The main causes of heart failure are myocardial lesions and cardiac overload. 1. Myocardial lesions: primary myocardial lesions: myocardial ischemia caused by coronary artery disease, myocardial infarction, viral myocarditis, dilated cardiomyopathy, hypertrophic cardiomyopathy and so on. Secondary cardiomyopathy: diabetic cardiomyopathy, hyperthyroidism cardiomyopathy, cardiomyopathy caused by connective tissue disease, myocardial injury caused by cardiotoxic drugs. 2. Excessive cardiac load: cardiac preload overload: that is, the heart end-diastolic capacity is too high, common diseases are heart valve closure insufficiency, chronic anemia, hyperthyroidism and so on. Heart afterload: is the heart ejection resistance is too large, mainly seen in hypertension, pulmonary hypertension, aortic stenosis. Patients who have discomfort and heart failure disease, it is recommended to standardize the treatment under the guidance of professional doctors to control the condition.