Abstract
Observational studies have indicated potential benefits of CYP2C9- and VKORC1-guided dosing of warfarin but randomized clinical trials have resulted in contradictory findings. One of the reasons for contradiction may be the negligence of possible differences between warfarin indications. This study aims to determine efficacy and safety of genotype-guided and clinically guided dosing of warfarin in atrial fibrillation (AF), deep-vein thrombosis (DVT), and pulmonary embolism (PE) within the first 5 days after the introduction of therapy. In this single-center, single-blinded, randomized, controlled trial including patients of both sexes, ≥18 years of age, and diagnosed with AF, DVT, or PE, a total of 205 consecutive patients were allocated into the group where warfarin therapy was genotype-guided pharmacogenetics guided (PHG), and where it was adjusted according to the clinical parameters non pharmacogenetics guided (NPHG). Genotyping of CYP2C9*2, *3, and VKORC1 was performed using the real-time polymerase chain reaction method. The primary outcomes were the percentage of time in the therapeutic international normalized ratio (INR) (2.0-3.0) range and the percentage of patients who achieved a stable anticoagulation defined as the...Continue Reading
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