Evidence map›Paper›PMID 34526314›Full record

ReviewEuropean respiratory review : an official journal of the European Respiratory Society2021

Impairment of hypoxic pulmonary vasoconstriction in acute respiratory distress syndrome.

Mareike Gierhardt, Oleg Pak, Dieter Walmrath, Werner Seeger, Friedrich Grimminger, Hossein A Ghofrani, Norbert Weissmann, Matthias Hecker, Natascha Sommer

2 registry-linked trialsAbstract readReview
In one paragraph

Review in European respiratory review : an official journal of the European Respiratory Society, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing 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.

NCT05374577 active not recruitingnot on this mapstarted 2022, after this paper: background citation

Pulmonary Vascular Dysfunction as a Cause of Persistent Exertional Dyspnea After COVID-19 (PulmVasC)- A Multicenter, Prospective Cohort/Observational Study

TypeobservationalSponsorUniversity of GiessenRan2022 to 2025Enrolled200ConditionsCOVID-19Armspulmonary vascular dysfunction, pulmonary vascular function
NCT06181539 completednot on this mapstarted 2023, after this paper: background citation

Evaluate the Effect of Prone Ventilation on Ventilated-blood Flow Ratio in Patients With Acute Respiratory Distress Syndrome by Electrical Impedance Tomography

TypeobservationalSponsorUnion Hospital, Tongji Medical College, Huazhong University of Science and TechnologyRan2023 to 2025Enrolled94ConditionsAcute Respiratory Distress Syndrome, Electrical Impedance Tomography, Prone Position Ventilation, Ventilation Perfusion Mismatch
3 · Its place in the literature

Who cites it

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

  1. Pooled it
  2. Trial
  3. Article
  4. Right ventricular-protective ventilation in acute respiratory distress syndrome: phenotypes, monitoring and ventilatory management.European respiratory review : an official journal of the European Respiratory Society · 2026
    Review
  5. Article
  6. Review
  7. Review
  8. Review
  9. Observational
  10. Right-sided heart failure in acute respiratory distress syndrome.European respiratory review : an official journal of the European Respiratory Society · 2025
    Review
  11. Article
  12. Observational
  13. Review
  14. Observational
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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

9 authors.

Mareike GierhardtDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Oleg PakDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Dieter WalmrathDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Werner SeegerDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.ORCID https://orcid.org/0000-0003-1946-0894
Friedrich GrimmingerDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Hossein A GhofraniDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.ORCID https://orcid.org/0000-0002-2029-4419
Norbert WeissmannDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Matthias HeckerDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.
Natascha SommerDept of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Acute respiratory distress syndrome (ARDS) is a serious complication of severe systemic or local pulmonary inflammation, such as caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. ARDS is characterised by diffuse alveolar damage that leads to protein-rich pulmonary oedema, local alveolar hypoventilation and atelectasis. Inadequate perfusion of these areas is the main cause of hypoxaemia in ARDS. High perfusion in relation to ventilation (V/Q<1) and shunting (V/Q=0) is not only caused by impaired hypoxic pulmonary vasoconstriction but also redistribution of perfusion from obstructed lung vessels. Rebalancing the pulmonary vascular tone is a therapeutic challenge. Previous clinical trials on inhaled vasodilators (nitric oxide and prostacyclin) to enhance perfusion to high V/Q areas showed beneficial effects on hypoxaemia but not on mortality. However, specific patient populations with pulmonary hypertension may profit from treatment with inhaled vasodilators. Novel treatment targets to decrease perfusion in low V/Q areas include epoxyeicosatrienoic acids and specific leukotriene receptors. Still, lung protective ventilation and prone positioning are the best available standard of care. This review focuses on disturbed perfusion in ARDS and aims to provide basic scientists and clinicians with an overview of the vascular alterations and mechanisms of V/Q mismatch, current therapeutic strategies, and experimental approaches.

Indexed as

COVID-19Respiratory Distress SyndromeHumansHypoxiaLungSARS-CoV-2Vasoconstriction

Identifiers

PMID34526314
PMCPMC9489056

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

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.