Tetralogy of Fallot Tetralogy of Fallot with pulmonary stenosis 2012-04-10T07:44:06Z SNOMEDCT_US:253512000 HP:0011679 The commonest form of tetralogy of Fallot characterized by pulmonary stenosis, overriding aorta, ventricular septum defect, and right ventricular hypertrophy, without pulmonary atresia, absent pulmonary valve, atrioventricular canal defect or absent subarterial conus. UMLS:C0344881