[Lethal portal venous gas after cardiopulmonary arrest].

We report the case of a 51-year-old patient admitted after a transient cardiorespiratory arrest. The abdominal CT scan revealed the presence of hepatic portal venous gas. At laparotomy, a diffuse mesenteric ischaemia was diagnosed. The patient died from multiple organ failure in the subsequent hours. Necrotic bowel is associated with hepatic portal venous gas in 50% of the cases and the current mortality rate is 85%. Gas originates either through intestinal transmucosal passage, either by intraportal bacterial gas production, or through both mechanisms.