View clinical trials related to Altitude Hypoxia.
Filter by:The investigators expect to find that different intensity and altitude exposure levels will show what kind of intermittent exposure protocol is more beneficial to athletes and healthy individuals that experience acute exposure to altitude during exercise. This may furthermore be related to acute altitude exposure for recreational exercise use as well.
This study involved human volunteers undertaking a high-altitude expedition. It assessed changes in physiological parameters of relevance to high-altitude cardiopulmonary physiology. Participants included a subgroup of those taking part in an existing adventurous training expedition and were randomised in a 1:1 fashion to receive either intravenous iron or normal saline several weeks prior to departure. During the expedition, participants were investigated by means of transthoracic echocardiography, peripheral oxygen saturation measurement and heart rate monitoring and through the drawing of venous blood samples. Bloods were later analysed for markers of iron status.
Randomized, placebo controlled trial evaluating efficacy of acetazolamide on right heart function at rest in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating the effect of acetazolamide on lung water content by ultrasound in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating efficacy of acetazolamide on right heart function during exercise in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating the effect of acetazolamide on visuo-motor learning performance in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating the effect of acetazolamide on sleep disordered breathing in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating the effect of acetazolamide on maximal exercise performance in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Randomized, placebo controlled trial evaluating the effect of acetazolamide on postural control in lowlanders older than 40 years travelling from 760 m to 3'100 m.
Low oxygen at altitude causes pauses in breathing during sleep, called central sleep apnea. Central sleep apnea causes repeated awakenings and poor sleep. Low oxygen itself and the induced oxidative stress can damage mental function which is likely worsened by poor sleep. Reduced mental function due to low oxygen can pose a serious danger to mountain climbers. However there is also mounting evidence that even in populations of people that live at high altitudes and are considered adapted, low oxygen contributes to reductions in learning and memory. Therefore there is a serious need for treatments which may improve sleep, control of breathing and mental function during low oxygen. Melatonin is a hormone produced in the brain during the night which regulates sleep patterns with strong antioxidant and anti-inflammatory properties. A study previously reported that melatonin taken 90 mins before bed at 4,300 m (14,200 ft) induced sleep earlier, reduced awakenings and improved mental performance the following day. However how melatonin caused these effects was not determined. Therefore this study aims to determine how melatonin effects control of breathing, sleep and mental performance during exposure to low oxygen.