About Atrial FibrillationAtrial fibrillation is the most common cardiac arrhythmia (irregular heart beat). It is estimated that approximately 6 million individuals in Europe have atrial fibrillation. The lifetime risk of developing atrial fibrillation is estimated to be approximately 25% for individuals 40 years of age or older. One of the most serious medical concerns for individuals with atrial fibrillation is the increased risk of stroke, which is five times higher in people with atrial fibrillation than those without atrial fibrillation. In fact, atrial fibrillation is responsible for 15-20% of all ischaemic strokes and 45 percent of all embolic strokes in Europe. Atrial fibrillation-related strokes are more severe than other strokes, with an associated 30-day mortality of 24% and a 50% likelihood of death within one year in patients who are not treated with an antithrombotic. About ELIQUIS ELIQUIS is an oral direct Factor Xa inhibitor, part of a new therapeutic class. By inhibiting Factor Xa, a key blood clotting protein, ELIQUIS prevents thrombin generation and blood clot formation. ELIQUIS is the approved trade name for apixaban in Europe and the proposed trade name in the U.S. ELIQUIS is not yet approved for the prevention of stroke or systemic embolism in patients with atrial fibrillation outside of the EU. In May 2011, Bristol-Myers Squibb and Pfizer announced the first regulatory approval for ELIQUIS in the 27 countries of the European Union for the prevention of venous thromboembolic events (VTE) in adult patients who have undergone elective hip or knee replacement surgery, at a dose of 2.5 mg twice daily. ELIQUIS is also being investigated in Phase 3 trials for the acute and extended treatment of VTE. About the Bristol-Myers Squibb/Pfizer Collaboration In 2007, Pfizer and Bristol-Myers Squibb entered into a worldwide collaboration to develop and commercialize ELIQUIS, an investigational oral anticoagulant discovered by Bristol-Myers Squibb. This global alliance combines Bristol-Myers Squibb's long-standing strengths in cardiovascular drug development and commercialisation with Pfizer’s global scale and expertise in this field.