Assessment Of Collateral Pathways In Acute Ischemic Cerebrovascular Stroke Using A Mansour Grading Scale; A New Scale, A Pilot Study

Objective: The purpose of this study was to assess collateral pathways in acute ischemic stroke using a new grading scale (Mansour Scale) and correlating the findings with different risk factors, clinical outcome and recanalization rate with endovascular management. Cerebral collateral circulation is an indirect pathway for restoration of blood flow to ischemic areas in case of obstruction of their primary blood supply. Assessment of cerebral collaterals is of utmost importance in the setting of acute stroke as it carries diagnostic, therapeutic and prognostic values. Our study aimed at assessing collaterals in acute ischemic stroke using a new grading scale (Mansour Scale) developed in our department and correlating the angiographic findings with different stroke risk factors and with clinical outcome. The new scale assesses collaterals regarding their type, pattern, site of occlusion, robustness and functionality and outcome is assessed using NIHSS scale. Conclusion: We concluded that better collateralization by our new scale is associated with better recanalization and better clinical outcome. We found no effect of different stroke risk factors studied on collateral development.