What is the most common cause of near syncope?
A. Perilymph fistula
B. Somatosensory deficits
C. Cardiovascular disorders
D. Psychologic or stress disorders
E. Motion sickness
ANS: C
Rationale: Cardiovascular disorders are the most frequent cause of near syncope (nearly fainting). Psychologic or stress disorders are most frequently associated with light-headedness. Perilymph fistula causes hearing loss and vertigo provoked by pressure changes. Motion sickness consists of nausea, headache, anxiety, and vomiting sometimes experienced in moving vehicles.
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