Evaluation of left ventricular systolic function by measuring the mitral annular displacement with speckle tracking imaging
10.3760/cma.j.issn.1004-4477.2010.01.002
- VernacularTitle:超声斑点追踪技术测量二尖瓣环位移评价左心室收缩功能的临床研究
- Author:
Xin LIU
;
Jianhua WANG
;
Xiaohong GONG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Mitral annular displacement
- From:Chinese Journal of Ultrasonography
2010;19(1):5-7
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of peak systolic displacement of mitral annulus in evaluating left ventricular systolic function by speckle tracking imaging(STI).Methods The study population consisted of 96 subjects. The apical four-chamber view and two-chamber view were obtained and the systolic displacements of mitral annulus were measured at lateral, spetum, anterior and inferior mitral annulus (MADlat, MADsep, MADant, MADinf).The systolic displacements of mitral annulus midpoint (MADmid) and its ratio to the length of left ventricle at end-diastole(MADmid%) were calculated.Left ventricular ejection fraction(LVEF) was measured by three-dimensional echocardiography.The correlation of these displacements parameter with LVEF was analyzed.Results ① There was no significant difference among MADsep, MADlat, MADant, MADinf and MADmid(P>0.05).②There was significant correlation between LVEF and these parameters (P <0.01) ,and MADmid and MADmid% showed an excellent correlation with LVEF (r = 0.87 and 0.89 respectively, P<0.01).③The cut-off value of MADmid for LVEF>50% was 8.9 mm with a sensitivity of 95% and a specificity of 80% while the cut off value of MADmid% for LVEF>50% was 10.9% with a sensitivity of 95% and a specificity of 85%.Conclusions Displacement of mitral annulus by STI showed an excellent correlation with LVEF, and it may be a new promising method for routine evaluation of left ventricular systolic function with its high feasibility, simplicity and accuracy.
