The EEG of a patient with hepatic encephalopathy is most likely to show:

• A. Atypical spike and wave
• B. Burst suppression pattern
• C. FIRDA
• D. Generalized triphasic waves

Answer: (D)

The EEG of a patient with hepatic encephalopathy is most likely to show generalized triphasic waves. These are characterized by their distinct morphology, consisting of a negative-positive-negative sequence that appears at a frequency typically between 1-3 Hz. The presence of generalized triphasic waves is particularly associated with metabolic disturbances, including liver dysfunction leading to hepatic encephalopathy.

In hepatic encephalopathy, the brain is affected by toxins such as ammonia that accumulate due to the liver's inability to detoxify effectively. This leads to changes in the brain's electrical activity, which can manifest as these generalized triphasic waves throughout the EEG. They tend to be most pronounced during periods of altered consciousness and can indicate the severity of the encephalopathy.

Other patterns, although they can occur in various neurological conditions, are not specific to hepatic encephalopathy. For instance, atypical spike and wave might be seen in other seizure disorders, burst suppression patterns typically appear in coma or severe cerebral damage, and FIRDA (frontal intermittent rhythmic delta activity) can indicate frontal lobe dysfunction or metabolic issues, but is not unique to hepatic encephalopathy. Thus, generalized triphasic waves remain the hallmark EEG finding associated with this condition, reinforcing the correct