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Related Experiment Videos

"Alpha-like" rhythms in electroencephalograms in coma after cariac arrest.

S Chokroverty

    Neurology
    |July 1, 1975
    PubMed
    Summary

    Electroencephalograms (EEGs) revealed alpha-like rhythms in comatose patients post-cardiac arrest. Daily EEGs are recommended to identify these patterns and aid in prognosis after cardiac arrest.

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    Area of Science:

    • Neurology
    • Critical Care Medicine
    • Neurophysiology

    Background:

    • Comatose patients after cardiac arrest often exhibit complex electroencephalogram (EEG) patterns.
    • Understanding EEG findings is crucial for predicting neurological outcomes.

    Purpose of the Study:

    • To analyze the occurrence and significance of "alpha-like" rhythms in EEGs of comatose patients following cardiac arrest.
    • To differentiate these patterns from other neurological conditions.

    Main Methods:

    • Electroencephalograms (EEGs) were recorded for 12 comatose patients after cardiac arrest.
    • EEG patterns were analyzed for specific rhythms, reactivity, and topographical features.
    • Clinical outcomes, including survival and neurological status, were documented.

    Main Results:

    • "Alpha-like" rhythms were observed in the EEGs of 12 comatose patients post-cardiac arrest.
    • Four patients showed a stage II sleep pattern, and two exhibited EEG reactivity.
    • Outcomes varied: one patient recovered with minimal memory impairment, one survived for 3 months, and 10 died within 3-30 days.
    • Brain examinations revealed anoxic lesions or "respirator brain" in some patients.
    • Similar but distinct EEG patterns were noted in three patients with ventral pontine syndrome.

    Conclusions:

    • "Alpha-like" rhythms in EEGs of comatose patients after cardiac arrest warrant careful daily monitoring.
    • These EEG patterns, while distinct from ventral pontine syndrome, require further investigation for prognostic value.
    • Regular EEG recordings are essential for recognizing and interpreting these findings in post-cardiac arrest care.

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