Risk Factors

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)