Cardiovascular Research Centre, Royal Adelaide Hospital and Cardiac Unit, St Andrews Hospital, Adelaide, Australia. Electronic address: stephen.worthley@genesiscare.com.au. Department of Interventional Cardiology, Instituto Dante Pazzanese de Cardiologia, Cardiovascular Research Center, and Hospital Israelita Albert Einstein, São Paulo, Brazil. Department of Medicine, Columbia University Medical Center/New York-Presbyterian Hospital and the Cardiovascular Research Foundation, New York, New York. Department of Medicine-Cardiovascular Medicine, University Hospitals Cleveland Medical Center, Cleveland, Ohio. Department of Cardiology, Swiss Cardiovascular Center, Bern University Hospital, Bern, Switzerland. Clinical Research Department, Medtronic, Santa Rosa, California. Monash Health and Monash University, Melbourne, Australia. Department of Cardiology, Fiona Stanley Hospital, Murdoch, Australia, and University of Western Australia, Perth, Australia. Heart and Vascular Institute, Flinders Medical Centre, Bedford Park, Australia. Cardiovascular Imaging Core Lab, Beth Israel Deaconess Medical Center, Boston, Massachusetts.