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[Relation between neurologic damage and collateral circulation detected by Doppler CW in occlusive pathology of the internal carotid].

76 patients affected by acute ischemic encephalopathy due to i.c.a. occlusion have been examined through a Doppler nosography, in order to evaluate the influence of the type of collateral circle on the neurologic damage. Collateral circles between the external and internal carotid arteries were established through the ophthalmic artery in 80% of cases (A) and through the Willis circle in 70% of cases (B). Those two types of compensation do not seem to have prognostic value with regard to disability; on the contrary a remarkable difference was observed in the type of pathology (A = Stroke 40%, RIA 60%; B = 77%, RIA 23%).

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