血清proBNP、RDW-CV对射血分数保留型心力衰竭患者发生主要心血管不良事件的预测价值

刘静 ,  尤露瑶 ,  杨羚

中国现代医学杂志 ›› 2025, Vol. 35 ›› Issue (14) : 67 -72.

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中国现代医学杂志 ›› 2025, Vol. 35 ›› Issue (14) : 67 -72. DOI: 10.3969/j.issn.1005-8982.2025.14.012
临床研究·论著

血清proBNP、RDW-CV对射血分数保留型心力衰竭患者发生主要心血管不良事件的预测价值

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Predictive value of serum proBNP and RDW-CV for MACEs in patients with heart failure with preserved ejection fraction

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摘要

目的 探讨血清N端B型脑钠肽前体(proBNP)、红细胞分布宽度变异系数(RDW-CV)对射血分数保留型(HFpEF)心力衰竭(以下简称心衰)患者发生主要心血管不良事件(MACEs)的预测价值。方法 选取2023年1月—2023年12月成都中医药大学附属龙泉中医医院收治的106例HFpEF心衰患者作为研究对象,记录患者出院后12个月内MACEs的发生情况,根据MACEs发生情况分为MACEs组、非MACEs组。比较两组的proBNP、RDW-CV表达差异,分析HFpEF心衰患者发生MACEs的影响因素分析,评估RDW-CV、proBNP对HFpEF心衰患者发生MACEs的预测价值。结果 106例HFpEF心衰患者中32例患者发生MACEs,占比30.19%。MACEs组RDW-CV、proBNP水平均高于非MACEs组(P <0.05),红细胞比容低于非MACEs组(P <0.05)。多因素逐步Logistic回归分析结果显示:红细胞比容低[OR=0.242(95%CI:0.097,0.606)]、RDW-CV水平高[OR=3.955(95%CI:1.595,10.006)]、proBNP水平高[OR=4.354(95%CI:1.738,10.905)]均为HFpEF心衰患者发生MACEs的危险因素(P <0.05)。受试者工作特征曲线结果分析得出,RDW-CV、proBNP及其联合预测HFpEF心衰患者发生MACEs的敏感性为77.1%(95%CI:0.683,0.845)、83.5%(95%CI:0.729,0.921)、91.4%(95%CI:0.813,0.996),特异性为79.5%(95%CI:0.701,0.889)、65.3%(95%CI:0.574,0.712)、61.4%(95%CI:0.561,0.709)。结论 RDW-CV、proBNP预测HFpEF心衰患者发生MACEs的效能良好。

Abstract

Objective To explore the predictive value of serum N-terminal pro-B-type natriuretic peptide (proBNP) and red blood cell distribution width-coefficient of variation (RDW-CV) for the occurrence of major adverse cardiovascular events (MACEs) in patients with heart failure with preserved ejection fraction (HFpEF). Methods A total of 106 HFpEF patients admitted to the Longquan Traditional Chinese Medicine Hospital Affiliated to Chengdu University of Traditional Chinese Medicine from January to December 2023 were selected as the study subjects. The occurrence of MACEs within 12 months after discharge was recorded, and patients were divided into the MACE group and the non-MACE group according to the occurrence of MACEs. The differences in proBNP and RDW-CV levels between the two groups were compared, and the factors influencing the occurrence of MACEs in HFpEF patients were analyzed. The predictive value of RDW-CV and proBNP for the occurrence of MACEs in HFpEF patients was assessed. Results Among the 106 HFpEF patients, 32 patients experienced MACEs, accounting for 30.19%. The RDW-CV and proBNP levels in the MACE group were higher than those in the non-MACE group (P < 0.05), and the hematocrit in the MACE group was lower than that in the non-MACE group (P < 0.05). The multivariable stepwise Logistic regression analysis revealed that low hematocrit [O^R = 0.242 (95% CI: 0.097, 0.606) ], high RDW-CV [O^R = 3.955 (95% CI: 1.595, 10.006) ], and high proBNP levels [O^R = 4.354 (95% CI: 1.738, 10.905) ] were identified as risk factors for the occurrence of MACEs in HFpEF patients (P < 0.05). ROC curve analysis showed that the sensitivities of RDW-CV, proBNP and their combination in predicting the occurrence of MACEs in HFpEF patients were 77.1% (95% CI: 0.683, 0.845), 83.5% (95% CI: 0.729, 0.921), and 91.4% (95% CI: 0.813, 0.996), with the specificities being 79.5% (95% CI: 0.701, 0.889), 65.3% (95% CI: 0.574, 0.712), and 61.4% (95% CI: 0.561, 0.709), respectively. Conclusion RDW-CV and proBNP are effective predictors for the occurrence of MACEs in HFpEF patients.

