Ventricular tachycardia (VT) results in significant morbidity, and in patients with structural heart disease (SHD) (including prior myocardial infarction) is associated with increased risk of sudden cardiac death (SCD).1 2 In myocardial infarction survivors the risk of SCD can be reduced with implantable cardioverter defibrillator (ICD) implantation.3 While ICDs are effective in terminating VT and aborting SCD, they do not prevent ventricular arrhythmias. Given that ICD shocks are associated with reduced quality of life and increased mortality,4 strategies are sought to prevent VT and minimise shocks...