Abstract:Although 15 to 20 percent of patients with subarachnoid haemorrhage (SAH) do not have a vascular lesion on four-vessel cerebral angiography, venous injury is a potential cause. This case describes an intracranial catheter associated with nonaneurysmal SAH. It suggests that intrathecal catheters can cause vascular injury, and that nonaneurysmal perimesencephalic SAH may be due to injury of small blood vessels.
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