Evaluation of longitudinal segmental myocardial strain and displacement of left ventricle using ultrasound speckle tracking imaging
- VernacularTitle:超声斑点成像技术评价左心室长轴心肌节段应变与位移
- Author:
Qingguo MENG
;
Lixue YIN
;
Chunmei LI
;
Mingliang ZUO
;
Anguo LUO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2003;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess longitudinal segmental myocardial strain(?),displacement(D) and the changes of the inner dimension of left ventricle(?L),and to establish their spatial correlationship during cardiac pacing and conductive block.Methods The standard apical four chamber view of left ventricle were acquired during cardiac pacing(n=12),right bundle branch block(RBBB,n=13) and sinus rhythm(n=14) using GE Vivid 7 dimension and the M3S probe with(4.0) MHz for the analysis of the longitudinal myocardial segmental(apical and basal segments) ? and D of left ventricle with two dimensional strain analysis software.The maximal and change longitudinal dimension of left ventricle was measured and calculated at end-diastole and end-systole respectively.The differences of the above parameters were compared and the spatial correlationships among them were analyzed.Results The peak ? of the septal basal segment during cardiac pacing was significant higher than that of the apical segment.There were significant differences in the peak D and(?D)(D_(basal)-D_(apical)) at lateral wall among sinus rhythm,RBBB and pacing group(P
