Left atrial deformation analysis by speckle tracking echocardiography to predict exercise capacity after myocardial infarction

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Fontes-Carvalho R (Autor) FMUP; Sampaio, F (Autor) FMUP; Teixeira, M (Autor) Outra; Ruivo, C (Autor) Outra; Ribeiro, J (Autor) Outra; Azevedo A (Autor) FMUP; Leite-Moreira AF (Autor) FMUP; Ribeiro, VG (Autor) Outra

Revista

Título: Revista Portuguesa de Cardiologia

Vol. 37

Páginas: 821-830

ISSN: 0870-2551

Editora: Sociedade Portuguesa De Cardiologia

Indexação

ISI Web of Knowledge - 10 Citações

Scopus - 11 Citações

Outras Informações

ID Authenticus: P-00P-P24

DOI: 10.1016/j.repc.2017.10.018

Abstract (EN): Introduction: Left atrial (LA) size and function are associated with outcome after myocardial infarction (MI). In this study we aimed to assess the impact of LA function as a predictor of exercise capacity through speckle tracking echocardiography. Methods: A total of 94 patients (mean age 54.8 +/- 11.0 years; 82% male) were enrolled one month after MI. Echocardiography was used to assess LA volumes and various indices of LA conduit, contraction and reservoir function. LA deformation was assessed by two-dimensional speckle tracking to calculate strain and strain rate at different phases of the cardiac cycle. Exercise capacity was assessed by oxygen uptake (VO2) on cardiopulmonary exercise testing. Results: Increased LA volumes, especially LA volume before atrial contraction, were correlated with reduced peak VO2 and reduced VO2 at anaerobic threshold. Decreased peak VO2 was associated with reduced LA conduit function (p=0.24; p=0.02), but not with LA booster function (p=-0.07; p=0.53). Lower peak atrial longitudinal strain was associated with worse exercise capacity (p=0.24; p=0.02). Conclusions: After MI, increased LA volumes were markers of decreased functional capacity that was associated with decreased LA conduit function, but not with LA contractile function. In these patients, LA longitudinal strain analysis may be useful to predict reduced exercise capacity. (C) 2018 Sociedade Portuguesa de Cardiologia. Published by Elsevier Espana, S.L.U.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10