Atrial Fibrillation Clinical Trial
Official title:
Creation and Validation of a Pharmacogenetic Dosage Algorithm for Acenocoumarol in Patients With Venous Thromboembolic Disease, Atrial Fibrillation and/or Mechanical Valvular Heart Prosthesis
The use of coumarins has been a challenge for doctors because of its narrow therapeutic range and they show great inter and intra-individual variability in the dose necessary to achieve an international normalized ratio (INR) within the therapeutic range. Among the factors influencing the interindividual variability in the dose required include age, weight, Vitamin K in the diet, comorbidity as well as drug interactions and in recent years has also seen the importance of pharmacogenetic factors.
Demographic and clinical factors contribute approximately 20% to the total variability of dose requirements. In recent years it has highlighted the close relationship between the dose requirements of coumarin drugs and certain polymorphisms of genes involved in pharmacokinetics and pharmacodynamics of these drugs. The use of dosing algorithms that include pharmacogenetic information may help in the dose selection, improving efficacy and reducing adverse events. Studies have shown the relationship between genotype variants of CYP2C9 and VKORC1, CYP4F2 and apolipoprotein E (ApoE), which together with the demographic and clinical variants can explain between 50-60% of the variability in the response to these drugs. ;
Observational Model: Cohort, Time Perspective: Prospective
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