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Aneurysm

Brain Aneurysms: A Hidden Risk in Up to 5% of the Population

Strategic Insights

— 1 min read

Up to 5% of Americans may have a brain aneurysm, a balloon-like swelling that forms when a blood vessel wall is stretched out by blood flow, according to the American Heart Association. While most people with brain aneurysms are asymptomatic, those that rupture can cause severe damage, including stroke, brain damage, coma, or death. Reality TV star and mom Kim Kardashian recently disclosed that a small aneurysm was detected in her brain, highlighting the importance of awareness and early detection. Factors that can weaken arteries and lead to a brain aneurysm include high blood pressure, cigarette smoking, and connective tissue disorders such as Marfan syndrome.

Key Takeaways:

  • Up to 5% of the U.S. population may have a brain aneurysm, according to the American Heart Association.
  • Brain aneurysms are more common in women, particularly after menopause, and among Black and Latino adults.
  • Factors that can weaken arteries and lead to a brain aneurysm include high blood pressure, cigarette smoking, and connective tissue disorders.
  • Brain aneurysms are often found during medical imaging tests such as MRIs or CT scans for unrelated issues.
  • Symptoms of a large, unruptured aneurysm may include a drooping eyelid, vision changes, weakness, or numbness.
  • If an aneurysm ruptures, it can cause a stroke, brain damage, coma, or death.
  • Treatment options for brain aneurysms include monitoring, surgically clamping the bubble, coiling, mesh stents, and medications.
  • Large, complex cerebral aneurysms may require a blood vessel bypass procedure in the brain.
  • With timely treatment and follow-up, many people recover from a brain aneurysm, according to the National Institute of Neurological Disorders and Stroke.

Statistics:

  • 3-5% of Americans may have a brain aneurysm (American Heart Association, Jan. 30, 2024).
  • Brain aneurysms are more common in women, particularly after menopause (36-50 years old) (American Heart Association, Jan. 30, 2024).
  • Black and Latino adults are more likely to develop brain aneurysms (American Heart Association, Jan. 30, 2024).
  • High blood pressure, cigarette smoking, and connective tissue disorders are risk factors for brain aneurysms (Brigham and Women's Hospital, 2025).

Sources:

  • NBC News, Oct. 23, 2025
  • American Heart Association, Jan. 30, 2024
  • Brigham and Women's Hospital, 2025
  • National Institute of Neurological Disorders and Stroke

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