Evidence map›Paper›PMID 33367628›Full record

ArticleInteractive cardiovascular and thoracic surgery2021

Evolution from mitral annular dysfunction to severe mitral regurgitation in Barlow's disease.

Yasmine L Hiemstra, Anton Tomsic, Paola Gripari, Aniek L van Wijngaarden, Stéphanie L van der Pas, Meindert Palmen, Robert J M Klautz, Mauro Pepi, Jeroen J Bax, Victoria Delgado and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Interactive cardiovascular and thoracic surgery, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 10% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. Mitral Annular Disjunction: A Roadmap for the Surgeon.European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery · 2026
    Review
  5. Mechanisms of mitral valve development and disease.Frontiers in cardiovascular medicine · 2026
    Review
  6. Mitral Valve Surgery with and Without Mitral Annular Disjunction: A Meta-Analysis.Journal of cardiovascular development and disease · 2025
    Review
  7. Article
  8. Article
  9. Review
  10. Early Results of Minimally Invasive Mitral Valve Repair with Non-Resection Techniques in the Treatment of Barlow Disease.Acta informatica medica : AIM : journal of the Society for Medical Informatics of Bosnia & Herzegovina : casopis Drustva za medicinsku informatiku BiH · 2025
    Article
  11. Characterisation of global and regional mitral annular strains in an acute porcine model.Interdisciplinary cardiovascular and thoracic surgery · 2024
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
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  19. 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

11 authors at 3 institutions in 2 countries.

Yasmine L HiemstraDepartment of Cardiology, Leiden University Medical Center, Leiden, Netherlands.
Anton TomsicDepartment of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands.
Paola GripariCentro Cardiologico Monzino, IRCCS, Milan, Italy.
Aniek L van WijngaardenDepartment of Cardiology, Leiden University Medical Center, Leiden, Netherlands.
Stéphanie L van der PasDepartment of Biomedical Data Sciences, Leiden University Medical Center, Leiden, Netherlands.
Meindert PalmenDepartment of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands.
Robert J M KlautzDepartment of Cardiothoracic Surgery, Leiden University Medical Center, Leiden, Netherlands.
Mauro PepiCentro Cardiologico Monzino, IRCCS, Milan, Italy.
Jeroen J BaxDepartment of Cardiology, Leiden University Medical Center, Leiden, Netherlands.
Victoria DelgadoDepartment of Cardiology, Leiden University Medical Center, Leiden, Netherlands.
Nina Ajmone MarsanDepartment of Cardiology, Leiden University Medical Center, Leiden, Netherlands.
Leiden University Medical Center · NLCentro Cardiologico Monzino · ITLeiden University · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesBarlow's disease (BD) is characterized by thick, redundant mitral valve (MV) leaflets, which can lead to prolapse and significant mitral regurgitation (MR). MV annular abnormalities are also commonly observed and increasingly recognized as possible primary pathology, with leaflet thickening being secondary to increased stress on the MV apparatus. To provide more insights into this hypothesis, the evolution of MV abnormalities over time in patients with BD was assessed.

methodsA total of 64 patients (54 ± 12 years, 72% male) with BD who underwent MV surgery and had multiple transthoracic echocardiograms (TTE) before surgery were included. In total, 186 TTE were analysed (median time interval 4.2, interquartile range 2.2-6.5 years) including specific MV characteristics.

resultsAt baseline, MV leaflet length, thickness, billowing height and annular diameter were larger in patients with BD compared to 59 healthy subjects. Systolic outward motion (curling) of the annulus was observed in 77% and severe mitral annular disjunction (≥5 mm) in 38% of patients with BD. Forty (63%) patients had MR grade I-II and 24 (37%) MR grade III-IV; at baseline, the 2 groups only differed in left atrial volume and in thickness and billowing height of the posterior leaflet, showing comparable MV annular abnormalities and dilatation despite different grades of MR. Over time, MV annulus diameter, leaflet length and billowing height increased significantly along with MR grade.

conclusionsIn patients with BD, MV annulus abnormalities are present at an early stage and precede the development of significant MR, suggesting their substantial role in the pathophysiology of this disease and as an important target for surgical treatment.

Indexed as

Cardiac Surgical ProceduresMitral Valve InsufficiencyAdultAgedEchocardiographyFemaleHumansMaleMiddle AgedMitral ValveMitral Valve ProlapseBarlow’s diseaseEchocardiographyLongitudinal changesMitral valve prolapseMitral valve repair

Identifiers

PMID33367628
PMCPMC8906724
OpenAlexW3116110674

What OpenQuestion holds

Textmetadata
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.