Assessment of left atrial mechanics in patients with atrial fibrillation: Comparison between two-dimensional speckle-based strain and velocity vector imaging

Motoki, Hirohiko, Dahiya, Arun, Bhargava, Mandeep, Wazni, Oussama M., Saliba, Walid I., Marwick, Thomas H. and Klein, Allan L. (2012) Assessment of left atrial mechanics in patients with atrial fibrillation: Comparison between two-dimensional speckle-based strain and velocity vector imaging. Journal of The American Society of Echocardiography, 25 4: 428-435.


Author Motoki, Hirohiko
Dahiya, Arun
Bhargava, Mandeep
Wazni, Oussama M.
Saliba, Walid I.
Marwick, Thomas H.
Klein, Allan L.
Title Assessment of left atrial mechanics in patients with atrial fibrillation: Comparison between two-dimensional speckle-based strain and velocity vector imaging
Journal name Journal of The American Society of Echocardiography  (ERA 2012 Listed)    (ERA 2010 Rank B)   Check publisher's open access policy
Publication date 2012-04
Sub-type Article
DOI 10.1016/j.echo.2011.12.020
Volume number 25
Issue number 4
ISSN 0894-7317;1097-6795
Start page 428
End page 435
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Mosby, Inc.
Collection year 2013
Language eng
Formatted abstract Background
Two-dimensional (2D) speckle tracking–derived left atrial (LA) strain (ε) facilitates comprehensive evaluation of LA contractile, reservoir, and conduit function; however, its dependence on the individual software used for assessment has not been evaluated. The aim of this study was to compare LA ε derived from two different speckle-tracking software technologies, Velocity Vector Imaging (VVI) and 2D speckle-tracking echocardiography (STE).

Methods
VVI-derived and 2D STE–derived global longitudinal LA ε and ε rate (SR) were directly compared in 127 patients (mean age, 62 ± 10 years) with atrial fibrillation. Peak negative, peak positive, and total ε (corresponding to LA contractile, conduit, and reservoir function) were measured during sinus rhythm. Late negative (LA contraction), peak positive (left ventricular systole), and early negative (left ventricular early diastole) SR were also measured.

Results
The measurement of LA ε and SR by both software was feasible in high proportions of patients (93% with VVI and 93% with 2D STE). The average analysis of εnegative was −7.24 ± 3.87% by VVI and −7.30 ± 3.37% by 2D STE (P = .84). The average analysis of εpositive was 14.52 ± 5.82% by VVI and 10.74 ± 4.51% by 2D STE (P < .01). The average analysis of εtotal was 21.76 ± 7.39% by VVI and 18.04 ± 5.98% by 2D STE (P < .01). VVI-derived and 2D STE–derived εpositive, εnegative, and εtotal had good correlations with one another (R = 0.79, R = 0.75, and R = 0.80), with low mean differences. Late negative, peak positive, and early negative SR were correlated less well (R = 0.78, R = 0.71, and R = 0.67).

Conclusions
LA ε measurement using both VVI and 2D STE is feasible in a large proportion of patients in clinical practice. VVI and 2D STE provide comparable LA ε and SR measurements for LA contractile function.
Keyword Atrial function
Left atrial strain
Speckle-tracking imaging
Atrial fibrillation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article
Collections: Non HERDC
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Created: Fri, 06 Jul 2012, 11:27:55 EST by Matthew Lamb on behalf of School of Medicine