Graphical abstract

关键词

心力衰竭 / 左心室射血分数 / 主要心血管不良事件 / N端B型脑钠肽前体 / 细胞分布宽度变异系数

Key words

heart failure / left ventricular ejection fraction / major cardiovascular adverse events / N-terminal pro-B-type natriuretic peptide / red blood cell distribution width-coefficient of variation

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刘静,尤露瑶,杨羚. 血清proBNP、RDW-CV对射血分数保留型心力衰竭患者发生主要心血管不良事件的预测价值[J]. 中国现代医学杂志, 2025, 35(14): 67-72 DOI:10.3969/j.issn.1005-8982.2025.14.012

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心力衰竭(以下简称心衰)是一种涉及心脏的结构性改变、功能性异常及代偿机制失效的复杂病理改变,病死率高[1]。2021年欧洲心脏病学会将心衰根据左心室射血分数(left ventricular ejection fraction, LVEF)不同,分为射血分数保留型(heart failure with preserved ejection fraction, HFpEF≥50%)、射血分数轻度下降型和射血分数下降型[2],为心衰的诊疗提供了指导价值,但心衰相关主要心血管不良事件(major adverse cardiovascular events, MACEs)的发生率仍较高。N端B型脑钠肽前体(N-terminal pro B-type natriuretic peptide, proBNP)是由心肌细胞在应激状态下分泌的激素。研究报道proBNP水平能够反映心脏的充盈压、舒张功能障碍及心室重构的程度,与心衰的进展及预后有关[3-4]。红细胞分布宽度变异系数(red blood cell distribution width coefficient of variation, RDW-CV)是一种反映红细胞大小变异性的指标,与贫血、炎症、氧合不足及心血管重塑等多种病理过程相关[5]。研究表明,RDW-CV升高与心肌梗死、心房颤动等多种心血管事件的发生风险有关[6]。但目前血清proBNP与RDW-CV对HFpEF心衰患者发生MACEs的预测研究较少,本研究旨在探讨血清proBNP、RDW-CV对HFpEF心衰患者发生MACEs的预测价值,为HFpEF心衰的临床管理提供新的思路。

1 资料与方法

1.1 研究对象

选取2023年1月—2023年12月成都中医药大学附属龙泉中医医院收治的106例HFpEF心衰患者作为研究对象。其中,男性59例,女性47例;年龄52~79岁,平均(67.69±9.81)岁。本研究经医院医学伦理委员审批通过(No:2022-103)。剔除不接受随访者。

1.2 纳入与排除标准

1.2.1 纳入标准

①确诊左心室慢性心力衰竭[7];②参考2021版欧洲心脏病学会制订的心力衰竭诊疗指南,LVEF≥50%,为LVEF保留型心衰[2];③利钠肽升高;④纽约心脏病协会心功能分级Ⅱ~Ⅳ级;⑤年龄>18岁;⑥患者签署知情同意书。

1.2.2 排除标准

①全心衰或右心衰;②心脏架桥、血管置换等手术史;③合并严重的心肺综合征、心肾综合征等合并症;④肝、肾功能严重损害;⑤心源性休克;⑥难以控制的高血压;⑦妊娠或哺乳期女性;⑧心脏实性占位病变。

1.3 临床资料收集

整理患者入组后的基线资料,包括性别、年龄、冠心病、心律失常、收缩压、舒张压、静息心率、血白蛋白、血红蛋白、红细胞比容、红细胞分布宽度(red blood cell distribution width, RDW)、proBNP、总胆红素、肾小球滤过率(glomerular filtration rate, GFR)、血钠、血钾、LVEF、左心室内径。采用XN-1000型全自动血细胞分析仪(日本SYSMEX公司)检测血红蛋白、红细胞比容、RDW-CV,采用AU5800型全自动生化分析仪(美国Beckman Coulter公司)检测血白蛋白、丙氨酸氨基转移酶、总胆红素、肌酐、血尿酸、胆固醇、低密度脂蛋白、空腹血糖、血钠、血钾,采用Immulite 2000型化学发光免疫分析仪(德国Siemens公司)检测proBNP,采用Vivid E95型超声心动图(美国GE Healthcare公司)检测LVEF、左心室内径。

1.4 分组方法

记录患者出院后12个月内MACEs的发生情况,MACEs包括恶性心律失常、急性心肌梗死、急性心衰加重、心源性死亡。根据MACEs发生情况分为MACEs组、非MACEs组。随访日期截至2024年12月1日。

1.5 统计学方法

数据分析采用SPSS 26.0统计软件。计量资料以均数±标准差(x±s)表示,比较用t 检验;计数资料以构成比或率(%)表示,比较用χ²检验;影响因素的分析采用多因素逐步Logistic回归模型。绘制受试者工作特征(receiver operating characteristic, ROC)曲线。P <0.05为差异有统计学意义。

2 结果

2.1 MACEs发生情况

106例HFpEF心衰患者中32例患者发生MACEs,占比30.19%,非MACEs组74例,占69.81%。

2.2 MACEs组与非MACEs组基线资料比较

MACEs组与非MACEs组性别构成、年龄、冠心病患病率、心律失常率、收缩压、舒张压、静息心率、血白蛋白、血红蛋白、总胆红素、GFR、血钠、血钾、LVEF水平和左心室内径比较,经χ² / t 检验,差异均无统计学意义(P >0.05)。MACEs组与非MACEs组RDW-CV、proBNP水平和红细胞比容比较,经t 检验,差异均有统计学意义(P <0.05);MACEs组RDW-CV、proBNP水平均高于非MACEs组,红细胞比容低于非MACEs组。见表1

