 The study will be a single center, double-blind, prospective placebo controlled trial of 60 non-diabetic heart failure patients. Prior to administration of study medication, a medical history, physician exam, blood draw, laser Doppler imaging Periscan system, venous occlusion strain gauge plethysmography, metabolic exercise stress test and 2D and 3D echocardiograms will be performed. Patients will then be randomized to receive rosiglitazone 2mgday oral versus placebo with up-titration to 4mgday oral versus placebo at 3 months. Each study arm will have 30 patients who will participate for 6 months. Follow up assessments will be completed at 6 weeks, 3 months and 6 months post randomization. 