Grade 2 heart failure is usually associated with myocarditis, coronary artery disease, myocardial infarction, etc. Nutritional myocardial drugs, diuretics, cardiac stimulants, angiotensin-converting enzyme inhibitors, and beta-blockers can be chosen in conjunction with the cause of the disease. 1. Myocarditis: it is a relatively common diffuse acute inflammatory lesion. It can be treated with oral nutritional myocardial drugs, such as phosphoric acid and trimetazidine. 2. Coronary heart disease: heart disease caused by narrowing of the coronary artery lumen, such as heart failure, oral diuretics, such as furosemide; heart failure is more serious, myocardial oxygen consumption is relatively large, can be oral cardiac drugs, such as digoxin. At the same time also need to be combined with nitric acid drug therapy, such as nitroglycerin. 3. Myocardial infarction: mainly due to myocardial ischemia due to severe, when caused by heart failure, patients may appear shortness of breath, dyspnea and other symptoms. For this must be taken as soon as possible oral beta-blocker antiarrhythmic, such as metoprolol. If patients with secondary heart failure need to use drugs, must be under the guidance of a professional physician, avoid taking without authorization. Before treatment, it is recommended to consult a doctor in a timely manner, and then combined with the cause of the symptomatic use of drugs.