Journal article
Features of Simultaneous Scalp and Intracranial EEG That Predict Localization of Ictal Onset Zone
Clinical EEG and neuroscience, Vol.49(3), pp.206-212
05/2018
DOI: 10.1177/1550059417738688
PMID: 29067832
Abstract
To assess the utility of simultaneous scalp EEG in patients with focal epilepsy undergoing intracranial EEG evaluation after a detailed presurgical testing, including an inpatient scalp video EEG evaluation.
Patients who underwent simultaneous scalp and intracranial EEG (SSIEEG) monitoring were classified into group 1 or 2 depending on whether the seizure onset zone was delineated or not. Seizures were analyzed using the following 3 EEG features at the onset of seizures latency, location, and pattern.
The criteria showed at least one of the following features when comparing SSIEEG: prolonged latency, absence of anatomical congruence, lack of concordance of EEG pattern in 11.11% (1/9) of the patients in group 1 and 75 % (3/4) of the patients in group 2. These 3 features were not present in any of the 5 patients who had Engel class I outcome compared with 1 of the 2 patients (50%) who had seizure recurrence after resective surgery. The mean latency of seizure onset in scalp EEG compared with intracranial EEG of patients in group 1 was 17.48 seconds (SD = 16.07) compared with 4.33 seconds (SD = 11.24) in group 2 ( P = .03). None of the seizures recorded in patients in group 1 had a discordant EEG pattern in SSIEEG.
Concordance in EEG features like latency, location, and EEG pattern, at the onset of seizures in SSIEEG is associated with a favorable outcome after epilepsy surgery in patients with intractable focal epilepsy.
Simultaneous scalp EEG complements intracranial EEG evaluation even after a detailed inpatient scalp video EEG evaluation and could be part of standard intracranial EEG studies in patients with intractable focal epilepsy.
Details
- Title: Subtitle
- Features of Simultaneous Scalp and Intracranial EEG That Predict Localization of Ictal Onset Zone
- Creators
- Sergiu Abramovici - Tel Aviv Sourasky Medical CenterArun Antony - University of Pittsburgh Medical CenterMaria Elizabeth Baldwin - University of Pittsburgh Medical CenterAlexandra Urban - University of Pittsburgh Medical CenterGena Ghearing - University of Pittsburgh Medical CenterJulie Pan - University of Pittsburgh Medical CenterTao Sun - University of PittsburghRobert Todd Krafty - University of PittsburghR Mark Richardson - 4 Department of Neurosurgery, University of Pittsburgh Medical Center, UPMC Presbyterian, Pittsburgh, PA, USA.Anto Bagic - University of Pittsburgh Medical Center
- Resource Type
- Journal article
- Publication Details
- Clinical EEG and neuroscience, Vol.49(3), pp.206-212
- DOI
- 10.1177/1550059417738688
- PMID
- 29067832
- ISSN
- 1550-0594
- eISSN
- 2169-5202
- Grant note
- DOI: 10.13039/100000002, name: National Institutes of Health, award: UL1-TR-001857
- Language
- English
- Date published
- 05/2018
- Academic Unit
- Neurology
- Record Identifier
- 9984303023102771
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