Objective: Multiple aneurysms are common in patients with subarachnoid hemorrhage, their characteristics influence the prognosis of the patient, so their study and analysis are relevant. The objective of this study was to know the epidemiological, clinical and lab characteristics of patients with multiple aneurysms in a surgical treatment in the Guillermo Almenara Irigoyen National Hospital (HNGAI) from January 2010 to August 2017.

Methods: This study was descriptive, cross-sectional retrospective study with epidemiological type. We found 311 cases of patients with aneurysm clipping procedure of which 57 corresponded to a multiple aneurysm.

Results: Of the total number of patients, 71.93% were 50 or older, 75.44% were women and 82.46% were from the coast of the country. It was found that 28% of the patients had previous hypertension. 64.91% of patients had a Glasgow scale of 14-15 on admission, 47.37% were in the Hunt Hess II stage and 45.62% in the Fisher IV Scale.  The most frequent location of the multiple aneurysms was the combination of middle cerebral artery - middle cerebral artery and the combination of middle cerebral artery - posterior contralateral communicating artery.

Conclusions: Multiple aneurysms are a frequent pathology related to female sex, advanced age and history of hypertension. The predominant affectation is the middle cerebral artery, bilaterally.