Reproducibility of regional and global longitudinal strains derived from two-dimensional speckle-tracking and Doppler tissue imaging between expert and novice readers during quantitative dobutamine stress echocardiography

Yamada, Akira, Luis, Sushil A., Sathianathan, Daniel, Khandheria, Bijoy K., Cafaro, James, Hamilton-Craig, Christian R., Platts, David G., Haseler, Luke, Burstow, Darryl and Chan, Jonathan (2014) Reproducibility of regional and global longitudinal strains derived from two-dimensional speckle-tracking and Doppler tissue imaging between expert and novice readers during quantitative dobutamine stress echocardiography. Journal of the American Society of Echocardiography, 27 8: 880-887. doi:10.1016/j.echo.2014.04.016

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Author Yamada, Akira
Luis, Sushil A.
Sathianathan, Daniel
Khandheria, Bijoy K.
Cafaro, James
Hamilton-Craig, Christian R.
Platts, David G.
Haseler, Luke
Burstow, Darryl
Chan, Jonathan
Title Reproducibility of regional and global longitudinal strains derived from two-dimensional speckle-tracking and Doppler tissue imaging between expert and novice readers during quantitative dobutamine stress echocardiography
Journal name Journal of the American Society of Echocardiography   Check publisher's open access policy
ISSN 1097-6795
0894-7317
Publication date 2014-08-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.echo.2014.04.016
Volume 27
Issue 8
Start page 880
End page 887
Total pages 8
Place of publication Philadelphia United States
Publisher Mosby
Collection year 2015
Language eng
Formatted abstract
Background
Longitudinal strain (LS) is a quantitative parameter that adds incremental value to wall motion analysis. The aim of this study was to compare the reproducibility of LS derived from Doppler tissue imaging and speckle-tracking between an expert and a novice strain reader during dobutamine stress echocardiography (DSE).

Methods
Forty-one patients (mean age, 65 ± 15 years; mean ejection fraction, 58 ± 11%) underwent DSE per clinical protocol. Global LS derived from speckle-tracking and regional LS derived from both speckle-tracking and Doppler tissue imaging were measured twice by an expert strain reader and also measured twice by a novice strain reader. Intraobserver and interobserver analyses were performed using intraclass correlation coefficients (ICC), Bland-Altman analysis, and absolute difference values (mean ± SD).

Results
Global LS measured by the expert strain reader demonstrated high intraobserver measurement reproducibility (rest: ICC = 0.95, absolute difference = 5.5 ± 4.9%; low dose: ICC = 0.96, absolute difference = 5.7 ± 3.7%; peak dose: ICC = 0.87, absolute difference = 11.4 ± 8.4%). Global LS measured by the novice strain reader also demonstrated high intraobserver reproducibility (rest: ICC = 0.97, absolute difference = 4.1 ± 3.4%; low dose: ICC = 0.94, absolute difference = 5.4 ± 5.9%; peak dose: ICC = 0.94, absolute difference = 6.1 ± 4.8%). Global LS also showed high interobserver agreement between the expert and novice readers at all stages of DSE (rest: ICC = 0.90, absolute difference = 8.5 ± 7.5%; low dose: ICC = 0.90, absolute difference = 8.9 ± 7.1%; peak dose: ICC = 0.87, absolute difference = 10.8 ± 8.4%). Of all parameters studied, LS derived from Doppler tissue imaging had relatively low interobserver and intraobserver agreement.

Conclusions
Global LS is highly reproducible during all stages of DSE. This variable is a potentially reliable and reproducible measure of myocardial deformation.
Keyword Dobutamine stress echocardiography
Doppler tissue imaging
Global longitudinal strain
Regional longitudinal strain
Speckle-tracking
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Medicine Publications
 
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