April 2, 2009 - New findings from a landmark investigational study demonstrated that, for patients with atrial fibrillation who were at increased risk for stroke and could not take an oral anticoagulant (OAC) medication, taking Plavix (clopidogrel bisulfate) in addition to aspirin significantly reduced major vascular events by 11 percent over aspirin alone, at a median of 3.6 years of follow-up (6