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Frequency Dependent Prolongation of Inter-Atrial Conduction Time by Mexiletine in Human Atrium Ryuta Sakai 1 , Daisuke Inoue 1 , Kazuya Ishibashi 1 , Miho Inoue 1 , Itsuki Omori 1 , Yasuhiro Yamahara 1 , Jun Asayama 1 , Masao Nakagawa 1 1Second Department of Medicine, Kyoto Prefectural University of Medicine Keyword: ヒト心房筋 , メキシレチン , 使用依存性ブロック , human atrium , mexiletine , use dependent block pp.987-991
Published Date 1993/10/15
DOI https://doi.org/10.11477/mf.1404900751
  • Abstract
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To investigate frequency dependent conduction slow-ing by mexiletine in the human atrium, we examined inter-atrial conduction time (TACT) at different stimu-lation frequencies (100/min to 220/min) in 13 patients with paroxysmal atrial fibrillation (Paf) and 7 patients without Paf. IACT was prolonged as the stimulation frequency was increased, and either before or after mexiletine administration IACT was longer in the Paf group (max 114±9msec, p<0.01, mean±SD) at any stimulation frequency than in the non-Paf group (max 100±8msec).


Copyright © 1993, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院

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