Superior Mesenteric Artery Syndrome - Mortality

Mortality

SMA syndrome is estimated to have a mortality rate of 1 in 3. Delay in the diagnosis of SMA syndrome can result in fatal catabolysis (advanced malnutrition), dehydration, oliguria, electrolyte abnormalities, hypokalemia, acute gastric rupture or intestinal perforation (from prolonged mesenteric ischemia), gastrectasia, spontaneous upper gastrointestinal bleeding, hypovolemic shock, aspiration pneumonia, or sudden cardiovascular collapse (from increased velocity of bloodflow in the SMA due to the reduced mesenteric angle).