Ventricular tachycardia (VT) occurs in up to 59% of patients with left ventricular assist devices (LVAD). In some of these patients, the VT cannot be managed medically or by implantable cardioverter-defibrillator. In this case, a 66-year-old male was successfully treated with radiofrequency ablation of intractable VT that developed months after implantation of an LVAD (Heartware). The LVAD provided haemodynamical support during mapping and did not interfere with the ablation.