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Related Experiment Videos

Ejection fraction determination without planimetry by two-dimensional echocardiography: a new method.

A O Baran, G J Rogal, N C Nanda

    Journal of the American College of Cardiology
    |June 1, 1983
    PubMed
    Summary

    Two new echocardiography methods accurately measure ejection fraction. Method B is superior for patients with wall motion abnormalities, providing excellent results without planimetry.

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    Area of Science:

    • Cardiology
    • Medical Imaging
    • Echocardiography

    Background:

    • Accurate ejection fraction measurement is crucial for diagnosing and managing heart conditions.
    • Traditional methods can be limited, especially in patients with left ventricular wall motion abnormalities.

    Purpose of the Study:

    • To assess the accuracy and reproducibility of two novel two-dimensional echocardiography methods for determining ejection fraction.
    • To compare these methods against angiography and nuclear scanning, particularly in patients with and without wall motion abnormalities.

    Main Methods:

    • Method A: Measured left ventricular minor and major axes at midventricle using a modified cylinder-ellipse algorithm.
    • Method B: Measured regional left ventricular minor axes at three levels, averaged for total ejection fraction using the same algorithm.

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  • Both methods were validated against single-plane cineangiography and gated nuclear scanning; reproducibility was assessed via interobserver comparison.

    • Main Results:

    • Method B demonstrated higher correlation coefficients (r=0.90) compared to Method A (r=0.79) for all patients.
    • In patients with wall motion abnormalities, Method B (r=0.82) significantly outperformed Method A (r=0.38).
    • Both methods showed high correlation in patients without wall motion abnormalities (Method A: r=0.85, Method B: r=0.88).

    Conclusions:

    • Two-dimensional echocardiography can accurately measure ejection fraction without planimetry using these novel methods.
    • Method B is particularly effective for patients with echocardiographic wall motion abnormalities, offering excellent results.
    • Method A is a simpler, sufficient option for patients without wall motion abnormalities.