Risk factors of the establishment of collateral circulation with symptomatic carotid artery system stenosis or occlusion

Objective To explore the risk factors of the establishment of collateral circulation with symptomatic carotid artery system stenosis or occlusion. Methods The clinical data of 288 patients with symptomatic carotid artery system severe stenosis or occlusion were collected,and the risk factors were analyzed. Results One hundred and sixty-six patients had collateral circulation( collateral circulation group),and 122 patients had no collateral circulation( no collateral circulation group). Compared with no collateral circulation group,the rate of hypertension in collateral circulation group was significantly increased,and systolic pressure was significantly decreased( all P 0. 05). Binary Logistic regression analysis with collateral circulation as dependent variable revealed that there was no significant difference of hypertension among the different lesion segments with collateral circulation( χ2= 1. 331,P = 0. 514),and there were no significant difference of hypertension between the primary and secondary collateral circulation( χ2= 0. 306,P = 0. 580). Conclusion Hypertension may play a promotive role for the establishment of the collateral circulation with symptomatic carotid artery system stenosis or occlusion.