J Am Heart Assoc:吸烟/不吸烟的行PCI的ACS患者:双倍剂量vs标准剂量氯吡格雷

2017-11-28 何娜 环球医学

2017年11月,发表在《J Am Heart Assoc》的一项由加拿大、瑞士、美国等国科学家进行的研究比较了行经皮冠状动脉介入(PCI)的急性冠脉综合征(ACS)患者中,根据吸烟状态的双倍剂量和标准剂量氯吡格雷的效果。

2017年11月,发表在《J Am Heart Assoc》的一项由加拿大、瑞士、美国等国科学家进行的研究比较了行经皮冠状动脉介入(PCI)的急性冠脉综合征(ACS)患者中,根据吸烟状态的双倍剂量和标准剂量氯吡格雷的效果。

背景:既往研究显示,与接受氯吡格雷的非吸烟者相比,吸烟者的结局更佳(“吸烟者的悖论”)。仍不清楚强化剂量的氯吡格雷方案对需要PCI的ACS吸烟者的缺血和出血风险的影响。

方法和结果:研究者分析了CURRENT-OASIS 7(氯吡格雷和阿司匹林降低复发事件的最佳剂量使用-评价缺血症状策略的第7个组织)试验中的17263例行PCI的ACS患者。CURRENT-OASIS 7比较使用双倍剂量(第1天600 mg;第2至7天150 mg;然后每天75 mg)与标准剂量(第1天300 mg;然后每天75 mg)氯吡格雷的ACS患者。主要结局为30天心血管死亡、心梗或卒中。评价了治疗分配与吸烟状态(目前吸烟者vs非吸烟者)之间的相互作用。共计6394例患者(37.0%)为目前吸烟者。双倍剂量与标准剂量氯吡格雷相比,吸烟者和非吸烟者对首要结局(P=0.031)和大出血(P=0.002)存在显着的交互作用。双倍剂量与标准剂量氯吡格雷相比,使吸烟者的主要结局降低34%(风险比[HR] 0.66,95%置信区间[CI],0.50~0.87,P=0.003),而在非吸烟者中,没有明显获益(HR 0.96,95% CI,0.80~1.14,P=0.61)。吸烟者各组的大出血没有差异(HR 0.77,95% CI,0.48~1.24,P=0.28),而在非吸烟者中,双倍剂量氯吡格雷方案增加出血(HR 1.89,95% CI,1.37~2.60,P<0.0001)。双倍剂量氯吡格雷降低了吸烟者(HR 0.41,95% CI,0.24~0.71)和非吸烟者(HR 0.63,95% CI,0.42~0.93;交互作用P=0.19)明确的支架血栓的发生率。

结论:在吸烟者中,双倍剂量氯吡格雷方案降低了PCI后重大心血管事件和支架血栓,而不增加大出血事件。这表明ACS患者氯吡格雷使用剂量,应综合考虑缺血和出血风险并个体化给药方案。

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    2017-11-30 yaanren
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    2017-11-30 zhaojie88
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    2017-11-30 slcumt
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