Value of using two-dimensional speckle tracking imaging in evaluating left atrial function of patients with different shunting of ventricular septal defect

ZHANG Limin; Wang Yanqiu; SUN Yunlong; LI Sha; YANG Jun; MA Chunyan

doi:10.3969/j.issn.1002-266X.2016.05.003

Abstract：Objective To invesitgate the value of using two-dimensional speckle tracking imaging (2D-STI) in quantita-tive assessment of left atrial (LA) function of children with different shunting of ventricular septal defect (VSD).Methods To-tally 53 patients with VSD were divided into three groups:the large group (VSDL group, 13 cases), the moderate group (VSDM group, 19 cases) and the small group (VSDS group, 21 cases).In addition, 35 healthy subjects were selected as the control group.Then QP/Qs was calculated;the parameters of LA diameter (LADs), maximum volum (LAVmax), minimum volume (LAVmin), left atrial ejection fraction and volume index (LAVI) and LA longitudinal systolic strain (LS), longitudinal systolic strain rate ( LSR-s), longitudinal early diastole strain rate (LSR-e) and longitudinal late diastole strain rate (LSR-a) in each group were measured to assess the LA functions by 2D-SIT.Results The QP/Qs was increased with the increasing defect size of patients (all P<0.05).The LADs in the VSDL group was the larger than that of the other groups (all P<0.05).The LAVmax, LAVmin and LAVI in the VSDM and VSDL groups were larger than those of the control and VSDs groups (all P<0.05), and the VSDL group was lager than the VSDM group (all P<0.05).The LS, LSR-s and LSR-e in the VSDM and VSDL groups were de-creased as compared with those of the other groups (all P<0.05), and the VSDL group was more significant (all P<0.05).The LSR-a in the VSDM and VSDL groups were higher than that of the control and VSDs groups (all P<0.05) and there were signifi-cant differences between the VSDM and VSDL groups (P<0.05).Conclusion For patients with moderate or severe VSD, the storage and piping functions of left atrium are decreased, but the pump function is enhanced;and 2D-STI has important value in assessment of left atrial function in children with VSD.