Quantitative analysis of strain and strain rate of right ventricular in normal subjects by velocity vector imaging
- VernacularTitle:速度向量成像评价正常成人右心室应变和应变率
- Author:
Haijun HOU
;
Guang ZHI
;
Xiaojuan ZHANG
;
Xiao ZHOU
;
Yong XU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,right;
Adult;
Velocity vector imaging
- From:
Chinese Journal of Ultrasonography
2008;17(4):281-283
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate strain and strain rate of right ventricular(RV)based on twodimensional image by velocity vector imaging in normal subjects.Methods Thirty-two healthy adults were rolled in this study.Echocardiographic images in 4 chamber view were analyzed by conventional manual tracing for volumes and ejection fractions,which were also measured by velocity vector imaging.Myocardial velocity,strain rate,and strain were determined at the basal,mid,and apical segments of the RV free wall and ventricular septum by velocity vector imaging.Results RV ejection fractions obtained with manual tracing correlated strongly with the same indexes obtained by velocity vector imaging method in all subjects(r=0.91,P＜0.01).The strain and strain rate value of middle segment and basal segment in RV free wall were higher than those of apical segment.There were same trend in ventricular septal.The strain and strain rate of middle segment and basal segment in RV free wall were higher than those of homologous segments in ventricular septal,but the indexes of apical segment in free wail and septal had no difference.The strain and strain rate in RV were not correlated with age.Conclusions Velocity vector imaging could accurately and quantitatively assess the strain and strain rate of RV.
