than the average improvement shown with the historical cohorts of CI monotherapy. 5 CONCLUSIONFurther research needs to be conducted in randomized, double-blind, controlled trials to explore the possibility of combined CI therapy for the advanced treatment of mixed dementia.

Background: Under utilization of warfarin in elderly patients with atrial fibrillation (AF) has been recognized as a significant health care issue. This study examines the rate and reasons for warfarin underutilization in elderly patients with AF at the Kansas City Veterans Affairs Medical Center.