State of cerebral hemodynamics in patients with syndrome of vertebro-basilar insufficiency

The state of venous and arterial cerebral hemodynamics was studied using ul trasonic dopplerography with application of hypo- and hypercapnia, angioenc ephaloscintigraphy with pertecnetate Tc-99m in 48 patients with syndrome of vertebrobasilar insufficiency. Estimation was performed in patients by the results of neurological and otoneurologic evidence, the data of nistagmogr aphy and registration of the truncal evoked potentials. It was found that a t early stages of the development of vertebrobasilar insufficiency's syndro me disorders of vasomotor reactivity and disturbances in venous hemodynamic s play a leading role in its pathogenesis. Stenosis damages of extra- and i ntracranial arteries become dominating in subsequent clinical picture.