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Published on: February 14, 2017
[Evaluation of left ventricular diastolic function using velocity vector imaging and quantitative tissue velocity
Chuan Zhang1, Dao-Gang Zha, Yi-Li Liu
1Department of Cardiology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Zhonghua Xin Xue Guan Bing Za Zhi
|February 9, 2010
Summary
Velocity Vector Imaging (VVI) and Quantitative Tissue Velocity Imaging (QTVI) effectively assess left ventricular diastolic function. E/Em and Em measurements from these techniques correlate well with left ventricular end-diastolic pressure.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Left ventricular diastolic dysfunction is a critical indicator of cardiac health.
- Accurate assessment of diastolic function is essential for timely diagnosis and management.
- Traditional methods for evaluating diastolic function have limitations.
Purpose of the Study:
- To validate the efficacy of Velocity Vector Imaging (VVI) and Quantitative Tissue Velocity Imaging (QTVI) for assessing left ventricular diastolic function.
- To compare the diagnostic performance of VVI and QTVI against established clinical parameters.
Main Methods:
- Fifty-one patients undergoing left heart catheterization were included.
- Echocardiographic parameters including peak early diastolic velocity (Em), ejection fraction (EF), and mitral valve flow velocity ratio (E/A) were measured.
- The ratio of early mitral inflow to early diastolic velocity (E/Em) was calculated, and left ventricular end-diastolic pressure (LVEDP) was measured via catheterization.
Main Results:
- E/Em derived from VVI and QTVI showed significant correlation with LVEDP (r = 0.808 and r = 0.692, respectively).
- VVI demonstrated a significantly higher correlation coefficient with LVEDP compared to QTVI (P = 0.025).
- Em derived from VVI and QTVI also negatively correlated with LVEDP (r = -0.740 and r = -0.567, respectively), with VVI showing a stronger correlation (P = 0.009).
Conclusions:
- Both VVI and QTVI provide valuable parameters for evaluating left ventricular diastolic function.
- The E/Em and Em parameters derived from VVI and QTVI are reliable indicators of diastolic function.
- VVI shows a superior correlation with LVEDP compared to QTVI, suggesting its enhanced utility.
