A 28-Year-Old Woman Recently Completed Her First Marathon in 4

A 28-year-old woman recently completed her first marathon in 4 hours and 20 minutes.  At the finish line, she complains of nausea.  Soon thereafter, she starts having a headache and begins to vomit.  She is taken to a nearby emergency department.  She denies any past medical history.
Her temperature is 37.2 C (99 F) , blood pressure is 125/72 mm Hg, and pulse is 84/min.  Her mucous membranes appear moist.  She is disoriented to time.  She experiences a generalized tonic-clonic seizure soon after arrival.
Which of the following is the most likely diagnosis?

A) Cerebellar stroke
B) Heat stroke
C) Hyponatremia
D) Rhabdomyolysis
E) Volume depletion

Correct Answer:

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