Derek V Exner, MD, MPH, FRCPC, is an Associate Professor in the Libin Cardiovascular Institute of Alberta at the University of Calgary, and Medical Director of the Tachyarrhythmia and Heart Failure Device Program in the Calgary Health Region. He is a heart rhythm specialist and clinical trials expert. His clinical work and research focus on device therapy for patients with heart failure and the non-invasive identification of people at risk for serious cardiac arrhythmias. Dr Exner’s research is supported by the Canadian Institutes of Health Research, the Alberta Heritage Foundation for Medical Research, the Heart and Stroke Foundation of Alberta, and a number of industry partners. He has authored or co-authored more than 150 articles, book chapters, and abstracts, including publications in leading medical journals such as the New England Journal of Medicine, the Journal of the American Medical Association, Circulation, and the Journal of the American College of Cardiology related to device therapy and heart failure.