Extracranial Carotid & Intracranial Arterial Stenosis in Ischemic Stroke

Inclusion Criteria: * Carotid TIA (transient ischemic attack) it should, however, be focal and usually motor-sensory to implicate the carotid artery system or ischemic stroke involving carotid territory. * Asymptomatic patients with carotid stenosis or anterior circulation stenosis discovered accidentally during investigations for further risk factors. Exclusion Criteria: * Major functional impairment (Modified Rankin Scale \>/= 3) * Significant cognitive impairment. * Contraindication to acetylsalicylic or dual antiplatelet. * Renal dysfunction precluding safe contrast medium administration. * pregnancy or refusal. * Intracranial aneurysm or AVM. * Intra cerebral hemorrhage or hemorrhagic infarction.