Flat Electroencephalogram

flat electroencephalogram

n.

An electroencephalogram indicating the absence of electric potentials of cerebral origin, indicative under certain specified conditions of cerebral death. Also called isoelectric electroencephalogram.

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flat electroencephalogram,

a graphic chart on which no tracings are recorded during electroencephalography, indicating a lack of brain wave activity. Flat readings are indicative of brain death except in cases of profound hypothermia and central nervous system depression. Also called isoelectric electroencephalogram. See also brain death.

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Electrocerebral Silence

An EEG without cerebral activity over 2 µv from symmetrically placed electrode pairs > 10 cm apart, and with interelectrode resistance between 100 and 10,000 ohms; if present for 30 minutes in a clinically brain dead adult—and if drug intoxication, hypothermia, and recent hypotension have been excluded—the diagnosis of cerebral death is supported