Tasuku Yamamoto, Masateru Takigawa, Takatoshi Shigeta, Claire A Martin, Junji Yamaguchi, Miki Amemiya, Takashi Ikenouchi, Miho Negishi, Iwanari Kawamura, Kentaro Goto, Takuro Nishimura, Tomomasa Takamiya, Susumu Tao, Shinsuke Miyazaki, Masahiko Goya, Tetsuo Sasano
BACKGROUND: Unipolar electrograms (Uni-EGM) are an essential part of intracardiac mapping. Although Wilson Central Terminal (WCT) is conventionally used as a reference for signals, avoiding contamination by far-field and non-physiological signals is challenging. OBJECTIVE: To explore the impact of an intracardiac indifferent reference electrode close to the recording electrodes, in lieu of WCT, on electrograms. METHODS: Sinus node activation was mapped in patients undergoing catheter ablation, using a multielectrode array with a close indifferent electrode (CIE) embedded in the distal end of the catheter shaft...
March 7, 2024: Heart Rhythm: the Official Journal of the Heart Rhythm Society