From the Division of Imaging Sciences & Biomedical Engineering, King’s College London (J.L.H., C.S., N.W.L., R.K., S.E.W., K.S.R., J.G., C.A.R., M.W., T.S., R.S.R., M.D.O.), Department of Cardiology (J.L.H., N.W.L., S.E.W., J.G., M.C., C.A.R., M.W, M.D.O.), Guy’s and St. Thomas’ NHS Foundation Trust, London, United Kingdom. (At 2015-04)