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Related Experiment Videos

Rapid, semiautomated technique for estimating left ventricular volume.

N E Kantrowitz, I Schnittger, A Schwarzkopf

    American Heart Journal
    |September 1, 1983
    PubMed
    Summary

    A new system uses a calibrated ellipse on two-dimensional echocardiography to quickly measure left ventricular volume. This rapid method shows good accuracy for assessing cardiac function in patients.

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    Area of Science:

    • Cardiology
    • Medical Imaging
    • Echocardiography

    Background:

    • Accurate quantification of left ventricular (LV) volume is crucial for diagnosing and managing cardiac diseases.
    • Traditional methods for LV volume measurement can be time-consuming and operator-dependent.
    • Two-dimensional echocardiography (2DE) offers a non-invasive approach, but accurate volumetric analysis remains a challenge.

    Purpose of the Study:

    • To evaluate a novel system for rapid quantification of left ventricular volume using 2DE.
    • To assess the accuracy and usability of this new system compared to established techniques.

    Main Methods:

    • A microprocessor-integrated sector scanner was used to calculate LV dimensions based on an ellipsoid of revolution model.
    • Operators superimposed a calibrated ellipse on the endocardial border of the LV image.

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  • LV volumes were measured in 50 patients with various cardiac conditions and compared with cineangiography, M-mode echocardiography, and light pen tracing.

    • Main Results:

    • The calibrated ellipse system demonstrated good correlation with cineangiography for LV volumes (r = 0.820, SEE +/- 38.8 ml).
    • Light pen tracing of 2DE images showed a slightly better correlation with angiography (r = 0.847, SEE +/- 27.8 ml).
    • M-mode echocardiography exhibited a lower correlation with angiography (r = 0.789, SEE +/- 42.1 ml).

    Conclusions:

    • The calibrated ellipse system provides a rapid and user-friendly method for quantifying left ventricular volume using 2DE.
    • Its accuracy is comparable to previous 2DE techniques, making it a viable option for clinical assessment.
    • This system offers a practical advancement in non-invasive cardiac volume measurement.