A 9-year-old boy with patent ductus arteriosus complicated by infective endocarditis had not responded to antibiotic therapy and was referred to our institution. He had persistent fever and a chest roentgenogram demonstrated the presence of left lung pneumonic consolidation. An echocardiogram showed the presence of large vegetation in the pulmonary artery at the ductal opening. We successfully performed an open ductal ligation with the aid of cardiopulmonary bypass through a sternotomy and proceeded to resect the vegetation. We completed the procedure with reconstruction of the pulmonary artery. The postoperative course was uneventful. The patient was discharged after a week.