Laboratory tests for cardiac enzymes are usually available in about 1 hour. If the cardiac enzymes are done in the department, for example, there are some cardiovascular medicine departments, the laboratory test of cardiac enzymes can be done in the ward, and the results are usually available in about 15 minutes. Cardiac enzymes are helpful in further evaluating whether a patient has had an acute myocardial infarction or myocarditis. If creatine kinase is elevated in a simple case, consider the possibility of hypothyroidism or muscle injury or severe infection, which may also trigger an elevation of creatine kinase. If the elevation of creatine kinase is accompanied by elevations of creatine kinase isozymes and troponin, acute myocardial infarction or myocarditis is highly considered. In some patients, such as those with acute heart failure, troponin is elevated. Therefore, in addition to the results of cardiac enzymes, the results should be taken into account with the actual clinical symptoms and conditions of the patient to make a comprehensive reference.