Assessment of right ventricular long axis myocardial motion during isovolumic contraction in patients with dilated cardiomyopathy by Doppler tissue imaging
- VernacularTitle:多普勒组织成像评价扩张型心肌病患者右心室长轴心肌等容收缩期运动
- Author:
Lianzhong ZHANG
;
Mingxing XIE
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Cardiomyopathy,dilated;
Myocardial contraction;
Ventricular function,right
- From:
Chinese Journal of Ultrasonography
2003;0(10):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the velocity patterns of right ventricular long axis myocardial motion during isovolumic contraction phase in the patients with dilated cardiomyopathy(DCM) by Doppler tissue imaging(DTI).Methods Right ventricular systolic free wall myocardial(the place close to the tricuspid annular) motion velocities were examined by DTI on apical four-chamber view in 28 patients with DCM and 30 healthy volunteers.Peak positive and negative velocities(V_(IVC1),V_(IVC2)),velocity time integrals(VTI_(IVC1),VTI_(IVC2)),times(T_(IVC1),T_(IVC2)) of right ventricular free wall myocardial motion during isovolumic contraction,and the peak velocity(V_S),time(T_S),velocity time integral(VTI_S) of ejection wave(S) were measured.Right ventricular percent changes in area(RVPCA) on three different views were calculated.Results V_(IVC1),V_S,VTI_S and differential IVC(the difference between V_(IVC1) and V_(IVC2)) in the patients with DCM were significantly decreased than those in control group(P(0.05)).Conclusions The changes of DTI indices of right ventricular long axis myocardial motion during isovolumic contraction in the patients with DCM are characteristic,which could be a new method to evaluate right ventricular systolic function.
