Cardiac function grade III indicates that cardiac insufficiency has occurred, and medications to strengthen the heart and reduce the load on the heart are given, such as furosemide, hydrochlorothiazide, and isosorbide nitrate. Cardiac insufficiency can lead to symptoms such as chest tightness, wheezing, and lower extremity edema, and the main treatment is to strengthen the heart and reduce the load on the heart. Common drugs for treating heart failure include hydrochlorothiazide and furosemide, which have diuretic effects and can reduce the load on the heart. Isosorbide nitrate can improve coronary blood supply, dilate the veins to reduce the amount of return blood and reduce the symptoms of heart failure. Heart failure with rapid atrial fibrillation patients, can be given digoxin oral, control ventricular rate to increase myocardial contractility, reduce the symptoms of heart failure. Heart failure patients should also pay attention to find the primary disease, such as coronary heart disease patients should be given anti-platelet therapy, if necessary, implantation of stents, heart valve disease patients can replace the valve. If there is discomfort, consult a doctor as soon as possible to avoid delaying the condition.