Evaluation of right ventricular function in children with pulmonary stenosis by two-dimensional and three-dimensional speckle tracking imaging

CHEN Lijun; ZHUANG Xiaoyun; KONG Linghui

Abstract：Objective To investigate the ventricular function right in children with pulmonary stenosis(PS)by two-dimensional speckle tracking imaging(2D-STI)and three-dimensional speckle tracking imaging(3D-STI).Methods A total of 22 children with PS were enrolled as PS group in this study and 48gender-and age-matched healthy childrenwere selected as con-trol group.The right ventricular end diastolic diameter,right ventricular fractional area change(FAC),tricuspid annular peak systolic excursion(TAPSE),and tricuspid annular systolic peak velocity(S')were obtained by two-dimensional echocardiogra-phy.The global longitudinal strain of right ventricle(RVGLS),free-wall longitudinal strain(RVFWLS)and interventricular sep-tum longitudinal strain(IVSGLS)were obtained by 2D-STI.Theend-diastolic volume(EDV),end-systolic volume(ESV),stroke volume(SV)and ejection fraction(EF)of right ventricle were obtained by 3D-STI.Comparison and correlation analysis of parameters was correlated between and within the two groups.Results Compared with the control group,RVGLS,RVFWL,IVSGLS and EF in PS group were lower,and right ventricular EDV and ESV were higher(P<0.05).There was no significant dif-ference in SV between the two groups(P>0.05).In PS group,RVFWSL was significantly correlated with RVGSL(r=0.979,P<0.05),EF were conducted with RVGSL and TAPSE(r=0.657,0.616,P<0.05).Conclusion In children with PS who have normal stroke volume,3D-STI can help to detect the changes of right ventricular systolic function in early stage,and 2D-STI combined with 3D-STI can accurately reflect the changes of right ventricular function in children with PS,and provide basis for clinical evaluation of children's condition.