Heart failure is one of the most serious stages of heart disease. The prognosis varies depending on the cause and the stage it is in. The treatment of heart failure involves control of preload and afterload on the heart, control of increased myocardial contractility. The treatment of heart failure requires the control of cardiac preload and afterload, the control of increased myocardial contractility, and the improvement of myocardial remodeling, which are determined on an individual basis, and the medication for heart failure needs to be adjusted at all times according to electrolytes and volume. Because patients with heart failure should not keep taking digoxin and diuretics orally for a long period of time without coming to the doctor for follow-up checkups.