Motoki, H and Dahiya, A and Bhargava, M and Wazni, OM and Saliba, WI and Marwick, TH and Klein, AL, Assessment of left atrial mechanics in patients with atrial fibrillation: comparison between two-dimensional speckle-based strain and velocity vector imaging, American Society of Echocardiography. Journal, 25, (4) pp. 428-435. ISSN 0894-7317 (2012) [Refereed Article]
Copyright 2012 by the American Society of Echocardiography
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.
|Item Type:||Refereed Article|
|Keywords:||atrial function, left atrial strain, speckle-tracking imaging, atrial fibrillation|
|Research Division:||Biomedical and Clinical Sciences|
|Research Group:||Cardiovascular medicine and haematology|
|Research Field:||Cardiology (incl. cardiovascular diseases)|
|Objective Group:||Clinical health|
|Objective Field:||Clinical health not elsewhere classified|
|UTAS Author:||Marwick, TH (Professor Tom Marwick)|
|Web of Science® Times Cited:||42|
|Deposited By:||Menzies Institute for Medical Research|
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