Bedside interpretation of simplified continuous EEG after cardiac arrest

Area of Science:

• Neuroscience
• Critical Care Medicine
• Clinical Neurophysiology

Background:

• Continuous electroencephalography (cEEG) monitoring is crucial for prognosis and seizure detection post-cardiac arrest.
• Implementation challenges include a shortage of EEG technicians and experts.
• Simplified cEEG interpretation by ICU physicians is explored to address these limitations.

Purpose of the Study:

• To evaluate the ability of ICU physicians to perform preliminary interpretations of simplified cEEG.
• To assess the accuracy of ICU physician interpretations compared to EEG experts in the post-cardiac arrest setting.

Main Methods:

• Five ICU physicians underwent one day of training in simplified cEEG interpretation.
• Physicians interpreted 71 simplified cEEG recordings from 37 comatose cardiac arrest survivors.
• Interpretations focused on EEG background patterns and epileptiform discharges, with an EEG expert as reference.

Main Results:

• Substantial agreement (κ=0.69) was found for EEG background patterns.
• Moderate agreement (κ=0.43) was observed for epileptiform discharges.
• Physician sensitivity for seizure detection was 50% with 87% specificity.

Conclusions:

• Preliminary bedside cEEG interpretations by trained ICU physicians can facilitate early detection of significant changes.
• This approach may prompt timely patient management adjustments and further expert evaluation.
• Awareness of simplified montage and interpretation limitations is crucial; expert cEEG evaluation should not be delayed.