Open AccessShortening of intraventricular conduction time with rapid ventricular pacing
Author(s) -
Sasaki Naoko,
Watanabe Ichiro,
Okumura Yasuo,
Sonoda Kazumasa,
Kogawa Rikitake,
Takahashi Keiko,
Ohkubo Kimie,
Nakai Toshiko,
Hirayama Atsushi
Publication year - 2014
Publication title -
journal of arrhythmia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.463
H-Index - 21
eISSN - 1883-2148
pISSN - 1880-4276
DOI - 10.1016/j.joa.2013.10.005
Subject(s) - medicine , qrs complex , cardiology , endocardium , ventricular pacing , intraventricular conduction , ablation , supraventricular arrhythmia , anesthesia , heart failure , atrial fibrillation
Background Supernormal conduction (SNC) of the human ventricular myocardium has been reported, but its mechanism remains controversial. Methods We recorded monophasic action potentials during rapid ventricular pacing from the right ventricular endocardium in 24 patients with supraventricular tachyarrhythmias who underwent catheter ablation. Results In 7 of 24 patients, shortening of the QRS duration was observed at a pacing cycle length ≤400 ms and lengthening of the QRS duration was observed in 3. Conclusions Shortening of the QRS duration during rapid ventricular pacing was observed in the patients.