The four cardiac antibodies are anti-cardiac contractile protein antibody, anti-cardiac membrane protein receptor antibody, anti-cardiac mitochondrial antibody and anti-cardiac structural protein antibody. Myocardial antibodies are relatively sensitive indicator values of myocardial disorders, mainly reflecting the problem of myocardial injury, but also can be used as an indicator value of the situation of restoring the function of the heart after surgery, such as acute viral myocarditis, endocarditis, acute myocardial infarction and other myocardial disorders in the course of myocardial disorders, the myocardium can be subjected to varying degrees of damage. As long as the myocardium suffers damage, anti-cardiac antibodies may be released into the blood, and the antibody titer of this type of antibody in the blood can be tested, which can directly reflect the degree of myocardial damage, and is helpful for rapid clinical diagnosis of these diseases. If the patient has any of the above problems, review the cardiac antibodies regularly, and if there is a problem, consult a doctor to give treatment in time.