What does it mean when an aortic aneurysm ruptures?
The wall of the aorta tears because of increased pressure from the expanding aneurysm. Ruptures can be "contained, " with the bleeding confined by the lining of the abdominal cavity, or they can be "free ruptures, " when the bleeding occurs into the abdominal cavity.
The second type is more deadly. Mortality with ruptured aneurysms is 50-90%. As many as 50% of people die before reaching the hospital.