中文摘要：

目的探讨血管内介入再通颅内大动脉慢性闭塞的可行性和安全性。方法回顾性分析2009年1月至2017年1月首都医科大学宣武医院神经外科血管内介入再通的15例颅内大动脉慢性闭塞患者的临床和影像学资料。12例为椎动脉V4段闭塞,3例为颈内动脉颅内段闭塞。术前采用全脑DSA评估闭塞长度和位置,用高分辨率MRI评估闭塞性质和再通可行性;术中双侧股动脉置鞘13例,一侧用于再通置入支架,另一侧通过侧支循环代偿充盈闭塞动脉远端作为参考路径图,增加再通可行性。术后根据脑梗死溶栓（TICI）分级系统评估再通后的顺向血流,定义≥2b级为血管成功再通。结果 15例患者首次症状发作到再通时间中位数为50（18-365）d。再通成功13例,2例椎动脉颅内段再通失败。13例再通成功患者中,12例再通后复查造影正向血流恢复至TICI 3级,1例TICI 2b级;7例症状好转,4例症状无变化,1例术后出现短暂性脑缺血发作、1例出现卒中。11例患者随访中位数时间39（3-89）个月后,改良Rankin量表评分中位数为1（0-2）分。结论颅内大动脉慢性闭塞再通,术前采用高分辨率MRI评估以及术中双侧置鞘技术,可能会增加开通率和降低围手术期并发症。

英文摘要：

Objective To investigate the feasibility and safety of endovascular recanalization of chronic occlusion of large intracranial artery.Methods From January 2009 to January 2017,the clinical and imaging data of 15 patients with chronic occlusion of large intracranial artery admitted to the Department of Interventional Neuroradiology,Xuanwu Hospital,Capital Medical University for endovascular recanalization were analyzed retrospectively.Twelve patients were V4 segment occlusion of vertebral artery and 3 were internal carotid artery occlusion.Preoperative whole brain digital subtraction angiography （DSA） was used to assess the occlusion length and location.High-resolution magnetic resonance imaging （MRI） was used to evaluate the nature of occlusion and the feasibility of recanalization.The intraoperative bilateral femoral artery sheath placement was conducted in 13 cases,one side was used for recanalization and stenting,and the other side was compensated by filling the distal occlusion of the artery through collateral circulation as the reference path map,and increased the feasibility of recanalization.According to the thrombolysis in cerebral infarction （TICI） grades after procedure,the forward flow after recanalization was systematically evaluated,and grade ≥2b was defined as the success of recanalization.Results The median time between the first onset of symptoms and recanalization was 50 （range,18-365） days.The occluded recanalization sites included intracranial segment of vertebral artery in 12 cases and intracranial segment of internal carotid artery in 3 cases.Recanalization was successful in 13 cases and recanalization failure of the intracranial segment of vertebral artery was in 2 cases.Recanalization was successful in 13 cases,and intracranial vertebral artery recanalization failed in 2 cases.Of the 13 patients of successful recanalization,the forward flow of angiography returned to grade TICI 3 in 12 cases after recanalization,and returned to TICI 2b in 1 case;the symptoms of 7 cases were