[Evaluation of left ventricular diastolic function using velocity vector imaging and quantitative tissue velocity imaging].
OBJECTIVE
To validate the efficacy of velocity vector imaging (VVI) and quantitative tissue velocity imaging (QTVI) for evaluating left ventricular diastolic function.


METHODS
Fifty-one patients underwent left heart catheterization were included in this study. Mean of peak early diastolic velocity (Em), EF and the ratio of early (E) to late (A) mitral valve flow velocity (E/A) were measured by echocardiography and the ratio of E to Em (E/Em) was calculated. Left ventricular end diastolic pressure (LVEDP) was measured during catheterization examination.


RESULTS
E/Em derived from VVI or QTVI was significantly correlated with LVEDP (r = 0.808, P < 0.01 and r = 0.692, P < 0.01, respectively) and the correlation coefficient between VVI and LVEDP was significantly higher than that between QTVI and LVEDP (Z = 2.246, P = 0.025). Em derived from VVI and QTVI also negatively correlated with LVEDP (r = -0.740, P < 0.01 and r = -0.567, P < 0.01) and the correlation coefficient between VVI and LVEDP was significantly higher than that between QTVI and LVEDP (Z = 2.595, P = 0.009). However, there was no correlation between E/A and LVEDP (r = 0.117, P = 0.415).


CONCLUSIONS
E/Em and Em derived from VVI and QTVI are valuable parameters for evaluating LV diastolic function.
Zhang
Chuan
C
Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Zha
Dao-Gang
DG
Liu
Yi-Li
YL
Wang
Peng
P
Hou
Yu-Qing
YQ
Xiu
Jian-Cheng
JC
Wang
Yue-Gang
YG
Zhou
Zhong-Jiang
ZJ
D001783:Blood Flow Velocity; D006328:Cardiac Catheterization; D003971:Diastole / Q000502:physiology*; D004452:Echocardiography / Q000379:methods*; D006801:Humans; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000502:physiology; D015203:Reproducibility of Results; D016277:Ventricular Function, Left / Q000502:physiology*