Lightheadedness in Surgery — 60yo Woman | General Surgery | SMLE Q#11102
SMLE Question #11102
Surgery
General Surgery
Objective: OBJ-TRACH-EMERG-01
Last updated: February 2026
A 60-year-old woman presents to the emergency department after passing a large amount of maroon stool with lightheadedness. She is pale and diaphoretic. Her abdomen is soft and nontender; rectal examination confirms maroon blood. She has no hematemesis. Two large-bore IV lines are placed, and she receives IV crystalloids and crossmatched blood; her blood pressure and heart rate normalize. After initial resuscitation, what is the most appropriate next diagnostic step to localize the bleeding source?
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