This video discusses how significant excess bleeding halted a trial of idraparinux for stroke prevention in patients with atrial fibrillation.

References and Resources
The Amadeus Investigators. Comparison of idraparinux with vitamin K antagonists for prevention of thromboembolism in patients with atrial fibrillation: a randomised, open-label, non-inferiority trial. The Lancet 2008; 371:315-321.

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