Other causes of syncope include neurologic
events (such as vasovagal response), medication
side effects, heat, DEHYDRATION, fear, FEVER, and
PREGNANCY. Most people regain consciousness
within a few seconds to three minutes. Syncope
may be an isolated event or a symptom of under-
lying health concerns. A doctor should evaluate
recurrent episodes of syncope. Such an evaluation
typically includes a NEUROLOGIC EXAMINATIONand an
ELECTROCARDIOGRAM(ECG).
See also ADVERSE REACTION; CRANIAL NERVES; GAS-
TROPARESIS; SEIZURE DISORDERS; UNCONSCIOUSNESS.syncope 109