Tetralogy of Fallot Tetralogy of Fallot, Internal (AP view) GULL L丶E MHLALIGNMENT NYP ERTROP 1. Right ventricular outflow tract obstruction Small pulmonary artery valvular infundibular stenosis] 2. Overriding aorta. 3. Right ventricular hypertrophy 4. Large ventricular septal defect