Outcomes associated with warfarin use in older patients with heart failure and atrial fibrillation and a cardiovascular implantable electronic device: findings from the ADHERE registry linked to Medicare claims.

BACKGROUND Warfarin use and associated outcomes in patients with heart failure and atrial fibrillation and a cardiovascular implantable electronic device have not been described previously. HYPOTHESIS We hypothesized that warfarin is underused and is associated with lower risks of mortality, thromboembolic events, and myocardial infarction. METHODS… CONTINUE READING