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- W2077682761 abstract "AZD0837 and ximelagatran are oral direct thrombin inhibitors that are rapidly absorbed and bioconverted to their active forms, AR-H067637 and melagatran, respectively. This study investigated the antithrombotic effect of AZD0837, compared to ximelagatran and the vitamin K antagonist (VKA) phenprocoumon (Marcoumar), in a disease model of thrombosis in patients with non-valvular atrial fibrillation (NVAF).Open, parallel-group studies were performed in NVAF patients treated with VKA, which was stopped aiming for an international normalized ratio (INR) of ≤ 2 before randomization. Study I: 38 patients randomized to AZD0837 (150,250 or 350 mg) or ximelagatran 36 mg twice daily for 10-14 days. Study II: 27 patients randomized to AZD0837 250 mg twice daily or VKA titrated to an INR of 2-3 for 10-14 days. A control group of 20 healthy elderly subjects without NVAF or anticoagulant treatment was also studied. Size of thrombus formed on pig aorta strips was measured after a 5-minute perfusion at low shear rate with blood from the patient/control subject.Thrombus formation was inhibited by AZD0837 and ximelagatran. Relative to untreated patients, a 50% reduction of thrombus size was estimated at plasma concentrations of 0.6 and 0.2 μmol/L for AR-H067637 and melagatran, respectively. For patients receiving VKA treatment, the thrombus size was about 15% lower compared with healthy elderly controls.Effects of AZD0837 and ximelagatran on thrombus formation were similar or greater than for VKA therapy and correlated with plasma concentrations of their active forms." @default.
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- W2077682761 date "2012-04-01" @default.
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- W2077682761 title "Effect on perfusion chamber thrombus size in patients with atrial fibrillation during anticoagulant treatment with oral direct thrombin inhibitors, AZD0837 or ximelagatran, or with vitamin K antagonists" @default.
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- W2077682761 doi "https://doi.org/10.1016/j.thromres.2011.08.018" @default.
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