The
expansion of a
vein,
artery, or the
heart due to the
weakening of the wall of the
vessel via
disease,
injury, or
birth defect. Can be caused/
aggrivated by
high blood pressure. Not always
fatal, but nearly always
serious, and when one bursts in the
brain, a
stroke can occur. (When an aneurysm occurs in the
brain and causes a
stroke, it's called a
hemorrhagic stroke.)
They can be detected with an x-ray angiography, MRIs, and/or Computed Tomography. Symptoms of brain aneurysms include blurred vision and headaches, but often there are no symptoms of anything wrong.
These things are treated with surgery, which can include a metal clip attached at the bottom of the bulbous vessel or insertion of microcoils into the aneurysm itself.