A 70-year-old man with grade IV cardiac function can be treated by general treatment and medication. 1. General treatment: mainly by paying attention to rest, limiting the intake of water, sodium and other substances, avoiding strenuous exercise and violent fluctuations in mood. 2. Drug therapy: you can use cardiac drugs such as digoxin, diuretics such as hydrochlorothiazide, vasodilator drugs such as nitroglycerin, etc., and auxiliary use of drugs that can improve the prognosis such as metoprolol, captopril, etc., in severe cases, it is necessary to be hospitalized, and supplemented with oxygen inhalation, electrocardiography, cardiac monitoring, and auxiliary devices to strengthen the heart treatment. 70-year-old people with cardiac function grade IV should seek timely medical treatment, and related drugs should be used under the guidance of a doctor.