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Related Experiment Videos

Rapid freehand scanning three-dimensional echocardiography: accurate measurement of left ventricular volumes and

Junichi Kawai1, Kazuaki Tanabe, Shigefumi Morioka

  • 1Health Science, Kobe University Graduate School of Medicine, Japan.

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|February 8, 2003
PubMed
Summary

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Rapid 3-dimensional echocardiography (3DE) offers a quick and accurate method for measuring left ventricular (LV) volumes and ejection fraction. This advanced technique shows high correlation and agreement with gated single photon emission computed tomography.

Area of Science:

  • Cardiovascular Imaging
  • Medical Ultrasound Technology
  • Cardiac Function Assessment

Background:

  • Traditional 2-dimensional echocardiography has limitations in accurately quantifying left ventricular (LV) volumes and ejection fraction.
  • Quantitative gated myocardial perfusion single photon emission computed tomography (SPECT) is a recognized reference standard for cardiac function assessment.

Purpose of the Study:

  • To evaluate the clinical feasibility of rapid freehand scanning 3-dimensional echocardiography (3DE) for LV volume and ejection fraction measurement.
  • To compare the accuracy and precision of 3DE against gated SPECT as the reference standard.

Main Methods:

  • Transthoracic 2-dimensional echocardiography and magnetic freehand 3DE were performed in 15 patients.
  • 3DE data acquisition involved fan-like scanning in the apical position, with data collected in 10-20 seconds.

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  • Analysis was completed within 2 minutes of data transfer.

    • Main Results:

    • 3DE demonstrated high correlation and agreement with gated SPECT for LV end-diastolic volume (r=0.94) and LV end-systolic volume (r=0.96).
    • 2-dimensional echocardiography showed underestimation of volumes with wider limits of agreement compared to SPECT.
    • 3DE provided precise and accurate LV ejection fraction measurements (r=0.93) compared to 2-dimensional echocardiography.

    Conclusions:

    • Rapid freehand 3DE is clinically feasible for precise and accurate measurement of LV volumes and ejection fraction.
    • 3DE offers a significant improvement over 2-dimensional echocardiography for cardiac function assessment.
    • This technique provides a valuable, rapid alternative to SPECT for evaluating LV performance.