Go to navigation Go to content

Foto Maria 002

On 1 September 2022, Maria Eriksson Svensson will take up the position of Director of Uppsala Clinical Research Center (UCR). She succeeds Jonas Oldgren, who in the spring moved on to a role as Secretary General for Clinical Research at the Swedish Research Council. Maria Eriksson Svensson is a professor and senior physician in renal medicine at Uppsala University and Uppsala University Hospital.

“I am now looking forward to leading the work at Uppsala Clinical Research Center (UCR)”, she says. “The UCR is a unique centre that combines all the clinical, academic and technical expertise needed to design and conduct innovative clinical trials, and I have worked with UCR in various roles, both as a medical director in the pharmaceutical industry and as an academic researcher. In my work, I engage and inspire employees to develop and innovate and seek to create a workplace culture where people ‘long’ for work. An important goal in the work ahead at UCR is to build smart and innovative project teams that become sought-after resources for exciting clinical research both regionally, nationally and internationally,” says Maria Eriksson Svensson. 

Maria Eriksson Svensson graduated as a physician and specialised in renal medicine and endocrinology/diabetology in Umeå, and at the same time, she obtained her PhD in diabetic kidney disease, later becoming a docent in Umeå as well. She has since worked in various roles in healthcare, academia, the pharmaceutical industry and government. In the autumn of 2020, she was recruited as a professor and senior consultant at Uppsala University and Uppsala University Hospital, coming most recently from a role as medical director in the pharmaceutical industry. Clinical research has always been a common thread throughout the years and has included studies on kidney disease, diabetes and cardiovascular disease, among others. A broad background in healthcare, academia, pharmaceutical industry and government has enabled several complex research projects. 

“I see this assignment as an exciting opportunity to lead and, in close collaboration with the steering committee at Uppsala University, Uppsala University Hospital and Region Uppsala, continue to develop the unique activities and expertise at UCR, and work to make research an integral part of healthcare. I also see increased collaboration with other actors in clinical research, both in Uppsala, in Sweden and internationally. In a rapidly changing world, with the development of complex medical techniques and treatments in, for example, precision medicine with new possibilities for data sources and data analysis methods, I hope that UCR will not only be a part of the development but also help to lead parts of it. In the past, I have had the privilege of interacting with researchers in many different specialities, from different research centres, from industry and from government agencies, both in Sweden and internationally. I now hope that this experience of clinical research, management and collaboration will be useful in my new role,” says Maria Eriksson Svensson.

Stefan James, Chief Physician and Professor of Cardiology and Scientific Leader for UCR, has been appointed acting executive director during the recruitment period for a new executive director for UCR.

During Stefan James leadership, UCR will continue our strive to continuously increase medical knowledge and improve health through research and quality monitoring, on behalf of both academia and industry.

On March 16, former director Jonas Oldgren took up the newly established position of Secretary General of Clinical Research at the Swedish Research Council. Jonas will, however, remain at his position as a clinical professor at Uppsala University and the University Hospital and will complete ongoing collaborations and continue to run clinical research projects at UCR and the Department of Medical Sciences.

If you have any questions: 
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Phone: 018-611 9500



New study from Uppsala, Hamilton, Canada, published in Circulation shows that biomarker-based ABC-AF-scores provide more reliable balancing of risk for stroke versus the risk of bleeding in patients with atrial fibrillation with and without treatment with oral anticoagulation.
(Circulation 2021 May 11;143(19):1863-1873)

What Is New?

  • The biomarker-based Age, Biomarkers, Clinical history (ABC) atrial fibrillation (AF) scores for the assessment of the risks of stroke, major bleeding, and death shows good discrimination of risk in patients with atrial fibrillation not receiving oral anticoagulation.

    In patients not receiving oral anticoagulation (as previously also shown in patients on oral anticoagulation), the ABC-AF scores were superior to clinical scoring systems such as CHA2DS2-VASc or HAS-BLED.
  • The ABC-AF-stroke and ABC-AF-bleeding scores were recalibrated for prediction of absolute event rates in the absence of oral anticoagulation.

What Are the Clinical Implications?

  • The biomarker-based ABC-AF scores are now validated in, and calibrated for, patients with atrial fibrillation both with and without oral anticoagulation, allowing estimation of the absolute risks of stroke, bleeding, and death with different antithrombotic regimens.

  • The ABC-AF scores can therefore provide improved decision support on optimal antithrombotic treatment of an individual patient with atrial fibrillation.

