Conceptual Models to Explain Heart Failure With a Preserved Ejection Fraction: A Tale of Futility, Frustration, and Perhaps, Fruition

Milton Packer

From Baylor University Medical Center, Dallas (M.P.); Imperial College, London (M.P.); RHJ Department of Veterans Affairs, Health System and Medical University of South Carolina, Charleston (M.R.Z., S.E.L.); the Cardiovascular Division, Department of Medicine, University of Virginia Health System, Charlottesville (C.M.K.); Flourish Research, Boca Raton, FL (S.J.B.); the Department of Cardiovascular Medicine, Cleveland Clinic Foundation, Cleveland (V.M.); the Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China (J.G.); Eli Lilly, Indianapolis (G.J.W., Y.O., M.C.B., K.C.H., M.M.); and the Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN (B.A.B.).