Large subaortic VSD with aortic override – echocardiogram, seen from the parasternal long axis view. VSD: ventricular septal defect; IVS: interventricular septum; LV: left ventricle; AML: anterior mitral leaflet; LA: left atrium; Ao: aorta; Ao valve: aortic valve; RV: right ventricle. Such large subaortic VSD with aortic override can be seen in tetralogy of Fallot (TOF) and double outlet right ventricle. Pulmonary atresia with subaortic VSD, which can be considered as an extreme variant of TOF can also have a similar picture on parasternal long axis view. A similar appearance can be seen with the subtruncal VSD in truncus arteriousus.