Document Detail

Triphasic waves during post-ictal stupor.
MedLine Citation:
PMID:  8862844     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The term, "triphasic wave" originally described an EEG pattern believed to be a marker for a specific stage of hepatic coma. For 4 decades, the diagnostic and prognostic specificity of the pattern remains controversial. Its pathophysiology also continues to be elusive. METHODS: EEG recordings were obtained in three patients known or suspected to have primary generalized epilepsy. In 2 patients, the EEGs were part of long-term monitoring using simultaneous video-EEG telemetry. For the third patient, the EEG was secured only during the post-ictal unconsciousness. These 3 patients were specifically selected because of the presence of triphasic waves in their EEGs. RESULTS: Triphasic waves were observed in the EEG of the 3 patients only during post-ictal unconsciousness. The pattern was transient, being preceded by generalized suppression and delta slow waves and followed by theta activities. Alpha rhythms supervened when the patients became fully alert. CONCLUSION: A post-ictal state should be considered in unconscious patients with triphasic EEG waves.
A Ogunyemi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques     Volume:  23     ISSN:  0317-1671     ISO Abbreviation:  Can J Neurol Sci     Publication Date:  1996 Aug 
Date Detail:
Created Date:  1997-01-06     Completed Date:  1997-01-06     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0415227     Medline TA:  Can J Neurol Sci     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  208-12     Citation Subset:  IM    
Division of Neurology, Memorial University, St. John's, Newfoundland, Canada.
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MeSH Terms
Arm / physiopathology*
Hepatic Encephalopathy / physiopathology*
Monitoring, Physiologic

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