Manual assessment of the initial fall in blood pressure after orthostatic challenge at high altitude.

Journal article

OBJECTIVE: Dizziness is a symptom of acute mountain sickness (AMS). This study tested whether immediate fall in systolic blood pressure (BP) on standing was more severe at altitude and whether this was associated with symptoms of dizziness. METHODS: Eighty-five lowlanders flew into La Paz, Bolivia (3650 m), and after 4 to 5 days of acclimatization ascended in 90 minutes to the Chacaltaya Laboratory (5200 m) by road. Blood pressure was measured on 5 occasions, 3 times at 5200 m and twice at s...

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Authors: Mytton, O; Simpson, A; Thompson, A; Oram, R; Darowski, A

• Publication status: Published
• Journal: Wilderness and environmental medicine
• Volume: 19
• Issue: 4
• Pages: 225-232
• Publication date: 2008-01-01
• DOI: 10.1580/07-weme-or-097.1
• EISSN: 1545-1534
• ISSN: 1080-6032
• Language: English
• Keywords: Diastole; Dizziness; Altitude; Humans; Male; Female; Systole; Prevalence; Hypotension, Orthostatic; Altitude Sickness