雑誌文献を検索します。書籍を検索する際には「書籍検索」を選択してください。

検索

書誌情報 詳細検索 by 医中誌

Japanese

A QRS scoring system using the Frank lead vectorcardiogram and its clinical evaluation Tsuneo Tsuya 1 1The Second Department of Internal Medicine, Kyorin University School of Medicine pp.991-997
Published Date 1986/9/15
DOI https://doi.org/10.11477/mf.1404204931
  • Abstract
  • Look Inside

In following myocardial infarction (MI), a QRS scoring system using the standard 12-lead electrocardio-gram (the ECG scoring system) is used as a method of estimating the left ventricular ejection fraction (LVEF). While this system may have its clinical usefu-lness, however, it does not show sufficiently high correla-tion with the LVEF, and so there is a limit to its practical utility.

The purpose of this study was therefore to try to improve the correlation with the LVEF by designing a QRS scoring system using the Frank lead vectorcardio-gram (a VCG scoring system), and to evaluate it clinically. In this VCG scoring system, for each lead the Q-R-S wave height, the R/S ratio, the Q/R ratio, the width of Q wave, and the Q-index were assigned points as parameters, and their sum total became the VCG score.

The subjects were 104 patients with MI, 3 to 6 months after they showed their first symptoms. The VCG scoring system showed good correlation with the LVEF, and moreover reproducibility was verified (r=-0.76, p< 0.001, [LVEF%]=70.5-3.1×[VCG score]). Furthe-rmore, a high standard for detecting abnormalities in the LVEF was achieved, with a VCG score≧7: sensiti-vity, specificity and predictive accuracy were 57.1%, 93.5% and 78.8%, respectively.

In the 96 cases for which the ECG and VCG were recorded simultaneously, the VCG score showed better correlation than the ECG score with the LVEF (r= -0.76 vs. r=-0.56). Therefore, it can be considered that the VCG scoring system is a useful method of esti-mating the LVEF from an electrocardiogram.


Copyright © 1986, Igaku-Shoin Ltd. All rights reserved.

基本情報

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

関連文献

もっと見る

文献を共有