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- W190033982 abstract "Summary The optimal intensity of oral anticoagulant therapy for the prevention of thromboembolism in patients with antiphospholipid antibodies (APLA) and systemic lupus erythematosus is controversial. Retrospective studies have suggested that patients with APLA are resistant to oral anticoagulant therapy, with a targeted International Normalization Ratio (INR) of 2.0 to 3.0, and that a higher intensity of anticoagulation (INR: 2.6 to 4.5) is required to prevent recurrent thromboembolism. To investigate if patients with APLA are resistant to the anticoagulant effect of low intensities of warfarin therapy, we performed a randomized trial in which 21 patients with APLA and systemic lupus erythematosus were allocated to receive one of three intensities of warfarin (INR: 1.1 to 1.4, 1.5 to 1.9 or 2.0 to 2.5) or placebo for four months. The main outcome was the effect of each intensity of warfarin therapy on prothrombin fragment 1+2 level (F1+2), that was used as a marker of coagulation activation. When F1+2 levels in patients allocated to the three warfarin intensities were compared to F1+2 levels in the placebo group, there was a statistically significant decrease (p <0.05) in the patient group receiving warfarin with a targeted INR of 2.0 to 2.5 at two, three and four months, and in the patient group with a targeted of INR 1.5 to 1.9 at three months. We conclude that in patients with APLA and systemic lupus erythematosus, warfarin therapy, with a targeted INR of 2.0 to 2.5, is effective in suppressing coagulation activation, and therefore, might be effective in preventing thromboembolism." @default.
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- W190033982 date "1999-01-01" @default.
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- W190033982 title "The Effects of Low-intensity Warfarin on Coagulation Activation in Patients with Antiphospholipid Antibodies and Systemic Lupus Erythematosus" @default.
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- W190033982 doi "https://doi.org/10.1055/s-0037-1614324" @default.
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