IJCS | Volume 33, Nº1, January / February 2019

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References Study Association This article is part of the Thesis of monograph of the work of conclusion of the residency in cardiology submitted by Gabriela Paiva Cavalcanti, from Real Hospital Português de Beneficência de Recife . Ethics approval and consent to participate Th i s s t udy wa s app r oved by t h e E t h i c s Committee of the Centro de Pesquisa da Universidade Católica de Pernambuco under the protocol number 70897517.8.0000.5206. All the procedures in this study were in accordance with the 1975 Helsinki Declaration, updated in 2013. Informed consent was obtained from all participants included in the study. Cavalcanti et al. Decompensated heart failure with intermediate ejection fraction Int J Cardiovasc Sci. 2020;33(1):45-54 Original Article