Cerebral Aneurysms: Causes and Risk Factors
A cerebral aneurysm refers to a condition where a blood vessel in the brain becomes weakened and expands or bulges out. This weakening can occur due to continuous pressure from blood flow or a vulnerability in the blood vessel wall. If the aneurysm ruptures, it can lead to a hemorrhage. Additionally, certain blood vessel disorders, such as fibromuscular dysplasia or arterial dissection, can contribute to the development of an aneurysm. Although cerebral aneurysms are more prevalent in specific families, not all cases have a genetic component. However, individuals with high blood pressure and those who smoke are at an increased risk of developing an aneurysm.
Understanding Arteriovenous Malformation
An arteriovenous malformation (AVM) refers to an abnormal cluster of blood vessels found within the brain or on its surface. This condition leads to the redirection of blood away from the normal brain tissue. Over time, these blood vessels expand and may eventually rupture due to the high pressure caused by arterial blood flow. In the unfortunate event of a hemorrhage caused by an AVM, the risk of fatality ranges from 10 to 15%, while the likelihood of sustaining permanent brain damage is estimated to be between 20 and 30%.