hypsarrhythmia

Hypsarrhythmia rarely persists beyond the age of 24 months.

Hypsarrhythmia with a consistent focus of abnormal discharge.

Hypsarrhythmia with little spike or sharp activity.

Hypsarrhythmia with episodes of voltage attenuation.

Based on what is known today, the prognosis depends mainly on the cause of the attacks and the length of time that hypsarrhythmia lasts.

Hypsarrhythmia with increased interhemispheric synchronization.

Asymmetric hypsarrhythmia.

PEHO syndrome is a progressive encephalopathy with edema, hypsarrhythmia and optic atrophy.

Gibbs and Gibbs described hypsarrhythmia in 1952 as "...random high voltage waves and spikes.

The "H" in PEHO syndrome stands for hypsarrhythmia.

In most cases of infantile spasms, hypsarrhythmia either disappears or improves during a cluster of spasms and/or REM sleep.

West syndrome is a triad of developmental delay, seizures termed infantile spasms, and EEG demonstrating a pattern termed hypsarrhythmia.

West syndrome in modern usage is the triad of infantile spasms, a pathognomonic EEG pattern (called hypsarrhythmia), and developmental regression - although the international definition requires only two out of these three elements.

Hypsarrhythmia is an abnormal interictal pattern, consisting of high amplitude and irregular waves and spikes in a background of chaotic and disorganized activity seen on electroencephalogram (EEG), and frequently encountered in an infant diagnosed with infantile spasms, although it can be found in other conditions.