hypsarrhythmia

hypsarrhythmia
hyps·ar·rhyth·mia or hyps·arhyth·mia .hips-ā-'rith-mē-ə n an abnormal encephalogram that is characterized by slow waves of high voltage and a disorganized arrangement of spikes, occurs esp. in infants, and is indicative of a condition that leads to severe mental retardation if left untreated
hyps·ar·rhyth·mic or hyps·arhyth·mic -mik adj

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n.
a severe abnormality on an EEG (see electroencephalography) that demonstrates a chaotic pattern of brain activity. It is usually characteristic of infantile spasms.

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hyp·sar·rhyth·mia (hip″sə-rithґme-ə) [hyps- + arrhythmia] an electroencephalographic abnormality sometimes observed in infants, with random, high-voltage slow waves and spikes that arise from multiple foci and spread to all cortical areas. It is seen most commonly in cases of jackknife seizures.

Medical dictionary. 2011.

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  • Hypsarrhythmia — is abnormal interictal high amplitude waves and a background of irregular spikes seen in electroencephalogram, mostly in infant diagnosed with infantile spasms. They both vary in duration and size, have no rhythm or pattern and can alternate… …   Wikipedia

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