Hemodynamic changes of intracranial circulation in the patients with severe carotid stenosis and occlusion
XING Ying-qi,JIANG Xin-mei,LIU Ying,et al.(Department of Neurology,The First Hospital of Jilin University,Changchun 130021,China)
Objective To analyze hemodynamic changes of internal carotid artery severe stenosis and occlusion.Methods All 75 patients were confirmed by Duplex and 12 patients by digital subtraction angiography(DSA)and magnetic resonance angiography(MRA).Transcranial Doppler ultrasound(TCD)performed for all.Results(1)The velocity and pulsatility index(PI)of ipsilateral middle cerebral artery(MCA)to stenosis or occlusion was significantly lower than that of contralateral MCA.(2)The velocity of contralateral anterior cerebral artery(ACA)to stenosis or occlusion in patients of anterior communicating artery(ACoA)opening was increased and PI was reduced compared with that of no ACoA opening.(3)Low flow velocity and resistance wave form were detected when occlusion or severe stenosis occurred proximal to the origin of ophthalmic artery(OA).Low flow velocity and high resistance wave form were found when occlusion or severe stenosis occurred distal to the origin of OA.The PI of the former was significantly lower than the latter.(4)Supratrochlear artery blood flow velocity ipsilateral to stenosis or occlusion was not different compared with contralateral,and the PI was significantly lower than that of the latter.(5)There were 50.67%(38/75)with the opening of ACoA,52.00%(39/75)with the opening of posterior communicating artery(PCoA),and 75.44% with the opening of ophthalmic artery(OA).Conclusion To enhance the recognition of hemodynamic changes of intracranial circulation in the patients with severe carotid stenosis and occlusion can increase diagnosis accuracy of severe ICA stenosis or occlusion.
【CateGory Index】： R743