Cyclic seizures
Written and reviewed by Dr Ibrahim Imam, Consultant Neurologist. Last reviewed .
Cyclic seizures. These are non-convulsive seizures usually seen in critically ill people. Fully referenced neurology checklist.
Pathology
- These are non-convulsive seizures usually seen in critically ill people
- They recur at regular intervals at least three times an hour
- They result from the failure of physiological seizure-terminating mechanisms
- They are usually focal onset and posterior
- They may progress to status epilepticus
- A cyclic and diurnal pattern is also seen in most other seizures
Cyclic patterns
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Risk factors
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Cardiorespiratory features
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Continuous electroencephalogram (EEG)
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Treatment
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Synonym
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References
- Hammer D, Scheuer M, Fong-Isariyawongse J. Pearls & Oy-sters: Cyclic seizures and heart rate variability. Neurology 2021; 96:e1694-e1696.
- Pinto LF, Gilmore EJ, Petroff OA, et al. Cyclic seizures in critically ill patients: Clinical correlates, DC recordings and outcomes. Clin Neurophysiol 2017; 128:1083-1090.
- Friedman DE, Schevon C, Emerson RG, Hirsch LJ. Cyclic electrographic seizures in critically ill patients. Epilepsia 2008; 49:281-287.
- Zorlu MM, Chuang DT, Buyukozkan M, Aydemir S, Zarnegar R. Prognostic significance of cyclic seizures in status epilepticus. J Clin Neurophysiol 2021; 38:516-524.
- Karoly PJ, Goldenholz DM, Freestone DR, et al. Circadian and circaseptan rhythms in human epilepsy: a retrospective cohort study. Lancet Neurol 2018; 17:977-985.
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