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急性心肌梗塞(AMI)的急性期死亡,约半数以上在发病2～3小时内,因此早期作出诊断,及时治疗,极其重要,AMI在发病早期,血中磷酸激酶、肌凝蛋白轻链尚未增高,诊断有一定困难,这时就必须依靠自觉症状为主的临床和心电图表现,AMI的典型心电图改变为,异常Q波形成、ST弓背形抬高及T波倒置、规律性演变。但由于种种原因、心电图诊断AMI的灵敏性和特异性有限,约15～20%甚至
Acute myocardial infarction (AMI) in the acute phase of death, more than about half of the onset of 2 to 3 hours, so early diagnosis and timely treatment, is extremely important, AMI early onset, blood phosphomycin, myosin light chain has not increased , There are some difficulties in diagnosis. At this time, we must rely on the clinical and electrocardiographic manifestations of subjective symptoms. The typical ECG changes of AMI are abnormal Q wave formation, ST dorsoventral elevation and T wave inversion, and regularity evolution. However, due to various reasons, the sensitivity and specificity of ECG diagnosis of AMI is limited, about 15 ~ 20% or even