["Logic" and doubts in the surgery of associated carotid and vertebral lesions].

Combined vertebral artery and carotid artery surgery may be performed in patients with proximal subclavian or vertebral artery stenosis provided that general anesthesia is not contraindicated? Others indications may be considered in patients with proved arterial thrombo-embolism or in patients for whom arteriography, cerebral angioscintigraphy and ultrasound velocimetry enable the physician to suspect a cerebral low flow and the lack of collateral pathways between the posterior and anterior cerebral system.