ANGIOGRAPHIC FINDINGS IN 130 PATIENTS WITH ANEURYSMAL SUBARACHNOID HEMORRHAGE

Objectives: To evaluate the distribution and multiplicity of intracranial aneurysms in patients with aneurysmal subarachnoid hemorrhage (SAH) and to characterize the age and sex distribution of these patients. Methods: We reviewed 130 patients with aneurysmal SAH documented by cerebral digital subtraction angiography (DSA). Results: The mean age of patients was 45.8 years, with a female to male ratio of 0.68. In 13 (10%) patients there were multiple aneurysms. In 7 (5.4%) patients a giant aneurysm was discovered. Of 143 documented aneurysms found in 130 patients, the most frequent locations were anterior communicating artery (AComA) (29.4%), middle cerebral artery (MCA) bifurcation (21.0%), posterior communicating artery (PComA) (4.7%), internal carotid artery (ICA) bifurcation (9.8%), basilar tip (5.6%), pericallosal artery (5.6%), M1 segment of ICA (excluding ophthalmic and PComA origin) (2.8%), cavernous portion of ICA (2.8%), and ophthalmic artery origin of ICA (2.1%). The least common site for aneurysm was posterior inferior cerebellar artery (PICA) origin (1.4%). Conclusion: Our findings of the distributions of the aneurysms and the female to male ratio, suggest a contribution of ethnic background, which may need to be considered in diagnosis of these patients.