Why the study?
Does acute exposure to 3,660 m altitude affect orthostatic responses and tolerance in subjects?
Population
14 subjects
Comparison
Acute exposure to 3,660 m altitude in a… vs Testing at 375 m altitude
Follow-up
60 min
Authors
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May increase presyncope risk during orthostasis at altitude; hypothesis-generating and requires validation before clinical application.
Does acute exposure to 3,660 m altitude affect orthostatic responses and tolerance in subjects?
Acute exposure to high altitude increases susceptibility to presyncope during orthostatic stress due to ineffective peripheral vasoconstriction and hypocapnia-induced cerebral vasoconstriction.
Blaber et al. (2003) studied this question.
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