16 Possible Causes for Hypsarrhythmia in USA

    • Postictal State

      ", keywords "Child, Electroencephalography, Hypsarrhythmia, Infantile spasms, Neurologic manifestations, West syndrome", author "L. … Although it was independent from the etiology of the spasms, persisting hypsarrhythmia during a cluster of spasms appeared to be an EEG pattern that correlated with a favorable … KW - Child KW - Electroencephalography KW - Hypsarrhythmia KW - Infantile spasms KW - Neurologic manifestations KW - West syndrome UR - UR - M3 - Article VL - 34 SP - 671[1]

    • West Syndrome

      Asymmetric hypsarrhythmia. … Hypsarrhythmia with little spike or sharp activity. … Hypsarrhythmia with episodes of voltage attenuation.[2]

    • Foix-Chavany-Marie Syndrome

      EEG is a vital test, which is done to find out hypsarrhythmia, as this is crucial to the diagnosis. … The prognosis primarily depends on the cause of the attacks and the duration of the hypsarrhythmia. … West syndrome consists of a triad of infantile spasms, mental retardation and a pathognomonic EEG pattern known as hypsarrhythmia.[3]

    • Partington Syndrome

      Lux: Is hypsarrhythmia a form of non-convulsive status epilepticus in infants? … Recently, hypsarrhythmia has been thought to be a form of non-convulsive status epilepticus (51). … Approximately 75% of EIEE1 and EIEE4 patients progress to WS, which is characterized by tonic spasms with clustering, arrest of psychomotor development, and hypsarrhythmia[4]

    • Angelman Syndrome

      Differential diagnosis Differential diagnosis includes hypsarrhythmia in West syndrome or the petit mal variant pattern in Lennox-Gastaut syndrome (see these terms).[5]

    • Congenital Disorders

      Patients with CDG-IIm exhibit early-infantile epileptic encephalopathy, developmental delay, hypotonia, variable ocular anomalies, seizures, hypsarrhythmia, poor feeding, … The single patient thus far identified with this form of CDG exhibited severe psychomotor retardation, spasms, hypsarrhythmia, and irregular nystagmus (involuntary eye movements … […] suffer severe neurological impairment including profound psychomotor retardation and intractable seizures, eye abnormalities, optic atrophy, postnatal microcephaly, and hypsarrhythmia[6]

    • Aicardi's Syndrome

      The combination of infantile spasms and an EEG pattern called ‘hypsarrhythmia’ is known as West syndrome .[7]

    • Neonatal Meningitis

      The electroencephalogram showed hypsarrhythmia intercepted by multifocal and generalized paroxysmal discharges and the brain MRI revealed a large right frontal cystic lesion[8]

    • Jacksonian Seizure

      Hypsarrhythmia is the abnormally high amplitude waves and a background of irregular spikes seen in EEG. … The hypsarrhythmia pattern seen on the EEG is a grossly disorganized pattern of electrical brain activity. … […] j vu, EEG, electroencephalogram, electrolyte, febrile seizures, focal seizure, generalized seizure, grand mal seizure, hippocampus, hyperglycemia, hypoglycemia, hypoxia, hypsarrhythmia[9]

    • Cerebellar Atrophy

      These become refractory as documented by the EEG which shows severe background slowing, multifocal origins, and hypsarrhythmia.[10]

    Further symptoms

    Similar symptoms


    1. Ictal clinical electroencephalographic findings of spasms in West syndrome — Italian Ministry of Health,…
    2. Hypsarrhythmia - Wikipedia,
    3. West's Syndrome|Causes|Symptoms|Treatment|Life Expectancy|Prognosis,
    4. [Frontiers in Bioscience E2, 701-710, January 1, 2010],
    5. Orphanet: Angelman syndrome,…
    6. Congenital Disorders of Glycosylation, CDG,
    7. Aicardi syndrome | Epilepsy Action,…
    8. Neonatal Citrobacter koseri Meningitis: Report of Four Cases,
    9. Epilepsy - Williamson Street Co-op,…
    10. cerebellar atrophy | Hereditary Ocular Diseases,…