Assessment of ventricular function in children with single ventricle after cavopuimonary connection using velocity vector imaging

VernacularTitle:速度向量成像评估单心室腔肺分流术后节段心功能的研究
Author: Lijun WU ; Yuqi ZHANG ; Kun SUN ; Lijun CHEN ; Yanjun ZHAO ; Liping YAO
Publication Type:Journal Article
Keywords: Echocardiography; Single ventricle; Ventricular function; Heart bypass,right; Velocity vector imaging
From: Chinese Journal of Ultrasonography 2012;21(1):6-9
CountryChina
Language:Chinese
Abstract: ObjectiveTo evaluate the feasibility and accuracy of velocity vector imaging (VVI) in assessing ventricular function in children with single ventricle after cavopulmonary connection.Methods Thirty children with single ventricle after cavopulmonary connection were enrolled in this study,30 agematched normal children were served as control group.The systolic peak velocity,displacement,strain and strain rate in this two groups measured in 6 segments by VVI were compared.dp/dt of single ventricle was estimated by atrioventricular regurgitation using simplified Bernoulli equation.Results Strain and strain rate were significantly lower in all 6 segments in children with single ventricle after cavopulmonary connection compared with values in normal children( P ＜0.05,respectively),strain rate of the basal segment at the rudimentary chamber correlated best with dp/dt (r =0.72,P ＜0.01).Conclusions Segmental ventricular dysfunction was observed in children with single ventricle after cavopulmonary connection,and could be assessed accurately using velocity vector imaging.