患者女,65岁,因腹痛、腹泻1天于2007年12月16日入院。患者无明显诱因突然出现脐周及下腹阵发性绞痛伴暗红色黏液便,约100mL,既往有风湿性心脏病病史20余年,心房纤颤8年,6年前脑栓塞1次,2年前因右下肢动脉栓塞行右小腿截肢术。入院查体:体温37℃,脉搏128次/min,血压140/70mm Hg, Female patient, age 65, was admitted to hospital on December 16, 2007 due to abdominal pain and diarrhea. Patients with no obvious incentive to suddenly appear umbilical and lower abdomen paroxysmal angina with dark red mucus, about 100mL, previous history of rheumatic heart disease more than 20 years, 8 years of atrial fibrillation, 6 years ago, cerebral embolism 1, 2 years Before the right lower extremity arterial embolism right leg amputation. Admission examination: body temperature 37 ℃, pulse 128 beats / min, blood pressure 140 / 70mm Hg,