Figure1 ABC score

Atrial fibrillation is the most common cardiac arrhythmia that occurs in around 3 % of the population in high income countries. The prevalence increases substantially with increasing age and affects around 10 % of the population above 75 years of age. Atrial fibrillation is associated with an increased risk of stroke and death which can be reduced by oral anticoagulation, although at the cost of an increased risk of bleeding. Therefore, there is a need for individualization of treatment in order to balance the risk of stroke and risk of bleeding. During the last decade drs Ziad Hijazi, Johan Lindbäck, Jonas Oldgren, Agneta Siegbahn and Lars Wallentin and collaborators in Uppsala have shown that circulating biomarkers are more important for the prediction of risk of stroke, death and bleeding than information on clinical factors alone in patients with atrial fibrillation treated with oral anticoagulation.

During the last years the group has developed novel biomarker-based risk scores – the ABC-AF (Age, Biomarkers, Clinical history in patients with Atrial Fibrillation) scores for stroke, major bleeding, and death . These risk scores were shown to outperform traditional risk scores in patients receiving oral anticoagulation. In order to further refine their utility, the ABC-AF scores needed to be investigated and validated in patients not receiving oral anticoagulation in order to predict the effects of oral anticoagulation.

During the last year the Uppsala investigators have collaborated with a group from Hamilton in Canada to evaluate the biomarker-based ABC-AF-risk scores using data from two clinical trials including patients with atrial fibrillation treated with aspirin (n=3195) or aspirin and clopidogrel (n=1110) and not with oral anticoagulation. The results showed that the ABC-AF-stroke score yielded a c-index of 0.70 (95% CI, 0.67–0.73) in both the cohort of patients only on aspirin and in the cohort of all patients combined. The ABC-AF-bleeding score had a c-index of 0.76 (95% CI, 0.71–0.81) in the aspirin-only and 0.73 (95% CI, 0.69–0.77) in the combined cohort. Both scores were superior to risk scores recommended by current guidelines. The ABC-AF-death score yielded a c-index of 0.78 (95% CI, 0.76–0.80) in both cohorts. Calibrated for patients receiving oral anticoagulation, as expected the ABC-AF-stroke score underestimated, and the ABC-AF- bleeding score overestimated, the risk of events in patients treated with aspirin (or aspirin and clopidogrel). The original scores were recalibrated for prediction of absolute stroke and major bleeding risks in patients receiving these treatments in the absence of oral anticoagulation.

In conclusion, the biomarker-based ABC-AF scores showed better discrimination than traditional risk scores and were recalibrated for precise risk estimation in patients not receiving oral anticoagulation. Therefore, the ABC-AF scores can now provide improved decision support regarding the treatment of patients with AF.

If you want to read the whole article in CIRCULATION, click here

Jonas Oldgren
This email address is being protected from spambots. You need JavaScript enabled to view it.

Executive Director UCR
Professor Coagulation Research at Department of Medical Sciences
Uppsala University

Lars Wallentin
This email address is being protected from spambots. You need JavaScript enabled to view it.

Senior Professor Cardiology, UCR  
Department of Medical Sciences
Uppsala Universitet

Ziad Hijazi
This email address is being protected from spambots. You need JavaScript enabled to view it.

Associate Professor Cardiology, UCR 
Department of Medical Sciences
Uppsala Universitet

No mortality increase with paclitaxel-coated balloons and stents in peripheral arterial disease

An interim analysis from the Swedish Drug-Elution Trial in Peripheral Arterial Disease (SWEDEPAD) has now been presented. It shows that, for patients with lower limb occlusive arterial disease, paclitaxel-coated balloons and stents do not bring about the rise in mortality previously reported. The study, led by the University of Gothenburg and published in The New England Journal of Medicine (NEJM), is expected to resonate internationally.

Peripheral arterial disease (PAD) is common, especially in older people, and causes poor blood circulation. The condition entails stenoses or occlusions of the arteries in the leg. This often causes severe pain, ulcers, and a high risk for lower limb amputation.

The most common treatment is endovascular balloon dilatation, sometimes combined with insertion of stents, small metal-mesh tubes that reinforce the vessel wall and prevent elastic recoil. The procedure, using a catheter inserted into the femoral artery in the groin, is minimally invasive — that is, performed with the least possible surgical trauma to the body.

