Catheter ablation for verapamil-sensitive fascicular ventricular tachycardia guided by precise mapping using a multi-spline duodecapolar catheter with small electrodes and close spacings

The Purkinje fiber network serves as an arrhythmogenic substrate for idiopathic ventricular tachycardia.1 While catheter ablation can be an effective therapy for Purkinje-related arrhythmias, detection of the critical site by mapping the Purkinje fiber network is required to successfully treat them. We report a case of verapamil-sensitive left-posterior fascicular ventricular tachycardia (F-VT) successfully treated with catheter ablation guided by a precise mapping using a PentaRay catheter.