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438 Possible Causes for Hypsarrhythmia

  • West Syndrome

    We report on a 3-year-old girl with West syndrome and with focal hypsarrhythmia.[] […] the corpus callosum is important in the generalization of hypsarrhythmia.[] OBJECTIVE: Fast oscillations (FOs) were first explored from scalp electroencephalographic (EEG) data from hypsarrhythmia in West syndrome (infantile spasms) to investigate[]

  • Early Infantile Epileptic Encephalopathy Type 17

    Over her lifetime, neither hypsarrhythmia nor diffuse slow spike-wave pattern were seen.[] […] at around age 3-6 months, and further from hypsarrhythmia to diffuse slow spike-waves at around age 1.[] In 7 of the 9 patients with OS, EEG findings transitioned from suppression-burst pattern to hypsarrhythmia.[]

  • Myoclonic-Astatic Epilepsy

    Infantile spasms (West syndrome) West syndrome usually occurs in the first year of life and consists of the triad of infantile spasms, developmental deterioration, and a hypsarrhythmia[] The origin of hypsarrhythmia and tonic spasms in West syndrome: evidence from a case of porencephaly and hydrocephalus with focal hypsarrhythmia.[] West Syndrome is characterized by infantile spasms, developmental regression, and a specific pattern on electroencephalography (EEG) testing called hypsarrhythmia (chaotic[]

  • Hypothalamic Hamartoma

    Results of electroencephalographic (EEG) study at the time of IS diagnosis showed hypsarrhythmia in two (33%).[] We describe a male infant with Pallister-Hall syndrome who had a large HH presenting with infantile spasms without hypsarrhythmia. [(18)F]fluoro-deoxyglucose positron emission[] These patients may have hypsarrhythmia on initial EEG, and may respond to ACTH treatment with improvement of IS.[]

  • Sturge-Weber Syndrome

    In the presence of epileptic spasms or generalized seizure types, the background may show widespread slowing or hypsarrhythmia.[] Hypsarrhythmia can be seen in those with epileptic spasms. Activation EEG abnormality is enhanced by sleep deprivation and in sleep.[]

  • Early Infantile Epileptic Encephalopathy Type 3

    At five months, inter-ictal EEG revealed hypsarrhythmia, but his attacks were still only myoclonuses.[] The course observation clarifies differences between both syndromes; SBs evolve to hypsarrhythmia around 3-4 months of age, and sometimes further to diffuse slow spike-waves[] All three cases with NKH survived with increasing microcephaly, muscle tonicity; all developed infantile spasm with hypsarrhythmia on EEGs.[]

  • Lissencephaly

    Approximately 80% have infantile spasms, although the EEG does not always show the typical hypsarrhythmia pattern.[]

  • Lennox-Gastaut Syndrome

    There is also a tendency for psychosis to develop with time. 20% of all patients with Lennox-Gastaut syndrome have prior infantile spasms with hypsarrhythmia. [ 3 ] Although[] […] condition characterized by three features: Infantile spasms Developmental regression A pattern of erratic brain activity on electroencephalogram (EEG), which is known as hypsarrhythmia[]

  • Early Infantile Epileptic Encephalopathy Type 2

    […] at around age 3-6 months, and further from hypsarrhythmia to diffuse slow spike-waves at around age 1.[] The seizures evolved to brief tonic spasms, and hypsarrhythmia on EEG was noticed at age of 5 months, indicating the transition to West syndrome.[] VPA, ZNS, PB, and clonazepam were given, but his EEG at the age of 7 mo showed transformation to hypsarrhythmia.[]

  • Familial Infantile Myoclonic Epilepsy

    Ongoing IS (and hypsarrhythmia) have the potential to adversely impact all aspects of brain development.[] Results: All six affected boys had myoclonic seizures and TCS; two had infantile spasms, but only one had hypsarrhythmia.[] : Infantile spasm, IS, X-linked infantile spasm syndrome, X-linked infantile spasms, West's syndrome, Tonic spasms with clustering, arrest of psychomotor development and hypsarrhythmia[]

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