Following medical school, Dr. Alexander completed a pediatric residency in Hawaii and then served four years as an Army Pediatrician in rural Louisiana. He returned to Boston for a fellowship in pediatric cardiology and completed additional training in electrophysiology, which included serving as Chief Fellow. Since 1996, he has been a director of the Exercise Physiology Program and joined the Arrhythmia Service in 1998. One aspect of his clinical work focuses on arrhythmias in children from fetal life to well into adulthood for those with congenital heart disease. This focus has been part of numerous research papers and presentations on the risks and benefits of therapy. He performs catheter ablations, manages pacemakers and ICDs and assists in balancing therapy options for arrhythmias. A second aspect has been to serve as liaison with neurology, anesthesia and the emergency room in evaluating potential cardiac concerns in patients. This has developed shared expertise in patients with problematic syncope syndromes, Rett’s Syndrome, and congenital central hypoventilation. More recently, Dr. Alexander has been serving on the Institutional Review Board and on the Unexplained Diagnoses Taskforce. He currently directs the New England-wide Systematic Clinical Assessment and Management Program (SCAMP) on syncope.