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Understanding : 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)Arteriovenous malformation (AVM)
    A particular type of vascular malformation of the brain. An abnormal collection or tangle of arteries and veins located within the substance of the brain in which a maldevelopment of capillaries (which normally connect the arteries and veins) allows a high flow short cut through the brain.
  • 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