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Vol. 117, No. 2, 2010
Issue release date: November 2010

Cytochrome P450 2C19 Polymorphism, Suboptimal Reperfusion and All-Cause Mortality in Patients with Acute Myocardial Infarction

Małek Ł.A. · Przyłuski J. · Śpiewak M. · Kłopotowski M. · Kostrzewa G. · Kruk M. · Płoski R. · Witkowski A. · Rużyłło W.
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Abstract

Objectives: To determine whether the 681 G>A (*2) polymorphism of cytochrome P450 (CYP2C19) is related to suboptimal reperfusion and mortality in patients with acute myocardial infarction (AMI) pretreated with clopidogrel. Methods: Thestudy included 276 consecutive patients with AMI in whom percutaneous coronary intervention (PCI) with stenting was attempted. Four-year follow-up for all-cause mortality was obtained. Results: There were 15 failed procedures (5.4%). In the remaining 261 patients, suboptimal reperfusion (post-PCI TIMI flow <3) was observed in 12.6% of the cases. There were 56 carriers (50 heterozygous and 6 homozygous) of CYP2C19*2. The prevalence of carriers in patients with suboptimal flow was 39.4% in comparison to 18.9% in the other patients (p = 0.01). Independent predictors of suboptimal reperfusion were initial TIMI flow ≤1 (OR = 5.9, 95% CI 2.2–16.2, p = 0.001) and CYP2C19*2 (OR = 2.9, 95% CI 1.3–6.6, p = 0.01). Thirty patients died during follow-up (11.5%). Four-year mortality tended to be higher in carriers of CYP2C19*2 (17.9%) versus non-carriers (9.8%; p = 0.09), but the only independent predictors of death were age (HR = 2.0, 95% CI = 1.4–2.8, p = 0.0001) and suboptimal reperfusion (HR = 3.6, 95% CI 1.5–8.8, p = 0.004). Conclusions: The CYP2C19*2 allele is an independent predictor of suboptimal reperfusion in patients with AMI undergoing PCI with stenting after pretreatment with clopidogrel and may increase the risk of all-cause mortality.



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