<prompt> Borchardt;s triad of acute epigastric pain, violent retching and inability to pass a nsogastric tube is seen in patients withAchalasia cardiaAcute gastric volvulusJejunogastric intussusceptionHitus hernia  <response>: A volvulus is a twisting or axial rotation of a poion of bowel about its mesentery. When complete it forms a closed loop of obstruction with resultant ischaemia secondary to vascular occlusion. Ref: Bailey Love;s Sho Practice of Surgery,E25,Page-1193 