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Antiplatelet therapy: aspirin resistance and all that jazz!
Afshin A Divani1, Nicole D Zantek, Afshin Borhani-Haghighi
1Department of Neurology, University of Minnesota, Minneapolis, MN 55455, USA. divani@umn.edu
Insights
Aspirin resistance, a condition where aspirin is less effective, can reduce its benefits for patients at high risk of vascular events. Laboratory tests are being developed to identify this resistance, aiding in patient management.
Area of Science:
- Cardiovascular Medicine
- Pharmacology
- Hematology
Background:
- Platelets are key in atherosclerosis, thrombosis, and stroke.
- Aspirin and antiplatelet combinations benefit high-risk patients.
- Aspirin resistance can diminish treatment efficacy.
Purpose of the Study:
- To explore the challenges and methods for detecting aspirin resistance.
- To highlight the impact of aspirin resistance on patient outcomes.
- To identify strategies for managing aspirin resistance.
Main Methods:
- Review of laboratory methods for assessing aspirin resistance.
- Analysis of clinical and laboratory criteria for defining resistance.
- Consideration of noncompliance as a confounding factor.
Main Results:
- No single laboratory assay is currently sufficient to confirm aspirin resistance.
- Combining results may improve identification of true aspirin resistance.
- Noncompliance complicates the assessment of aspirin resistance.
Conclusions:
- Early laboratory detection of aspirin resistance offers intervention opportunities.
- Further research is needed to establish optimal management strategies for aspirin resistance.
- Ongoing studies aim to address the clinical implications of aspirin resistance.
Abstract:
Platelets play a crucial role in the pathogenesis of atherosclerosis, thrombosis, and stroke. Aspirin used alone or in combination with other antiplatelet drugs has been shown to offer significant benefit to patients at high risk of vascular events. Resistance to the action of aspirin may decrease this benefit. Aspirin resistance has been defined by clinical and/or laboratory criteria; however, detection by laboratory methods prior to experiencing a clinical event will likely provide the greatest opportunity for intervention. Numerous laboratory methods with different cutoff points have been used to evaluate the resistance. Noncompliance with aspirin treatment has also confounded studies. A single assay is currently insufficient to establish resistance. Combinations of results to confirm compliance and platelet inhibition may identify "at-risk" individuals who truly have aspirin resistance. The most effective strategy for managing patients with aspirin resistance is unknown; however, studies are currently underway to address this issue.
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