Untrasonic evaluation of cerebrovascular stenosis and vasomotor reactivity

Objective:To evaluate the relationship between dizziness and the stenosis of cerebrovascular,vascular motor reactivity(VMR).Methods:A total of 204 patients were divided into three groups according to the clinical symptoms,the extracranial segment of the cerebral arteries(ICA,VA) and intracranial arteries(ACA,MCA,PCA,V-BA) were observed when calm breathe and holding back breath(15 s) with CDFI and TCD.The velocity and vasomotor reactivity were analysed.Results:The stenosis of cerebrovascular was higher in vertigo than that of dizziness(P=0.021),the stenosis of V-BA was magnifant in vertigo(P=0.019).The vasoreactivity in vertigo and dizziness was significantly lower than that in controls(P=0.001,P=0.003).The vasoreactivity of vertigo was associated closely with intima-media thickness,age,blood glucose,systolic blood pressure.Conclusion:The stenosis of cerebral arteries is higher in vertigo patients than dizziness patients and the stenosis of V-BA is magnifant,the vasomotor reactivity of dizziness and vertigo patients is lower.The vasoreactivity of vertigo is associated closely with blood glucose,systolic blood pressure,intima-media thickness and age.