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目的通过统计陈旧性心肌梗死患者各心电图指标的发生情况,探讨fQRS对陈旧性心肌梗死的诊断价值。方法选择352例陈旧性心肌梗死患者进行心电图检查,根据QRS形态,分为病理性Q波、fQRS、病理性Q波和(或)fQRS,又根据心肌梗死的不同部位进行心电图指标的统计分析。结果 352例陈旧性心肌梗死患者心电图有病理性Q波者117例,有fQRS者184例,有病理性Q波和(或)fQRS者226例。对陈旧性心肌梗死诊断的敏感性中,病理性Q波31.8%,fQRS46.6%,病理性Q波和(或)fQRS58.2%。对陈旧性心肌梗死诊断的特异性中,病理性Q波96.4%,fQRS85.4%,病理性Q波和(或)fQRS84.7%。结论 fQRS诊断陈旧性心肌梗死的敏感性高于病理性Q波,但诊断特异性低于病理性Q波,较病理性Q波有较高的阴性预测值。两者结合有更高的敏感性和阴性预测值。fQRS对陈旧性心肌梗死有明确的诊断价值。
Objective To evaluate the diagnostic value of fQRS in the diagnosis of old myocardial infarction (AMI) by counting the occurrence of ECGs in patients with old myocardial infarction. Methods 352 patients with old myocardial infarction were selected for electrocardiogram examination. According to QRS morphology, they were divided into pathological Q wave, fQRS, pathological Q wave and / or fQRS. Statistical analysis of ECG indexes was performed according to different parts of myocardial infarction. Results There were 117 cases with pathological Q wave in 352 patients with old myocardial infarction, 184 patients with fQRS, 226 patients with pathologic Q wave and / or fQRS. The sensitivity of the diagnosis of old myocardial infarction, pathological Q wave 31.8%, fQRS46.6%, pathological Q wave and (or) fQRS58.2%. The specificity of the diagnosis of old myocardial infarction, pathological Q wave 96.4%, fQRS85.4%, pathological Q wave and (or) fQRS84.7%. Conclusions The sensitivity of fQRS in diagnosing old myocardial infarction is higher than that of pathological Q wave, but its diagnostic specificity is lower than that of pathological Q wave, which has a higher negative predictive value than pathological Q wave. Both combine with higher sensitivity and negative predictive value. fQRS has a clear diagnostic value of the old myocardial infarction.