Correlation of clinical and laboratory aspirin resistance: A pilot study

Prashant, CK and Vidyasagar, Sudha and Varma, Muralidhar and Bairy, Laxminarayana K and Kurien, Annamma and Kamath, Ashwin KA (2009) Correlation of clinical and laboratory aspirin resistance: A pilot study. JPRHC, 1 (2). pp. 157-171.

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Abstract

Aspirin resistance may be biochemical or clinical. Data related to the presence of aspirin resistance in the Indian population is scarce. We conducted a cross sectional study to address the issue of clinical aspirin non responsiveness and to assess the association between inhibition of platelet aggregation, clinical risk factors and occurrence of vascular events. We studied platelet aggregation by optical aggregometry in 20 patients on aspirin. No patient was found to be aspirin-resistant on the basis of previously defined criteria. This led us to relook at the current cut offs for resistance, and an analysis of 60 normal patients showed lower cut off values suggesting ethnic variability. The data was reanalyzed using these cutoffs. An association between poor clinical aspirin response, older age, male sex, smoking and dyslipidemia was found, suggesting a trend, though not significant. 25% of patients had vascular events on aspirin suggesting clinical aspirin resistance. A lower cut off value for aspirin resistance in normal Indians may be needed to detect true prevalence of this entity. In patients with multiple atherothrombotic risk factors lab detection of resistance may be useful in identifying patients with high risk for recurrent vascular events. This may help to modify antiplatelet therapy to prevent vascular events.

Item Type: Article
Uncontrolled Keywords: aspirin, platelet function, clinical correlation, risk factors.
Subjects: Medicine > KMC Manipal > Pharmacology
Depositing User: KMC Manipal
Date Deposited: 24 Nov 2011 04:23
Last Modified: 24 Nov 2011 04:23
URI: http://eprints.manipal.edu/id/eprint/1757

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