Neurology-强化降压导致肾脏损伤,预后更差

2021-07-13 Freeman MedSci原创

-强化降压导致肾脏损伤,预后更差

卒中和慢性肾脏病(CKD)是严重的公共卫生问题。以估计肾小球滤过率(eGFR)降低为主要特征的CKD在中风患者中很常见,并与不利的结果有关。强化降压(BP)是脑内出血(ICH)的一个合理的治疗选择;然而,强化控制血压在CKD患者中存在争议。根据一些观察性研究,CKD削弱了强化收缩压(SBP)控制的有益效果。

收缩压干预试验(SPRINT)的事后分析报告称,强化血压控制增加了急性肾损伤(AKI)的发生率,对中重度CKD患者几乎没有血管方面的益处。

然而,这些研究并不包括急性卒中患者。在ICH患者中,第二次急性脑出血强化降压试验(INTERACT2)表明,与标准相比,强化降压在功能结果上有适度改善;其事后分析显示,早期强化降压的效果在不同的eGFR中是一致的。

同时,在急性脑出血的降压治疗II(ATACH-2)研究中,调查了在症状发生后4.5小时内开始的强化(目标110-139mmHg)与标准(目标140-179mmHg)SBP降压的疗效,强化SBP降压治疗并没有改善功能结果,但引起了对肾脏不良事件(AE)的关注。

强化治疗组的肾脏AEs发生率是标准治疗组的2倍(9.0% vs. 4.0%)。这些发现表明,强化降压治疗在急性ICH中的安全性仍然令人担忧,尤其是在有CKD的患者中。在选择强化降压治疗的目标人群时,了解肾功能对临床结果和治疗的影响至关重要。

藉此,日本国家心脑血管中心的 Mayumi Fukuda-Doi等人,利用ATACH-2试验数据,探讨eGFR对临床结果的影响以及其与ICH患者强化降压治疗的相互作用。

他们对ATACH-2进行了事后(post-hoc)分析,这是一项随机的、两组的、开放标签的试验。每个符合条件的病人的基线eGFR是用慢性肾脏病流行病学合作方程计算的。所关注的结果是90天后的死亡或残疾。采用多变量逻辑回归模型进行分析。

在1000名接受随机治疗的患者中,974人接受了分析。

基线eGFR中位数为88(四分位数范围:68,99)ml/min/1.73 m2;451(46.3%)、363(37.3%)和160(16.4%)名患者的基线eGFR值分别为≥90、60-89和<60 ml/min/1.73m2。

与正常的eGFR(≥90 ml/min/1.73 m2)相比,eGFR值<60 ml/min/1.73 m2的人死亡或残疾的几率较高,但eGFR值为60-89 ml/min/1.73 m2的人则没有。

在eGFR下降的患者中,强化组的死亡或残疾几率明显更高;

在eGFR值≥90、60-89和<60 ml/min/1.73 m2的患者中,ORs分别为0.89(95% CI 0.55-1.44)、1.13(0.68-1.89)和3.60(1.47-8.80)(交互作用的P = 0.02)。


这个研究的重要意义在于,发现了eGFR的降低与ICH后的不利结局有关。

原文出处:
Fukuda-Doi M, Yamamoto H, Koga M, Doi Y, Qureshi AI, Yoshimura S, Miwa K, Ishigami A, Shiozawa M, Omae K, Ihara M, Toyoda K. Impact of Renal Impairment on Intensive Blood-Pressure-Lowering Therapy and Outcomes in Intracerebral Hemorrhage: Results From ATACH-2. Neurology. 2021 Jul 1:10.1212/WNL.0000000000012442. doi: 10.1212/WNL.0000000000012442. Epub ahead of print. PMID: 34210824.

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