Assessment of regional right ventricular longitudinal function in fetus using velocity vector imaging
10.3760/cma.j.issn.1004-4477.2009.11.015
- VernacularTitle:速度向量成像技术检测胎儿右心室长轴节段功能的临床研究
- Author:
Darong PU
;
Qichang ZHOU
;
Qinghai PENG
;
Shi ZENG
;
Ganqiong XU
- Publication Type:Journal Article
- Keywords:
Ultrasonography;
prenatal;
Fetus;
Ventricular function;
right;
Velocity vector imaging
- From:
Chinese Journal of Ultrasonography
2009;18(11):956-959
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate regional right ventricular longitudinal function in fetus using velocity vector imaging(VVI),and establish nomogram of right ventricle,Methods One hundreed and seventy healthy fetuses were divided into 5 groups according to the gestational age.Dynamic digital views of four chamber view were collected and analyzed offline.Velocity,strain and strain rate were calculated in systolic and diastolic period,respectively.Results Normal systolic and diastolic values for velocity,strain and strain rate were established.Tissue velocity gradually decreased from the base segment to the apical segment(P＜0.05),whereas strain and strain rate were stable(P＞0.05).Tissue velocity was gestationalage dependent(P＜0.05),whereas strain and strain rate were stable throughout gestation (P＞0.05).Conclusions Fetal myocardial velocity,strain and strain rate measurements are easy to obtain and reproducible.Increase in tissue velocity throughout gestation probably reflects the growth of the fetal heart,whereas intrinsic myocardial properties as measured by strain and strain rate do not change.
