QRS波群等电位图对陈旧性心肌梗死的诊断价值

为探讨QRS波群等电位对陈旧性心肌梗死的诊断价值,分析陈旧性心肌梗死36例、非心肌梗死168例QRS波群等电位图。结果显示:陈旧性心肌梗死组与非心肌梗死组在心室除极早期负电位的分布各具特征性。两组间的逆转时刻、负电位占据前胸时刻及最小值差异有显著意义(P<0.05)。QRS波群等电位图对心肌梗死诊断的敏感性、特异性分别为:前壁100％、98％;前间壁50％、100％;下壁90％、98.9％。认为QRS波群等电位图对诊断陈旧性心肌梗死有重要价值。

Value of QRS isopotential map in diagnosis of old myocardial infarction

In order to explore value of QRS isopotential map in diagnosis of old myocardial infarction, QRS isopo-tential map was recorded in 36 patients with old my-ocardial infarction and 168 subjects without myocardial infarction. Results showed that infarction group and non-infarction group had theirs own characteristics in distribution of negative potentials on QRS isopotential map during early depolarization. Differences of reverse time, negative potential occupying anterior thora time and minimum difference were of prominant statistical significances between two groups ( P < 0. 05 ). Its sensitivity and specificity in diagnosis of old myocardial infarction were 100%, 98% in anterior; were 50%, 100% in anteroseptal; were 90%, 98. 9% in inferior. Our experiment indicated that QRS isopotential map in diagnosis of old myocardial infarction was very valuable.