Use of anticoagulant drug after aortic valve replacement lowers mortality risk, Mayo Clinic study finds

December 11, 2023- Patients who received the anticoagulant drug warfarin after bioprosthetic aortic valve replacement had lower incidence of mortality and a decreased risk of blood clots, according to a retrospective study published in Mayo Clinic Proceedings.

The use of bioprosthetic aortic valve replacement has increased significantly during the past decade. Among its advantages is that most patients can avoid warfarin for anticoagulation treatment. Even so, research has been conflicting on whether patients would benefit from more aggressive early postoperative anticoagulation treatment.

Mayo Clinic researchers analyzed nationwide data on more than 10,000 patients who underwent bioprosthetic aortic valve replacement. Warfarin use was associated with a 32% reduction in mortality risk. Patients treated with warfarin early postoperatively also had an increased risk of major bleeding events.

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