This study attempts to improve surgical treatment outcomes among people with chronic carotid artery occlusive disease by conducting a comprehensive review of neuroradiological, clinical, and cognitive data. The evaluation involves an extensive angiographic analysis, including pre- and postoperative measurements of superficial temporal artery branch diameters, assessment of the Circle of Willis and collateral pathways, alongside cerebral perfusion metrics, cognitive status, and clinical outcomes. Major focus is directed towards evaluating the degree of intracranial revascularization following to extracranial-intracranial bypass by postoperative angiographic evaluations. This integrative strategy aims to refine surgical reasons, better predictions of functional and cognitive outcomes, minimize postoperative risks, and eventually improve the overall efficacy of treatment in this patient population.