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Related Experiment Videos

EEG in cough syncope.

A A DeMaria, B F Westmoreland, F W Sharbrough

    Neurology
    |March 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Cough syncope involves brief loss of consciousness triggered by coughing. EEG recordings during episodes show diffuse slowing, suggesting cerebral ischemia, not epilepsy.

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    Area of Science:

    • Neurology
    • Clinical Neurophysiology

    Background:

    • Cough syncope is a rare condition characterized by transient loss of consciousness associated with coughing.
    • The underlying pathophysiology of cough syncope remains incompletely understood.

    Purpose of the Study:

    • To investigate the electroencephalogram (EEG) findings in patients experiencing cough syncope.
    • To explore potential mechanisms and differentiate cough syncope from epileptic seizures.

    Main Methods:

    • Electroencephalograms were performed on 17 patients with a history of cough syncope.
    • Interictal EEGs were analyzed for abnormalities.
    • EEG recordings were obtained during fourteen episodes of cough syncope in six patients.

    Main Results:

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    • Interictal EEGs were normal in 12 patients, minimally abnormal in 4, and moderately abnormal in 1.
    • During cough syncope episodes, EEGs demonstrated diffuse theta and delta slowing.
    • These EEG changes during syncope were similar to those observed in other vasovagal syncope types.
    • Rhythmic or clonic-like movements occurred in 8 patients, but no epileptiform activity was detected.

    Conclusions:

    • The EEG findings during cough syncope episodes suggest a mechanism involving cerebral ischemia due to increased cerebrospinal fluid pressure impairing intracranial circulation.
    • Cough syncope appears distinct from epileptic seizures, despite the presence of motor movements.
    • Further research is warranted to fully elucidate the pathophysiology of this condition.