Mark W.Russell, M.D. is a board certified Pediatric Cardiologist with a busy clinical practice and research program. Dr. Russell provides the Pediatric Cardiology services for the Hypertrophic Cardiomypathy Program and the Multidisciplinary Muscular Dystrophy Clinic. He directs clinical research studies examining the effect of genetic factors on post-operative outcomes and is the site principal investigator for a multicenter, clinical trial evaluating a new potential treatment for protein-losing enteropathy. He is the director of a biorepository for a multicenter clinical trial sponsored by the Pediatric Heart Network and is a member of the Heart Network's panel that oversees the acquisition and study of biologic samples from patients with congenital heart defects. In addition, he directs a busy laboratory that examines the effects of the extracellular environment on the differentiation of immature cells into cardiac myocytes.