t ventricular tachycardia. *J Am Coll Cardiol*. 0000;00:0000--00.  S0.0.0.0. Crawford T, Mueller G, Good E, et al. Ventricular arrhythmias originating from papillary muscles in the right ventricle. *Heart Rhythm*. 0000;0:000--00.  S0.0.0.0. Yamada T, McElderry HT, Okada T, et al. Idiopathic focal ventricular arrhythmias originating from the anterior papillary muscle in the left ventricle. *J Cardiovasc Electrophysiol*. 0000;00:000--00.  S0.0.0.