血清碳酸氢盐水平与腹膜透析患者心血管事件关联性研究

The relationship between serum bicarbonate and cardiovascular events in peritoneal dialysis patients

目的 探讨血清碳酸氢盐水平与腹膜透析(PD)患者心血管事件的关联性。方法 回顾性收集行PD置管术并规律随访至2023年3月31日的PD患者资料,根据时间平均血清碳酸氢盐水平将纳入患者分为低碳酸氢盐组和正常碳酸氢盐组,比较两组患者心血管事件(包括冠心病、心力衰竭、卒中、外周血管疾病、与心血管手术相关的死亡或动脉瘤夹层或破裂导致的死亡、致命性肺栓塞或由于其他或未知的心血管原因导致的死亡)的发生率以及分析发生心血管事件的危险因素。结果 截止随访时共纳入PD患者110例,出现心血管事件34例,与正常碳酸氢盐组相比,低碳酸氢盐组患者的心血管事件发生率更高。单因素Cox回归分析表明,低碳酸氢盐组是正常碳酸氢盐组发生心血管事件风险的4.197倍(95%CI=2.115~8.331,P<0.001),校正多种混杂因素后显示低碳酸氢盐组是正常碳酸氢盐组发生心血管事件风险的3.506倍(95%CI=1.709~7.193,P=0.001)。多因素竞争风险模型结果显示,低碳酸氢盐组是正常碳酸氢盐组发生心血管事件风险的3.801倍(95%CI=1.920~7.525,P<0.001)。结论 低血清碳酸氢盐水平与PD患者发生心血管事件密切相关,是PD患者发生心血管事件的独立危险因素。

Objective To investigate the correlation between serum bicarbonate level and cardiovascular events in peritoneal dialysis(PD) patients.Methods The data of PD patients who underwent PD catheterization and were followed up regularly until March 31,2023 were retrospectively collected.The included patients were divided into low bicarbonate group and normal bicarbonate group according to the time-averaged serum bicarbonate level.The incidence of cardiovascular events(including coronary heart disease,heart failure,stroke,peripheral vascular disease,death related to cardiovascular surgery or death due to aneurysm dissection or rupture,fatal pulmonary embolism,or death from other or unknown cardiovascular causes) was compared between the two groups and the risk factors for cardiovascular events were analyzed.Results At the end of follow-up,a total of 110 PD patients were included,and 34 patients had cardiovascular events.Compared with the normal bicarbonate group,the low bicarbonate group had a higher incidence of cardiovascular events.Univariate Cox regression analysis showed that the risk of cardiovascular events in the low bicarbonate group was 4.197 times higher than that in the normal bicarbonate group(95% CI=2.115-8.331,P<0.001).After adjusting for multiple confounding factors,the risk of cardiovascular events in the low bicarbonate group was 3.506 times higher than that in the normal bicarbonate group(95% CI=1.709-7.193,P=0.001).The results of multivariate competing risk model showed that the risk of cardiovascular events in the low bicarbonate group was 3.801 times higher than that in the normal bicarbonate group(95% CI =1.920-7.525,P<0.001).Conclusion Low serum bicarbonate level is closely related to the occurrence of cardiovascular events in patients with PD,and it is an independent risk factor for cardiovascular events in patients with PD.