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Related Experiment Videos

A system for quantitative evaluation of left ventricular function with two-dimensional ultrasonography

P F Moynihan, A F Parisi, E D Folland

    Medical Instrumentation
    |March 1, 1980
    PubMed
    Summary

    This study introduces a new system for analyzing ultrasound images to measure left ventricular function, including ejection fraction. The noninvasive method accurately assesses cardiac performance and detects regional contraction abnormalities.

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    Area of Science:

    • Cardiology
    • Medical Imaging
    • Ultrasound Technology

    Background:

    • Phased-array ultrasonic imaging systems provide real-time sectional views of the left ventricle.
    • Quantifying left ventricular function is crucial for diagnosing and managing cardiac conditions.

    Purpose of the Study:

    • To develop and evaluate a light-pen-based system for analyzing ultrasound images to quantify left ventricular function.
    • To measure left ventricular volume, ejection fraction, and regional contraction noninvasively.

    Main Methods:

    • A minicomputer-based system was developed to analyze ultrasound image geometry.
    • Measurements were compared to left ventricular cineangiograms from cardiac catheterization in 25 patients.
    • System accuracy was assessed for linear dimensions, end-diastolic volume, and ejection fraction.

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    Main Results:

    • High accuracy was found when comparing echocardiographic measurements to cineangiograms (e.g., ejection fraction r = 0.80, S.E.E. = 0.10).
    • The system detected regional contraction abnormalities in patients with myocardial infarcts.
    • Quantitative two-dimensional echocardiography proved effective for evaluating left ventricular ejection fraction.

    Conclusions:

    • Quantitative two-dimensional echocardiography is a useful noninvasive method for assessing left ventricular ejection fraction.
    • This approach has potential for objectively defining regional contraction abnormalities.