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Related Experiment Videos

Theta pattern coma, a variant of alpha pattern coma.

V M Synek, B J Synek

    Clinical EEG (Electroencephalography)
    |April 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

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    Two comatose patients exhibited dominant 5Hz theta activity on electroencephalograms (EEG), a pattern potentially linked to malignant "alpha pattern coma" and preceding fatal outcomes. This EEG finding may indicate severe brain injury in critical care settings.

    Area of Science:

    • Neurology
    • Neurophysiology

    Background:

    • Coma is a critical state of impaired consciousness.
    • Electroencephalography (EEG) is vital for assessing brain function in comatose patients.

    Observation:

    • Two elderly comatose patients presented with dominant, rhythmic, and areactive 5Hz theta activity on EEG.
    • This pattern was maximal anteriorly in one patient with severe head trauma and herniation.
    • The second patient, with hypoxic brain injury, showed similar rhythmic 5-6 Hz activity before death.

    Findings:

    • The observed areactive 5Hz theta activity may represent a specific EEG pattern in severe brain injury.
    • This EEG pattern was associated with a fatal outcome in both reported cases.
    • The rhythmic theta activity could be a variant of the previously described malignant "alpha pattern coma".

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    Implications:

    • This EEG pattern warrants further investigation as a potential prognostic indicator in critically ill patients.
    • Recognizing this specific EEG signature may aid in clinical decision-making and patient management.
    • Further research is needed to confirm the association between this theta activity and malignant coma.