Wang Xiaoyan, Lian Yajun, Wang Xiaofang, Tian Min
Department of Ultrasound, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.
Internal Medicine-Cardiovascular Department, Heping Hospital Affiliated to Changzhi Medical College, Changzhi, Shanxi, China.
Echocardiography. 2016 Aug;33(8):1228-33. doi: 10.1111/echo.13238. Epub 2016 Jul 26.
The purpose of this study was to investigate the clinical value of velocity vector imaging in the assessment of regional left ventricular longitudinal function in fetuses with gestational diabetes mellitus.
Digital dynamic four-chamber views of 98 fetuses with gestational diabetes mellitus and 135 normal fetuses were collected and analyzed using velocity vector imaging. The regional tissue velocity, strain, and strain rate of the interventricular septum and left lateral wall were separately measured in systole and diastole.
A total of 207 of 233 cases were analyzed successfully. Vs (systolic velocity) and Vd (diastolic velocity) were age-dependent and gradually decreased from the basal segment to the apical segment in the left ventricle (P < 0.05). The Vs after 32(+0) weeks, Vd after 28(+0) weeks, and S (strain), SRs (systolic strain rate), and SRd (diastolic strain rate) after 24(+0) weeks in the left ventricle of fetuses with GDM were obviously lower than the corresponding parameters of normal fetuses (P < 0.05).
VVI can evaluate the fetal regional left ventricular longitudinal function.
本研究旨在探讨速度向量成像在评估妊娠期糖尿病胎儿左心室局部纵向功能中的临床价值。
收集98例妊娠期糖尿病胎儿和135例正常胎儿的数字动态四腔心视图，采用速度向量成像进行分析。分别测量收缩期和舒张期室间隔及左外侧壁的局部组织速度、应变和应变率。
233例中共有207例成功分析。Vs（收缩期速度）和Vd（舒张期速度）与年龄有关，在左心室内从基底段到心尖段逐渐降低（P<0.05）。妊娠期糖尿病胎儿左心室32（+0）周后的Vs、28（+0）周后的Vd以及24（+0）周后的S（应变）、SRs（收缩期应变率）和SRd（舒张期应变率）明显低于正常胎儿的相应参数（P<0.05）。
速度向量成像可评估胎儿左心室局部纵向功能。
