Haşim Olgun1, Mehmet Karacan1, Naci Ceviz1, Hikmet Koçak2. 1. Atatürk University, Faculty of Medicine, Department of Pediatrics, Division of Pediatric Cardiology, Erzurum, Turkey. 2. Atatürk University, Faculty of Medicine, Department of Cardiovascular Surgery, Erzurum, Turkey.