Evidence map›Paper›PMID 34651040›Full record

ArticleERJ open research2021

Effect of a day-trip to altitude (2500 m) on exercise performance in pulmonary hypertension: randomised crossover trial.

Simon R Schneider, Laura C Mayer, Mona Lichtblau, Charlotte Berlier, Esther I Schwarz, Stéphanie Saxer, Lu Tan, Michael Furian, Konrad E Bloch, Silvia Ulrich

Abstract read
In one paragraph

Article in ERJ open research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Change in pulmonary artery pressure upon acute exposure to high altitude: a systematic review and meta-analysis.European respiratory review : an official journal of the European Respiratory Society · 2026
    Pooled it
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  8. Journal of preventive medicine and hygiene · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Simon R SchneiderClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0003-3635-0515
Laura C MayerClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.
Mona LichtblauClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0003-4485-1758
Charlotte BerlierClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.
Esther I SchwarzClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.
Stéphanie SaxerClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0002-3278-6277
Lu TanClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.
Michael FurianClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0002-8518-5029
Konrad E BlochClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.
Silvia UlrichClinic of Pulmonology, University Hospital of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0002-5250-5022

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

question addressed by the studyTo investigate exercise performance and hypoxia-related health effects in patients with pulmonary hypertension (PH) during a high-altitude sojourn. PATIENTS AND

methodsIn a randomised crossover trial in stable (same therapy for >4 weeks) patients with pulmonary arterial hypertension (PAH) or chronic thromboembolic pulmonary hypertension (CTEPH) with resting arterial oxygen tension (

results28 PAH/CTEPH patients (n=15/n=13); 13 females; mean±sd age 63±15 years were included. After >3 h at 2500 m

conclusionThis randomised crossover study showed that the majority of PH patients tolerate a day-trip to 2500 m well. At high

Identifiers

PMID34651040
PMCPMC8502941

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.