The Effect of Potassium Lowering Drugs on Cardiac Electrical Stability in Hemodialysis Patients (ART Study)

This study is a multicenter, prospective and randomized controlled study. The experiment includes a 1-week screening period (1 week before dialysis) and a 7-week treatment period (1-4 weeks of dose drip period and 5-7 weeks of evaluation period). During the screening period, all patients were randomly divided into the control group and the treatment group. On the non-dialysis day of the treatment period, the treatment group was given a certain dose of sodium zirconium silicate, and the blood potassium value was measured before and after each dialysis to maintain the blood potassium at 4.0-5.0mmol/L before dialysis. At the same time, 12-lead ECG and 24-hour Holter were completed at the first and last dialysis during the treatment period, and finally the ECG stability and its relationship with blood potassium were evaluated.

1. Screening period (1 week before administration): After 72 hours without dialysis treatment and before dialysis for the first time, complete the set 1 of laboratory inspection group, including hemoglobin, white blood cells, platelets, serum creatinine, urea nitrogen, alanine aminotransferase, aspartate aminotransferase, albumin, potassium, calcium, magnesium and bicarbonate. After dialysis, complete the set 2 of laboratory inspection group, including urea nitrogen and potassium. According to the ratio of 1: 1, the patients were randomly divided into control group (routine treatment) and experimental group (sodium zirconium silicate was given on the basis of routine treatment). 2. Dose drops period (1st week to 4th week): Blood samples are collected before and after dialysis for the first time every week to complete the set 3 of laboratory inspection group, including: potassium, and the dosage of SZC is adjusted according to the blood potassium value, which is administered on non-dialysis days, four times a week, starting from 5g/day each time, and the blood potassium before dialysis is maintained at 4.0-5.0mmol/L, which can be adjusted at 10g/week each time, and the highest dosage can be increased to 80g/week. 1. If the blood potassium is higher than 5.0mmol/L during the follow-up, the amount of SZC can be gradually increased to 30-80g per week. 2. If during the follow-up, the blood potassium before dialysis is lower than 5mmol/L, and the potassium concentration of dialysate is raised to 3mmol/L, other ion concentrations remain unchanged, including calcium, bicarbonate, sodium and magnesium. If the blood potassium is still below 5mmol/L in the follow-up, the SZC will be reduced to 10g per week. If the blood potassium is lower than 4.0mmol/L in the follow-up, stop the experiment. In the first week of drip period, 12-lead ECG and Holter were completed on the day of dialysis. 3.Evaluation period (week 5 to week 7): At the end of the experiment, blood was collected before the last dialysis to complete the laboratory inspection group set 1, and the 12-lead electrocardiogram was improved and Holter was worn, while blood was collected after dialysis to complete the laboratory inspection group set 2.