Quantitative assessment of left ventricular torsion in normal subjects using vector velocity imaging
- VernacularTitle:速度向量成像技术定量评价正常人左心室扭转运动
- Author:
Min CAO
;
Yinguang SUN
;
Wen RUAN
;
Qinhua ZHAO
;
Zhongwei SHI
;
Weifeng SHEN
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Torsion;
Vector velocity imaging
- From:
Chinese Journal of Ultrasonography
2008;17(3):197-199
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the left ventricular(LV) torsion and rotation in normal subjects using vector velocity imaging.Methods LV basal and apical short-axis images were captured in 10 healthy individuals to estimate LV torsion and rotation using routine 2-dimensional echocardiography and vector velocity imaging. Results As viewed from LV apex,the systolic basal rotation was clockwise (negative value),and apical rotation was counterclockwise (positive Value). The apical peak systolic rotational velocity was significantly higher than the basal [endo:(150±62)°/s vs (114±65)°/s;epi:(81±40)°/s vs (55±28)°s,respectively,P＜0.01]. The peak systolic endocardial rotational velocity and rotation was significantly higher than epicardial rotational velocity and rotation[basal:(-114±65)°/s vs (-55±28)°/s,(-12±6)°vs (-4±1)°;apical:(150±62)°s vs (81±40)°s,(10±4)°vs(6±2)°,respectivelv,P＜0.05]. There were no significant differences in the time to peak systolic rotational velocity/rotation between basal endocardium/epicardium and apical endocardium/epicardium. Conclusions Vector velocity imaging can assess LV torsion and rotation non-invasively,and normal LV has a kind of characteristic motion of torsion.
