Drinking a lot of water is generally an unfavorable effect on patients with underlying heart disease, so patients with heart disease should not drink excessive amounts of water. For people with no underlying heart disease, moderate drinking water can promote the body’s metabolism, replenish skin moisture, etc. Excessive drinking water to a certain extent will cause abdominal distension, edema and other symptoms, generally does not affect the heart to cause significant effects. The heart has organic lesions of patients need to control drinking water. Because excessive drinking water will dilute the blood in the body, the return blood volume increases, increasing the burden on the heart, may appear palpitations (rapid heartbeat, often accompanied by panic), and in severe cases, will lead to heart failure exacerbated. Therefore, heart patients are advised to control the amount of water they drink, as well as the intake of fat, sugar and salt, and to drink small amounts of water several times to avoid aggravating the burden on the heart by drinking too much water at once.