Ruptured Aortic Aneurysm
lEnlargement of abdominal aorta > 3cm
nUsually 2° to atherosclerosis
nBelow renals, above iliacs
lAbout 20-25% rupture
n<4cm~10%; >10 cm~60%
nRetroperitoneal, usually on left
nInto GI tract: massive hemorrhage
nInto IVC: rapid cardiac decompensation
n
An aneurysm is considered present whenever there is enlargement of abdominal aorta > 3cm
They are usually 2 to atherosclerosis
They usually occur below renals and above the iliacs
About 20-25% rupture
<4cm~10%; >10 cm~60%
When  they rupture, they rupture into the retroperitoneum, usually on left side
If they rupture into the into the GI tract they can lead to massive hemorrhage
If they rupture into IVC they can lead to rapid cardiac decompensation