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05.11.2025 10:51

Studies confirm that drug-coated balloons can replace stents – even in larger coronary arteries

Claudia Ehrlich Pressestelle der Universität des Saarlandes
Universität des Saarlandes

In the treatment of larger narrowed blood vessels, drug-coated balloon catheters have been shown to deliver lasting and effective outcomes. Their minimally invasive nature makes them a viable alternative to stents. These findings, from a research team led by cardiologist Professor Bruno Scheller at Saarland University, have now been validated by an international study involving over 3,300 patients. The results were recently presented at TCT, the world’s largest conference on transcatheter cardiovascular therapeutics, held from 25 to 28 October in San Francisco, USA. Professor Scheller originally developed the method two decades ago and has continuously refined it through ongoing research.

When arterial plaque – a sticky combination of fatty deposits, calcified material, inflammatory cells and other substances – build up on the inner walls of coronary or other arteries, blood flow is restricted, which can lead to heart failure, heart attacks or strokes. Cardiovascular disease is still one of the most common causes of illness and death worldwide.

The drug-coated balloon (DCB) has become an internationally recognized treatment option. The procedure involves inserting a thin plastic tube into the affected vessel. The tube has a tiny balloon at its tip, which is then inflated to gently widen the vessel by stretching the vessel wall. What sets this method apart is that the balloon has a drug coating that is delivered deep into the vessel wall during inflation. ‘When a vessel is dilated using a standard balloon, it often narrows again due to excessive tissue growth following the intervention – a process known as “restenosis”. However, if a DCB is used, the drugs in the special coating are transferred into the walls of the artery, where they can remain active for weeks or months, effectively preventing re-narrowing of the vessel,’ explains Professor Bruno Scheller of Saarland University. The DCB technique – now one of the most widely recognized and effective therapies for treating narrowed arteries – was developed by Scheller together with Ulrich Speck, Professor Emeritus of Experimental Radiology at Charité Berlin.

Numerous clinical studies have already shown that drug-coated balloons are at least as effective, and in some cases superior, to drug-eluting stents in treating atherosclerosis in smaller vessels (up to 2.75 mm in diameter). The method has been used millions of times in clinical practice. In Asia in particular, DCB therapy has already replaced nearly half of all interventions where drug-eluting stents would previously have been used. Studies demonstrating the efficacy of DCBs in treating small coronary vessels have been published by Scheller and colleagues in leading journals such as The Lancet (Lancet. 2018 Sep 8; 392(10150): 849-856; Lancet. 2020 Nov 7; 396(10261): 1504-1510) and the European Heart Journal (Eur Heart J. 2025 May 2; 46(17): 1586-1599). An international expert group, the Academic Research Consortium (ARC), recently published treatment guidelines for DCBs in both the European Heart Journal (Eur Heart J. 2025 Jul 7; 46(26): 2498-2519) and the Journal of the American College of Cardiology, (J Am Coll Cardiol. 2025 Oct 14; 86(15): 1170-1202), with significant contributions in each case from Professor Scheller.

Now, a new international study (SELUTION DeNovo; Spaulding C. et al.) involving more than 3,300 patients has demonstrated that DCBs also offer a safe and effective means of treating coronary arteries with diameters larger than 2.75 mm, for which up until now stents have been the conventional treatment of choice. Stents are metal mesh tubes that are inserted into a narrowed or blocked blood vessel to act as a scaffold to keep it open. Until now, DCBs were primarily used in larger arteries by inserting the balloon into existing stents when these became blocked by new deposits.

But the SELUTION DeNovo study shows that DCBs also perform well in larger vessels. After one year, the rate of serious events such as sudden cardiac death, heart attack or the need for a repeat intervention was comparable to that observed with modern drug-eluting stents. ‘We know that drug-eluting stents are very safe. However, we also know that because the stent remains in the vessel, there is a risk of complications over the medium to long term,’ says Professor Scheller, who is Professor of Clinical and Experimental Interventional Cardiology at Saarland University and head of the Cardiac Catheterization Lab at Saarland University Medical Center in Homburg. ‘The advantage of drug-coated balloons is that they deliver medication locally without leaving a permanent implant behind in the vessel.’

The new study also qualifies the findings of the 2024 Chinese ‘Rec-Cagefree I’ study, which had suggested that stents were more effective than drug-coated balloons in treating larger vessels with uncomplicated stenoses (non-complex narrowing) over a two-year period, concluding that drug-coated balloons did not provide lasting efficacy in such cases. At the TCT conference in San Francisco, both the SELUTION DeNovo results and updated three-year data from Rec-Cagefree I study were presented. Professor Scheller discussed these findings with other leading global experts during one of the TCT main sessions.

