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Contralateral epileptiform transients in stroke (CETS).

N P Verma, K A Kooi

    Epilepsia
    |July 1, 1986
    PubMed
    Summary
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    Researchers describe a new EEG finding in stroke patients called contralateral epileptiform transients in stroke (CETS). These rare, nonperiodic discharges occur opposite the stroke and may indicate other brain or heart issues.

    Area of Science:

    • Neurology
    • Neurophysiology
    • Electroencephalography (EEG)

    Background:

    • Periodic lateralized epileptiform discharges (PLEDs) and bilateral independent periodic transients (BIPLEDs) are known EEG findings in cerebral infarction.
    • These discharges are typically ipsilateral or bilateral in strokes, often associated with hypoxia or infection.

    Purpose of the Study:

    • To introduce and describe a novel EEG phenomenon observed in acute stroke patients.
    • To propose the term "contralateral epileptiform transients in stroke (CETS)" for this new finding.

    Main Methods:

    • Observational study analyzing EEG data from acute stroke patients.
    • Characterization of the morphology, timing, and clinical associations of the identified EEG events.

    Main Results:

    Related Experiment Videos

    • A rare EEG event, termed CETS, was identified, consisting of nonperiodic spikes, sharp waves, or sharp-and-slow waves.
    • These discharges occurred contralaterally to the acute cerebral infarction and were unassociated with clinical seizures.
    • CETS events appeared to have a longer duration compared to PLEDs or BIPLEDs.

    Conclusions:

    • CETS represents a previously undescribed EEG phenomenon in the context of acute stroke.
    • The presence of CETS may suggest underlying contralateral cerebral or cardiac pathology.
    • Further research is warranted to understand the significance and implications of CETS.