Why the study?
Can QRST isointegral maps from 87-point body surface ECGs diagnose old anterior myocardial infarction and estimate left ventricular ejection fraction?
Can QRST isointegral maps from 87-point body surface ECGs diagnose old anterior myocardial infarction and estimate left ventricular ejection fraction?
QRST isointegral mapping and subtraction indices from body surface ECGs correlate with left ventricular ejection fraction and can serve as a simple clinical method for evaluating old anterior myocardial infarction.
May aid noninvasive LVEF estimation in old anterior MI; leaves open prospective validation before clinical adoption.
体表面87点の単極誘導心電図から求めた, QRST isointegral map (I-map)と, QRST subtraction I-mapにより,前壁梗塞の診断および左室駆出率の推定を行なった.対象は陳旧性前壁梗塞47例であり,健常成人46例を正常対照群とした.前壁梗塞のQRST I-mapでは負領域が左胸部に張り出し,極大および極小の位置が健常人に比して有意に左下方に偏位した.またQRST subtraction I-mapにおけるn subtraction, ∑ subtraction, ∑ DIの指標は駆出率と比較的良い負相関を示した.また梗塞例の標準12誘導心電図V4誘導におけるQRST積分値と正常のそれとの差も駆出率と負相関を示し,簡便な方法として臨床応用が可能と考えられた.
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Hayashi et al. (1987) studied this question.
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