title: Emergency situations: acute upper gastrointestinal bleeding.
mesh_terms: D001803:Blood Transfusion; D003422:Critical Care; D004630:Emergencies; D004932:Esophageal and Gastric Varices / Q000628:therapy; D006471:Gastrointestinal Hemorrhage / Q000209:etiology / Q000601:surgery / Q000628:therapy; D006801:Humans; D008991:Monitoring, Physiologic