Clinical significance of the disappearance of septal Q waves after the onset of myocardial infarction: Correlation with location of responsible coronary lesions

We investigated the relationship between the disappearance of septal Q waves after myocardial infarction (MI) and the location of the culprit lesion. We studied 82 patients following their first anteroseptal MI who had an electrocardiogram performed before the MI. Septal Q waves were detectable befo...

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Bibliographic Details
Published in:Journal of electrocardiology 1999, Vol.32 (1), p.15-20
Main Authors: Yotsukura, Masayuki, Toyofuku, Mina, Tajino, Kazuhiro, Yoshino, Hideaki, Ishikawa, Kyozo
Format: Article
Language:English
Subjects:
Adult
Aged
Biological and medical sciences
Cardiology. Vascular system
Cineangiography
Coronary Angiography
Coronary heart disease
Electrocardiography
Female
Follow-Up Studies
Heart
Humans
left anterior descending artery
Male
Medical sciences
Middle Aged
myocardial infarction
Myocardial Infarction - diagnostic imaging
Myocardial Infarction - physiopathology
Prognosis
Reproducibility of Results
Retrospective Studies
Sensitivity and Specificity
septal Q wave
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Summary:We investigated the relationship between the disappearance of septal Q waves after myocardial infarction (MI) and the location of the culprit lesion. We studied 82 patients following their first anteroseptal MI who had an electrocardiogram performed before the MI. Septal Q waves were detectable before MI in 56 patients and disappeared after MI in 17 of those patients. The culprit lesion was located proximal to the origin of the first septal branch (S1) in 13 patients (76%). Disappearance of septal Q waves following MI predicted that the culprit lesion was proximal to the origin of S1 (sensitivity, 42%; specificity, 84%; predictive value, 76%; and accuracy, 61%). If septal Q waves that were detected before MI disappeared after MI, the culprit lesion was located proximal to the origin of S1 in 76% of the patients. This finding may be clinically useful in caring for patients following MI.
ISSN:0022-0736
1532-8430
DOI:10.1016/S0022-0736(99)90017-1