What is the prevalence of EEG triphasic waves?

Updated: Sep 24, 2018
  • Author: Kalyani Korabathina, MD; Chief Editor: Tarakad S Ramachandran, MBBS, MBA, MPH, FAAN, FACP, FAHA, FRCP, FRCPC, FRS, LRCP, MRCP, MRCS  more...
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A population-based evaluation of TWE has not been completed, but of 5000 patients at the University of Pennsylvania who underwent an EEG, TWs were identified as the dominant abnormality in 42. Of 15,326 EEGs of inpatients at a large psychiatric institute, 83 demonstrated TWs. TWs occur in approximately 25% of patients with hepatic encephalopathy and in more than 10% of patients with septic encephalopathy. The criteria used to define TWs can vary, and this affects its reported frequency.

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