Several Risk Factors for Aneurysmal Subarachnoid Hemorrhage

Abstract

We reviewed current literature on the role of seasonal, meteorological, or circadian factors in ruptured cerebral aneurysms. We found that cerebral aneurysm rupture most frequently occurs in winter and spring, and less frequently in summer. The highest number of ruptured cerebral aneurysms happens in the morning, between 8 am and 12 pm. The data regarding meteorological factors' effect on the risk of cerebral aneurysm rupture are conflicting. However, it should be noted that changes in barometric pressure and falling temperature are associated with the risk of aneurysmal subarachnoid hemorrhage.

Keywords

• subarachnoid hemorrhage
• aneurysm
• risk factors