What the researchers did, as described in the current report, was to compare patients randomly assigned to undergo either dilation of the blood vessel with conventional devices, without any drug coating, or with the more expensive drug-coated devices, all of them using paclitaxel as coating agent. With data on approximately 2,300 patients included to date, the study is by far the largest of its kind in the world.

The finding, that mortality rates in the two different groups do not differ, is expected to be highly influential. The question of a possible increase in mortality among patients treated with paclitaxel coated balloons and stents has been a subject of lively debate in recent years.

Solution to clinical dilemma offered

In December 2018, a meta-analysis of all previous randomized studies was published by Dr Katsanos and co-workers. Surprisingly, the article reported increased mortality among patients who had received treatment with paclitaxel-eluting balloons and stents compared to control patients.

The use of these products then declined sharply all over the world and the U.S. Food and Drug Administration (FDA) was among the organizations that urged caution in using them. In the subsequent discussion, the 2018 results were called in question; but until now no randomized study sufficiently large to settle the matter has been carried out.

The first author of the NEJM article, and also chair of the steering group of this study, is Joakim Nordanstig, associate professor of vascular surgery at Sahlgrenska Academy, University of Gothenburg, and senior vascular surgeon at the Sahlgrenska University Hospital.

“We’re proud and pleased that we in this way were able to provide a solution to the tricky clinical dilemma that arose when long-term patient safety relating to the treatment with paclitaxel-coated balloons and stents was called into question,” Nordanstig says.

“Above all, our results are important for all the patients who are living with PAD and are facing a lower limb arterial procedure. Drug-eluting balloons and stents have been used widely around the world, and currently represent the most promising technique we have for preventing postoperative recurrence of stricture in the dilated artery. That kind of recurrent stricture is by far the most important limitation of invasive interventions in PAD, and it’s something that affects a lot of patients,” he continues.

“It’s also hugely gratifying that Swedish vascular surgery and interventional radiology, working really well together, have truly been able to help solve an international treatment dilemma. Our study is definitely a team effort, and all the vascular surgeons, interventional radiologists and vascular and radiology nurses in Sweden who’ve taken part can stand a bit taller today.”

Reassuring result: new patients to be included

The corresponding author, and also the principal investigator of SWEDEPAD, Mårten Falkenberg, professor of vascular interventions at Sahlgrenska Academy, adds that the study is funded mainly by the Swedish Research Council. It is carried out within the framework of Swedvasc (Sweden’s National Quality Registry for Vascular Surgery), which is administered by the Uppsala Clinical Research Center (UCR) at Uppsala University. UCR is where the study platform was developed and the data processing has taken place. Scientists at UCR have previously conducted several studies of a similar design, and the collaboration between the University of Gothenburg and UCR has been a success factor.

“It’s unusual for an interim analysis to be published in the world’s top-ranking medical journal. The reason for it is that, in all probability, our finding — although it’s a negative one and thus doesn’t demonstrate any differences between the treatment groups — solves a medical dilemma with major clinical and financial implications world-wide,” Falkenberg says.

“With this convincing and reassuring result, we’ve resumed our study, and a further 1,400 patients are now to be included. When it’s all complete, we expect to be able to show whether the new technique, using drug-eluting balloons and stents, improves the outcomes that are most important for patients with peripheral arterial disease; decreased amputation rate and improved quality of life, as this still remains to be proven”, Mårten Falkenberg concludes.

- SWEDEPAD is the first registry-based randomized study in the Swedvasc registry and with its 2300 patients is the, without comparison, the largest study done of balloon dilation in patients with narrowed blood vessels in the legs. The study has been planned to include twice as many patients and will continue to hopefully later also be able to show effects on eg risk of amputation and quality of life, says Stefan James, Professor at the Department of Medical Sciences, Cardiology and scientific leader at Uppsala Clinical Research center,

- The fact that the study is published in the world's most cited scientific journal in medicine shows once again that UCR - as a register center for Swedvasc and co-responsible for the implementation of the study SWEDEPAD - has quality registers and clinical research that is world-leading. This study directly affects the treatment of patients with vascular disease in Sweden and around the world, Stefan James concludes.

Title: Mortality with Paclitaxel-Coated Devices in Peripheral Artery Disease


Stefan James, senior professor i Kardiologi
Uppsala Kliniska Forskningscentrum och Institutionen för Medicinska Vetenskaper
Uppsala Universitet, Uppsala

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tel: 018-6119500 

We use cookies
Cookies make this site work properly. By continuing to use the site, you agree that we use cookies.