Such ischemia most often results from hypotension (shock) from cardiac failure, from marked blood loss, or from loss of blood supply from mechanical obstruction (as with the bowel incarcerated in a hernia or with volvulus or intussusception).

• 局部缺血常见于由心衰、大量失血、血管受阻（见于肠疝、肠扭转或肠套叠）所导致的低血压（休克）。