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Cardiol Ther ; 9(2): 493-503, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32766961

RESUMEN

INTRODUCTION: This prospective, pharmacodynamic study aimed to explore the potential applicability of a low-dose ticagrelor regimen in a heterogeneous Trinidadian subpopulation. METHODS: Patients with stable coronary artery disease (n = 25) who were actively treated with dual antiplatelet therapy of aspirin 81 mg daily and clopidogrel 75 mg daily were recruited. Platelet function was measured with the VerifyNow P2Y12 assay (Accriva Diagnostics, San Diego, CA, USA) and assessed before initiation of and after 14 days of treatment with a low-dose ticagrelor 45 mg twice daily maintenance dose regimen. Results were compared with a paired t test. RESULTS: The mean P2Y12 reaction units (PRU) score on ticagrelor was significantly less compared to that of clopidogrel (50.4, 95% confidence interval (CI) 29-73.9; vs. 149.6, 95% CI 129.4-169.9; p value < 0.001). Of the patients, 4% experienced Medical Research Council class 1 dyspnea, and Bleeding Academic Research Consortium class 1 bleeding on the ticagrelor regimen (one patient each). CONCLUSIONS: Significantly attenuated platelet reactivity was seen on the low ticagrelor maintenance dose as compared to clopidogrel. This dedicated pharmacodynamic study could be applicable and informative for Trinidadian stable coronary artery disease patients. Further studies are required to confirm these exploratory findings.(Funded by the University of the West Indies, St. Augustine). TRIAL REGISTRATION: ClinicalTrials.gov number NCT04206176.

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