CAUSES & RISK FACTORS OF BRAIN ANEURYSMS

The following risk factors may increase your risk of developing an aneurysm or increase your risk of a rupture if you already have one. Fortunately, some can be controlled.

Hypertension
Smoking
Excessive Alcohol Use
Drug Use ( particularly cocaine)
Head Injury
Family history of brain aneurysm, particularly of first degree relative such as a parent, brother, sister or child. However, it has been known for brain aneurysms to be found in second degree relatives such as grandparents, grandchildren, uncles, aunts, nephews, nieces and half siblings.
Inherited connective tissue disorders such as Ehlers-Danlos syndrome, that weakens blood vessels
Polycystic kidney disease, an inherited disorder that results in fluid-filled sacs in the kidneys and usually increases blood pressure
Abnormally narrow aorta (coarctation of the aorta), the large blood vessel that delivers oxygen rich blood from the heart to the body
Presence of a Cerebral AVM (Arteriovenous Malformation) an abnormal connection between arteries and veins in the brain that interrupts the normal blood flow between them