torsades de pointes ( multiform ) ventricular tachycardia ( vt ) accompanied by prolongation of the qt interval can be caused by class ia and class iii antiarrhythmic drugs as well as other drugs that bind to the membrane sodium channels of ventricular cells , for example , tricyclic antidepressants .
C0040479
torsades de pointes
C0042514
ventricular tachycardia