TY - JOUR TI - Universal definition and classification of heart failure: a report of the Heart Failure Society of America, Heart Failure Association of the European Society of Cardiology, Japanese Heart Failure Society and Writing Committee of the Universal Definition of Heart Failure AU - Bozkurt, Biykem AU - Coats, Andrew J. S. AU - Tsutsui, Hiroyuki and AU - Abdelhamid, Ca Magdy AU - Adamopoulos, Stamatis AU - Albert, Nancy and AU - Anker, Stefan D. AU - Atherton, John AU - Boehm, Michael AU - Butler, Javed AU - and Drazner, Mark H. AU - Felker, G. Michael AU - Filippatos, Gerasimos AU - and Fiuzat, Mona AU - Fonarow, Gregg C. AU - Gomez-Mesa, Juan-Esteban and AU - Heidenreich, Paul AU - Imamura, Teruhiko AU - Jankowska, Ewa A. and AU - Januzzi, James AU - Khazanie, Prateeti AU - Kinugawa, Koichiro AU - Lam, AU - Carolyn S. P. AU - Matsue, Yuya AU - Metra, Marco AU - Ohtani, Tomohito and AU - Piepoli, Massimo Francesco AU - Ponikowski, Piotr AU - Rosano, Giuseppe M. AU - C. AU - Sakata, Yasushi AU - Starling, Randall C. AU - Teerlink, John R. AU - and Vardeny, Orly AU - Yamamoto, Kazuhiro AU - Yancy, Clyde AU - Zhang, AU - Jian AU - Zieroth, Shelley JO - European Journal of Heart Failure PY - 2021 VL - 23 TODO - 3 SP - 352-380 PB - Wiley SN - null TODO - 10.1002/ejhf.2115 TODO - Heart failure; Cardiomyopathy; HFrEF; HFpEF; HFmrEF; Stages of heart failure; Definition of heart failure TODO - In this document, we propose a universal definition of heart failure (HF) as a clinical syndrome with symptoms and/or signs caused by a structural and/or functional cardiac abnormality and corroborated by elevated natriuretic peptide levels and/or objective evidence of pulmonary or systemic congestion. We also propose revised stages of HF as: At risk for HF (Stage A), Pre-HF (Stage B), Symptomatic HF (Stage C) and Advanced HF (Stage D). Finally, we propose a new and revised classification of HF according to left ventricular ejection fraction (LVEF). This includes HF with reduced ejection fraction (HFrEF): symptomatic HF with LVEF <= 40%; HF with mildly reduced ejection fraction (HFmrEF): symptomatic HF with LVEF 41-49%; HF with preserved ejection fraction (HFpEF): symptomatic HF with LVEF >= 50%; and HF with improved ejection fraction (HFimpEF): symptomatic HF with a baseline LVEF <= 40%, a >= 10 point increase from baseline LVEF, and a second measurement of LVEF > 40%. ER -