Mountain air test: how asthma hearts handle high altitude

NCT ID NCT07431580

Recruiting now Knowledge-focused Sponsor: Mona Lichtblau Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at how simulated high altitude (2,500 m and 4,000 m) affects the right side of the heart in people with well-controlled asthma. Eighteen participants will breathe special gas mixtures to mimic altitude while resting and doing light exercise. The goal is to learn how the heart responds to low oxygen, which could help guide future advice for asthmatics who enjoy mountain sports.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: normobaric hypoxia (simulated altitude via gas mixture)
What this could lead to: If successful, this study could help doctors better understand how to support people with asthma during mountain activities.
What could go wrong: This is a small, early-stage study with only 18 participants, so results may not apply to everyone. It measures temporary effects, not long-term outcomes.

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Conditions

The condition(s) this trial relates to.

altitude sickness asthma Dyspnea Hypoxia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

HYPOXIA HYPOXIA, ALTITUDE NORMOBARIC HYPOXIA RIGHT VENTRICULAR FUNCTION

Contacts and locations

Locations

Consultant Clinic of Pulmonology, University Hospital of Zurich
RECRUITING

Zurich, Canton of Zurich, 8091, Switzerland

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