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Functional and anatomic responses of the left atrium to change in estimated left ventricular filling pressure

Citation

Huynh, QL and Kalam, K and Iannaccone, A and Negishi, K and Thomas, L and Marwick, TH, Functional and anatomic responses of the left atrium to change in estimated left ventricular filling pressure, Journal of the American Society of Echocardiography, 28, (12) pp. 1428-1433. ISSN 0894-7317 (2015) [Refereed Article]


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Copyright Statement

Copyright 2015 The American Society of Echocardiography

DOI: doi:10.1016/j.echo.2015.07.028

Abstract

Background: Left atrial (LA) remodeling and dysfunction reflect chronic exposure to elevated left ventricular (LV) filling pressures. The aim of this longitudinal cohort study was to define the effect of reducing LV filling pressures on reverse remodeling of LA volume (LAV) and function.

Methods: This retrospective cohort included 195 patients (52% men; mean age, 6414 years) in sinus rhythm with LA dilatation and sequential echocardiograms (median interval, 1 year; interquartile range, 0.5-2.0 years). One hundred seventy-four patients underwent medical therapy (82 with reduced E/e' ratios), and 21 underwent surgery for valvular heart disease. Biplane LAV (normal value, ≤68 mL for men, ≤62 mL for women), LA strain (ε) (normal value, >32%) and LV filling pressures (assessed as E/e' ratio; normal value, <13) were measured.

Results: Although LAV at baseline and follow-up were 8827 and 8124 mL, LA ε and E/e' ratio remained stable at 26 11% and 147, respectively. Changes in E/e' ratio were associated with changes in LAV (r=0.37, P<.001) and LA ε (r=-0.51 P<.001). Although reduced E/e' ratio or improved LA ε at follow-up occurred in about 50% of the patients, only 26% (51 of 195) had normalized LAV. Compared with surgery, successful reduction of E/e' with medical therapy was less effective in reducing LAV (P<.001) but produced similar improvement in LA ε. Having normal or improved E/e' ratio at follow-up was not associated with normalization of LAV (relative risk, 1.29 [P=.326] and 1.22 [P=.421], respectively) but was associated with normalized LA ε (relative risk, 2.04 [P=.011] and 1.86 [P=.017], respectively) independently of LAV.

Conclusions: Reduction in LV filling pressures reduces but rarely normalizes LAV. The strong association of reduced LV filling pressure with improved LA function indicated by LA longitudinal ε supports the increasing interest of LA ε measurement.

Item Details

Item Type:Refereed Article
Keywords:echocardiography, Doppler, volume, filling pressure, left atrium, structure, strain
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
UTAS Author:Huynh, QL (Dr Quan Huynh)
UTAS Author:Kalam, K (Dr Kashif Kalam)
UTAS Author:Iannaccone, A (Dr Andrea Iannaccone)
UTAS Author:Negishi, K (Dr Kazuaki Negishi)
UTAS Author:Marwick, TH (Professor Tom Marwick)
ID Code:103277
Year Published:2015
Web of Science® Times Cited:13
Deposited By:Menzies Institute for Medical Research
Deposited On:2015-10-01
Last Modified:2017-11-02
Downloads:0

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