Aneurysms usually develop at branching points of arteries and are caused by constant pressure from blood flow. As blood passes through the weakened blood vessel, the blood pressure causes a small area to bulge outwards.
High blood pressure is the leading cause of subarachnoid hemorrhage. Heavy lifting or straining can cause pressure to rise in the brain and may lead to an aneurysm rupture. Aneurysms may be associated with other types of blood vessel disorders, such as fibromuscular dysplasia, cerebral arteritis or arterial dissection, but these are very unusual.
Brain aneurysms usually develop as people age, becoming more common after 40. It’s also possible to have a blood vessel defect at birth.
A brain aneurysm can leak or rupture, causing bleeding into the brain (hemorrhagic stroke). Most often, a ruptured brain aneurysm occurs in the space between the brain and the thin tissues covering the brain. This type of hemorrhagic stroke is called a subarachnoid hemorrhage. A brain aneurysm may cause symptoms such as headaches or double vision. Many times, they cause no symptoms at all.
There are different types:
*Saccular aneurysms
*Fusiform aneurysms
Brain aneurysm
