title: Quantitative EEG evaluation in patients with acute encephalopathy.
abstract: OBJECTIVE
  To investigate the use of quantitative EEG (qEEG) in patients with acute encephalopathies (AEs) and EEG background abnormalities.
  
  
  METHODS
  Patients were divided into favorable outcome (group A, 43 patients) and an unfavorable outcome (group B, 5 patients). EEGLAB software was used for the qEEG analysis. A graphic of the spectral power from all channels was generated for each participant. Statistical comparisons between the groups were performed.
  
  
  RESULTS
  In group A, spectral analysis revealed spectral peaks (theta and alpha frequency bands) in 84% (38/45) of the patients. In group B, a spectral peak in the delta frequency range was detected in one patient. The remainder of the patients in both groups did not present spectral peaks. Statistical analysis showed lower frequencies recorded from the posterior electrodes in group B patients.
  
  
  CONCLUSIONS
  qEEG may be useful in the evaluations of patients with AEs by assisting with the prognostic determination.
authors.forename: Aline Souza Marques da Silva
authors.initials: AS
authors.lastname: Braga
authors.forename: Bruno Della Ripa Rodrigues
authors.initials: BD
authors.lastname: Assis
authors.forename: Jamil Thiago Rosa
authors.initials: JT
authors.lastname: Ribeiro
authors.forename: Patrícia Maria Sales
authors.initials: PM
authors.lastname: Polla
authors.forename: Breno José Hulle
authors.initials: BJ
authors.lastname: Pereira
authors.forename: Ronaldo Guimarães
authors.initials: RG
authors.lastname: Fonseca
authors.forename: Luiz Eduardo
authors.initials: LE
authors.lastname: Betting
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001927:Brain Diseases / Q000401:mortality* / Q000503:physiopathology; D004569:Electroencephalography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D055815:Young Adult