Using electroencephalogram and transcranial Doppler ultrasound to predict delayed cerebral ischemia


  • 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.