Effect of Acute Hypoxia on RIght VEntRicular Function in Asthma.
Recruiting now · Not applicable
Conditions studied: Hypoxia, Altitude, Hypoxia, Normobaric Hypoxia, Right Ventricular Function
In brief
More and more people are engaging in sports in the mountains, including individuals with heart or lung diseases. At the same time, such diseases are becoming more common in Switzerland. At high altitude, less oxygen is available, which places stress on the body-particularly on the heart, which has to pump blood through the lungs. How the heart, especially the right ventricle, in people with asthma responds to this stress is still not well understood. Therefore, this study investigates how the heart responds to simulated altitudes of 2,500 m and 4,000 m, both at rest and during light physical activity in patients with asthma. The primary objective is to assess how right ventricular function changes under conditions of reduced oxygen availability. In addition, vital signs, changes in blood gases, oxygen levels in blood and tissue and shortness of breath are assessed. The "altitude" is simulated using a special gas mixture that participants inhale. Participants undergo three altitude conditions (490, 2,500, and 4,000 m above sea level). The order of the altitude conditions is assigned at random. The aim is to better understand how the right ventricle and other parameters respond to low-oxygen conditions and how affected patients can be better supported in the future.
Key facts
- Study ID
- NCT07431580
- Run by
- Mona Lichtblau
- People needed
- 18
- Starts
- 2026-05-26
- Expected to finish
- 2030-01-01
- Last updated by the study team
- 2026-05-29
Who can join
Age: 18 and older, up to 80. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- Signed informed consent
- Diagnosed and well controlled asthma bronchiale
- 18-80 years (age group young: 18-39.99 years / age group older: 40-80 years)
- All sex and genders
- Living <800m and without altitude exposure > 2500 m and > 24h within the last three weeks
You may not qualify if…
- <18, >80 years old
- Any other diagnosed cardiopulmonary condition including past HAPE
- Other clinically significant severe concomitant disease states (e.g. renal, hepatic dysfunction, etc.)
- Inability to follow the procedures of the study due to language problems, psychological neurological disorders or orthopaedic disorders
- Participants permanently living >800m and altitude exposure > 2500 m and >24h within the last three weeks
- Pregnancy: Participants will be asked if pregnant or not, no screening for undetected pregnancy
- Lactating women
- Participation in other study with active treatment
Where it is running
- Consultant Clinic of Pulmonology, University Hospital of Zurich — Zurich, Canton of Zurich, Switzerland (enrolling)
Full record on ClinicalTrials.gov
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