Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

INTRODUCTION AND OBJECTIVES: Left atrial dysfunction in aortic stenosis may precede atrial enlargement and predict the occurrence of atrial fibrillation (AF). To test this hypothesis, we assessed left atrial function and determined its impact on the incidence of AF after aortic valve replacement. METHODS: A total of 149 severe aortic stenosis patients (74±8.6 years, 51% men) with no prior AF were assessed using speckle-tracking echocardiography. Left atrial function was evaluated using peak atrial longitudinal strain (PALS), peak atrial contraction strain (PACS), and phasic left atrial volumes. The occurrence of AF was monitored in 114 patients from surgery until hospital discharge. RESULTS: In multiple linear regression, PALS and PACS were inversely correlated with left atrial dilation, left ventricular hypertrophy, and diastolic function. Atrial fibrillation occurred in 36 patients within a median time of 3 days [interquartile range, 1-4] after aortic valve replacement. In multiple Cox regression, PALS and PACS were independently associated with the incidence of AF (HR, 0.946; 95%CI, 0.910-0.983; P=.005 and HR, 0.932; 95%CI, 0.883-0.984; P=.011, respectively), even after further adjustment for left atrial dimensions. Both reduced PALS and PACS were associated with the incidence of AF in patients with nondilated left atria (P value for the interaction of PALS with left atrial dimensions=.013). CONCLUSIONS: In severe aortic stenosis, left atrial dysfunction predicted the incidence of postoperative AF independently of left atrial dilation, suggesting that speckle-tracking echocardiography before surgery may help in risk stratification, particularly in patients with nondilated left atria.

Original publication

DOI

10.1016/j.rec.2017.10.005

Type

Journal article

Journal

Rev Esp Cardiol (Engl Ed)

Publication Date

06/2018

Volume

71

Pages

466 - 476

Keywords

Aortic stenosis, Aortic valve replacement, Atrial fibrillation, EPICHEART study, Estenosis aórtica, Estenosis aórtica grave, Estudio EPICHEART, Fibrilación auricular, Left atrial strain, Recambio de válvula aórtica, Severe aortic stenosis, Strain de la aurícula izquierda, Aged, Aortic Valve, Aortic Valve Stenosis, Atrial Fibrillation, Atrial Function, Left, Echocardiography, Female, Heart Valve Prosthesis Implantation, Humans, Male, Postoperative Complications, Risk Assessment, Stress, Physiological