Antiplatelet Resistance-Does it Exist and How to Measure it?

Area of Science:

• Cardiology
• Pharmacology
• Clinical Pathology

Background:

• Aspirin and clopidogrel are standard antiplatelet therapies for coronary artery disease.
• Patient resistance to these drugs poses a clinical challenge, impacting treatment efficacy.
• Development of novel antiplatelet agents is ongoing to address resistance issues.

Purpose of the Study:

• To review the evidence for antiplatelet resistance in laboratory and clinical settings.
• To evaluate current diagnostic tests for antiplatelet resistance and their limitations.
• To explore the potential for developing improved, clinically applicable tests for patient risk stratification.

Main Methods:

• Review of existing literature on antiplatelet resistance and diagnostic methods.
• Discussion of platelet function tests, including platelet aggregometry.
• Analysis of the correlation between laboratory findings and clinical outcomes.

Main Results:

• Evidence supports the existence of antiplatelet resistance in patients with coronary artery disease.
• Platelet aggregometry, the current gold standard, is operator-dependent and shows limited correlation with other tests.
• A need exists for simple, rapid, and affordable near-patient tests for clinical use.

Conclusions:

• Antiplatelet resistance is a significant clinical issue in managing coronary artery disease.
• Current gold-standard tests have limitations, hindering widespread clinical application.
• Development of accessible point-of-care tests is crucial for risk stratification and personalized antiplatelet therapy.