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Determination of left ventricular ejection fraction by visual estimation during real-time two-dimensional
American Heart Journal
|September 1, 1982
Summary
Visual estimation of left ventricular ejection fraction (LVEF) using two-dimensional echocardiography (2DE) closely approximates nuclear angiography and left ventriculography. This reliable method offers instantaneous assessment of ventricular function without complex equipment.
Area of Science:
- Cardiology
- Medical Imaging
- Echocardiography
Background:
- Left ventricular (LV) cross-sectional area reduction correlates with ejection fraction (EF).
- Accurate EF assessment is crucial for diagnosing and managing cardiac disease.
Purpose of the Study:
- To evaluate the reliability of visually estimating LV ejection fraction (LVEF) using two-dimensional echocardiography (2DE).
- To determine if 2DE visual estimation can replace complex calculations and equipment for real-time EF assessment.
Main Methods:
- Prospective evaluation of 25 adult patients with cardiac disease.
- Visual estimation of LVEF via 2DE short-axis view, assessing percent area reduction.
- Comparison with gated nuclear angiography and cardiac catheterization with left ventriculography.
Main Results:
- 2DE visual LVEF estimates showed high correlation with gated nuclear angiography (r = 0.927).
- 2DE visual LVEF estimates also correlated strongly with left ventriculography (r = 0.935).
- Consensus among blinded reviewers ensured reliable EF values.
Conclusions:
- Visual LVEF estimation by 2DE is a reliable and instantaneous method for assessing ventricular function.
- This technique eliminates the need for digitizers, planimetry, or complex calculations.
- Echocardiographers can readily implement this method for efficient cardiac assessment.