FCEM2-1234

FCEM2-1234

A 25 year old third year medical student is brought into the emergency department for a check up after fainting while observing a prolonged delivery that required an emergency C-section. The patient complains of feeling warm and sweaty for a couple of minutes before becoming lightheaded and losing consciousness. There were no reports of loss of bladder or bowel control, and no tongue biting was observed. Physical examination reveals no focal neurological deficits and a normal cardiovascular examination. Blood pressure is 122/74 mmHg when lying down and 120/72 mmHg when standing.

What is the probable cause of the fainting episode?