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Interobserver variability in echocardiography.

P A Vignola, A Bloch, A D Kaplan

    Journal of Clinical Ultrasound : JCU
    |August 1, 1977
    PubMed
    Summary
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    This study determined normal echocardiogram values in 146 individuals. Small interobserver variability was found for key echocardiographic parameters, highlighting its importance in research.

    Area of Science:

    • Cardiology
    • Medical Imaging

    Background:

    • Echocardiography is crucial for assessing cardiac structure and function.
    • Establishing normal reference values is essential for accurate interpretation.
    • Interobserver variability can impact the reliability of echocardiographic measurements.

    Purpose of the Study:

    • To establish normal echocardiographic values in a diverse age group.
    • To quantify interobserver variability for commonly measured parameters.
    • To assess the clinical significance of observer variability in echocardiography.

    Main Methods:

    • 146 healthy individuals (3-73 years) underwent high-quality echocardiography.
    • Measurements included mitral diastolic excursion, E-F slope, chamber dimensions, aortic root, and wall thickness.

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  • Two experienced echocardiographers independently analyzed each tracing.

    • Main Results:

    • Normal values were determined for nine key echocardiographic parameters.
    • Significant, though small, interobserver variability was observed for all parameters.
    • 95% confidence limits for variability were calculated.

    Conclusions:

    • Normal echocardiographic values were established across a wide age range.
    • Interobserver variability is a consistent finding in echocardiographic measurements.
    • This variability, while small, warrants consideration in research settings.