BT shunt procedure entails the use of  a synthetic graft, usually polytetrafluoroethylene, with anastamotic connection between the right subclacian artery and the right pulmonary artery.