Neurology:双联抗血小板治疗持续时间与出血风险

2018-03-19 杨中华 脑血管病及重症文献导读

抗血小板药物广泛用于心血管病的二级预防。尽管能够降低缺血事件的复发,抗血小板药物会增加严重出血的风险(1% - 1.5%/y)。尽管这个风险较小,一旦发生出血往往预后不良,增加全因和心血管死亡风险。鉴于抗血小板药物的广泛应用以及其出血风险,进一步认识抗血小板药物的安全性是非常重要的。

抗血小板药物广泛用于心血管病的二级预防。尽管能够降低缺血事件的复发,抗血小板药物会增加严重出血的风险(1% - 1.5%/y)。尽管这个风险较小,一旦发生出血往往预后不良,增加全因和心血管死亡风险。鉴于抗血小板药物的广泛应用以及其出血风险,进一步认识抗血小板药物的安全性是非常重要的。

在以前的一级预防试验中,与安慰剂相比阿司匹林大出血的风险随着时间逐渐降低,之所以出现这个时间过程,这主要是因为阿司匹林使用早期出血风险太高。为了探讨脑缺血患者服用抗血小板药物(包括单抗和双抗)出血风险的时间过程,2018年2月来自荷兰的Nina A. Hilkens等在Neurology上公布了他们的研究结果。

他们对6项随机临床试验进行了事后分析,这六项试验包括CAPRIE、ESPS-2、MATCH、CHARISMA、ESPRIT和PRoFESS,共45195例TIA或非心源性缺血性卒中患者。按照从随机的时间开始进行分层(≤30, 31–90, 91–180, 181–365, >365 天),研究者计算了每个分层每个抗血小板药物的出血发生率。

结果发现阿司匹林+氯吡格雷以及阿司匹林+双嘧达莫在随机前30天内严重出血的发生率最高,分别为5.8和4.9/100人-年,皆明显高于随机31-90天的出血率(阿司匹林+氯吡格雷:RR 1.98, 95% CI 1.16–3.40; 阿司匹林+双嘧达莫:RR 1.94, 95% CI 1.24–3.03)。在随机前30天内,阿司匹林和氯吡格雷单抗治疗的出血发生率分别为2.8和2.5/100人-年,并且随着时间出血率没有明显变化。对于胃肠道出血,时间过程类似。无论是双抗还是单抗,皆未发现早期过度颅内出血率。

最终作者认为,双抗与早期高发严重和胃肠道出血有关,随机第一个月后其风险逐渐下降。

原始出处:

Hilkens NA,et al.Early time course of major bleeding on antiplatelet therapy after TIA or ischemic stroke.Neurology. 2018 Feb 20;90(8):e683-e689.

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