News archive

During the Christmas holidays, a freezer failure occurred in the Neo building on KI's Flemingsberg campus. The automatic filling of the cryotanks with liquid nitrogen was interrupted for an unknown reason. As a result, the temperature in 16 of 19 cryogenic tanks rose and large amounts of biological research material have been destroyed. An investigation with internal and external experts is now underway to find out how this failure could have happened.

We congratulate Daniel C Andersson, Johanna Lanner, Jon Lundberg, Carl Johan Sundberg, and Eddie Weitzberg, researchers at the Department of Physiology and Pharmacology (FyFa), for securing grants from the Swedish Heart Lung Foundation in 2023. In total SEK 5,9 million has been awarded the researchers at FyFa.

Researchers at Karolinska Institutet have evaluated the possibility of alerting drones equipped with automated external defibrillators (AED) to patients with suspected cardiac arrest. In more than half of the cases, the drones were ahead of the ambulance by an average of three minutes. In cases where the patient was in cardiac arrest, the drone-delivered defibrillator was used in a majority of cases. The results have been published in the journal The Lancet Digital Health.

The Swedish Society of Medicine (SLS) annually awards SEK 100,000 as a prize to a particularly deserving younger researcher who has applied for and been awarded SLS project grants. This year, the prize goes to Bahira Shahim, resident physician in cardiology and researcher at the Department of Medicine Solna.

Online cognitive behavioral therapy (CBT) shows promising effects on quality of life, as well as reduced healthcare consumption for patients with paroxysmal (i.e., intermittent) symptomatic atrial fibrillation, according to a new study in the Journal of the American College of Cardiology. According to the researchers, this is the world's first randomized controlled trial of CBT for patients with atrial fibrillation (AF).

In the largest survey to date, researchers at Karolinska Institutet have studied how diseases of the aortic valve affect prognosis in patients with various types of heart failure. The study was published in the European Journal of Heart Failure. Shared first authors are sisters Angiza and Bahira Shahim, who also presented the results of the study at the Heart Failure International Conference in Prague.

Researchers at Karolinska Institutet have investigated how preterm birth and foetal growth are related to the risk of atrial fibrillation up to middle-age. The study, which is published in JAMA Pediatrics, shows that being born preterm or large for gestational age was associated with increased risks of atrial fibrillation later in life. Being small for gestational age at birth was only associated with an increased risk of atrial fibrillation up to the age of 18.

The 5D Heart Patch Project, led by Prof Kenneth Chien, has identified human ventricular progenitor (HVP) cells that can create self-assembling heart grafts in vivo. The research has the potential to offer hope to millions of people suffering from heart failure.

A clinical study by researchers at Karolinska Institutet and Karolinska University Hospital shows that the hunger hormone ghrelin can increase the heart’s pump capacity in patients with heart failure. The results have been published in the European Heart Journal.

Karolinska Institutet has decided to make Wilhelmina Hoffman, specialist in geriatric medicine, and economist Fredrik Lundberg honorary doctors. The formal ceremony will take place in connection with the doctoral conferment ceremony at Stockholm City Hall on 12 May.

Patients with heart failure often suffer from co-morbidities, which places a great strain on the healthcare services, a multinational study published in Heart reports. The researchers, who are based at Karolinska Institutet, identify an urgent need to improve risk management of the disease.

High levels of uric acid in midlife may significantly raise the risk for a serious type of irregular heartbeat in the decades that follow, even in people without traditional risk factors, new research from Karolinska Institutet published in the Journal of the American Heart Association shows.

Losing too much weight when infected with COVID-19 has been linked to worse outcomes. Now, researchers at Karolinska Institutet have discovered that SARS-CoV-2 infection fuels blood vessel formation in fat tissues, thus revving up the body’s thermogenic metabolism. Blocking this process by using an existing drug curbed weight loss in mice and hamsters that were infected with the virus, according to the study published in the journal Nature Metabolism.

Volunteer so-called SMS lifesavers in Sweden, who are alerted to cardiac arrests nearby using a mobile app, perform a large part of life-saving efforts before the ambulance, police or emergency services arrive, regardless if they are instructed to collect the nearest defibrillator or not. This is according to a new study from Karolinska Institutet published in JAMA Cardiology.

Atrial fibrillation is the greatest risk factor for stroke. Screening to detect atrial fibrillation in older people would not only increase the chance of preventing stroke, it would also save money for the healthcare system and society, according to a study conducted at Linköping University and Karolinska Institutet, published in the European Heart Journal.

An observational study at Karolinska Institutet shows that babies suffering oxygen-deficiency complications at birth are almost twice as likely to develop cardiovascular disease during childhood and early adulthood as those without such complications. Still, the absolute risk of cardiovascular disease is very low in young age. The findings are published in the journal The Lancet Regional Health – Europe.

Adults with ADHD are at greater risk of developing a range of cardiovascular diseases than those without the condition, according to a large observational study led by researchers at Karolinska Institutet and Örebro University. The researchers say the findings, published in the journal World Psychiatry, underscore the need to monitor cardiovascular health in people with ADHD.

Professor Göran K. Hansson has been awarded the European Society of Cardiology's gold medal. He is honored for his research efforts and, above all, for his discoveries on the role of inflammation in cardiovascular disease. The gold medal is the society's premier award and is awarded for outstanding contributions to cardiovascular medicine and was awarded at the congress in Barcelona.

