Collateral Ability of the Circle of Willis in Patients With Unilateral Internal Carotid Artery Occlusion

Abstract

In patients with unilateral ICA occlusion, the presence of collateral flow via the posterior communicating artery in the circle of Willis is associated with a low prevalence of border zone infarcts. Asymptomatic patients with an ICA occlusion do not have an increased collateral function of the circle of Willis.