EEG Insights on the Comatose Post-Arrest Patient
Following resuscitation from cardiac arrest, brain injury is common. Phenotyping brain injury requires a combination of clinical examination, neuroimaging, and electroencephalography (EEG). The latter provides both immediate and longitudinal assessment of brain function. EEG also sheds light on how cortical and subcortical structures interact in the comatose patient.
The existing paradigm uses EEG to assess epileptiform findings such as seizures and their response to treatment. Newer analytic methods such as suppression ratio and power spectra analyses may allow early differentiation of patients who will recover. Incorporating these tools into future studies will allow researchers to tailor interventions to specific phenotypes of brain injury. We will review how EEG is used in the comatose post arrest patient and explore how these novel approaches are being used now and their future application.