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[Value of quantitative tissue velocity imaging in the evaluation of cardiac function and diagnosis of left heart
Wei Qiao1, Xiao-ping Zhang, Duan Qian
1Department of Senior Ward, China-Japan Friendship Hospital, Beijing 100029, China.
Insights
Quantitative tissue velocity imaging (QTVI) effectively assesses cardiac function and diagnoses left heart failure (HF). QTVI
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Left heart failure (HF) significantly impacts cardiac function.
- Accurate assessment of cardiac function is crucial for HF diagnosis and management.
- Conventional echocardiography has limitations in evaluating subtle changes in systolic function.
Purpose of the Study:
- To evaluate the diagnostic value of quantitative tissue velocity imaging (QTVI) in assessing cardiac function.
- To determine the utility of QTVI in diagnosing left heart failure (HF).
Main Methods:
- 30 HF patients and 32 controls underwent conventional echocardiography and QTVI.
- Mitral annulus peak systolic velocity (Vs) and systolic displacement (Ds) were measured using QTVI.
- Correlation with left ventricular ejection fraction (LVEF) and diagnostic accuracy were analyzed.
Main Results:
- Mean Vs and Ds were significantly lower in HF patients compared to controls (P < 0.01).
- QTVI parameters (Vs and Ds) improved after treatment in HF patients (P < 0.01).
- Mean Vs and Ds showed strong positive correlation with LVEF (r = 0.87-0.89, P < 0.01).
- QTVI demonstrated high accuracy (95.1%) in diagnosing left HF using specific cut-off values for Vs and Ds.
Conclusions:
- QTVI effectively evaluates left ventricular systolic function.
- QTVI is a valuable diagnostic tool for left heart failure (HF).
Objective:
To investigate the value of quantitative tissue velocity imaging (QTVI) echocardiography in the evaluation of cardiac function and the diagnosis of left heart failure.
Methods:
30 heart failure (HF) patients, aged 66 +/- 12 (39 - 86), and 32 normal controls, 66 +/- 12 (40 - 82) underwent conventional echocardiography, and QTVI. Left ventricular ejection fraction (LVEF) was calculated by Simpson's formula. Mitral annulus peak systolic velocity (Vs) and systolic displacement (Ds) from posteroseptal, lateral, anteroseptal, posterior, anterior, and inferior segments were determined by QTVI, and the mean Vs and Ds were calculated. The values of mean Vs and Ds of the HF patients and those of the normal controls, and the values of mean Vs and Ds of the HF patients before and after treatment were compared. The correlation of the mean Vs and Ds with LVEF was analyzed.
Results:
The mean Vs of the HF patients was 2.8 cm/s +/- 0.6 cm/s, significantly lower than that of the normal controls (6.4 cm/s +/- 0.9 cm/s, P < 0.01). The mean Vs of the HF patients after treatment was 3.5 cm/s +/- 1.1 cm/s, significantly higher than that before treatment (2.8 cm/s +/- 0.6 cm/s, P < 0.01). The mean Ds of the HF patients was 5.2 mm +/- 1.5 mm, significantly lower than that of the normal controls (11.6 mm +/- 1.5 mm, P < 0.01). The mean Ds of the HF patients after treatment was 6.5 mm +/- 2.0 mm, significantly higher than that before treatment (5.2 mm +/- 1.5 mm, P < 0.01). The mean Vs and mean Ds were positively correlated with LVEF (r = 0.87, P < 0.01, and r = 0.89, P < 0.01). The area under the curve (AUC) of receiver operator characteristic (ROC) was 0.95 for the mean Vs to diagnose HF. The mean Vs < or = 4.42 cm/s was used as a cut-off point to diagnosis left HF with a sensitivity of 97.5% a specificity of 90.2%, and an accuracy rating of 95.1%. The AUC of ROC was 0.96 for the mean Ds to diagnose HF. The mean Ds < or = 8.49 mm was used as a cut-off point to diagnose left HF with a sensitivity of 97.5%, a specificity of 87.8%, and an accuracy rating was 95.1%.
Conclusion:
The mean systolic velocity and mean systolic displacement of mitral annulus determined by QTVI help evaluate the left ventricular systolic function. The value of the diagnosis is significant in left HF.
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