A patient comes with hematemesis and melena. On the upper GI endoscopy there was no significant finding. 2 days later the patient rebleeds. Next line of investigation is:
High-Yield Explanation
Ans. (b) Repeat upper GI endoscopyRef: Sabiston 19th Edition, Page 1166* Endoscopy is advised even in cases in which previous endoscopy doesn't show any abnormality.