Spectral versus visual EEG analysis in mild hepatic encephalopathy

Amodio, Piero; Marchetti, P.; Piccolo, F. Del; Tourtchaninoff, Marianne de; Varghese, P.; Zuliani, Claudio; Campo, Giovanni; Gatta, Angelo; Guérit, Jean‐Michel

doi:10.1016/s1388-2457(99)00076-0

Cited by 159 publications

(122 citation statements)

References 23 publications

Supporting

Mentioning

120

Contrasting

Unclassified

Order By: Relevance

“…However, as a rule, beta activity decreases in more severe HE. 7 Notably, already about fifty years ago a decrease in the EEG amplitude with replacement of alpha by beta rhythms was reported as a feature of the very initial phases of HE. 2 Such observation was neglected in subsequent studies, because a low-voltage desynchronized EEG dominated by beta activity can represent a genetic feature and also the expression of anxiety or alcohol misuse.…”

Section: The Eegmentioning

confidence: 99%

“…This is clearly captured by quantitative EEG, which does not detect a reduction in the mean dominant frequency (MDF) of the EEG in, but only an increase of theta activity in the posterior areas of the scalp. 7,[13][14][15] The MDF is a measure of the overall frequency of an EEG interval (called epoch) and, on the computational point of view, is the mean power of each frequency weighted by the frequency rate, according to the formula:…”

Section: The Typical Eeg Findings In Hementioning

confidence: 99%

“…7,10 Grading based on the simple semiquantitative evaluation of the frequency of the background principal EEG rhythm improves repeatability. 10 Spectral Table 1 EEG Changes in HE.…”

Section: Quantitative Eegmentioning

confidence: 99%

See 2 more Smart Citations

Clinical Neurophysiology of Hepatic Encephalopathy

Amodio

Montagnese

2015

Journal of Clinical and Experimental Hepatology

View full text Add to dashboard Cite

Background/Objectives: Hepatic encephalopathy (HE) has relevant impact on the quality of life of patients and their caregivers and causes relevant costs because of hospitalizations and work days lost. Its quantification is important to perform adequate clinical trials on this relevant complication of cirrhosis and portal-systemic shunting. Clinical neurophysiology, which detects functional alterations of the nervous system, has been applied to the study of HE for over 60 years. This review aims at summarizing and clarifying the role of neurophysiologic techniques in the study of HE. Methods: A narrative review was performed aiming at interpreting the cited papers and the techniques on the basis of their physiological and pathophysiological meaning. Results: The potential role of EEG, quantified EEG, evoked potentials-both exogenous, endogenous and motor-have been clarified to the reader that may be unfamiliar with neurophysiology. Conclusions: The EEG, reflecting the oscillatory changes of neural network is the preferable tool to detect and monitor HE, with the exception of its most severe stage, when EEG flattens. SSEP and MEP have indication to detect and monitor transmission alterations that are likely related to myelin changes and microedema. ( J CLIN EXP HEPATOL 2014;5:S60-S68)

show abstract

Section: The Eegmentioning

confidence: 99%

Section: The Typical Eeg Findings In Hementioning

confidence: 99%

See 1 more Smart Citation

Clinical Neurophysiology of Hepatic Encephalopathy

Amodio

Montagnese

2015

Journal of Clinical and Experimental Hepatology

View full text Add to dashboard Cite

show abstract

“…Thus, only one emergency EEG result was analyzed for each patient. The following findings were standardized according to the modified criteria of Husain 3 : 1) intermittent rhythmic delta activity (IRDA); 2) critical activity epileptiform according to Treiman et al 19 with modifications by Garzon et al 20 ; 3) normal; 4) burst-suppression; 5) continuous high-voltage delta activity according to Amodio et al 7 ; 6) low-voltage, slow, nonreactive EEG of less than 10 mV; 7) diffuse periodic epileptiform disorder (PED) and lateralized (PLED); 8) coma with specific rhythms (alpha, theta and spindle); 9) electrocerebral inactivity (according to the minimum technical requirements proposed by the American Clinical Neurophysiology Society and 10) intercritical epileptiform disorder. The data were obtained and stored in an Excel spreadsheet.…”

