Purpose:To evaluate the efficacy and safety of endovascular therapy in intracranial dural arteriovenous fistulas supplied with externalcarotidarteries(ecaDAVFs).
目的：评估经动脉颗粒栓塞颈外动脉供血型硬膜动静脉瘘的应用技术和临床效果。
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Objective To observe structures and blood kinetics status of common carotid, internal and externalcarotidarteries of the hypertension patients with ultrasound technique.
Arterial supply is usually through meningeal branches of the externalcarotid, internal carotid, and vertebral arteries. Drainage is via dural venous sinuses or other dural or leptomeningeal channels.