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Automated on-line quantification of left ventricular ejection fraction by echo
1Department of Cardiology, Christian Medical College Hospital, Vellore.
Indian Heart Journal
|May 1, 1996
Summary
A new automated system accurately measures left ventricular ejection fraction (LVEF) using ultrasound, correlating well with traditional methods. This faster, reliable LVEF assessment offers clinical advantages.
Area of Science:
- Cardiovascular Imaging
- Echocardiography
- Medical Ultrasound
Background:
- Left ventricular ejection fraction (LVEF) is a critical measure of cardiac function.
- Traditional methods for LVEF assessment include angiography and manual 2D echocardiography.
- Automated border detection using acoustic properties of ultrasound offers a novel approach.
Purpose of the Study:
- To evaluate the reliability of an automated border detection system for LVEF measurement.
- To compare automated LVEF with angiocardiographic and manual 2D-echo derived LVEF.
- To assess the time efficiency of the automated method.
Main Methods:
- Development of an automated border detection system utilizing ultrasound acoustic backscatter.
- Comparison of automated LVEF with angiocardiographic (gold standard) and manual 2D-echo (modified Simpson method) in 49 patients.
- Statistical analysis of correlation coefficients and time taken for measurements.
Main Results:
- Automated LVEF demonstrated excellent correlation with angiocardiographic LVEF (r = 0.91).
- Automated LVEF also showed excellent correlation with manual 2D-echo LVEF (r = 0.9).
- Automated border detection was significantly faster than manual methods (40.9s vs 58.6s, p < 0.001).
Conclusions:
- Acoustic quantification of LVEF using automated border detection is a reliable method.
- The automated system provides beat-to-beat LVEF values comparable to established techniques.
- Automated LVEF assessment is more time-efficient than manual echocardiography.