颈动脉闭塞不能作动脉内膜切除时,现风行作颅内外动脉吻合术来解除反复发作的同侧脑缺血。但不少病人虽术后吻合通畅,仍无好转。故对此类手术适应症或进行其他手术方法都应力求弄清每个病人缺血反复发作的机制在血管造影所见的各种闭 Carotid artery occlusion can not be used for endarterectomy, the prevalence of intracranial and external artery anastomosis to relieve recurrent ipsilateral cerebral ischemia. However, although many patients with anastomotic patency, still no improvement. Therefore, such indications for surgery or other surgical methods should seek to clarify the mechanism of recurrent ischemia in each patient in angiography seen in a variety of closed