[Electric brain activity in patients with simultaneous coronary artery bypass grafting and carotid endarterectomy]

To analyze the postoperative electroencephalography (EEG) power changes in patients after simultaneous coronary artery bypass grafting (CABG) and a left- or right-sided carotid endarterectomy (CEE).

Forty-four patients with indications for surgical myocardial revascularization, including 24 patients with indications for CEE, were studied. Patients after simultaneous coronary and carotid surgery were divided into groups depending on the side of CEE: the left+CEE CABG group included 14 patients, the right CEE+CABG group included 10 patients. The group of isolated CABG consisted of 20 patients. The resting-state EEG with closed eyes was recorded before and at the 7-10th day after surgery. The changes of the spectral power (μV²/Hz), theta1 (4-6 Hz), theta2 (6-8 Hz), alpha1 (8-10 Hz), alpha2 (10-13 Hz) rhythms were analyzed, the hemispheric asymmetry (HA) coefficient of the rhythms was calculated.

In the early postoperative period, the power of theta1 and theta2 rhythms increased compared to the preoperative level regardless of the type of cardiosurgical intervention. A local character of postoperative theta activity changes was revealed in the left+CEE CABG group, whereas the most pronounced decrease of the alpha-rhythm HA coefficient was observed in the right CEE+CABG group at the 7-10th day after surgery in comparison to the preoperative level. The results of the study suggest that the simultaneous coronary and carotid surgery does not significantly exacerbate the severity of brain damage compared to isolated CABG.