Impact of Electrode Sequence Adjustment on Pacing Voltage Threshold During Transesophageal Cardiac Electrophysiological Examination
SONG Huanhuan
CHEN Xiaomin
XING Zuoying
XIE Sixin
LI Zhongjie
SUN Xinghua
WANG Yongxia
Abstract：Objective To investigate the effects of esophageal electrode catheter sequence adjustment(including in-terelectrode spacing and electrode polarity)on pacing voltage threshold during transesophageal cardiac electrophysiological examination.Methods Forty-six patients with pacing voltage thresholds exceeding 15 V undergoing transesophageal car-diac electrophysiological examination at the authors' hospital were randomly selected.Pacing voltage thresholds were sys-tematically analyzed through adjustments of interelectrode spacing and electrode polarity.Results Standard electrode con-nections were maintained:the red alligator clip was connected to the positive stimulation pole,the black clip to the nega-tive stimulation pole,and white clips to the mapping electrodes.Voltage reduction of 2-16 V was achieved in 42 cases through optimized electrode sequence adjustment.The optimal electrode sequences were identified as follows:red-white-black-white(38.10％),black-white-red-white(30.95％),red-black-white-white(19.05％),black-red-white-white(4.76％),red-white-white-black(4.76％)and black-white-white-red(2.38％).Conclusion Pacing voltage threshold demonstrates significant correlation with interelectrode spacing,optimal thresholds are obtained when connecting stimula-tion electrodes to poles 1 and 3.Electrode polarity shows minimal influence on thresholds when spacing remains constant.This methodology enables 2-16 V pacing voltage reduction,substantially enhancing procedural comfort and promoting clinical adoption of transesophageal cardiac electrophysiological examination.
Keywords：Transesophageal cardiac electrophysiological examinationElectrode sequenceInterelectrode spacingElectrode polarityPacing thresholdComfort
Publication Date：2025-04-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 298-301 )