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- Title
Impact of acoustic window on accuracy of longitudinal global strain: a comparison study to cardiac magnetic resonance.
- Authors
Macron, Laurent; Lairez, Olivier; Nahum, Julien; Berry, Mathieu; Deal, Leslie; Deux, Jean-François; Bensaid, Alexandre; Dubois Randé, Jean-Luc; Gueret, Pascal; Lim, Pascal
- Abstract
Aims To evaluate the impact of acoustic window on the feasibility and accuracy of longitudinal global strain (global-ɛ) by speckle tracking for assessing left ventricular (LV) systolic function. Methods and results The study included 70 patients (57 ± 17 years, 64% men), 28 selected patients with a suboptimal image quality (IQ) defined by three or more segments (4 ± 3 segments/patient) with wall motion score not analysable visually and 42 patients with an optimal two-dimensional (2D) echocardiography IQ. Left ventricular ejection fraction (LVEF) by Simpson's biplane method (2D-EF), global-ɛ by speckle tracking, and peak systolic mitral annulus velocity [systolic tissue Doppler imaging (S-TDI)] were compared with LVEF by cardiac magnetic resonance (EF-CMR; 45 ± 18%, range 9–76%). Speckle-tracking analysis was feasible in all segments with an optimal acoustic window and in 85% (103/121) of segments poorly visualized. Global-ɛ similarly correlated with LVEF by CMR in patients with and without optimal IQ (r = 0.81 vs. 0.82 for good vs. poor IQ). In contrast, 2D-EF (r = 0.76) and S-TDI (r = 0.64) less correlated with LVEF by CMR in patients with a suboptimal IQ. Importantly, IQ only impacted on 2D-EF inter-observer reproducibility (9 ± 5 vs. 24 ± 22% for good vs. poor IQ) but not on global-ɛ reproducibility (9 ± 1 vs. 8 ± 7% for good vs. poor IQ). Conclusion In patients with a limited acoustic window, longitudinal strain by speckle tracking remains accurate and reproducible for assessing global and regional LV systolic function.
- Subjects
ANALYSIS of variance; CARDIAC output; COMPARATIVE studies; COMPUTER software; DOPPLER echocardiography; LEFT heart ventricle; HEART beat; MAGNETIC resonance imaging; RESEARCH evaluation; T-test (Statistics); DATA analysis
- Publication
European Journal of Echocardiography, 2011, Vol 12, Issue 5, p394
- ISSN
1525-2167
- Publication type
Article
- DOI
10.1093/ejechocard/jer029