Cardiac enzyme tests look at the spectrum of cardiac enzymes in the blood, including creatine kinase, creatine kinase isoenzymes, aspartate aminotransferase, and alpha-hydroxybutyrate dehydrogenase. It is used to determine the degree of myocardial injury. Cardiac enzyme examination is mainly used for the judgment of myocardial injury, cardiac enzyme normally exists mostly in the cardiac muscle cells, the concentration in the blood is very low, when the heart is damaged, cardiac enzyme will be released into the bloodstream, and through the elevated level of cardiac enzyme in the bloodstream, it can be judged by the level of the severity of myocardial damage. Clinically, myocardial infarction can be diagnosed through the cardiac enzyme test, and patients with myocarditis can also show elevated levels of cardiac enzymes, and the recovery of the condition can be determined through the changes in cardiac enzymes. Abnormal cardiac enzymes test results, need to follow the doctor’s instructions for treatment, do not delay, so as not to delay the condition.