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Studies of configuration of QRS wave of ventricular arrhythmia in coronary spasm Kazuya Fujino 1 , Yutaka Nakaya 1 , Toshiharu Niki 1 , Hiroyoshi Mori 1 , Toshihiro Maeda 2 , Takatoshi Ishida 2 , Yoshikazu Hiasa 2 , Tsukasa Aihara 2 1Second Department of Internal Medicine, School of Medicine, University of Tokushima 2Komatsushima Red Cross Hospital pp.365-370
Published Date 1985/3/15
DOI https://doi.org/10.11477/mf.1404204628

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  • Abstract
  • Look Inside

The features of ventricular arrhythmia in coro-nary spasm induced by ergonovine were examined in order to elucidate the characteristics of ventricu-lar arrhythmia in acute myocardial ischemia.

One important finding in our study was that the coupling intervals and configurations of QRS wave of the ventricular premature beats (VPBs) varied very much even in the same case and in the same time phase.

Prematurity index (R-R'/QR) of VPBs with right bundle branch block (RBBB) pattern was significantly smaller than that of the left bundle branch block (LBBB) pattern. Vulnerability index (R-R×QT/R-R') of VPBs with RBBB pattern was significantly larger than that of the LBBB pattern. Incidence of VPBs with RBBB pattern (50.9%) was slightly larger than that of the LBBB pattern (40.5 %). VPBs with RBBB pattern developed to ventri-cular tachycardias (VTs) in 29 out of 117 cases (24.8%) and VPBs with LBBB pattern developed to VTs in 11 out of 94 cases (11.7%). So it was considered that the VPBs with RBBB pattern more easily developed to VTs than those with LBBB pattern. But it is difficult to assess the clinical signi-ficance of VPBs from their QRS morphology alone, because 11 out of 40 VTs (27.5%) were initiated by VPBs with LBBB pattern.


Copyright © 1985, 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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