PLos One:手术高危主动脉瓣狭窄患者的TAVI治疗

2018-05-13 xiangting MedSci原创

长达5年的随访期间,手术高危患者TAVI和SAVR的全因死亡率没有显著差异,但在无法手术的患者中,TAVI优于药物治疗。

症状性主动脉瓣狭窄预后差。许多患者因为年龄、合并症和虚弱程度,被认为无法手术或手术主动脉瓣置换术(SAVR)风险高。对于这些手术风险高的患者,目前尚未系统地评估TAVI的临床疗效和安全性。这项系统评价比较了这些风险组TAVI或其他治疗后长达5年的死亡率和其他重要临床结局。

该系统评价在PROSPERO数据库上进行了注册(CRD42016048396)。检索了Cochrane图书馆、检索和传播数据库中心、MEDLINE、EMBASE和ZETOC 2002年1月至2016年8月间发表的研究。纳入比较无法手术或高危AS患者TAVI和其他治疗手段的临床试验或配对研究。数据提取和质量评估由两位评估者进行。使用随机效应meta分析进行数据汇总。主要结局是全因死亡率、疗效和主要并发症。

纳入了3项质量良好的随机对照试验(RCTs)。患者的平均年龄在83-85岁之间,其中约一半是女性,纽约心脏协会(NYHA)功能分级III或IV级,范围从83.8%至94.2%,并伴有频繁的合并症。来自一项RCT的358例无法手术患者,TAVI的1年全因死亡率(危险比(HR)0.58,95%可信区间(CI)0.36-0.92),2年全因死亡率(HR 0.50,95%CI 0.39-0.65),3年全因死亡率(HR 0.53,95%CI 0.41-0.68),5年全因死亡率(HR 0.50,95%CI 0.39-0.65),2年的NYHA III或IV级(TAVI为16.8%(16/95),药物治疗为57.5%(23/40),p<0.001),生活质量和再住院率均优于药物治疗。TAVI的1年大出血,3年卒中(1年11.2%vs 5.5%,p = 0.06;2年HR 2.79,95%CI 1.25-6.22;3年HR 2.81,95%CI 1.26-6.26)和3年大血管并发症(HR 8.27,95%CI 2.92-23.44)风险升高。使用GRADE工具,该证据质量中等。在一项meta分析中,纳入来自两项非劣效RCTs的1,494例手术高风险患者,结果显示TAVI和SAVR的2年全因死亡率(HR 1.03,95%CI 0.82-1.29)和5年全因死亡率(HR 0.83,95%CI 0.83-1.12)无显著差异。任何时间点的大血管并发症和心梗,不同定义的大出血事件的差异性结果和卒中均无显著统计学差异。使用GRADE工具,这个证据被认为是低质量的。

未经治疗的症状性主动脉瓣狭窄会致死,但对于某些患者不能进行手术,一些患者手术风险高。这项研究证明,长达5年的随访期间,手术高危患者TAVI和SAVR的全因死亡率没有显著差异,但在无法手术的患者中,TAVI优于药物治疗。对于这些手术高危人群,TAVI是一种可行的延长生命的治疗方案。

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