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Related Experiment Videos

The pericardial effusion pattern on phase images.

C M Pavel, J Kahn, S Rich

    Clinical Nuclear Medicine
    |February 1, 1984
    PubMed
    Summary
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    Pericardial effusion significantly impacts gated cardiac imaging phase patterns. A typical phase pattern (IV) is highly specific for effusion, aiding diagnosis and monitoring treatment response.

    Area of Science:

    • Cardiology
    • Medical Imaging
    • Nuclear Cardiology

    Background:

    • Pericardial effusion can alter cardiac function and imaging parameters.
    • Gated myocardial perfusion imaging (MPI) provides functional information.
    • Phase analysis of gated studies is sensitive to changes in wall motion and timing.

    Purpose of the Study:

    • To investigate the effect of pericardial effusion on phase images in gated cardiac studies.
    • To correlate phase pattern changes with the presence and size of pericardial effusion.
    • To assess the diagnostic utility of phase analysis for detecting pericardial effusion.

    Main Methods:

    • Studied 26 patients with suspected or known pericardial effusion, correlating with echocardiography and clinical data.
    • Compared phase image patterns and parameters to normal subjects and patients with regional wall motion abnormalities.

    Related Experiment Videos

  • Graded phase patterns into five categories (0-IV) based on histogram, pattern, and regional delays.

    • Main Results:

    • A typical phase pattern (IV) was observed in 4/6 patients with large effusions, showing abnormal left ventricular histogram parameters.
    • Category IV pattern demonstrated 100% specificity for pericardial effusion.
    • Combination of categories IV or III showed 87.5% specificity and 61% sensitivity for large and moderate effusions.
    • Therapeutic drainage led to pattern changes towards normal (0 or I).

    Conclusions:

    • Phase analysis of gated cardiac studies can effectively detect and assess pericardial effusion.
    • The typical phase pattern (IV) is a strong indicator of pericardial effusion.
    • Changes in phase patterns after intervention reflect successful management of pericardial effusion.