Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

The diagnostic specificity of triphasic wave patterns.

B J Fisch1, D W Klass

  • 1Clinical Neurophysiology Laboratories, Columbia College of Physicians and Surgeons, New York, NY 10032.

Electroencephalography and Clinical Neurophysiology
|July 1, 1988
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ictal onset slow potential shifts recorded with hippocampal depth electrodes.

Neurology & clinical neurophysiology : NCN·2006
Same author

Common medical terminology comes of age, Part One: Standard language improves healthcare quality.

Journal of healthcare information management : JHIM·2001
Same author

Common medical terminology comes of age, Part Two: Current code and terminology sets--strengths and weaknesses.

Journal of healthcare information management : JHIM·2001
Same author

The effect of vagus nerve stimulation on epileptiform activity recorded from hippocampal depth electrodes.

Epilepsia·2001
Same author

Postictal EEG suppression and hippocampal atrophy in temporal lobe epilepsy.

Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society·2001
Same author

Defective alpha reactivity with mental concentration.

Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society·1998
Same journal

Coming to terms with brain waves.

Electroencephalography and clinical neurophysiology·2014
Same journal

Habituation of lower leg stretch responses in Parkinson's disease.

Electroencephalography and clinical neurophysiology·2000
Same journal

Asymmetry of cortical excitability revealed by transcranial stimulation in a patient with focal motor epilepsy and cortical myoclonus.

Electroencephalography and clinical neurophysiology·2000
Same journal

Evoked isometric muscle contractions in myopathies: analysis of pathophysiological properties by different stimulus patterns.

Electroencephalography and clinical neurophysiology·2000
Same journal

Task-related coherence and task-related spectral power changes during sequential finger movements.

Electroencephalography and clinical neurophysiology·2000
Same journal

Electrophysiological studies in mild idiopathic carpal tunnel syndrome.

Electroencephalography and clinical neurophysiology·2000
See all related articles

Severe background slowing on electroencephalograms (EEGs) is linked to hepatic encephalopathy. However, other EEG features do not reliably distinguish it from other metabolic encephalopathies.

Area of Science:

  • Neurology
  • Clinical Neurophysiology

Background:

  • Electroencephalography (EEG) is crucial for diagnosing encephalopathies.
  • Triphasic waves are a common EEG finding in metabolic encephalopathies, including hepatic encephalopathy.
  • The diagnostic specificity of individual EEG features for hepatic encephalopathy requires further clarification.

Purpose of the Study:

  • To determine the diagnostic specificity of individual electrographic features in EEGs with triphasic wave patterns.
  • To assess whether specific EEG characteristics can reliably differentiate hepatic encephalopathy from other metabolic encephalopathies.

Main Methods:

  • A blind analysis of 56 EEGs exhibiting triphasic wave patterns was conducted.
  • EEG variables analyzed included topography, phase lags, symmetry, background activity, reactivity, phase reversal sites, and response to photic stimulation.

Related Experiment Videos

  • Clinical data, including mental status, were correlated with EEG findings.

    • Main Results:

    • Severe background slowing was the only statistically significant EEG finding associated with hepatic encephalopathy (P < 0.001).
    • No other analyzed EEG features demonstrated a characteristic pattern for hepatic encephalopathy.
    • The studied EEG features did not reliably distinguish hepatic encephalopathy from other metabolic encephalopathies.

    Conclusions:

    • Severe background slowing is a significant EEG correlate of hepatic encephalopathy.
    • Individual EEG features, beyond background slowing, lack the specificity to differentiate hepatic encephalopathy from other metabolic encephalopathies.
    • Further research may be needed to identify more specific EEG biomarkers for hepatic encephalopathy.