Reinitiation of Ventricular Macroreentry within the His-Purkinje System by Back-Up Ventricular Pacing—A Mechanism of Ventricular Tachycardia Storm. - REITHMANN, CHRISTOPHER; HAHNEFELD, ANTON; OVERSOHL, NICO; ULBRICH, MICHAEL; REMP, THOMAS; STEINBECK, GERHARD (Pacing & Clinical Electrophysiology, 2007)