摘要
目的：应用三维斑点追踪技术（3DT）探讨正常儿童左心室心肌纵向应变特征及其与年龄的关系。方法：将126例3天～15岁健康受试者按年龄分为5组：A婴幼儿组（3天～3岁），B学龄前期组（3～5岁），C学龄期组（6～9岁），D青春前期组（10～12岁），E青春期组（13～15岁）。经胸超声同时采集左心室心尖四腔和两腔切面图像后，获取左心室三维全容积动态图像，存储图像后运用3DT分析软件进行在线分析。分析获取的左心室心肌整体及16节段收缩期纵向峰值应变（LS）测值。结果：①各组内比较：心尖段LS测值大于基底段及中间段，基底段至心尖段应变值递增，但差异无统计学意义（P>0.05）。②各组间比较：5组左室壁心肌整体及16节段LS测值随年龄增长大致呈递减趋势。5组各节段LS测值：除前间隔基底段及中间段、侧壁心尖段外，余节段差异均有统计学意义（P<0.05）。5组整体LS测值差异有统计学意义，其中A组、B组及C组整体LS测值大于D组及E组，差异有统计学意义（P<0.05）。结论：在出生后至青春期随着心脏的发育，左心室整体及16节段室壁心肌纵向应变值随年龄增加有一定的规律。
Abstract
Objective: This study was performed to evaluate the characteristics of left ventricular systolic longitudinal strain(LS) in healthy children and its relationship with age using three-dimensional speckle tracking(3DT). Methods: One hundred and twenty-six healthy subjects aged from 3 days to 15 years were divided into 5 groups: group A infants(3 days～3 years old), group B pre school age children(3～5 years old), group C school age children(6～9 years old), group D preadolescent(10～12 years old) and group E adolescent age(13～15 years old). The dynamic images of apical two and four-chamber views were displayed and apical full-volume acquisition was obtained in 126 subjects to visualize the entire left ventricular in a volumetric image. The full-volume images were recorded and then were analyzed by on-line 3DT analysis software. The longitudinal peak systolic strains of left ventricular by using 3DT were compared. Results: ①The LS of apical segment was larger than that of the basal segment and the middle segment, and it had a decreasing trend from the apical segment to the basal segment. But the difference was not statistically significant.②The LS value of the five groups showed a decreasing trend with age, and significant difference was found except for the two segments of anterior septum and apical segment of lateral wall. The global LS value of group A, B and C was larger than that in group D and E. And this difference was statistically significant. Conclusion: The global and 16 segments LS of left ventricular wall has a certain pattern in increasing with age after birth to adolescence with the development of the heart.
关键词
心室功能 /
左 /
儿童 /
超声心动描记术 /
三维
Key words
Ventricular function /
left /
Child /
Echocardiography /
three-dimensional
王 帅;秦石成;张瑞芳.
三维斑点追踪技术评价正常儿童左心室心肌纵向应变的研究[J]. 中国临床医学影像杂志. 2012, 23(3): 165-167
WANG Shuai;QIN Shi-cheng;ZHANG Rui-fang.
Evaluation of left ventricular systolic longitudinal strain in healthy children with three-dimensional speckle tracking[J]. Journal of China Clinic Medical Imaging. 2012, 23(3): 165-167
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