[A current problem in atherothrombotic diseases--aspirin resistance: definition, mechanisms, determination with...

Area of Science:

• Cardiology
• Pharmacology
• Hematology

Context:

• Aspirin (acetylsalicylic acid) is a cornerstone antiplatelet medication for preventing atherothrombotic events.
• Patient response to aspirin therapy is variable, leading to the identification of aspirin resistance or non-response.
• Aspirin resistance poses a clinical challenge, potentially increasing cardiovascular event risk.

Purpose:

• To review the diagnostic methods for identifying aspirin resistance.
• To discuss the implications of aspirin resistance on cardiovascular outcomes.
• To highlight the need for further research into the mechanisms and management of aspirin resistance.

Summary:

• Aspirin resistance is defined by a lack of antiplatelet effect, detectable through various assays like aggregometry and platelet function analyzers.
• Several methods exist to assess aspirin resistance, including bleeding time, PFA-100, and thromboxane B2 levels.
• The precise mechanisms underlying aspirin resistance remain unclear, but it is linked to an increased risk of cardiovascular events.

Impact:

• Understanding aspirin resistance is crucial for tailoring antiplatelet therapy to individual patient needs.
• Identifying aspirin-resistant patients may allow for the implementation of alternative or additional therapies to mitigate cardiovascular risks.
• Further studies are essential to optimize antiplatelet strategies and reduce the incidence of major cardiovascular events in aspirin-resistant populations.