Evidence map›Paper›PMID 27492515›Full record

ArticleRespiratory medicine2016

Non-invasive screening for pulmonary hypertension in idiopathic pulmonary fibrosis.

Laith Alkukhun, Xiao-Feng Wang, Mostafa K Ahmed, Manfred Baumgartner, Marie M Budev, Raed A Dweik, Adriano R Tonelli

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Respiratory medicine, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
3.1field-weighted citation impact, top 8% of its field
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

23 citing papers in PubMed, 48 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. A Twist in the Fibrotic Tale: The Overlooked Vasculopathy in Idiopathic Pulmonary Fibrosis.American journal of respiratory and critical care medicine · 2025
    Article
  5. Pulmonary hypertension associated with lung diseases.The European respiratory journal · 2024
    Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Clinical evaluation on idiopathic pulmonary fibrosis.Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences · 2021
    Article
  15. Observational
  16. Review
  17. Article
  18. Updated Perspectives on Pulmonary Hypertension in COPD.International journal of chronic obstructive pulmonary disease · 2020
    Review
  19. Article
  20. Pulmonary hypertension in chronic lung disease and hypoxia.The European respiratory journal · 2019
    Review
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

7 authors at 2 institutions in 2 countries.

Laith AlkukhunDepartment of Internal Medicine, Cleveland Clinic, Cleveland, OH, USA. Electronic address: alkukhl@ccf.org.
Xiao-Feng WangRespiratory Institute Biostatistics Core, Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA. Electronic address: wangx6@ccf.org.
Mostafa K AhmedDepartment of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Chest Diseases, Faculty of Medicine, Assiut University, Assiut, Egypt. Electronic address: Ahmedm2@ccf.org.
Manfred BaumgartnerDepartment of Pulmonary Medicine, Billings Clinic, Billings, MT, USA. Electronic address: mbaumgartner@billingsclinic.org.
Marie M BudevDepartment of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA. Electronic address: budevm@ccf.org.
Raed A DweikDepartment of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA. Electronic address: dweikr@ccf.org.
Adriano R TonelliDepartment of Pulmonary, Allergy and Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH, USA. Electronic address: tonella@ccf.org.
Cleveland Clinic · USBillings Clinic · US

Funding

Case Western Reserve University/Cleveland Clinic CTSA (KL2)KL2RR024990 · NCRR · CASE WESTERN RESERVE UNIVERSITY · PI DAVIS, PAMELA B · 2007 to 2011
$9.5M
NCRR NIH HHS KL2 RR024990
6 · The paper itself

Abstract

backgroundPulmonary hypertension (PH) is a common complication of idiopathic pulmonary fibrosis (IPF) that is associated with poor prognosis. Noninvasive screening for PH in IPF patients is challenging and a combination of several noninvasive determinations can improve discrimination.

methodsWe included 235 IPF patients who underwent right heart catheterization (RHC) as part of the lung transplant evaluation. We measured electrocardiographic (ECG) and echocardiographic variables as well as the pulmonary artery (PA) and ascending aorta (AA) diameters on chest CT. We recorded results of arterial blood gases (ABG), pulmonary function (PFT) and 6-min walk tests (6MWT).

resultsSeveral variables were predictors of PH in IPF patients in univariable models including a lower arterial oxygenation and 6MWT distance; worse right ventricular (RV) function, rightward deviation of the QRS axis and a higher FVC/DLCOc ratio, PA/AA diameter ratio, and estimated RV systolic pressure. In multivariable analysis, a worse RV function and higher PA/AA ratio remained predictors of PH (c-index 0.75 (0.65-0.84)). Similarly, a worse RV function, a higher PA/AA ratio and a rightward QRS axis deviation were independent predictors of precapillary PH (c-index 0.86 (0.76-0.92)). A combination of PA/AA diameter ratio <1.1, a QRS axis <90° and normal RV function showed a negative predictive value of 85% for precapillary PH.

conclusionsThere are significant differences in ECG, echocardiographic, chest CT, PFT and ABG parameters between IPF patients with and without PH. However, these noninvasive tests alone or combination have limited discrimination ability for PH screening in IPF.

Indexed as

AgedAortaBlood Gas AnalysisCardiac CatheterizationEchocardiographyElectrocardiographyFemaleHumansHypertension, PulmonaryIdiopathic Pulmonary FibrosisLung TransplantationMaleMiddle AgedPredictive Value of TestsPulmonary ArteryRespiratory Function TestsComputed tomography scanEchocardiographyElectrocardiogramIdiopathic pulmonary fibrosisPulmonary hypertension

Identifiers

PMID27492515
PMCPMC4976395
OpenAlexW2415229514

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

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.