‘The results of the Rec-Cagefree I study cannot be applied to our method,' says Scheller. After the original patent for DCBs expired, the Chinese researchers tested a coating that they developed themselves based on the original Charité patent by Professors Scheller and Speck. ‘Their coating differs significantly from ours, not least in terms of drug composition and particle size. The active ingredients used in the Chinese study do not remain in the vessel wall long enough, which makes long-term prevention of restenosis difficult to achieve,’ explains Scheller. He and other authors have outlined their critique in a letter to the editor published in The Lancet (Lancet. 2025 Oct 25; 406(10514): 1950-1951)*.

‘In addition to comparing different technologies for treating coronary artery disease, my team and I are focused on developing new strategies tailored to individual patient needs,’ says Bruno Scheller. ‘For many patients, a combination of drug-eluting stents and drug-coated balloons DCBs will remain the best option. DCBs allows us to avoid long stent lengths, which can pose significant risks to patients over the medium to long term.'

‘The new data presented at the TCT conference supports our long-standing approach to interventional vascular therapy. We want to treat patients using as few permanent implants as possible,’ says Scheller. His research group in Homburg is a global leader in conducting experimental and clinical research in this field. Professor Scheller is also the global lead for some of the international clinical trials on DCBs that are currently underway in Homburg, with partners from Europe, Asia and the USA.

A short profile of Professor Bruno Scheller

Research on drug-coated balloons

In the late 1990s, Bruno Scheller began collaborating with Professor Ulrich Speck of the Charité Hospital in Berlin on a coating process for balloon catheters, which at the time were already in therapeutic use. ‘We found that restenosis could be prevented without the need for prolonged drug release into the vessel. Our results showed that it was sufficient for the drug to be administered over a much shorter period,’ explains Bruno Scheller, whose research at Saarland University's medical campus in Homburg focuses on improving heart attack treatments and other catheter-based therapies. Scheller's research is directly informed by his many years of practical experience as an interventional cardiologist at Saarland University Medical Center. The first clinical trials with a balloon catheter coated with the drug paclitaxel and a number of other additives were carried out in Homburg in 2003. Ulrich Speck and Bruno Scheller published their initial results in 2006 in the New England Journal of Medicine. Today, the method is now a standard approach to treating femoral artery disease and is used for long-segment lesions in lower leg arteries and narrowed dialysis access points (‘shunts’).

Research at Saarland University

Bruno Scheller and his team at the medical campus in Homburg are continuing to refine DCB technology, developing specialized balloons, new applications and alternative drug coatings. Scheller is also researching ways to prevent micro-tears in the vessel lining – a potential side effect of conventional balloon angioplasty. In recent years, his research group has published a number of groundbreaking studies in journals such as The Lancet.

Awards

Bruno Scheller has received numerous accolades for his pioneering research and development work that is ‘helping to shape the future of cardiovascular care worldwide.’ These include the 2024 Clinical Research Excellence Award in London in 2024 and, in 2021, the Award of Excellence and Innovation in Interventional Radiology from CIRSE – the Cardiovascular and Interventional Radiological Society of Europe. Over a ten-year period, his professorship received a total of around €1.1 million in funding from the Stifterverband für die Deutsche Wissenschaft – a key funding organization within the German higher education landscape.

The TCT Conference is the annual scientific symposium of the Cardiovascular Research Foundation (CRF) and the world’s foremost educational forum specializing in interventional cardiovascular medicine. https://www.tctconference.com/

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Wissenschaftliche Ansprechpartner:

Prof. Dr. Bruno Scheller:
Tel.: +49 6841 1615000; Email: bruno.scheller(at)uks.eu

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Originalpublikation:

The SELUTION DeNovo study
Spaulding C., on behalf of the SELUTION DeNovo investigators One-year results of the SELUTION DeNovo trial comparing a strategy of PCI with a sirolimus-eluting balloon and provisional stenting versus systematic DES implantation to treat de novo coronary lesions. Presented at: TCT 2025. 26 October 2025. San Francisco, CA, USA.

Bruno Scheller and others have published their assessment of the 2024 study ‘Rec-Cagefree I’ in a recent letter to the editor of The Lancet. (Lancet. 2025 Oct 25; 406(10514): 1950-1951)
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(25)01860-4/fullt...
* Please note: Letters published in the Correspondence section represent the views of the authors and not necessarily the views of The Lancet journals. Letters to the Editor are not normally externally peer reviewed.

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Bruno Scheller's research benefits from his many years of practical experience as a clinical cardiol ...
Quelle: Rüdiger Koop
Copyright: Saarland University

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Professor Bruno Scheller
Quelle: Rüdiger Koop
Copyright: Saarland University

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