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心电图诊断心肌梗塞的敏感性和特异性都有局限性。偶尔,急性心肌梗塞时可无心电图改变。心肌梗塞后,病理性 Q 波可减少或完全消失。甚至严重缺血性心肌病患者可能无异常 Q 波。此外,各种正常的变异使心电图的特异性减低,非梗塞性的异常状况可产生 Q 波和明显的 ST-T 改变,本文简要复习主要伪梗塞型心电图的鉴别诊断。
ECG sensitivity and specificity of myocardial infarction have limitations. Occasionally, ECG changes without acute myocardial infarction. After myocardial infarction, pathological Q wave can be reduced or completely disappear. Even patients with severe ischemic cardiomyopathy may have no abnormal Q waves. In addition, a variety of normal mutations to reduce the specificity of the ECG, non-infarction abnormalities can produce Q waves and significant changes in ST-T, the paper briefly review the main differential diagnosis of focal infarction-type electrocardiogram.