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A system for analyzing left ventricular(LV) electromechanical asynchrony based on transesophageal 3-dimensi-onal echocardiography(3-DE) and semi-automatic endocardial contour detection is described. Eighteen consecutive patients under went 3-DE. Using TomTec 4DLV software, a 3-di-mensional endocardial surface w as reconstructed throughout the cardiac cycle. Matlab software generated color- coded polar maps, displaying regional LV displacement and its timing. At the seg mental level, Bland-Altmann assessment showed intraobserver variability of LV d isplacement of 0.1±.3.0 mm and timing of -5.6±.160 ms(bias±.2 SD) for all se gments and -1.6±.94 ms for the nonapical segments. The combination of 3-DE an d semi-automatic contour detection is feasible and provides unique information for assessing regional LV endocardial displacement and electromechanical asynchr ony.
A system for analyzing left ventricular (LV) electromechanical asynchrony based on transesophageal 3-dimensi-onal echocardiography (3-DE) and semi-automatic endocardial contour detection described. Eighteen consecutive patients under went 3-DE. Using TomTec 4DLV software, a 3-di-mensional endocardial surface w as reconstructed throughout the cardiac cycle. Matlab software generated color-coded polar maps, displaying regional LV displacement and its timing. At the seg mental level, Bland-Altmann assessment showed intraobserver variability of LV d isplacement of 0.1 ± .3.0 mm and timing of -5.6 ± .160 ms (bias ± .2 SD) for all sements and -1.6 ± .94 ms for the nonapical segments. The combination of 3-DE an d semi-automatic contour detection is feasible and provides unique information for assessing regional LV endocardial displacement and electromechanical asynchr ony.