Ventricular tachycardia (VT) occurs in the diseased heart as well as in the normal heart but it is not always easy to distinguish. Ventricular tachycardias in the morphologically normal ventricle include idiopahic (fascicular) left ventricular tachycardia and out-flow-tract tachycardia from the right ventricular outflow tract (RVOT) or left ventricular outflow tract (LVOT), whereas VT in diseased heart comprises stable and unstable VT in post-infarction ventricle, VT in dilated cardiomyopathy, VT in arrhythmogenic right ventricular cardiomyopathy, and bundle branch re-entry
