Whether the elderly with heart failure need to take diuretics for a long period of time needs to be decided according to the relief of the heart failure condition and the changes of biochemical indexes after the patients take diuretics. Elderly people with heart failure usually need to take diuretics for a long period of time to reduce the volume load of the heart, as well as to reduce preload, so that the related symptoms can be relieved; however, electrolyte disorders may occur after diuretics are taken, for example, furosemide, hydrochlorothiazide, and other drugs may lead to hypokalemia, hyperuricemia, etc., and spironolactone may lead to hyperkalemia after taking it. Therefore, after using diuretics, electrolytes, renal function and other indicators need to be monitored. If hyperkalemia, hypokalemia, hyperuricemia and other discomforts occur; then it is necessary to go to the hospital in time, and adjust the medication regimen under the guidance of the doctor after combining with the comprehensive assessment of the condition, which can be used in small dosage, combination of drugs or intermittent methods to avoid side effects. When heart failure occurs, it is recommended to go to the hospital in a timely manner, active diagnosis and treatment. If you need to use the above diuretics need to be standardized under the guidance of a doctor.