S. Andonova-Atanasova 1, D. Mintchev 1, M. Novakova 2, R. Georgiev 2
1 Department of Neurology, Second Clinic of Neurology,
2 Department of Radiology, University Hospital St Marina – Varna, Bulgaria

Objective: The aim of this study is to find the initial changes of brain hemodynamic using color duplex sonography and evoked potentials - brainstem auditory and visual by patients with asymptomatic ischemic disturbances of cerebral circulation.

Material and Methods: By 40 elderly individuals (mean age – 65,7 years) with asymptomatic ischemic disturbances of cerebral circulation – diagnosed with MRI of the brain, was measured a blood flow velocity (BFV) and cerebral vasomotor reactivity (CVR) in the vertebral arteries using color coded duplex sonography. MRI was done at the beginning of the study and at 24 months to measure the severity of white matter changes. Evoked potentials – brainstem auditory and visual were also performed and evaluated in dynamics. It was analysed the latency, configuration and amplitude of the waves.