急性心肌梗塞（AMI）的早期诊断和及时治疗是降低死亡率的关键。尤其是目前开展的溶栓治疗更要求在发病后4小时内给予确诊。目前，在AMI的生化诊断方面，血清酶CKCK-同工酶是常用的灵敏度很高的指标，尤其是CKAIB被公认为诊断AMI的金标准，但最早也要在AMI发病后4～8小时才开始 Early diagnosis and prompt treatment of acute myocardial infarction (AMI) are the key to reducing mortality. In particular, the current thrombolytic therapy requires more diagnosis within 4 hours after onset. Currently, in the biochemical diagnosis of AMI, serum CKCK-isoenzyme is a commonly used indicator of high sensitivity, especially CKAIB is recognized as the gold standard for the diagnosis of AMI, but the earliest, but also in the AMI 4 to 8 hours after onset Start