Chronic renal failure is often accompanied by heart failure for the following reasons: 1, hemodialysis patients with irregular hemodialysis, long intervals between dialysis or usually do not pay attention to diet and water control, resulting in water and sodium retention, which increases the preload of the heart induced heart failure; hemodialysis patients with inadequate dialysis, excessive accumulation of toxins in the body to inhibit myocardial contractility, resulting in heart failure; 2, poor control of hypertension, chronic renal failure patients Hypertension is mostly related to water and sodium retention, any nature of hypertension if not given control can lead to heart failure; 3, severe anemia can increase the burden on the heart, if not corrected anemia, in the long run can lead to heart failure; 4, chronic renal failure patients are prone to electrolyte disorders, such as high potassium, low calcium, metabolic acidosis, in serious cases can lead to heart failure; 5, arteriovenous fistulae there is a large number of Arteriovenous shunt, increased venous return leads to overload of the heart, resulting in heart failure; 6, chronic renal failure patients with low immune function, easy to complicate the respiratory, digestive and urinary tract infections, especially lung infections, easy to induce heart failure.