Impact of Baseline Platelet Count in Patients Undergoing Primary Percutaneous Coronary Intervention in Acute Myocardial Infarction (from the CADILLAC Trial)

医学 内科学 经皮冠状动脉介入治疗 心肌梗塞 心脏病学 传统PCI 危险系数 血小板 四分位数 置信区间
作者
Eugenia Nikolsky,Cindy L. Grines,David A. Cox,Eulogio Garcı́a,James E. Tcheng,Sadeghi Mehrdad,Roxana Mehran,Alexandra J. Lansky,Yingbo Na,Gregg W. Stone
出处
期刊:American Journal of Cardiology [Elsevier BV]
卷期号:99 (8): 1055-1061 被引量:147
标识
DOI:10.1016/j.amjcard.2006.11.066
摘要

Despite the well-recognized role of platelets in the pathogenesis of acute myocardial infarction (AMI) and in the vascular responses to angioplasty, the relation between platelet count and outcomes after primary percutaneous coronary intervention (PCI) in AMI is unknown. We therefore determined the effect of baseline platelet count on clinical and angiographic outcomes of patients with AMI undergoing primary PCI. In the prospective, randomized CADILLAC trial, platelet count on admission was available in 2,021 of 2,082 patients (97.0%). Angiographic results and outcomes at 30 days and 1 year were stratified by quartiles of platelet count. Median platelet count was 231 x 10(9)/L (range 38 to 709). Primary PCI angiographic success rates were independent of platelet count. The 30-day incidence of target vessel thrombosis or reocclusion increased steadily across the higher quartiles of baseline platelet count (0.2%, 0.6%, 1.0%, and 2.0%, p = 0.027). At 1 year, patients with a baseline platelet count >or=234 versus <234 x 10(9)/L had higher rates of death or reinfarction (8.9% vs 4.5%, p <0.0001), death (5.8% vs 3.1%, p = 0.002), and reinfarction (3.4% vs 1.6%, p = 0.008). By multivariable analysis, a higher baseline platelet count was the strongest predictor of 1-year death or reinfarction (hazard ratio [HR] per 10,000 increase in platelet count 1.02, 95% confidence interval [CI] 1.02 to 1.07, p <0.0001) and independently predicted reinfarction (HR 1.06, 95% CI 1.02 to 1.09, p = 0.002) and cardiac mortality (HR 1.03, 95% CI 1.00 to 1.06, p = 0.055) at 1 year. In conclusion, a higher baseline platelet count in patients with AMI is a powerful independent predictor of death and reinfarction within the first year after primary PCI.
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