1. From the Division of Cardiology (L.M., R.A.d.K., K.Y., I.G.B., H.H., D.S.B., R.S.B.B.), University of Ottawa Heart Institute, Ottawa, Ontario, Canada; Department of Radiology (C.D.), Ottawa Hospital, Ottawa, Ontario, Canada; and Department of Nuclear Medicine (F.B.), Université de Sherbrooke, Sherbrooke, Quebec, Canada.