摘要
目的:在一个冠状动脉支架置入患者连续队列中,评价氯吡格雷的低反应是否影响冠状动脉支架置入术后的心血管预后。方法和结果:共纳入接受经皮冠状动脉支架置入术的连续379例有症状性冠心病(CAD)患者(稳定性心绞痛206例,急性冠状动脉综合征173例)。
Aims: To assess whether low response to clopidogrel influences cardiovascular outcome after coronary stent implantation in a consecutively measured cohort of patients with coronary stent implantation. Methods and results: A total of 379 consecutive patients with symptomatic coronary artery disease (CAD), (stable angina n=206 and acute coronary syndrome, n=173) treated with percutaneous coronary stenting were enrolled in this trial. Responsiveness to clopidogrel was assessed by ADP (20 μmol/L) induced aggregometry at least 6 h (mean 34.8±25.9 h) after administration of a loading dose of 600 mg clopidogrel. Platelet inhibition < 30%was defined as low response to clopidogrel. At 3-month follow-up, the primary outcome of a combined major cardiovascular event including non-fatal myocardial infarction, non-fatal ischaemic stroke, or cardiovascular death was evaluated. Twenty-two patients (5.8%) were classified as low responders. Compared with patients who adequately responded to clopidogrel, a low responder had a significantly higher risk of major cardiovascular events [22.7 vs. 5.6%; odds ratio, 4.9; 95%confidence interval (CI), 1.66-14.96; P=0.004]. After adjustment for other factors influencing cardiovascular outcome, low response to clopidogrel and severe left ventricular dysfunction were independently associated with a major cardiovascular event within 3 months(hazard ratio for low response to clopidogrel, 3.71; 95%CI, 1.08-12.69; P=0.037). Conclusion: Low response to clopidogrel in patients with symptomatic CAD treated by stenting significantly enhances the occurrence of cardiovascular events and death. The evaluation of low response to clopidogrel may help to identify patients at increased risk who may benefit from intensified antiplatelet strategy.
