Background And Aim Of The Study: The American College of Cardiology/American Heart Association (ACC/AHA) guidelines recommend a three-month administration of warfarin following bioprosthetic valve replacement (BVR). However, strong evidence supporting this recommendation is lacking, making process variation likely.
Methods: In the ANSWER Registry, a total of 386 patients who had received either Epic or Biocor BVRs between May 2007 and August 2008 at 40 centers was enrolled.