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The assessment of routine electroencephalography in patients with altered mental status.

Authors
 Kwon Duk Seo  ;  Young-Chul Choi  ;  Won-Joo Kim 
Citation
 YONSEI MEDICAL JOURNAL, Vol.52(6) : 933-938, 2011 
Journal Title
YONSEI MEDICAL JOURNAL
ISSN
 0513-5796 
Issue Date
2011
MeSH
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Electroencephalography/methods* ; Epilepsy, Generalized/diagnosis* ; Female ; Glasgow Coma Scale ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Young Adult
Keywords
Electroencephalography ; prognosis ; NCSE
Abstract
PURPOSE: Changes in electroencephalography (EEG) patterns may offer a clue to the cause of altered mental status and suggest the prognoses of patients with such mental status. We aimed to identify the EEG patterns in patients with altered mental status and to correlate EEG findings with clinical prognoses.

MATERIALS AND METHODS: We included 105 patients with altered mental status who underwent EEG. EEG and clinical chart reviews with ongoing patient follow-ups were performed to determine the clinical prognosis of the patients. Clinical data were sorted using the Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS). EEG findings were classified according to a method suggested by Scollo-Lavizzari. The EEGs were analyzed to find out whether any correlation existed with the prognoses of patients. Results: Nonconvulsive status epilepticus (NCSE) was detected in only three patients (2.9%). Specific EEG patterns were observed in 28 patients. Twenty-nine (27.6%) patients expired, and 45 (42.9%) patients were in a vegetative state. EEG grade and GCS significantly correlated with GOS. EEG grade alone had a correlation with GCS. Patients with a severe EEG finding had a poor prognosis.

CONCLUSION: EEG findings reflect the mental status of patients, and EEG grades are correlated with the clinical prognosis of patients. Although EEG is not frequently performed on patients with altered mental state, it can play a supplemental role in establishing a prognosis. Thus, the use of EEG should be emphasized in clinical setting.
Files in This Item:
T201103481.pdf Download
DOI
10.3349/ymj.2011.52.6.933
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurology (신경과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Won Joo(김원주) ORCID logo https://orcid.org/0000-0002-5850-010X
Choi, Young Chul(최영철) ORCID logo https://orcid.org/0000-0001-5525-6861
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/94381
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