Theta and alpha activity changes in patients with vascular cognitive disorder following cognitive rehabilitation after coronary artery bypass grafting
DOI:
https://doi.org/10.33910/2687-1270-2024-5-4-345-356Keywords:
vascular cognitive disorder, cognitive training, EEG, theta rhythm, alpha rhythm, coronary artery bypass graftingAbstract
Disruption of cerebral circulation, caused by atherosclerosis or cardiac surgery, is often associated with cognitive disorders (CD). The identification and implementation of effective strategies for CD prevention require monitoring of neurophysiological changes that accompany rehabilitation. The study aimed to investigate the changes in theta and alpha brain activity in patients with and without vascular cognitive disorder (VCD) who underwent cognitive rehabilitation in the early postoperative period following coronary artery bypass grafting (CABG). The study involved 104 patients, 51 of whom participated in a combined multitasking training program during the early postoperative phase. A comparison group of 53 patients was also included. VCD symptoms were identified in patients from both groups prior to CABG using a modified version of the Montreal Cognitive Assessment (MoCA) test. Electroencephalographic (EEG) recordings were taken in a resting state with closed eyes, 3–5 days prior to CABG and at 11–12 days post-surgery. It was found that patients without VCD who underwent training exhibited no increase in theta activity after CABG compared to patients with VCD (p=0.017). In contrast, the control group demonstrated an increase in theta activity post-CABG, irrespective of the VCD status. These findings highlight the negative adverse impact of VCD on brain activity during cognitive rehabilitation. Further research is needed to explore the neurophysiological mechanisms underlying cognitive function recovery following cardiac surgery.
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