An extreme increase in pressure within the abdominal cavity that disrupts the blood flow to vital organs. It can result from any condition that causes an accumulation of blood or fluid within the abdominal space or a decrease in size of the abdominal cavity, including abdominal or pelvic trauma, intra-abdominal hemorrhage, peritonitis, extensive abdominal packing, and postoperative edema of the gastrointestinal tract.