[Massive gastrointestinal hemorrhage following aortocoronary bypass operation].
D000208:Acute Disease; D001026:Coronary Artery Bypass; D006471:Gastrointestinal Hemorrhage / Q000209:etiology / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications