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Porto Alegre PAH Cardiac MRI Cohort

Santa Casa de Misericórdia de Porto Alegre, cardiac MRI of patients with pulmonary arterial hypertension diagnosed by right heart catheterization

Cardiac MRI of patients with pulmonary arterial hypertension, used to compare right atrial area and right ventricular ejection fraction with catheterization, echocardiography, walk test and NT-proBNP markers. Images are not shared; only the paper's figures and tables are public.

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Overview

This entry covers the cardiac MRI cohort of a retrospective single-center study of pulmonary arterial hypertension (PAH) at a referral center in Porto Alegre, Brazil, with authors from the Pulmonary Hypertension Group of Santa Casa de Misericórdia de Porto Alegre and UFCSPA. The authors measured right atrial (RA) area and right ventricular ejection fraction (RVEF) on cardiac MRI and tested how each relates to established prognostic markers: right heart catheterization (RHC) hemodynamics, echocardiographic RA area and TAPSE, six-minute walk distance and NT-proBNP. RVEF correlated more strongly with these markers than RA area did. The images are not public. The figshare record linked to the paper holds only its figures and tables.

Composition

The study includes 74 patients with PAH confirmed by RHC between January and May 2018, each with cardiac MRI within three months of the catheterization. Table 1 reports 61 women (82.4%) and a mean age of 42 years (SD 15). The causes were idiopathic PAH (32), corrected congenital heart disease (24), connective tissue disease (14), HIV (3) and portopulmonary hypertension (1). Forty-seven patients were in functional class I/II and 27 in class III/IV. Ten patients died during follow-up.

Acquisition

All scans were acquired on one 1.5 T Siemens Magnetom Aera. The protocol included a half-Fourier single-shot turbo spin-echo (T2-weighted) sequence, ECG-gated balanced steady-state free-precession cine in four-chamber and short-axis views, and a phase-contrast flow sequence orthogonal to the pulmonary artery trunk.

Annotations

A chest radiologist segmented the right and left ventricles on short-axis cine images with CardiacVX (GE Healthcare) and measured the RA area at its largest extent in the four-chamber view. Two radiologists reviewed every study, with a third resolving disagreements.

Known limitations

  • Images, segmentations and measurements are not shared, and the paper has no data availability statement.
  • Small retrospective cohort of patients already diagnosed with PAH, which the authors name as a selection bias.
  • Table 1 gives the RA area without a unit.

Cohort

Aggregate numbers from the sources below. Bars are relative to the 74 subjects.

Sex

  • Female 61 100%

Covers 61 of 74 subjects.

Table 1 in Mello et al. 2019, Radiologia Brasileira 52(6)

Scanner vendor

  • Siemens Healthineers 74 100%

Cardiac MRI protocol in Mello et al. 2019, Radiologia Brasileira 52(6)

Country

  • Brazil 74 100%

Affiliations; Materials and Methods in Mello et al. 2019, Radiologia Brasileira 52(6)

Age

mean 42

No age bins reported.

Table 1 in Mello et al. 2019, Radiologia Brasileira 52(6)

Condition

Groups can overlap

  • Pulmonary arterial hypertension 74 100%

Table 1 in Mello et al. 2019, Radiologia Brasileira 52(6)

Field strength

  • 1.5 T 74 100%

Cardiac MRI protocol in Mello et al. 2019, Radiologia Brasileira 52(6)

License and access

Our reading of the license, not legal advice. Before you use the data, read the original license and confirm that your use is allowed. We take no responsibility for how you use a dataset. Full disclaimer

Access
Not shared

The data are not available outside the institution or study that holds them

The paper has no data availability statement and the cohort was identified retrospectively from a referral center's records. The figshare record that accompanies the paper holds only its two figures and three tables.

Access page

No published license or data use terms

The data holder has published no license and no data use terms. Any use, sharing or commercial right has to be agreed with the data holder, and nothing can be assumed to be allowed. Default copyright and data protection law still apply.

No license or data use terms are published for the images. The CC BY 4.0 license of the paper and the figshare record covers only the article, figures and tables.

Original license text Checked 2026-10-08

What you can do

  • Commercial use Not stated
  • Not stated
  • Train ML models Not stated
  • Create derived data Not stated
  • Publish results Not stated

What you can share

  • Share the data Not stated
  • Share derived data Not stated
  • Share trained models Not stated

What you must do

  • Cite or credit Not stated
  • Share alike Not stated
  • Sign an agreement Not stated
  • Ethics approval Not stated
  • Manuscript review Not stated
  • Release code Not stated
  • Return results Not stated
  • Delete after use Not stated

Limits

  • No re-identification Not stated
  • Location limits Not stated

Citation

Mello, M. M., Watte, G., Altmayer, S., Pallaoro, Y. L. R., Spilimbergo, F. B., Blanco, D. C., Meyer, G. M. B., Marchiori, E., & Hochhegger, B. (2019). Relationship between right atrium area and right ventricular ejection fraction on magnetic resonance imaging: comparison with other prognostic markers in patients with pulmonary arterial hypertension. Radiologia Brasileira, 52(6), 351-355. https://doi.org/10.1590/0100-3984.2018.0128

Sources

Every number on this page comes from one of these documents. Each chart names the table or page it is taken from. The raw numbers are in stats.csv.