P1441The characteristics of superior vena cava isolation, which is useful to avoid procedural complications: the findings obtained from high- resolution substrate mapping. (20th June 2017) - Yoshizawa, R.; Kuroki, K.; Hashimoto, N.; Yamagami, F.; Shinoda, Y.; Hattori, A.; Masuda, K.; Adachi, T.; Komatsu, Y.; Machino, T.; Yamasaki, H.; Sekiguchi, Y.; et al.