Initial management of acute upper GI bleeding involves assessing the patient's hemodynamic stability and risk factors, performing endoscopy within 24 hours of presentation to determine the bleeding source, and considering pharmacologic or endoscopic therapies to control bleeding if a source is identified.

1. Fig. 5.1 Initial management in acute upper GI bleeding.
Stuart Bloom, George Webster, Daniel Marks
Oxford Handbook of Gastroenterology and Hepatology: Emergencies
Oxford University Press