A rare case of volvulus after off-pump coronary artery bypass graft surgery in an opium addict patient revised

Volvulus of colon is a very rare phenomenon in post cardiac surgery course, and their predicting factor in most patients is unknown. Between colonic volvulus, splenic flexure is the rarest site for torsion in general population. The main symptoms are vague abdominal pain, vomiting and distension. The primary diagnostic images include plain chest x-ray, CT scan and colonoscopy. We report the case of a 57-year -old opium male addict, who was. Admitted for abdominal pain, nausea, and vomiting five days after off-pump coronary artery bypass surgery (OPCAB). An abdominal x-ray reported a colonic volvulus. Exploratory laparotomy showed acute abdomen resulting from a gangrene of long segment of splenic flexure caused by volvulus. Gastrointestinal complication such as volvulus is an exceedingly rare complication of OPCAB, despite the absence of anatomic abnormalities only complete colonic malrotation as the result of mega colon and constipation, the main pathogenetic causes. This patient was unique because of careful literature search revealed that this case was the first reported volvulus that has been described so far.