thgank you and pleased to answer you Abdominal complications is linked to duration of Cardiopulmonary bypass (CPB). Erosive gastritis, gastrointestinal hemorrhage and bowel bleeding management is relatively simple in most cases. Paralytic ileus and colonic pseudo-obstruction usually occur after the third postoperative day after cardiac surgery. Different factors may contribute to this group of complications, such as arterial or venous mesenteric thrombosis or in an overwhelming majority of cases nonocclusive mesenteric ischemia. Proximal colon distension, in the absence of an obstructing cause, have been reported by multiples studies on cardiac surgery. Most of them resolve spontaneously after enemas or colonoscopy, however, few of them go on to perforate. Such a complication should be promptly recognized and treated. The appropriate therapy is decompression by colonoscopy or, if not effective or possible at all, a colostomy at the hepatic flexure may be required. Patients with paralytic ileus were successfully treated by enemas and nasogastric aspiration. In some cases, cholinergic drugs have been described to be helpful. the major life-threatening complication following open-heart surgery is intestinal ischemia which has a tremendously high mortality. The typical clinical symptoms consist of tachycardia, increasing pyrexia, massive perspiration, abdominal pain and swelling in critically ill patients. May this opinion help you best wishes.