Enlarged heart refers to a variety of diseases that result in either hypertrophy of the heart wall or enlargement of the heart chambers, and the two often coexist. Most patients’ heart enlargement is caused by viral myocarditis, anemia, hypertension, malnutrition and other causes of mild to moderate heart enlargement, the condition is not serious; a small number of patients’ heart enlargement is dilated cardiomyopathy, coronary artery disease, chronic myocarditis, chronic pulmonary heart disease and other diseases caused by severe heart enlargement, the patient’s cardiac function is incomplete, the effect of the treatment is poor, the condition is serious. 1.; Most patients’ heart enlargement is caused by viral myocarditis, anemia, hypertension, malnutrition, etc., and their heart enlargement is mainly caused by compensatory hypertrophic hyperplasia of the myocardium, with little ischemic and hypoxic necrosis of myocardial cells, and the enlargement of the heart chambers is insignificant, and cardiac function can be compensated after correcting the cause of the disease and symptomatic treatment. 2; A small number of patients with enlarged heart is dilated cardiomyopathy, coronary artery disease, chronic myocarditis, chronic pulmonary heart disease and other diseases caused by the heart enlargement is mainly ischemia and hypoxia fibrosis of cardiomyocytes, the heart cavity becomes thinner and larger, cardiac dysfunction is easy to recur after correcting the failure to compensate for, it is not easy to treat, and ultimately need a heart transplantation. If the examination found to have heart enlargement problems, it is recommended to go to the hospital for further consultation, examination and treatment according to the doctor’s instructions.