Chronic kidney disease, especially renal failure, affects the cardiovascular system for two most important reasons, namely myocardial damage and volume problems, which can be prevented. Poorly controlled diabetes, hypertension, anemia, disorders of calcium and phosphorus metabolism, inflammation, malnutrition, and secondary hyperparathyroidism can lead to myocardial cell damage, causing myocardial contractile weakness and heart failure. Heart muscle cells are non-renewable and cannot be repaired once they are damaged, so actively controlling these adverse factors is a powerful measure to prevent heart failure. Meanwhile, patients with renal insufficiency often show anuria or oliguria, and the water intake and the water produced by metabolism in the body are directly retained in the body, resulting in blood volume expansion and increased cardiac load and thus cardiac insufficiency, so it is important to control water intake to prevent heart failure. In patients with cardiovascular disease, due to severe arrhythmia or myocardial contraction, the effective blood flow is reduced and the perfusion pressure is lowered resulting in insufficient blood supply to the kidneys, which can cause kidney damage and in severe cases, kidney function can decline; in addition, the burden on the kidneys is often increased when medication is used for cardiac insufficiency.