The relationship between the clinical picture of ischemic stroke and magnetic resonance imaging in assessing changes in the brain substance and cerebral hemodynamics was studied. It was stated that changes in the venous circulation of the brain are detected on magnetic resonance imaging and magnetic resonance angiography and show a stable reliable regular relationship with various states of the brain and carry important information about the organization of its blood supply and identification of the degree and severity of vascular damage to the brain.