Electorocardiographic evaluation of left ventricular function in acute myocardial infarction Eiji Kinosita 1 , Nariaki Kanemoto 1 , Chiemi Imaoka 1 , Michiru Ide 1 , Yuichirou Goto 1 , Yutaka Suzuki 2 11st Department of Internal Medicine, Tokai University 2Department of Radiology, Tokai University pp.1297-1302
Published Date 1986/12/15
DOI https://doi.org/10.11477/mf.1404204974
  • Abstract
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The object of this study is to evaluate left ventricular function in patients with acute myocardial infarction (AMI) by 12 lead electorocardiography (ECG). The subject of this study was 84 patients with definite transmural AMI diagnosed from typical chest pain, elevation of serum CPK (MB), and evolutional ECG changes. There were 66 men and 18 women with mean age of 60. These patients were devided into subgroups according to the location of AMI : anterior=group A and inferior=group I and the presence or absence of heart failure: group F and group N, res-pectively. Eight parameters seemed suggesting the size of AMI (4th day after attack) served for this study : ECG scoring system proposed by Palmeri (QRS score, New Eng J Med 1982), sum of Rwave proposed by Askezani (ΣR, Am J Med 1978), sum of amplitude and duration of Q wave (ΣQ, DQ), ST elevation (ΣE), and ST depression (ΣD), and number of coronary T wave and Q vaves (NT, NQ). These parameters were compared with left ventricular ejec-tion fraction (LVEF) obtained from ECG gated equi-librium radionuclide ventriculography (RNVG). Sig-nificant positive relationship was noted among LVEF and QRS score (all groups), NQ (group A, group N), ΣR (group N), ΣD (group I), (each p<0. 001). Especially, close correlation was noted between LVEF and QRS score; r=0.63 with group A, r=-0.77 with group I, r=-0.77 with group N and r=-0.61 with group F (each p<O.001). Moreover QRS score≧ 5 suggesting LVEF<35% and in group A and ER<5 indicating LVEF <45%. In conclusion, QRS score is a noninvasive and useful parameter estimating left ventricular function at the bedside of patients with AMI.

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


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