Together with clinical markers, the combination of electroencephalogram (EEG) and transcranial Doppler ultrasounds (TCD) improves the prediction of delayed cerebral ischemia (DCI) after subarachnoid hemorrhage (SAH).
Why this matters
DCI is a significant complication of SAH, previously thought to be caused by large vessel vasospasm. As such, despite being operator-dependent and being affected by other physiological parameters, TCD is the standard of care for DCI monitoring.
There has been some evidence that continual EEG changes occur prior to developing DCI and is more strongly associated with DCI than TCD velocities; therefore, together these two measures may offer synergistic information about DCI risk.