Section: Methodsmentioning

confidence: 99%

“…The different patterns of EEG obtained in emergency patients, although nonspecific, can often be correlated with the etiology of diseases of the central nervous system such as trauma 4 , vascular injury and anoxic-ischemic injury due to cardiorespiratory arrest 5 . In hepatic encephalopathy 6,7 , Creutzfeldt-Jakob disease 8 , non-convulsive status epilepticus [9][10][11][12][13][14][15] and herpes simplex encephalitis 16 , EEG is decisive for diagnosis and thus guides therapy and gives an indication of the prognosis.…”

mentioning

confidence: 99%

Emergency EEG: study of survival

Borges

Botós

Bastos

et al. 2010

Arq. Neuro-Psiquiatr.

View full text Add to dashboard Cite

Objective: To determine the survival rate according to the main findings of emergency electroencephalography (EEGs) of patients treated in a tertiary hospital. Method: In this prospective study, the findings of consecutive emergency EEGs performed on inpatients in Hospital de Base in São José do Rio Preto, Brazil were correlated with survival utilizing KaplanMeyer survival curves. results: A total of 681 patients with an average age of 42 years old (1 day to 96 years) were evaluated, of which 406 were male. The main reasons for EEGs were epileptic seizures (221 cases), hepatic encephalopathy [116 cases of which 85 (73.3%) were men, p-value=0.001], status epilepticus (104 cases) and impaired consciousness (78 cases). The underlying disease was confirmed in 578 (84.3%) cases with 119 (17.5%) having liver disease [91 (76.0%) were men, p-value=0.001], 105 (15.4%) suffering strokes, 67 (9.9%) having metabolic disorders, 51 (7.5%) central nervous system infections and 49 (7.2%) epilepsy. In the three months following EEG, a survival rate of 75% was found in patients with normal, discreet slow activity or intermittent rhythmic delta activity EEGs, of 50% for those with continuous delta activity and generalized epileptiform discharges, and of 25% for those with burst-suppression, diffuse depression, and in alpha/theta-pattern coma. Death was pronounced immediately in patients with isoelectric EEGs. conclusion: The main findings of EEGs, differentiated different survival rates and are thus a good prognostic tool for patients examined in emergencies. Key words: EEG, emergency, prognosis, probability of survival.EEG de urgência: taxa de sobrevivência rEsuMO Objetivo: Determinar a taxa de sobrevivência (TS), segundo os principais achados de eletrencefalograma de urgência (E-EEG), dos pacientes atendidos nas emergências de hospital de alta complexidade. Método: Estudo prospectivo, por ordem de chegada, da correlação entre os achados de E-EEG, feitos nos pacientes à beira do leito, com TS, utilizando-se as curvas de sobrevidas de Kaplan Meyer no Hospital de Base de São José do Rio Preto, São Paulo/Brasil. resultados: Foram estudados 681 pacientes, dos quais 406 (59,6%) masculinos, com idade média de 42 anos (1 dia a 96 anos). As principais motivações para o E-EEG foram crises epilépticas (221 casos), encefalopatia hepática [(116 casos, dos quais 85 masculinos (73,3%), p= 0,001]; estado de mal epiléptico 104 e rebaixamento de consciência 78. O diagnóstico da doença de base foi confirmado em 578 (84,3%), sendo 119 (17,5%) hepatopatia, dos quais 91 (76,%) masculinos, p= 0,001; 105 (15,4%) acidente vascular encefálico; 67 (9,9%) distúrbio metabólico; 51 (7,5%) infecção do sistema nervoso central e 49 (7,2%) epilepsia. TS de 75% nos três primeiros meses foi encontrada nos pacientes com

show abstract

Hepatic encephalopathy

Amodio¹

2015

Cirrhosis: A Practical Guide to Management

View full text Add to dashboard Cite

Spectral versus visual EEG analysis in mild hepatic encephalopathy

Cited by 159 publications

References 23 publications

Clinical Neurophysiology of Hepatic Encephalopathy

Clinical Neurophysiology of Hepatic Encephalopathy

Emergency EEG: study of survival

Hepatic encephalopathy

Contact Info

Product

Resources

About