1. From the UBC Department of Medical Imaging, Centre for Heart Valve Innovation, St Paul’s Hospital and University of British Columbia, 1081 Burrard St, Vancouver, BC, Canada V6Z 1Y6 (J.R.W.M., P.B., J.L.); Department of Cardiology, Concord Hospital, The University of Sydney, Sydney, Australia (C.N.); and Department of Cardiology, Leiden University Medical Center, Leiden, the Netherlands (V.D., J.J.B.).