title: [Evidence of cerebral involvement in the chronic stage of Chagas disease obtained using the P300 potential and quantified electroencephalography].
abstract: It is already known the involvement of the peripheral nervous system in chronic stages of Chagas disease. Tomographic and neuropsychological evidence of brain compromise has been included recently. In order to evaluate the neurophysiological counterpart of cerebral involvement, we studied P300 evoked potential and quantified EEG (qEEG) of 35 patients (26-55 years), and compared to an equal number of control subjects (29-55 years). We have found increased P300 latency compared to the control group (331.24 +/- 24. 02 vs 318.86 +/- 23.18) (p=0.01716). qEEG showed lower relative Beta 1 power in the patients group (p=1.6E5), and the principal frequency 1 Hz slower in the same group (p=0.01077). Multivariate analysis showed three subpopulations: a normal one, pathological one with higher Alpha power and pathological with Alpha decrement and DeltaTheta increment. Pathological findings represented 20% for the qEEG and 11.43% for cognitive potentials. Cardiac and neurologic involvement were not correlated. We conclude that there is clear electrophysiological evidence of cerebral involvement in chronic Chagas disease, thus reinforcing findings obtained by other methods.
authors.affiliation: Servicio de Neurología, Sección de Neurofisiología, Hospital Bernardino Rivadavia, Buenos Aires, Argentina. hrsneu@intramed.net.ar
authors.forename: J O
authors.initials: JO
authors.lastname: Prost
authors.forename: H
authors.initials: H
authors.lastname: Romero Villanueva
authors.forename: A M
authors.initials: AM
authors.lastname: Morikone
authors.forename: G
authors.initials: G
authors.lastname: Polo
authors.forename: A M
authors.initials: AM
authors.lastname: Bosch
mesh_terms: D000328:Adult; D001927:Brain Diseases / Q000503:physiopathology*; D016022:Case-Control Studies; D002540:Cerebral Cortex / Q000503:physiopathology*; D002598:Chagas Cardiomyopathy / Q000150:complications / Q000503:physiopathology; D014355:Chagas Disease / Q000503:physiopathology*; D002908:Chronic Disease; D004569:Electroencephalography / Q000379:methods; D004594:Electrophysiology; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D018709:Statistics, Nonparametric
vernacular_title: Evidencias de compromiso cerebral en el estadio crónico de la enfermedad de Chagas obtenidas por medio del potencial P300 y de electroencefalografía cuantificada.