ROCKET AF研究:肾功能不全房颤患者危险高

2011-09-06 医学论坛网 医学论坛网

 8月29日,在欧洲心脏病学会(ESC2011)临床研究更新会上,英国学者Keith A Fox报告的利伐沙班房颤卒中预防(ROCKET AF)随机双盲研究证实,中度肾功能不全的房颤患者卒中和出血的发生率高于正常肾功能房颤患者。在不同治疗剂量组间未发现明显差异。ROCKET AF研究利伐沙班剂量调整治疗的结果与华法林剂量调整治疗比较的总体研究结果一致。  

 8月29日,在欧洲心脏病学会(ESC2011)临床研究更新会上,英国学者Keith A Fox报告的利伐沙班房颤卒中预防(ROCKET AF)随机双盲研究证实,中度肾功能不全的房颤患者卒中和出血的发生率高于正常肾功能房颤患者。在不同治疗剂量组间未发现明显差异。ROCKET AF研究利伐沙班剂量调整治疗的结果与华法林剂量调整治疗比较的总体研究结果一致。

  非瓣膜性房颤(AF)和肾功能不全患者接受抗凝治疗时的缺血性卒中和出血危险增加。利伐沙班是一种口服Xa因子直接抑制剂,主要经肝脏代谢,该药能够维持华法林对卒中的预防作用,更少地引起颅内和致命性出血事件。

  研究共纳入14264例房颤患者,随机接受利伐沙班20 mg/d[如果肌酐清除率(CrCl)为30–49 ml/min,则调整为15 mg/d],或者剂量调整的华法林(目标国际标准化比值:2.0–3.0)治疗。

  结果显示,如果不考虑研究采用的治疗因素,相比于CrCl >50 ml/min(平均年龄73岁)的房颤患者,CrCl为 30–49 ml/min的2950例(占20.7%)房颤患者的年龄较大(平均年龄79岁),并具有更高的事件发生率。方案数据分析显示,CrCl为 30–49 ml/min的患者卒中和系统性栓塞主要终点的发生率,在利伐沙班15 mg/d治疗组为2.32/100患者-年,在华法林治疗组为 2.77/100患者-年[危险比(HR)为0.84;95%可信区间(CI)为0.57–1.23]。意向治疗分析也得出与方案数据分析相似的结果(HR为0.86;95%CI为0.63–1.17)。

  主要安全性终点事件率(严重出血和临床相关非严重出血:17.82比18.28/100患者-年;P=0.76)和颅内出血(0.71比 0.88/100患者-年;P=0.54)在利伐沙班和华法林治疗组间无显著性差异。致死性出血更少见于利伐沙班治疗组(0.28%比0.74%/100 患者-年;P=0.047)。

  链接:

  ROCKET AF: Prevention of stroke and systemic embolism using the oral direct factor Xa inhibitor Rivaroxaban compared with Warfarin in patients with nonvalvular atrial fibrillation and moderate renal impairment 

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    2011-10-20 linlin2312
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    2012-01-06 yese
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