Atrial Fibrillation News and Research

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Atrial fibrillation (AF) is the most common arrhythmia. An arrhythmia is a problem with the speed or rhythm of the heartbeat. A disorder in the heart’s electrical system causes AF and other types of arrhythmia. AF occurs when rapid, disorganized electrical signals in the heart’s two upper chambers, called the atria, cause them to contract very fast and irregularly (this is called fibrillation). As a result, blood pools in the atria and isn’t pumped completely into the heart’s two lower chambers, called the ventricles. When this happens, the heart’s upper and lower chambers don’t work together as they should. Often, people who have AF may not even feel symptoms. However, even when not noticed, AF can lead to an increased risk of stroke. In many patients, particularly when the rhythm is extremely rapid, AF can cause chest pain, heart attack, or heart failure. AF may occur rarely or every now and then, or it may become a persistent or permanent heart rhythm lasting for years.

New artificial intelligence model detects tissue damage in the heart

Researchers from the COR group at the Institute of Information and Communications Technologies (ITACA) of the Universitat Politècnica de València (UPV) have developed an artificial intelligence model capable of localizing and quantifying tissue abnormalities associated with atrial cardiomyopathy using electrical recordings from the body's surface.

28 Sep 2026

Stroke rates nearly doubled among younger adults over three decades

Stroke is becoming more common among younger adults, according to a study published September 23, 2026, in Neurology, the medical journal of the American Academy of Neurology.

23 Sep 2026

Why frailty and heart health may be more closely connected than we thought

A narrative review proposes cardiovascular frailty as a distinct phenotype that brings together blood pressure regulation, vascular aging, oxi-inflammaging, and clinical frailty deficits. The authors argue that a validated cardiovascular frailty index could support earlier detection and personalized care, although longitudinal studies are needed before the concept can be used clinically.

15 Sep 2026

Eye scans detect signs of atrial fibrillation years before diagnosis

People with atrial fibrillation have signs of the condition in the retinas of their eyes that can be detected as early as four years before diagnosis, finds a new study led by University College London (UCL) and Moorfields researchers.

14 Sep 2026

Nighttime light exposure may alter heart structure and function

Exposure to light during the nighttime is linked to important and potentially harmful changes to the structure and function of the heart, according to a study of more than 11,000 people published in the European Heart Journal today (Thursday).

10 Sep 2026

Too little or too much testosterone may matter for heart rhythm

A review of clinical trials, observational studies, genetic analyses, and mechanistic research suggests that atrial fibrillation risk may follow a U-shaped relationship with testosterone, increasing at both low and high levels. Evidence on testosterone replacement therapy remains mixed, with researchers calling for prospective studies to determine whether mid-physiological testosterone targets and treatment formulation influence AF risk.

2 Sep 2026

AI learned from cardiologists’ notes, and needed far less labeled ECG data

By teaching an AI system to connect raw heart signals with the clinical insights contained in cardiologists’ reports, researchers tested whether routine ECGs could reveal more with far fewer labeled examples.

2 Sep 2026

ECG-CLIP improves heart disease detection using less labeled data

Clinicians often use a medical test called a 12-lead electrocardiogram (ECG) to diagnose heart problems, which uses electrodes placed on the chest and limbs to record the heart's electrical activity.

1 Sep 2026

Left atrial appendage closure benefits only high-risk cardiac surgery patients

Results do not support routine closure of the left atrial appendage in all patients undergoing open-heart surgery but those at high stroke risk may benefit.

31 Aug 2026

Exercise intervention associated with reduced atrial fibrillation burden

An exercise program combining short-term supervision with long-term home-based exercise was associated with reduced atrial fibrillation burden and other meaningful benefits, according to results presented in a Hot Line session today at ESC Congress 2026.

31 Aug 2026

Catheter ablation reduces AF recurrence but not quality of life

Catheter ablation for atrial fibrillation (AF) did not significantly improve AF-related quality of life compared with a sham procedure, despite reducing AF recurrence.

30 Aug 2026

Milvexian fails to reduce cardiovascular events after acute coronary syndrome

Milvexian did not reduce major adverse cardiovascular events compared with placebo after a recent acute coronary syndrome and there was no increase in intracranial or fatal bleeding.

29 Aug 2026

Trial findings do not support prasugrel monotherapy at the time of primary PCI for STEMI patients

Monotherapy using prasugrel failed to show noninferiority compared with potent antiplatelet therapy plus aspirin at the time of primary percutaneous coronary intervention for ST-segment elevation myocardial infarction.

29 Aug 2026

Potent antiplatelet therapy increases bleeding risk after heart attack in AF patients

Potent antiplatelet therapy increased bleeding without signs of benefit regarding cardiovascular events in patients with atrial fibrillation after a heart attack.

29 Aug 2026

New findings do not support the use of edoxaban in AF patients after intracranial hemorrhage

Edoxaban did not reduce stroke or systemic embolism but increased major bleeding in high-risk patients with atrial fibrillation who had had an intracranial hemorrhage, according to results presented in a Hot Line session today at ESC Congress 2026.

29 Aug 2026

Oral anticoagulants benefit patients with atrial fibrillation at intermediate stroke risk

Oral anticoagulant therapy lowered the risk of adverse clinical events compared with no anticoagulation in patients with atrial fibrillation at intermediate stroke risk, according to results from the SINGLE-AF trial presented in a Hot Line session today at ESC Congress 2026 and published simultaneously in the New England Journal of Medicine.

28 Aug 2026

New international guidelines highlight the extensive benefits of cardiac rehabilitation

The European Society of Cardiology (ESC) Guidelines on cardiac rehabilitation have been published online today in the European Heart Journal.

28 Aug 2026

Blood-brain barrier-crossing blood pressure drugs linked to lower dementia risk

In a large Australian cohort of adults with hypertension, use of blood-brain barrier-crossing antihypertensive medications was associated with a lower risk of dementia and mortality than use of non-crossing drugs. The association was strongest for beta-blockers and angiotensin II receptor blockers, although the observational design means the findings cannot establish causality.

27 Aug 2026

The US switch in shingles vaccines revealed an unexpected heart health pattern

In a natural experiment involving 72,920 propensity-matched US adults aged 60 years and older, recombinant shingles vaccination was associated with a 9% lower cardiovascular disease burden over seven years compared with the live attenuated vaccine. Lower burdens of ischemic heart disease and heart failure were seen in both sexes, while ischemic stroke was significantly lower only among men, supporting further clinical trials and mechanistic studies

27 Aug 2026

Inhaled cannabis reduces premature heartbeats in habitual users

Habitual cannabis users experienced about 9% fewer premature heartbeats on days they inhaled cannabis compared with days they abstained, a counterintuitive finding that adds to the complex and evolving understanding of how cannabis affects the heart, new UC San Francisco-led research found.

12 Aug 2026