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Current Vascular Pharmacology

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ISSN (Print): 1570-1611
ISSN (Online): 1875-6212

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Research Article

Antiplatelet Effect of Low-Dose Prasugrel in Elderly Patients Undergoing Percutaneous Coronary Interventions

Author(s): Monica Verdoia*, Matteo Nardin, Rocco Gioscia, Andrea Rognoni and Giuseppe De Luca

Volume 22, Issue 5, 2024

Published on: 05 June, 2024

Page: [335 - 341] Pages: 7

DOI: 10.2174/0115701611280276240529105022

Price: $65

Abstract

Background: Low-dose prasugrel (5 mg) has been proposed for patients with Acute Coronary Syndrome (ACS) and advanced age or low body weight. However, the routine use of dose-adjusted prasugrel in this high-risk subset of patients is still debated.

Aim: This study aimed to assess the prevalence and predictors of HRPR among elderly patients treated with low-dose (5 mg) prasugrel to evaluate the routine use of dose-adjusted prasugrel in this high-risk subset of patients.

Methods: We included 59 elderly patients (≥75 years) treated with Dual Antiplatelet Therapy (DAPT: acetylsalicylic acid (ASA) 100-160 mg + prasugrel 5 mg) after Percutaneous Coronary Interventions (PCI) and undergoing platelet function assessment (by whole blood impedance aggregometry) 30-90 days post-discharge.

Results: At a median follow-up of 43 days (interquartile range-IQR: 32-54), high-on treatment residual platelet reactivity (HRPR) occurred in 25 patients (42.4%), who displayed a greater body mass index (BMI) (p=0.02), lower levels of vitamin D (p=0.05) and were more frequently treated with nitrates (p=0.03). After multivariate analysis, BMI was the only independent predictor of prasugrel HRPR, and a BMI >26 was the best cut-off for predicting HRPR (adjusted Odds Ratio - OR=8.6, 95%CI: 2.2-33.9, p=0.002).

Conclusion: Among elderly patients receiving DAPT after PCI, HRPR is common with low-dose prasugrel. A greater BMI, especially for values ≥26, is the only independent predictor of HRPR with prasugrel 5 mg.

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