摘要Two cases presenting with chest pain of abrupt onset were initially misdiagnosed as acute myocardial infarction.Both of their electrocardiogram (ECG) seemed to have a dynamic evolution in V1-6 lead,but myocardial injury markers were normal.The false dynamic change in ECG was because of the ECG gain.Patients who presented with chest pain,ST segment elevation in ECG,and seemed to have a dynamic evolution needed to pay more attention to the gain of ECG lead.It is important to analysis the change of myocardial injury markers,aorta CTA,MRI and echocardiography systematically in order to avoid misjudgment.
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