The Role of Intravascular EEG

Abstract

In presurgical evaluation of temporal lobe epilepsy, invasive methods of recording are necesary if noninvasive electroencephalography is not conclusive. We describe a technique for recording electroencephalographic activity via an endovascular approach. Recordings were performed with a Seeker-10 microguide.All recordings were compared with simultaneous scalp recording. This semi-invasive method of identifying epileptogenic areas can detect the epileptiform discharges without interferences; it is useful as a complement to invasive techniques such as foramen ovale or depth recording. Purpose 1) To evaluate the possibilities of electroencephalographic recording directly from the cerebral hemispheres, via an endovascular approach.2) To show the technical aspects of intravascular electroencephalography.3) We demonstrate the advantages and disadvantages of intravascular EEG with respect to deep implantation electrodes in which conventional recording is not conclusive.