Acute Exposure of High Altitude on Cognitive Function

Low altitude baseline measurements will be performed in Zurich (460m) including Echocardiography, Right heart catheterization, 6 Minute walk test, pulmonary function test, clinical assessment and blood gas analysis. Randomly assigned to the order of testing, the participants will be tested in Low Altitude (Zurich, 470m) and at High Altitude (2500m). During the exposure to High Altitude (Säntis; 2500m above sea level) for approximately 5 hour, the participants will perform cognitive function test . The results will be compared to low altitude in Zurich (470m).