Mortality in 100 patients undergoing resection of ruptured atherosclerotic aneurysms of the abdominal aorta was 58%. In addition to advanced age and concurrent cardiac disease, lethal factors included preoperative hypotension, cardiac arrest, anuria, and free intra-abdominal rupture. Failure to establish the correct diagnosis until the onset of these four signs contributed to the high mortality.
(JAMA 233:147-150, 1975)
Ottinger LW. Ruptured Arteriosclerotic Aneurysms of the Abdominal AortaReducing Mortality. JAMA. 1975;233(2):147–150. doi:10.1001/jama.1975.03260020033020