Non-epileptic paroxysmal events in Rett syndrome: A systematic review of case-based and observational evidence.
Natasha Bhatti, Daniel E Lumsden
PMID 41287144WHAT IT FOUND
Many paroxysmal events in Rett syndrome are non-epileptic.
Misclassification is frequent. Clinicians should use video EEG or detailed phenomenological descriptions to distinguish these from seizures, avoiding inappropriate antiepileptic treatment.
Key findings
01Respiratory abnormalities, including apnoea and hyperventilation, are the most commonly reported non-epileptic paroxysmal events in Rett syndrome.
02A significant proportion of events reported by families or clinicians as seizures are not epileptic, with one study finding 82% of such episodes were non-epileptic on video EEG.
03The term 'Rett episodes' has conflicting definitions across studies, leading the authors to recommend describing events phenomenologically instead.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
Most included studies were low or moderate quality, with only 3.2% rated as high quality. Patient samples were often convenience-based or from tertiary centres, limiting generalizability. Definitions of Rett syndrome and event classification have evolved over time, introducing heterogeneity. The review did not include stereotypic hand movements, which are core to the diagnosis but distinct from paroxysmal events. Pooled prevalence figures are descriptive only and not precise estimates.
Declared interests
One author (DEL) has undertaken consultancy work for Acadia and Neurogene. No other funding sources were declared.
The easy way to misread this
Do not assume that paroxysmal events in Rett syndrome are epileptic seizures. This review shows high rates of misclassification, where non-epileptic respiratory or behavioural events are often mistaken for seizures, leading to unnecessary treatment.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →