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Related Experiment Videos

Ejection fraction determination by MR imaging: comparison with left ventricular angiography.

E J Stratemeier, R Thompson, T J Brady

    Radiology
    |March 1, 1986
    PubMed
    Summary

    Magnetic resonance (MR) imaging accurately calculates left ventricular ejection fractions (EFs), showing strong linear correlation with traditional methods. This noninvasive technique offers potential clinical utility for assessing cardiac function.

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    Area of Science:

    • Cardiology
    • Medical Imaging
    • Biomedical Engineering

    Background:

    • Accurate assessment of left ventricular ejection fraction (EF) is crucial for evaluating cardiac function.
    • Traditional methods like ventriculography are invasive and carry risks.
    • Noninvasive alternatives are sought for routine clinical use.

    Purpose of the Study:

    • To evaluate the accuracy of left ventricular ejection fractions (EFs) calculated from magnetic resonance (MR) images.
    • To compare MR-derived EF calculations with those obtained from conventional left ventriculography.
    • To assess the potential clinical utility of MR imaging for noninvasive cardiac function evaluation.

    Main Methods:

    • 22 patients underwent both coronary angiography/left ventriculography and MR imaging within 1-3 days.

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  • ECG-gated spin-echo MR images were acquired in end-systole and end-diastole.
  • The area-length method was used to calculate EF from both ventriculograms and MR images.

    • Main Results:

    • Left ventricular ejection fractions calculated from MR images showed a strong linear correlation with those from left ventriculography.
    • Mean differences in EF calculations between observers were lower for MR imaging (2.7 +/- 7.8) compared to ventriculography (5.0 +/- 6.9).
    • MR imaging, with precise orientation to left ventricular axes, enables accurate EF calculation.

    Conclusions:

    • Magnetic resonance imaging provides accurate calculations of left ventricular ejection fractions.
    • MR imaging offers a reliable noninvasive method for assessing cardiac function.
    • This technique has significant potential for clinical application in cardiology.