The 5 cardiac enzymes test mainly refers to glutamate aminotransferase, alpha-hydroxybutyrate dehydrogenase, creatine kinase, creatine kinase isoenzyme and lactate dehydrogenase. 1. Glutamine aminotransferase: it is usually elevated due to physiological factors such as prolonged staying up late, exertion, eating barbecue for a long period of time, as well as pathologic factors such as liver cancer, cirrhosis, acute myocardial infarction, and so on. 2. α-Hydroxybutyric acid dehydrogenase: usually due to myocardial infarction, active rheumatic myocarditis, acute viral myocarditis and other factors, leading to the increase of this index; secondly, the decrease of this index is usually due to the application of immunosuppressants, anticancer agents and other drugs. 3. Creatine kinase: it is usually elevated due to factors such as strenuous exercise, cardiac compression, urinary system examination, injection of anesthesia drugs, myocardial infarction, viral myocarditis, and so on; secondly, it may be lowered due to factors such as hyperthyroidism, and so on. 4. Creatine kinase isoenzyme: Usually the index is elevated in acute myocardial infarction, hypothyroidism, cerebrovascular disease, etc., and the index may be lowered about 3-4 days after myocardial infarction, and it will be gradually lowered and returned to normal. 5. Lactate dehydrogenase: the index is commonly elevated in myocardial infarction, acute hepatitis, leukemia, skeletal muscle injury and other factors, while the index is reduced without clinical significance. When the indicators of 5 cardiac enzymes are abnormal, it is recommended to consult the doctor in time and treat the symptoms after clarifying the cause of the disease under the doctor’s guidance.