Cardiogenic edema is an edema of the body caused by heart dysfunction. Edema occurs when heart failure occurs due to various causes of heart disease. The characteristics of cardiogenic edema are: 1. The edema develops gradually, first as a decrease in urine output and weight gain, and then gradually as edema of the lower limbs and the whole body. 2. The edema first starts from the sagging parts of the body and gradually develops into generalized edema. Generally, sinkable edema of the lower limbs appears first, with the ankle being the most obvious. 3. Other signs and symptoms associated with right heart failure and elevated venous pressure, such as palpitations, shortness of breath, jugular venous anger, hepatomegaly, and even chest and ascites. Related tests include electrocardiogram, X-ray, echocardiogram, radionuclide and magnetic resonance imaging (MRI), exercise tolerance and peak oxygen consumption measurement, etc. According to its etiology, it can be divided into the following categories: 1. cardiogenic edema: common in congestive heart failure, acute or chronic pericarditis, etc.; 2. nephrogenic edema: common in glomerulonephritis, pyelonephritis and nephrotic syndrome, etc.; 3. hepatogenic edema: common in viral hepatitis, hepatic sclerosis, etc.; 4. malnutrition edema: common in hypoproteinemia, vitamin Bl deficiency, etc.; 5. edema due to connective tissue disease Edema due to connective tissue diseases: common in lupus erythematosus, scleroderma and dermatomyositis, etc.; 6, allergic edema: such as serum sickness, etc.; 7, endocrine edema: common in Silhan’s disease, hypothyroidism and Cushing’s syndrome, etc.; 8, idiopathic edema: such as functional edema, etc.; 9, others: anemic edema, toxic edema in pregnancy, etc.