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1.400014 重庆, 重庆医科大学附属儿童医院超声科
2.400014 重庆, 重庆医科大学附属儿童医院流行病学与生物信息学研究室
3.400014 重庆, 重庆医科大学附属儿童医院儿科研究所
4.400014 重庆, 重庆医科大学附属儿童医院儿童发育疾病研究教育部重点实验室, 儿童发育重大疾病国家国际科技合作基地, 儿科学重庆市重点实验室
[汪朝霞, E-mail:zhaoxia_wang103@163.com WANG Zhaoxia, E-mail: zhaoxia_wang103@163.com
收稿:2016-12-26,
修回:2017-03-14,
纸质出版:2017-09-15
移动端阅览
钟英, 王冬, 高惠, 等. 不同年龄段健康儿童左心室收缩期心肌纵向应变及应变率正常参考值的初步分析[J]. 第三军医大学学报, 2017,39(17):1750-1755.
Ying ZHONG, Dong WANG, Hui GAO, et al. Normal reference values for left ventricular peak systolic longitudinal strain and strain rate in healthy children at different ages: a preliminary analysis[J]. Journal of Third Military Medical University, 2017, 39(17): 1750-1755.
钟英, 王冬, 高惠, 等. 不同年龄段健康儿童左心室收缩期心肌纵向应变及应变率正常参考值的初步分析[J]. 第三军医大学学报, 2017,39(17):1750-1755. DOI: 10.16016/j.1000-5404.201612177.
Ying ZHONG, Dong WANG, Hui GAO, et al. Normal reference values for left ventricular peak systolic longitudinal strain and strain rate in healthy children at different ages: a preliminary analysis[J]. Journal of Third Military Medical University, 2017, 39(17): 1750-1755. DOI: 10.16016/j.1000-5404.201612177.
目的
2
应用二维斑点追踪成像技术定量分析健康儿童左心室收缩期心肌纵向应变及应变率,并进行其不同年龄段正常参考值的初步分析。
方法
2
回顾性分析2015年9月至2016年11月来本院超声科体检的330例健康儿童的超声临床资料。按年龄分成7组,分为新生儿组(0~28 d)、婴儿组(>28 d至<1岁)、幼儿组(1~<3岁)、学龄前期组(3~<6岁)、学龄期组(6~<9岁)、青春前期组(9~<13岁)、青春期组(13~<18岁)。采用斑点追踪软件分析左心室心尖3个长轴切面的动态图像,获取左心室收缩期心肌纵向应变及应变率值。
结果
2
① 6室壁节段间收缩期纵向应变及应变率的差异均有统计学意义(
P
<
0.05),且纵向应变及应变率绝对值自基底段向心尖段呈逐渐增加趋势;② 18节段应变及应变率及整体应变在不同性别间差异均无统计学意义(
P
>
0.05);③ 除后壁、下壁、后间隔基底段外,余各室壁节段纵向应变(longitudinal strain
LS)情况为|LS
新生儿组
|<|LS
婴儿组
|<|LS
幼儿、学龄前期、学龄期组
|<|LS
青春前期、青春期组
|
且整体心肌纵向应变在年龄组间的趋势与其一致;④ 18节段应变与年龄呈正相关,以侧壁心尖段相关性最强(
r
=0.551,
P
<
0.01);与心率均呈负相关,以侧壁中间段相关性最强(
r
=-0.517,
P
<
0.01);整体心肌纵向应变与年龄呈正相关(
r
=0.665,
P
<
0.01),与心率呈负相关(
r
=-0.625,
P
<
0.01)。⑤ 18节段应变率与年龄、心率的相关性,以及在各年龄
组间的差异存在不均一性。
结论
2
建立了不同年龄段健康儿童左心室收缩期心肌纵向应变及应变率的正常参考值,并发现其具有自身特征。
Objective
2
To analyze the normal reference values of left ventricular longitudinal peak systolic strain (LS) and strain rate (LSr) by two-dimensional speckle tracking imaging (2D-STI) in healthy children at different ages.
Methods
2
Clinical ultrasound data of 330 healthy children who taking physical examination in our hospital from September 2015 to November 2016 were collected and retrospectively. They were divided into 7 groups according to their ages
that is
neonate group (0 to 28 days old)
infant group (28 days to 1 year old)
toddle group (1 to 3 years old)
pre-school group (3 to 6 years old)
school age group (6 to 9 years old)
pre-adolescence group (9 to 13 years old) and adolescence group (13 to 18 years old). 2D-STI was performed in the 3 apical projections of left ventricle (LV). The regional peak systolic longitudinal strain and strain rate of LV were measured.
Results
2
① Significant differences were found in the LS and LSr values from 6 segments of the same wall (
P
<
0.05)
and the LS and LSr values were gradually increased from basal segment to apical segment. ② There were no significant differences in the LS
LSr and global LS (GLS) values of 18 segments between sexes (
P
>
0.05). ③ Except the basal segments of posterior wall
inferior wall and posterior septum
LS value was gradually elevated with the increase of age (LS
neonate
<
LS
infant
<
LS
toddler
pre-school and school age
<
LS
pre-adolescence and adolescence
)
so was GLS value. ④ LS in 18 segments had a positive correlation with age
and the value of apical segment in lateral wall was most remarkably correlated (
r
=0.551
P
<
0.01); Regional LS had a negati
ve correlation with heart rate
and that of middle segment in lateral wall was the most apparent (
r
=-0.625
P
<
0.01); GLS was positively influenced by age (
r
=0.665
P
<
0.01) and negatively affected by heart rate (
r
=-0.625
P
<
0.01). ⑤ The heterogeneities were found in the correlations of regional LSr with age and heart rate in segments and in the LSr among different age groups.
Conclusion
2
Normal reference values of LV peak LS and LSr are established for healthy children at different ages
and they possess their own characteristics.
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