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, A.; Luis, S.; Sathianathan, D.; Khandheria, B.; Cafaro, J.; Hamilton-Craig, C.; Platts, D.; Haseler, Luke; Burstow, D.; Chan, J.

doi:10.1016/j.echo.2014.04.016

Access Status

Fulltext not available

Authors

Yamada, A.

Luis, S.

Sathianathan, D.

Khandheria, B.

Cafaro, J.

Hamilton-Craig, C.

Platts, D.

Haseler, Luke

Burstow, D.

Chan, J.

Date

2014

Type

Journal Article

Metadata

Show full item record

Citation

Yamada, A. and Luis, S. and Sathianathan, D. and Khandheria, B. and Cafaro, J. and Hamilton-Craig, C. and Platts, D. et al. 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): pp. 880-887.

Source Title

Journal of the American Society of Echocardiography

DOI

10.1016/j.echo.2014.04.016

ISSN

0894-7317

School

School of Physiotherapy and Exercise Science

URI

http://hdl.handle.net/20.500.11937/60772

Collection

Curtin Research Publications

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.