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A 45 year-old man developed the lightening onset of an
followed by coma.
Cerebral Angiogram, Left Vertebral injection. (Left) AP view; (Right) Lateral view. Note the large aneurysm at the tip of the basilar artery. Spontaneous subarachnoid hemorrhage is most often caused by a ruptured aneurysm. They usually present with sudden headache, nausea, and vomiting, often associated with signs of increased intracranial pressure. Rarely, an aneurysm may enlarge and present with focal signs from a mass effect.
The Electronic Curriculum is copyrighted 1998, Case Western Reserve University School of Medicine.