Recently, Boniface and Antoun1reported endovascular EEG during intra-arterial amobarbital tests using an endovascular guide wire as the different electrode for bipolar recordings against an extracranial surface electrode (T3) or an average reference. They concluded that their technique was feasible to identify intracranial epileptiform discharges and was less invasive than other intracranial EEG methods with the advantage that it was possible to move the guide wire between different intracranial sides. They also mentioned “the potential to …