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KMID : 0351819980390020125
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Kyunpook University Medical Journal
1998 Volume.39 No. 2 p.125 ~ p.131
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Significance of T-wave Inversion in Precordial Leads
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Kwack Dong-Hoon
Bae Ho-Sang
Jun Jae-Eun
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Abstract
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To evaluate the significance of T wave inversion without ST segment abnormality or abnormal Q wave, we retrospectively studied 35 patients admitted for acute chest pain with T wave inversion without ST segment abnormality or abnormal Q wave. The patients were divided into three groups according to the depth and´, the localization of symmetric T wave inversions: First, shallow group (n=16) had negative T waves below 0.5 mV in the precordial lead, second deep anterior symmetric group (n=14) had negative T waves above 0.5 mV in the anterior precordial leads (Vl-3), and third, deep lateral symmetric group (n=5) had negative T waves above 0.5 mV in the lateral precordial leads (V4-6). The three groups had similar baseline clinical characteristics. In deep anterior symmetric T wave inversion group, the 10 patients (71%) were unstable angina or non-Q infarction, in deep lateral symmetric T wave inversion group, the 3 patients (60%) were stable angina or atypical chest pain, and then in shallow T wave inversion group the 7 patients (44%) were stable angina or atypical chest pain. But there were no significant differences (p=0.4298) statistically.
The 30 patients underwent angiographic evaluations. In the 16 diseased vessels in deep anterior symmetric T wave inversion group, the 7 diseased vessels(44%) had the stenosis(>50%) in the left main and the proximal left anterior descending coronary artery. In the 12 diseased vessels in shallow T wave inversion groups, only 1 diseased vessel(8%) had the stenosis in the left main and the proximal left anterior descending coronary artery. and there were significant differences (p=0.0483) statistically.
In concussion, if there are the deep symmetric T wave inversions in the anterior precordial leads, there will be the significant stenosis in the proximal left anterior descending artery or left main coronary artery.
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KEYWORD
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T-wave inversion, Precordial lead, non-Q infarction, unstable angina
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