Patients’ time in therapeutic range on warfarin among atrial fibrillation patients in Warfarin Medication Therapy Adherence Clinic

BACKGROUND The quality of warfarin therapy can be determined by the time in the therapeutic range (TTR) of international normalized ratio (INR). The estimated minimum TTR needed to achieve a benefit from warfarin therapy is ≥ 60%. AIM To determine TTR and the predictors of poor TTR among atrial fibrillation patients who receive warfarin therapy. METHODS A retrospective observational study was conducted at a cardiology referral center in...