Dialysis patients have a higher incidence of cardiovascular events and require more effective measures to delay the progression of heart failure. Many studies have shown that dapagliflozin has cardioprotective effect, but most studies focus on non-dialysis patients with eGFR more than 20ml/min/1.73m2. However, the data on patients with eGFR less than 20ml/min/1.73m2 or dialysis patients, especially peritoneal dialysis patients, is less. Exploring the efficacy and safety of Dapagliflozin in improving heart failure in dialysis patients is of great clinical significance.

Inclusion Criteria:

• 1.Age between 20 and 70 years old; 2.Maintenance dialysis for longer than 3 months; 3.Diagnosis with chronic heart failure, Left ventricular ejection fraction (LVEF)≤40% or NT-proBNP>12000pg/ml; 4.The patient signs an informed consent form.

Exclusion Criteria:

• 1.Patients with liver function impairment; 2.Patients with severe hypoglycemia/hypotension/ketoacidosis; 3.Patients with active pyelonephritis or symptomatic urinary tract infection; 4.Dapagliflozin allergies or severe adverse reactions; 5.Patients suffering from other severe diseases; 6.Patients participating in other clinical trials; 7.Pregnant or lactating women; 8.Failure to sign a written informed consent form; 9.Unable or unwilling to comply with the experimental protocol approved by the researcher