2.3 HFpEF心衰患者发生MACEs的影响因素

以HFpEF心衰患者是否发生MACEs(否=0,是=1)为因变量,红细胞比容水平(实测值)、RDW-CV水平(实测值)和proBNP水平(实测值)为自变量,进行多因素逐步Logistic回归分析(引入水准为0.05,排除水准为0.10),结果显示:红细胞比容低[O^R=0.242(95% CI:0.097,0.606)]、RDW-CV水平高[O^R=3.955(95% CI:1.595,10.006)]、proBNP水平高[O^R=4.354(95% CI:1.738,10.905)]均为HFpEF心衰患者发生MACEs的危险因素(P <0.05)。见表2

2.4 RDW-CV、proBNP对HFpEF心衰患者发生MACEs的预测价值

ROC曲线结果得出,RDW-CV、proBNP及其联合预测HFpEF心衰患者发生MACEs的敏感性为77.1%(95% CI:0.683,0.845)、83.5%(95% CI:0.729,0.921)、91.4%(95% CI:0.813,0.996),特异性为79.5%(95% CI:0.701,0.889)、65.3%(95% CI:0.574,0.712)、61.4%(95% CI:0.561,0.709)。见表3图1

3 讨论

HFpEF心衰的发病机制复杂,涉及心室-血管相互作用、微血管功能障碍、炎症反应等多个方面[8-9]。然而,由于HFpEF心衰的病理机制尚未完全阐明,加之缺乏明确有效的治疗策略,部分患者常发生MACEs,疾病预后较差[10-11]。因此,HFpEF心衰的临床管理不仅是控制症状,筛选高敏性血清标志物和血液学指标识别高风险人群、预测心血管事件的发生也有助于早期制订合理的MACEs预防性策略,改善预后。

proBNP是心肌细胞是由心肌细胞合成并分泌的一种前体分子,是BNP的前体形式。BNP是由心室肌细胞在压力超负荷、体积超负荷、血液高钠浓度等机械性应激或化学性应激状态下应激合成并分泌的一种激素,与心肌损伤高度相关[12-13]。研究表明,proBNP进入血液循环后被酶解为N端B型脑钠肽前体(proBNP1-76)和C端BNP(BNP1-32),其中C端BNP能通过扩张血管、排钠、降低血压等方式减轻心脏负担;而proBNP的稳定性强,能够反映心脏的负荷状态[14-15]。RDW-CV是衡量红细胞体积异质性的一个常用实验室指标,反映红细胞体积分布的变异程度[16-17]。研究发现,贫血及心血管疾病患者RDW-CV呈病理性升高,与心肌缺血损伤有关[18]。心衰是心脏无法有效泵血满足人体代谢需求的病理状态,可导致心肌应激性创伤及心肌缺血等症状[19]。本研究结果显示,MACEs组RDW-CV、proBNP均高于非MACEs组,多因素逐步Logistic回归分析得出两者是HFpEF患者发生MACEs的危险因素,提示RDW-CV、proBNP的异常表达与HFpEF心衰患者发生MACEs有关。有研究分析,RDW-CV升高反映了红细胞体积分布的异质性,与机体的全身性炎症、氧合不全及骨髓造血功能的紊乱密切相关[20]。研究发现,在HFpEF心衰患者心脏供血不足、微血管功能障碍可能通过激活炎症反应和氧化应激途径,促使红细胞生成过程中出现形态不均的现象,提示可能是心脏重构和微血管病变的表征,使患者发生MACEs的风险升高[21-22]。可见RDW-CV升高可能是心衰患者病情加重的早期预警信号,反映潜在的微血管损伤、心肌缺血或氧供失衡等病理状态。proBNP升高反映了心脏的压力负荷和扩张的程度[23-24]。在HFpEF心衰患者中,proBNP升高可通过提示心脏的代偿性反应、心肌牵张及应激反应的增强来揭示潜在的心血管病理过程[25-26]。研究表明,尽管HFpEF心衰患者LVEF正常,但由于左心室的舒张功能障碍,心脏对负荷的反应机制呈代偿性升高,导致proBNP升高,表明心脏功能的潜在不稳定性[27-28]。此外,研究表明proBNP升高与心脏充盈压的升高、心脏组织的重塑及微血管功能的障碍有关,多种因素共同促成心衰病程的恶化,提高MACEs的发生率[29-30]。本研究ROC曲线结果得出,RDW-CV、proBNP预测HFpEF心衰患者发生MACEs的敏感性、特异性较高,提示RDW-CV、proBNP可用于辅助预测HFpEF心衰患者发生MACEs的风险,预测效能良好。

综上所述,RDW-CV、proBNP预测HFpEF心衰患者发生MACEs的效能良好。但本研究纳入样本量有限,后续仍需完善多中心、大样本的研究,深入探讨RDW-CV、proBNP在HFpEF心衰患者发生MACEs的病理机制,为MACEs的早期识别提供支持。

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基金资助

四川省科技厅科技计划项目(2022YFS0356)

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