A study led by Karolinska Institutet shows that it often takes weeks for patients with heart failure to be prescribed the recommended treatments, especially relatively new drugs such as dapagliflozin and sacubitril/valsartan. According to the researchers, the results are troubling as these treatments reduce the risk of death and heart failure hospitalization, and improve the patients’ life quality. The study is published in the journal JACC: Heart Failure.

Researchers at Karolinska Institutet, Germany’s Technical University of Munich (TUM) and AstraZeneca, among others, have identified a unique therapeutic approach with the potential to restore heart function following a heart attack. The new findings rely on so-called human ventricular progenitor (HVP) cells to promote novel heart tissue and reduce scarring after injury. This pre-clinical study is published in the journal Nature Cell Biology.

Researchers at Karolinska Institutet have studied long-term morbidity and mortality in individuals who have had different models of biological heart valves implanted. The results, which show that there are considerable differences in performance depending on model group, are published in the journal JAMA Network Open.

Sweden is one of the few countries that have removed the dental health recommendation to give prophylactic antibiotics to people at a higher risk of infection of the heart valves, so-called infective endocarditis. Since the recommendation was removed in 2012, there has been no increase in this disease, a registry study from Karolinska Institutet published in the journal Clinical Infectious Diseases shows.

The risk of developing cardiovascular disease is strongly associated with the “bad” LDL cholesterol. A large study by scientists at Karolinska Institutet now shows that two proteins that transport cholesterol particles in the blood provide early and reliable risk information. The researchers advocate introducing new guidelines for detecting cardiac risk and say the results, published in PLOS Medicine, may pave the way for early treatment, which could help lower morbidity and fatality rates.

Socioeconomic factors affect the risk of cardiovascular disease and the chances of recovery. New research from Karolinska Institutet interrogates the significance of socioeconomic factors for sudden out-of-hospital cardiac arrest. The study, which is published in Circulation, shows that education and income impact survival rates in both men and women.

Kristina Haugaa is the new Professor of Cardiology at the Department of Medicine in Huddinge, since October 11. "I'm eager and thrilled to conduct cardiology research at Karolinska Institutet".

Researchers at Karolinska Institutet have examined long-term outcomes in patients who received pacemaker implantations after transcatheter aortic valve replacement through their groin. The result showed no significant difference in mortality for the patients with pacemakers compared to those without. The study is published in the journal JACC: Cardiovascular Interventions.

Screening for atrial fibrillation in 75- and 76-year-olds could reduce the risk of stroke, severe bleeding and death, according to a study at Karolinska Institutet in Sweden that has been published in the journal The Lancet.

Researchers at Karolinska Institutet in Sweden can now report the results of a unique pilot project where drones were used to deliver defibrillators to real-life alerts of suspected cardiac arrest. The drones were dispatched in more than a fifth of the emergencies and arrived on target and ahead of the ambulance in most cases. The results are published in the European Heart Journal and presented today at the European Society of Cardiology congress.

Researchers at Karolinska Institutet have identified eight primary factors that increase the risk of a common bleeding complication after heart attack. Some of these factors are already known, but using machine learning techniques, the researchers have found additional predictors, such as smoking, blood pressure and blood glucose.

In almost ten per cent of myocardial infarctions, no obvious cause in the coronary artery can be found. Some of the patients are diagnosed with broken-heart syndrome, while others are left without a diagnosis. A new study from Karolinska Institutet in Sweden suggests that early magnetic resonance (MR) imaging of the heart can greatly increase the rate of diagnosis. The study has been published in the journal JACC Cardiovascular Imaging.

Men with stable coronary artery disease who are on Viagra due to impotence seem to live longer and have a lower risk of experiencing a new heart attack, a study from Karolinska Institutet in Sweden published in the Journal of the American College of Cardiology reports.

Concerns have been raised that the use of a common group of medications called RAS inhibitors could facilitate SARS-CoV-2 infection, impact COVID-19 disease severity and worsen prognosis. However, in a new nationwide registry-based study from Karolinska Institutet, including almost 1.4 million patients, use of RAS inhibitors was not associated with increased risk of hospitalisation or death from COVID-19. The study has been published in the European Journal of Heart Failure.

The financial burden on health systems would drastically increase if new European expert guidelines for cholesterol-lowering treatment were implemented, according to a new simulation study by researchers at Karolinska Institutet in Sweden, published in the European Heart Journal. The findings highlight an urgent need for cost-effectiveness analysis given the current cost of the proposed treatment for very high-risk patients, the researchers say.

High levels of traffic exhaust at one’s residence increases the risk of stroke even in low-pollution environments, according to a study by researchers at Karolinska Institutet and other universities in Sweden. The study, published in the journal Environmental Health Perspectives, suggests that it is mainly black carbon from traffic exhaust that increases the risk for stroke, and not particulate matter from other sources.

Patients with a near relative that has experienced a myocardial infarction, has an over 60 % increased risk of also being afflicted when attending the emergency with chest pain. Researchers from Karolinska Institutet have observed this association by combining data in a completely new way. The results are published in European Heart Journal: Acute Cardiovascular Care.