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Related Experiment Videos

Estimating left ventricular ejection fraction from two-dimensional echocardiograms: visual and computer-processed

M Wong1, S Bruce, D Joseph

  • 1Medical Service, West Los Angeles Veterans Affairs Medical Center, CA 90073.

Echocardiography (Mount Kisco, N.Y.)
|December 10, 1990
PubMed
Summary
This summary is machine-generated.

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Digital echocardiography offers computer-processed ejection fraction (EF) estimates but increases reading time. Computer analysis is best for confirming visual EF in specific ranges and requires good image quality.

Area of Science:

  • Cardiology
  • Medical Imaging
  • Echocardiography

Background:

  • Digital echocardiography enables computer-processed ejection fraction (EF) estimation.
  • This technology may increase physician reading time compared to visual estimation.
  • Assessing the clinical feasibility and accuracy of computer-processed EF is crucial.

Purpose of the Study:

  • To evaluate the practicability and accuracy of computer-processed ejection fraction (EF) estimation.
  • To compare computer-processed EF with visually estimated EF.
  • To determine the impact of physician experience on EF estimation.

Main Methods:

  • Visual EF estimation from videotape or cine-loop displays.
  • Computer-processed EF estimation using digitized endocardial tracings and biplane Simpson's rule.

Related Experiment Videos

  • Comparison of EF estimates between novice fellows and experienced attendings.

    • Main Results:

    • Differences in visual EF estimates between fellows and attendings were minimal (0 +/- 6.4 median SD).
    • Reproducibility confidence intervals for visual and computer-processed EF ranged from 15% to 46%.
    • Inter-method comparison confidence intervals ranged from 7% to 36%.

    Conclusions:

    • Computer-processed EF readings are best reserved for images of reasonable quality.
    • This method is valuable for confirming visually estimated EF within specific clinical ranges (normal to moderately depressed).
    • Computer-processed EF aids in verifying serial changes when accuracy is clinically relevant.