I may not be a doctor, but ...
From time to time copy crosses the desk with a reference to dying from an aneurysm, which is only half right.
An aneurysm is a bulge like a balloon in a blood vessel with a weakened wall. You could possibly harbor one, undiagnosed, in your brain or in your aorta. It is a time bomb, potentially fatal. And yet you may have had it for years, carrying out normal activities. You will not die from having it. But you may well die if it ruptures before it has been identified and repaired by surgery.
Make that copy read dying from a ruptured aneurysm.