Risk factors that doctors and researchers believe contribute to the formation of brain aneurysms:
Smoking
High blood pressure or hypertension
Congenital resulting from inborn abnormality in artery wall
Family history of brain aneurysms
Age over 40
Gender, women compared with men have an increased incidence of aneurysms at a ratio of 3:2
Other disorders: Ehlers-Danlos Syndrome, Polycystic Kidney Disease, Marfan Syndrome, and Fibromuscular Dysplasia(FMD)
Presence of an arteriovenous malformation (AVM)
Drug use, particularly cocaine
Infection
Tumors
Traumatic head injury
Risk factors that doctors and researchers believe contribute to the rupture of brain aneurysms:
Smoking
High blood pressure or hypertension
African-Americans at twice the rate of rupture of whites (a 2.1:1 ratio)
Hispanics at nearly twice the rate of rupture of whites (a 1.67:1 ratio)
