When a brain aneurysm ruptures, it can kill cells in the brain even if the bleeding only lasts for a few seconds. When bleeding occurs, it will also interfere with the amount of oxygen the brain receives. In turn, there is an increase in pressure on the brain. It is possible for bleeding to occur again after surgery.
Vasospasm may occur in some cases, causing the blood vessels in the brain to narrow. This condition can cause an ischemic stroke and damage to these vessels. Another complication is hyponatremia, which can cause a drop in sodium levels, leading to permanent brain damage. The last complication is hydrocephalus, which occurs when an aneurysm ruptures. Hydrocephalus can block cerebrospinal fluid from flowing properly, resulting in an excess amount of fluid in the brain.

utah778 / Getty Images
This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.