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Advances in monitoring of aspirin therapy
1Centre for Cardiovascular Sciences, Institute of Biomedical Research, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK. m.lordkipanidze@bham.ac.uk
Insights
Aspirin effectively prevents cardiovascular events but carries bleeding risks. Monitoring platelet function may personalize aspirin therapy to maximize benefits and minimize bleeding complications.
Area of Science:
- Cardiology
- Pharmacology
- Hematology
Background:
- Aspirin is proven to reduce vascular death by ~15% and non-fatal events by ~30% in cardiovascular patients.
- Aspirin's benefit is countered by a dose-dependent increase in bleeding risk.
- Guidelines recommend the lowest effective aspirin dose to mitigate bleeding, necessitating therapy monitoring.
Purpose of the Study:
- To review the utility of platelet function testing in patients on aspirin therapy.
- To explore the clinical impact of variable platelet reactivity to aspirin.
- To discuss mechanisms of suboptimal platelet inhibition and future management strategies for aspirin therapy.
Main Methods:
- Review of recent literature on platelet function assays in aspirin-treated patients.
- Analysis of studies examining aspirin's impact on platelet reactivity.
- Discussion of clinical outcomes related to aspirin response variability.
Main Results:
- Platelet function testing shows variability in aspirin's antiplatelet effect among patients.
- Suboptimal platelet inhibition can occur due to various mechanisms.
- Personalized aspirin dosing based on platelet function may optimize outcomes.
Conclusions:
- Platelet function testing offers potential for personalized aspirin therapy.
- Understanding variability in aspirin response is crucial for managing cardiovascular risk and bleeding.
- Further research is needed to refine aspirin management strategies.
Abstract:
The efficacy of aspirin to prevent thrombotic events in cardiovascular patients is well established, with >100 randomized trials having been conducted in high-risk patients and demonstrating a reduction in vascular death of approximately 15% and a further reduction in non-fatal vascular events of approximately 30%. While the benefit of aspirin is undisputed, it is also known that aspirin is associated with a dose-dependent increase in the risk of bleeding. It follows that most treatment guidelines advocate the use of the lowest aspirin dose effective in preventing thrombotic complications to minimize the risk of major bleeding. From this, a need for monitoring of aspirin therapy has emerged and prompted the development and investigation of numerous assays of platelet function. The intention behind monitoring of aspirin's antithrombotic effects is to maximize benefit and to personalize treatment based on individual patient characteristics. This article reviews the recent literature on the usefulness of platelet function testing in patients requiring aspirin; the variability of platelet reactivity in patients taking aspirin and its clinical impact; the potential mechanisms underlying suboptimal platelet inhibition by aspirin and future directions in terms of management of aspirin therapy.
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