Author/Authors :
van der Heide، نويسنده , , Johannes A. and Mannaerts، نويسنده , , Herman F. and Spruijt، نويسنده , , Hugo J. and van Campen، نويسنده , , Linda M. and de Cock، نويسنده , , Carel and Visser، نويسنده , , Cees A. and Kamp، نويسنده , , Otto، نويسنده ,
Abstract :
A system for analyzing left ventricular (LV) electromechanical asynchrony based on transesophageal 3-dimensional echocardiography (3-DE) and semi-automatic endocardial contour detection is described. Eighteen consecutive patients underwent 3-DE. Using TomTec 4DLV software, a 3-dimensional endocardial surface was reconstructed throughout the cardiac cycle. Matlab software generated color-coded polar maps, displaying regional LV displacement and its timing. At the segmental level, Bland-Altmann assessment showed intraobserver variability of LV displacement of 0.1 ± 3.0 mm and timing of −5.6 ± 160 ms (bias ± 2 SD) for all segments and −1.6 ± 94 ms for the nonapical segments. The combination of 3-DE and semi-automatic contour detection is feasible and provides unique information for assessing regional LV endocardial displacement and electromechanical asynchrony.
