Two-dimensional speckle tracking echocardiography provided similar left ventricular twist values to tagged cMR when matched for acquisition levels (e.g., endocardial twist 12.5 vs 12.6 degrees; P=ns).
Cross-Sectional (n=53)
Does two-dimensional speckle tracking echocardiography accurately estimate left ventricular twist compared to tagged cardiac magnetic resonance?
2D-STE provides similar LV twist values to tagged cMR when compared at similar acquisition levels, though it generally underestimates apical rotation due to inability to image the true LV apex.
valor p: p=ns
AIMS: The aim of this article is to evaluate the accuracy and reproducibility of two-dimensional speckle tracking echocardiography (2D-STE) for the estimation of left ventricular (LV) twist, using tagged cardiac magnetic resonance (cMR) as the reference standard, and to assess how much 2D-STE rotational parameters are affected by the level at which measurements are made within the LV. METHODS AND RESULTS: Forty-three patients with various heart diseases and 10 healthy volunteers underwent cMR and 2D-STE on the same day. With both methods, basal and apical time-rotation curves were generated at endocardial, midwall, and epicardial levels. By using the most apical cMR short-axis cross-section as a comparator, apical rotation was significantly underestimated by 2D-STE. When 2D-STE and cMR short-axis cross-sections were matched for their internal dimensions, measurements of endocardial, midwall, and epicardial twists no longer differ between cMR and 2D-STE (12.6 +/- 5.9 vs. 12.5 +/- 5.7 degrees , 10.5 +/- 4.6 vs. 9.7 +/- 4.1 degrees , and 8.9 +/- 4.0 vs. 8.4 +/- 3.7 degrees , respectively, all P = ns). CONCLUSION: Compared with tagged cMR, 2D-STE underestimates apical rotation and LV twist. This is related to the inability of 2D-STE to image the real LV apex in most of the patients. However, when 2D-STE and cMR data are compared at similar acquisition levels, both techniques provide similar values.
Goffinet et al. (Thu,) conducted a cross-sectional in Various heart diseases and healthy volunteers (n=53). Two-dimensional speckle tracking echocardiography (2D-STE) vs. Tagged cardiac magnetic resonance (cMR) was evaluated on Left ventricular twist at endocardial, midwall, and epicardial levels (p=ns). Two-dimensional speckle tracking echocardiography provided similar left ventricular twist values to tagged cMR when matched for acquisition levels (e.g., endocardial twist 12.5 vs 12.6 degrees; P=ns).