PE-004 Characterization of Bipolar Electrograms during Sinus Rhythm at the Site where Complex Fractionated Atrial Electrogram is Recorded during Atrial Fibrillation(PE001,Atrial/Supraventricular Arrhythmia (Clinical/Treatment) 1 (A),Poster Session (English),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)