van der Heide Johannes A, Mannaerts Herman F, Spruijt Hugo J, van Campen Linda M, de Cock Carel, Visser Cees A, Kamp Otto
Department of Cardiology, VU University Medical Center, Amsterdam, The Netherlands.
Am J Cardiol. 2004 Dec 1;94(11):1449-53. doi: 10.1016/j.amjcard.2004.07.152.
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.
描述了一种基于经食管三维超声心动图（3-DE）和半自动心内膜轮廓检测来分析左心室（LV）机电失同步的系统。连续18例患者接受了3-DE检查。使用TomTec 4DLV软件，在整个心动周期中重建三维心内膜表面。Matlab软件生成彩色编码极坐标图，显示左心室局部位移及其时间。在节段水平，Bland-Altmann评估显示，所有节段的左心室位移观察者内变异性为0.1±3.0 mm，时间为-5.6±160 ms（偏差±2 SD），非心尖节段为-1.6±94 ms。3-DE和半自动轮廓检测相结合是可行的，并为评估左心室局部心内膜位移和机电失同步提供了独特的信息。
