Electroencephalogram in Subacute Progressive Encephalitis

Cobb, W. A.; Hill, D J

doi:10.1093/brain/73.3.392

Cited by 169 publications

(61 citation statements)

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“…They consist of lateralized complexes, usually recurring every 1.0 to 2.0 seconds, and often (but not always) appear as sharp waves or spikes which may be followed by a slow wave [2][3][4] . Cobb et al 1 , in 1950, attributed the periodicity of the discharges to a disconnection of the cortex from the subcortical structures, usually caused by a large white matter lesion. After that, Chatrian et al 14 , through experimental studies with pathological specimens, showed that a lesion anywhere can be associated with PLEDs.…”

Section: Periodic Lateralized Epileptiform Dischargespledsmentioning

confidence: 99%

Periodic EEG patterns: importance of their recognition and clinical significance

Andraus

Alves-Leon

2012

Arq. Neuro-Psiquiatr.

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Periodic electroencephalographic (EEG) patterns consist of discharges usually epileptiform in appearance, which occur at regular intervals, in critical patients. They are commonly classified as periodic lateralized epileptiform discharges (PLEDs), bilateral independent PLEDs or BIPLEDs, generalized epileptiform discharges (GPEDs) and triphasic waves. Stimulus-induced rhythmic, periodic or ictal discharges (SIRPIDs) are peculiar EEG patterns, which may be present as periodic discharges. The aim of this study is to make a review of the periodic EEG patterns, emphasizing the importance of their recognition and clinical significance. The clinical significance of the periodic EEG patterns is uncertain, it is related to a variety of etiologies, and many authors suggest that these patterns are unequivocally epileptogenic in some cases. Their recognition and classification are important to establish an accurate correlation between clinical, neurological, laboratorial and neuroimaging data with the EEG results.

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Section: Periodic Lateralized Epileptiform Dischargespledsmentioning

confidence: 99%

Periodic EEG patterns: importance of their recognition and clinical significance

Andraus

Alves-Leon

2012

Arq. Neuro-Psiquiatr.

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“…However, although there is no general consensus, PLEDs are currently considered an ictal pattern by some investigators 20 . As previously demonstrated 21,23,24 , PLEDs are consistently related to poorer neurological prognosis and to higher morbidity and mortality. In the present study, all patients who presented this ictal pattern at some time during the course of their disease died during the acute phase of refractory complex partial SE.…”

Section: Discussionmentioning

confidence: 56%

Refractory nonconvulsive status epilepticus in coma: analysis of the evolution of ictal patterns

Liberalesso

Garzón

Yacubian

et al. 2012

Arq. Neuro-Psiquiatr.

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OBJECTIVE: Nonconvulsive status epilepticus (NCSE) is currently considered as one of the most frequent types of status epilepticus (SE). The objective of the present study was to identify the natural history of the electrographical evolution of refractory NCSE and to establish the relationship between ictal patterns and prognosis. METHODS: We analyzed, retrospectively, 14 patients with loss of consciousness and NCSE. The ictal patterns were classified as discrete seizures (DS), merging seizures (MS), continuous ictal discharges (CID), continuous ictal discharges with flat periods (CID-F), and periodic lateralized epileptiform discharges (PLEDs). RESULTS: The ictal patterns were DS (n=7; 50.0%), PLEDs (n=3; 1.4%), CID (n=2; 14.3%), MS (n=1; 7.1%), and CID-F (n=1; 7.1%). CONCLUSIONS: NCSE electrographic findings are heterogeneous and do not follow a stereotyped sequence. PLEDs were related to a higher probability of neurological morbidity and mortality.

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“…Generalized periodic epileptiform discharge was reported first in patients with subacute sclerosing panencephalitis and Creutzfeldt-Jakob disease (15,16). GPED may result from thalamocortical pathway disruption associated with diffuse or multifocal cerebral dysfunction, or even in relation with systemic diseases (17).…”

Section: Discussionmentioning

confidence: 99%

Electroencephalographic Patterns Recorded by Continuous EEG Monitoring in Patients with Change of Consciousness in the Neurological Intensive Care Unit

Altindag

Okudan²,

Ozkan

et al. 2017

Arch Neuropsychiatr

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There is no consensus on the terminology for rhythmic and periodic patterns (RPP) detected by continuous electroencephalography (cEEG) monitoring of unconscious patients in the neurological intensive care unit (NICU) (1). The growth in cEEG utilization has led to an increase in the recognition of these EEG patterns of uncertain diagnostic and prognostic information. Furthermore, there is controversy regarding which electrographic patterns are associated with neuronal injury, which require treatment, and how aggressively to treat these patterns (2,3).We aimed to examine the frequency of some electroencephalographic patterns including periodic discharges (PD), repetitive spike waves (RSW), rhythmic delta activities (RDA), nonconvulsive seizures (NCS), and nonconvulsive status epilepticus (NCSE) recorded by cEEG in critically ill patients with a change of consciousness. This study was also aimed to detect clinical and laboratory correlates of these patterns. METHODSWe retrospectively identified all critically ill patients over the age of 18 years with a change of consciousness (Glasgow Coma Score [GCS] ≤14) who underwent cEEG monitoring in the NICU during two years. Clinical information was gathered from a review of inpatient medical notes, neuroimaging studies and reports, and discharge summaries. Baseline demographic data (age, gender), past medical history, duration of hospitalization in the NICU, clinical seizures at admission, in the emergency department, or during hospitalization prior to cEEG; treatment with continuous IV or intermittent antiepileptic drugs (AED) and other treatments such as antibiotics, sedatives and anesthetics, all radiology and laboratory findings were investigated. Premonitoring and postmonitoring scores including GCS, modified Rankin Scale score of the patients, and also National Institutes of Health Stroke Scale score for those with acute ischemic stroke

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Electroencephalogram in Subacute Progressive Encephalitis

Cited by 169 publications

References 0 publications

Periodic EEG patterns: importance of their recognition and clinical significance

Periodic EEG patterns: importance of their recognition and clinical significance

Refractory nonconvulsive status epilepticus in coma: analysis of the evolution of ictal patterns

Electroencephalographic Patterns Recorded by Continuous EEG Monitoring in Patients with Change of Consciousness in the Neurological Intensive Care Unit

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