The perils of inhibiting deficient factors
2018
: Essentials Anticoagulation in patients with factor X deficiency is an evidence-poor area. A patient with factor X deficiency was anticoagulated with warfarin followed by rivaroxaban. Warfarin may be a safer anticoagulant option than rivaroxaban in hereditary factor X deficiency. A baseline coagulation screen should be performed prior to commencement of anticoagulation. SUMMARY: We report a case of a previously undiagnosed factor X deficiency in an 83-year-old man who had no previous bleeding history despite multiple hemostatic challenges. He was anticoagulated with warfarin for atrial fibrillation without bleeding complications; however, major hemorrhage occurred soon after a switch to rivaroxaban.
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