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尿液pH值:一种用于直接PCI STEMI患者的新型生物标志物|ACC 2019

2019-03-17 00:00:00来源:医脉通阅读:36次

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低尿液pH值(UpH)与代谢综合征慢性肾病有关,但很少有研究评估UpH与行直接PCI的STEMI患者的关系。ACC 2019年会发布的一项研究结果显示,对于行直接PCI的STEMI患者,低UpH是不良预后的一个独立危险因素。



研究简介


该研究由广东省人民医院心内科陈纪言、谭宁、何鹏程等教授主导,连续入选从2010年1月至2016年6月行直接PCI的STEMI患者。研究人员根据患者入院时UpH水平将患者分为3组,评估UpH与全因死亡率或主要心血管不良事件(MACE)的关系。


研究共入选STEMI患者2081例。其中,833例患者UpH<6.0,934例患者6.0≤UpH<7.0,314例患者UpH≥7.0。


结果显示,与其他水平UpH组相比,低UpH组的住院期间全因死亡率和MACE发生率明显升高(P<0.05和P<0.05)。多因素分析发现,校正其他可能的影响因素后,低UpH(<6.0)仍然是院内全因死亡(OR 2.40,95%CI 1.27-4.57,P=0.007)和MACE(OR 2.76,95%CI 1.58-4.85,P<0.001)的独立危险因素。


中位随访2.7年,Kaplan-Meier分析显示,UpH<6.0的患者全因死亡率显著升高。校正潜在危险因素后,多因素COX分析显示,低UpH是长期全因死亡的独立危险因素(OR 2.02,95%CI 1.19-3.43,P=0.010)。



因此,对于行直接PCI的STEMI患者而言,简单易获取的UpH是不良预后的独立危险因素。


讨论


UpH是酸负荷和某些疾病进展的有用标志物。近年来相继有研究探讨低UpH与CKD脂肪肝和代谢综合征等疾病的发生明显相关,本研究也显示低UpH可预测全因死亡率或MACE等不良预后。


研究者之一刘远辉博士,认为可能的机制如下:第一,心肌梗死时心输出量减少,微循环灌注不足或缺血再灌注损伤造成组织代谢性酸中毒;第二,STEMI患者氧自由基的异常活跃;第三,低UpH的STEMI患者AKI的发生率更高,而既往相关的研究也显示UpH<6 冠心病患者AKI的发生率显著高于UpH>6.0的患者。


然而,研究者同样表示,UpH受多种因素影响,目前尚无法排除所有这些因素的干扰效应。另外,作为前瞻性观察性研究,本研究结果不能证明因果关系。然而,尿常规检测作为一种非侵入性且廉价的方法,UpH可作为STEMI患者在门诊或常规接受PCI治疗效果的有用预测指标。


研究摘要


1000-05 - Spot-Testing Urine pH, a Novel Biomarker For Patients With ST-Segment Elevation Myocardial Infarction Undergoing Primary Percutaneous Coronary Intervention


Background: Low urinary pH (UpH) is related to metabolic syndrome and chronic kidney disease, but few studies were performed to evaluate the value of UpH in patients with ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI).


Methods: Patients with STEMI undergoing primary PCI were consecutively enrolled between Jan. 2010 to Jun. 2016. Patients were divided into 3 groups based on the levels of UpH. We evaluated the relationship between UpH and all-cause mortality or major adverse cardiac events (MACEs).


Results: 2081 STEMI patients were enrolled. There were 833 patients with UpH<6.0, 934 patients with 6.0≤UpH<7.0 and 314 patients with UpH≥7.0. The incidence of in hospital all-cause mortality and MACEs was significantly higher in low UpH group. Multivariate analysis found that the low UpH (<6.0) was an independent predictor of in-hospital all-cause mortality (OR, 2.40, 95%CI, 1.27-4.57, P=0.007) and MACEs (OR, 2.76, 95%CI, 1.58-4.85, P<0.001). After a median follow-up of 2.7 years, the Kaplan-Meier analysis showed that patients with UpH<6.0 had significantly higher all-cause mortality. After adjustment of the potential risk factors, multivariate cox analysis demonstrated that low UpH was an independent predictor of long-term all-cause mortality(OR, 2.02, 95%CI, 1.19-3.43, P=0.010).


Conclusion: Low UpH was a simple, accessible and independent risk factor for poor clinical outcomes in STEMI patients undergoing primary PCI.


作者简介



刘远辉,医学博士,广东省人民医院心内科。


专题链接>>> 第68届美国心脏病学会科学年会(ACC 2019)

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