The syndrome of inappropriate antidiuretic hormone secretion (SIADH) refers to the abnormally increased secretion of endogenous antidiuretic hormone (ADH, i.e., arginine pressor AVP) due to multiple causes, with inappropriately high plasma antidiuretic hormone concentrations relative to body fluid osmolality, resulting in water retention, increased urinary sodium excretion, and dilutional hyponatremia, among other related A group of syndromes with clinical manifestations. So how do elderly patients in the diet to be carried out? 1, moderate to eat some poultry, lean meat, fish. Such as smoked pork, luncheon meat, scallops, beef. 2.The main sources of sodium in common foods are: large red sausage, cereal bran, corn flakes, pickled cucumber, ham, green olives, luncheon meat, oats, potato chips, sausage, seaweed, shrimp, soy sauce, tomato sauce, spinach, winter squash, eggplant, dried tofu, etc. 3, for those with chronic sodium loss hyponatremia, attention should be paid to the amount of sodium supplementation should reach two times the regular calculated amount, the rate of sodium supplementation should not be too fast, while supplementing the appropriate amount of magnesium and other mineral elements, such as; green leafy vegetables, coarse grains, nuts and other foods. 4.If elderly patients have the following conditions during the stable period of chronic heart failure, it is not necessary to excessively restrict sodium intake, namely: long-term loss of appetite and malnutrition; long-term use of thiazide diuretics; combined hypoproteinemia and low blood sodium concentration monitoring, etc. In these cases, patients can have a daily salt intake of 4-5 grams, while eating more potassium-rich foods, such as bananas, strawberries, citrus, grapes, grapefruit, watermelon, spinach, yams, mao beans, amaranth, and green onions.