Evoked brain potentials in patients with chronic vertebrobasilar ischaemia depending on the features of cerebral and regional perfusion





chronic brain ischaemia, vertebrobasilar territory, cognitive disorders, brain evoked potentials, ultrasound duplex scanning


Objective. To evaluate the effectiveness of brain evoked potentials for the objectivization of early cognitive disorders (CD) induced by cerebral and regional hypoperfusion.

Materials and methods. The influence of hypoperfusion in vertebrobasilar territory (VBT) on characteristics of cognitive functions in 52 patients with chronic brain ischemia was studied. The following methods were used: clinico-neurological, MRI, SPECT, duplex ultrasound scanning (DUS), EEG, and brain evoked potentials (EP).

Results. The patients were split into two groups by DUS scan findings: 1 – those having structural lesions in vertebral arteries (VA), and haemodynamically significant disorders in VBT and 2 – those having none. The examination of patients of the 1st group showed the following findings: high frequency of blood flow velocity decrease in VA; the tendency of decreasing in volumetric cerebral blood flow in brain segments and hemispheres according to SPECT data; prevalence of ataxia, coordination and long tract signs; high frequency of early CD in the domains of attention and memory; EP index changes. The patients with blood flow decompensation in VBT (according to DUS findings) showed changes in brainstem auditory EP parameters (BAEP): increase of III, IV, V latency peaks and III-V interpeak interval. According to the cognitive EP (CEP) study, the patients of the 1st group consistently demonstrated higher frequency of N2 peak amplitude decrease, and P300 peak latency increase.

Conclusions. Based on DUS scan findings, it is clinically appropriate to distinguish a group of patients with structural and haemodynamically significant disorders in VA. The deviations from the normal indices of CEP and BAEP correlate with CD occurring as a result of cerebral and regional hypoperfusion in VBT.

Author Biographies

Lidia L. Chebotariova, Romodanov Neurosurgery Institute, Kyiv

Department of Functional Diagnostics

Marina V. Globa, Romodanov Neurosurgery Institute, Kyiv

Department of Functional Diagnostics

Albina I. Tretiakova, Romodanov Neurosurgery Institute, Kyiv

Department of Functional Diagnostics

Sergey S. Makeev, Romodanov Neurosurgery Institute, Kyiv

Department of Radionuclide Diagnosis

Ludmila N. Suliy, Romodanov Neurosurgery Institute, Kyiv

Department of Functional Diagnostics

Alexandr S. Solonovych, Romodanov Neurosurgery Institute, Kyiv

Department of Functional Diagnostics

Nikolay A. Nikolov, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv

Electronic Engineering Department

Tatiana G. Novikova, Romodanov Neurosurgery Institute, Kyiv

Department of Radionuclide Diagnosis


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How to Cite

Chebotariova, L. L., Globa, M. V., Tretiakova, A. I., Makeev, S. S., Suliy, L. N., Solonovych, A. S., Nikolov, N. A., & Novikova, T. G. (2018). Evoked brain potentials in patients with chronic vertebrobasilar ischaemia depending on the features of cerebral and regional perfusion. Ukrainian Neurosurgical Journal, (2), 61–68. https://doi.org/10.25305/unj.128855



Original articles