The most common reason for the elevation of myocardial enzymes is the elevation of myocardial enzymes due to myocardial ischemia, myocardial injury, or myocardial injury caused by myocarditis. Myocardial enzymes are very sensitive indicators representing myocardial injury. Myocardial enzymes include troponin, creatine kinase, myoglobin, lactate dehydrogenase, transaminase, etc. Once the assay finds that there is an increase in myocardial enzyme, it is necessary to consider the myocardial injury caused by multiple reasons. It is necessary to find the cause of myocardial injury and give corresponding treatment to avoid large-scale myocardial injury that affects the function of the heart. Especially in patients with myocardial infarction, regular monitoring of changes in myocardial enzymes can help determine the direction of the disease and the effect of treatment.