What is the role of EEG in the workup of rabies?

Updated: Jun 21, 2019
  • Author: Sandra G Gompf, MD, FACP, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Electroencephalography (EEG) findings include encephalopathic changes. Due to generalized vasospasm of cerebral arteries during the first week of illness, EEG amplitude may drop precipitously and mimic brain death. This may be further suggested by papillary reflex abnormalities such as anisocoria or fixed pupils due to dysautonomia. These findings may reverse with return of blood flow. A more reliable means of determining brain death in the case of rabies may therefore be cerebral arterial flow scanning that demonstrates absent flow. Brain biopsy is another option. [30, 31, 32, 33]


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