The relationship between ischemic stroke and collateral circulation

Objective:To study the relationship between compensation by collateral circulation and the quantity of ischemic stroke location.Methods:35 cases of ischemic stroke were retrospectively analyzed.MRI and DSA were performed in all cases,at least one cerebral artery occlusion was found in each patient by DSA,compared the relationship between quantity of Willis circle opening and quantity of ischemic stroke location by SPSS 11.5 statistical software.Results:Of the 35 cases,45 arterial occlusions were found.DSA findings demonstrated internal carotid artery occlusion in 23 cases,vertebral artery-basilar artery occlusion in 22 cases.13 cases of single ischemic stroke location and 4 cases of multiple ischemic stroke locations were found in 17 cases Willis circle opening;11 cases of single ischemic stroke location and 17 cases of multiple ischemic stroke locations were found in 28 cases Willis circle unopening.Conclusion:Intact Willis circle is favorable for collateral circulation establishment when cerebral artery occlusion takes place,Willis circle opening can significantly decrease ischemic stroke location quantity when cerebral artery occlusion is found in this study.