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Cardiac motion in total electrical alternans

J J Rozanski, M Kleinfeld

    Chest
    |March 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Massive pericardial effusion can cause the heart to swing visibly, leading to electrical alternans. This occurs due to the heart

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    Area of Science:

    • Cardiology
    • Cardiac Electrophysiology
    • Medical Imaging

    Background:

    • Massive pericardial effusion can lead to significant cardiac compromise.
    • Electrical alternans on electrocardiogram (ECG) is a known, albeit uncommon, finding in pericardial effusion.

    Observation:

    • Gross pendular motion of the heart was observed during cardiac catheterization.
    • This motion occurred at approximately half the patient's heart rate.
    • Simultaneous electrocardiogram showed electrical alternans.

    Findings:

    • The observed cardiac motion directly correlated with the presence of electrical alternans.
    • These findings support the hypothesis linking cardiac displacement to electrical alternans in pericardial effusion.

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    Implications:

    • Understanding the mechanical-electrical interaction in effusion is crucial for diagnosis.
    • This provides a potential mechanism for electrical alternans in pericardial effusion.
    • Highlights the importance of considering cardiac position in interpreting ECG abnormalities.