 - The investigators are conscious that improvement in LV function and morphology has not been previously shown with vitamin D therapy in human subjects. However, evidence of genomic effects of vitamin D on cardiac myocytes, extracellular matrix and myocardial contractility are well established in animal studies. Most importantly, this study explores a novel anti-fibrotic mechanism of vitamin D therapy in humans, which could provide the proof of principle for use of vitamin D in other disease states such as autoimmune disorders. 