Cardiac enzyme tests generally refer not only to the measurement of cardiac enzymes, but also include markers of injury such as myoglobin and troponin, and there are basically three of them, namely ultrasensitive troponin, myoglobin and phosphocreatine isoenzyme. The price of the cardiac enzyme test fluctuates somewhat from hospital to hospital, and generally includes three components. The cost is usually about three hundred dollars at a tertiary care hospital, and may be as low as about one hundred dollars. The price fluctuates and varies with the content of the cardiac enzyme program. Normally, the cardiac muscle damage test at a tertiary care hospital is three items, but it may be four items, including lactate dehydrogenase isoenzyme, creatine kinase, creatine kinase isoenzyme and ultrasensitive troponin. Among these four tests, ultrasensitive troponin is the most specific indicator for the diagnosis of acute myocardial infarction. The enzyme can be elevated two hours after the onset of the disease and is the most rapid, specific and sensitive indicator for the diagnosis of myocardial infarction. The cost of myocardial enzyme test is usually about 100 to 300 yuan, depending on the level of the hospital and the region, but the difference is not great. Myocardial enzyme test is mainly used for the diagnosis of acute myocardial infarction, and is of great clinical importance to confirm the diagnosis.