changes in the electrophysiologic properties of the substrate of ventricular tachycardia , either spontaneously with time or induced by ischemia or antiarrhythmic drugs , can contribute to the clinical occurrence of sustained ventricular arrhythmias in patients with an old myocardial infarction .
C0042514
ventricular tachycardia
C0085612
ventricular arrhythmias