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Subarachnoid Hemorrhage - Basilar Artery Aneurysm - Case 2

A 52 year-old man developed the lightening onset of an explosive headache followed by coma.

Outline the Aneurysm

Cerebral Angiogram, Left Vertebral injection. (Left) AP view; (Right) Lateral view. Note the large aneurysm at the tip of the basilar artery  [ACIA = anterior inferior cerebellar artery; PCA = Posterior cerebral 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.

Revised 05/01/06.
The Electronic Curriculum is copyrighted 1998,  Case Western Reserve University School of Medicine.