Impact of CYP2C19 gene polymorphisms on clinical outcomes in patients with myocardial infarction during 60 months of follow-up

Objective: To evaluate the effect of CYP2C19 gene polymorphisms on clinical outcomes in patients after successful revascularization for acute myocardial infarction with and without ST segment elevation during clopidogrel therapy for 60 months of follow-up.Methods: From 2011 to 2012, 363 patients with acute myocardial infarction who underwent coronary revascularization were included in the study. In the postoperative period, the patients underwent genetic analysis for the CYP2C19 gene polymorphism. All patients received dual antiplatelet therapy with aspirin and clopidogrel. The 60-month follow-up period assessed the primary composite endpoint of the cumulative incidence of all-cause mortality, recurrent myocardial infarction, and stroke.Results: At 60 months after the initial intervention, 71 patients had a composite primary endpoint event (all-cause death, recurrent myocardial infarction, or stroke): 50 (20%, 95% CI 16–25) in the group patients with "wild genotype" and 21 patients of the "loss of function (LOF) *2+*3" group (19%, 95% CI 13–27). No significant relationship was observe between carriage of LOF alleles of the CYP2C19 and the primary endpoint during the 60-month follow-up (HR 0.99, 95% CI 0.59–1.65, P = .965), as well as between carriage of the homozygous CYP2C19 variant (*2/*2) and the development of myocardial infarction during the same period (HR 1.26, 95% CI 0.30–5.20, P = .752).Conclusion: No correlation was observed between the CYP2C19 gene polymorphisms (*2, *3 alleles) and the incidence of ischemic events in patients with myocardial infarction after myocardial revascularization throughout a 60-month follow-up period. Received 27 November 2022. Revised 25 September 2023. Accepted 26 September 2023. Funding: The study did not have sponsorship. Conflict of interest: The authors declare no conflict of interest. Contribution of the authorsConception and study design: I.O. GrazhdankinData collection and analysis: I.O. GrazhdankinStatistical analysis: V.L. LukinovDrafting the article: I.O. Grazhdankin, A.A. Prokhorikhin, V.I. Baystrukov, E.I. Kretov, V.L. LukinovCritical revision of the article: A.M. ChernyavskiyFinal approval of the version to be published: I.O. Grazhdankin, A.A. Prokhorikhin, V.I. Baystrukov, E.I. Kretov, A.M. Chernyavskiy, V.L. Lukinov