Evidence map›Paper›PMID 33775930›Full record

Trial reportEuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology2021

Proximal optimisation technique versus final kissing balloon inflation in coronary bifurcation lesions: the randomised, multicentre PROPOT trial.

Yusuke Watanabe, Yoshinobu Murasato, Masahiro Yamawaki, Yoshihisa Kinoshita, Munenori Okubo, Kazuhiko Yumoto, Naoki Masuda, Hiromasa Otake, Jiro Aoki, Gaku Nakazawa and 11 more

Abstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
–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

17 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Coronary Bifurcation PCI-Part I: Fundamentals.Journal of cardiovascular development and disease · 2025
    Review
  6. Article
  7. Review
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Post-stenting optimisation techniques in bifurcation percutaneous coronary interventions: much remains to be explored.EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology · 2021
    Article
  14. Standardisation of techniques for bifurcation stenting optimisation: the journey continues.EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology · 2021
    Article
  15. Reply: When is the optimal time point for detecting malapposition in coronary bifurcation trials?EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology · 2021
    Article
  16. Letter: When is the optimal time point for detecting malapposition in coronary bifurcation trials?EuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology · 2021
    Article
  17. Observational
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

21 authors.

Yusuke WatanabeDepartment of Medicine, Division of Cardiology, Teikyo University School of Medicine, Tokyo, Japan.
Yoshinobu Murasato
Masahiro Yamawaki
Yoshihisa Kinoshita
Munenori Okubo
Kazuhiko Yumoto
Naoki Masuda
Hiromasa Otake
Jiro Aoki
Gaku Nakazawa
Yohei Numasawa
Tatsuya Ito
Junya Shite
Takayuki Okamura
Kensuke Takagi
Kayoko Kozuma
Thierry Lefèvre
Bernard Chevalier
Yves Louvard
Nobuaki Suzuki
Ken Kozuma

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundClinical implications of the proximal optimisation technique (POT) for bifurcation lesions have not been investigated in a randomised controlled trial.

aimsThis study aimed to investigate whether POT is superior in terms of stent apposition compared with the conventional kissing balloon technique (KBT) in real-life bifurcation lesions using optical coherence tomography (OCT).

methodsA total of 120 patients from 15 centres were randomised into two groups - POT followed by side branch dilation or KBT. Finally, 57 and 58 patients in the POT and KBT groups, respectively, were analysed. OCT was performed at baseline, immediately after wire recrossing to the side branch, and at the final procedure.

resultsThe primary endpoint was the rate of malapposed struts assessed by the final OCT. The rate of malapposed struts did not differ between the POT and KBT groups (in-stent proximal site: 10.4% vs 7.7%, p=0.33; bifurcation core: 1.4% vs 1.1%, p=0.67; core's distal edge: 6.2% vs 5.3%, p=0.59). More additional treatments were required among the POT group (40.4% vs 6.9%, p<0.01). At one-year follow-up, only one patient in each group underwent target lesion revascularisation (2.0% vs 1.9%).

conclusionsPOT followed by side branch dilation did not show any advantages over conventional KBT in terms of stent apposition; however, excellent midterm clinical outcomes were observed in both strategies.

Indexed as

Angioplasty, Balloon, CoronaryCoronary Artery DiseaseCoronary AngiographyCoronary VesselsHumansStentsTreatment Outcome

Identifiers

PMID33775930
PMCPMC9724954

What OpenQuestion holds

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Registered trials

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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.