Details

Autor(en) / Beteiligte

• Bradwell, Arthur R., FRCP
• Myers, Stephen D., PhD
• Beazley, Maggie, MRCGP
• Ashdown, Kimberly, MSc
• Harris, Nick G
• Bradwell, Susie B
• Goodhart, Jamie, BSc
• Imray, Chris H., FRCS
• Wimalasena, Yashvi, FCEM
• Edsell, Mark E., FRCA, FFICM
• Pattinson, Kyle T.S., DPhil, FRCA
• Wright, Alex D., FRCP
• Harris, Stephen J., CEng

Titel

Exercise Limitation of Acetazolamide at Altitude (3459 m)

Ist Teil von

• Wilderness & environmental medicine, 2014-09, Vol.25 (3), p.272-277

Ort / Verlag

Los Angeles, CA: Elsevier Inc

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Objective To assess the effect of acetazolamide (Az) on exercise performance during early acclimatization to altitude. Methods Az (250 mg twice daily) or placebo was administered for 3 days in a double-blind, randomized manner followed by a rapid ascent to 3459 m in the Italian Alps. Twenty healthy adults (age range, 18–67 years) were tested at 60% of sea-level peak power output for 15 minutes on a bicycle ergometer after 16 to 27 hours of altitude exposure. Exercise performance was measured in relation to peripheral oxygen saturations measured from pulse oximetry (Sp o2 ), Lake Louise acute mountain sickness (AMS) score, and perceived difficulty. Results At altitude, resting Sp o2 was higher in the Az group compared with placebo ( P < .001). The highest AMS scores were in 4 of the placebo individuals with the lowest resting Sp o2 ( P < .05). During the exercise test, Sp o2 fell in all but 1 subject ( P < .001) and was reduced more in the Az group ( P < .01). Four Az and 1 placebo subject were unable to complete the exercise test; 4 of these 5 had the largest fall in Sp o2 . The perception of exercise difficulty was higher in the Az subjects compared with those taking the placebo ( P < .01). There was an age relationship with exercise limitation; 4 of the 9 older than 50 years failed to complete the test whereas only 1 of 11 younger than 50 years failed, and there were no failures in the 6 younger than 30 years ( P < .05). Conclusions In this study group, and despite higher resting Sp o2 , Az may have compromised exercise at 3459 m altitude during early acclimatization, particularly in older subjects.