1682Notched-R pattern in V5R is a sign of difficulty during radiofrequency catheter ablation of ventricular arrhythmias originating from the ventricular outflow tract. (20th June 2017) - Igarashi, M.; Nogami, A.; Watanabe, T.; Hamaya, R.; Ichijo, S.; Yamao, K.; Kajiyama, T.; Kusa, S.; Miyazaki, S.; Nakamura, H.; Hachiya, H.; Aonuma, K.; et al.