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.

Both low and high heart rates linked to stroke risk

A new study presented today at the European Stroke Organisation Conference (ESOC) 2026 suggests that both very low and very high resting heart rates are linked with an increased risk of stroke.

5 May 2026

New genetic risk report reveals hidden heart disease risk before symptoms appear

Researchers developed and externally validated integrated polygenic risk scores for eight cardiovascular conditions using large U.S.-based biobank data. The clinically orderable report may help identify inherited cardiovascular risk that traditional clinical markers can miss, although broader prospective validation is still needed.

30 Apr 2026

New genetic risk test estimates inherited risk for cardiovascular conditions

Researchers at Mass General Brigham Heart and Vascular Institute and collaborators have developed and validated a new genetic risk test that can estimate a person's inherited risk for eight common cardiovascular conditions, offering a more comprehensive approach to prevention.

29 Apr 2026

New scientific statement defines brain health across life

Brain health isn't determined only by genetics or what happens later in life. A growing body of research shows that a range of factors-from mental health and sleep to environment, lifestyle and social conditions-play a powerful role in shaping how the brain functions and ages.

28 Apr 2026

Ablation can lead to better outcomes for patients with advanced atrial fibrillation

A minimally invasive heart procedure may be a better first-line treatment than medication for people living with advanced forms of atrial fibrillation, according to a major international clinical trial led by researchers at the University of British Columbia.

27 Apr 2026

Severe strokes significantly increase the risk of progressive dementia

As stroke severity increases, the risk of progressive cognitive decline and dementia substantially escalates, according to a national study led by Michigan Medicine researchers.

23 Apr 2026

Transcatheter valve replacement helps patients with limited heart care options

Findings from the AltaValve™ Early Feasibility Study suggest that patients with a leaky mitral valve have sustained clinical benefits one year following atrial fixation Transcatheter Mitral Valve Replacement (TMVR).

23 Apr 2026

Screening-detected atrial fibrillation linked to threefold heart failure risk

Heart failure is common in people who have atrial fibrillation detected during screening, according to a presentation today at EHRA 2026 the annual congress of the European Heart Rhythm Association (EHRA), a branch of the European Society of Cardiology (ESC).

13 Apr 2026

More steps cut chronic disease risk but cannot fully undo long sitting

Research shows higher daily step counts can mitigate risks of chronic diseases linked to prolonged sitting, emphasizing the need to reduce sedentary time.

10 Apr 2026

American Heart Association's 9 diet rules to lower heart disease risk

The AHA's dietary guidance emphasizes food choices over fad diets to reduce heart disease risk and improve cardiovascular health across all life stages.

2 Apr 2026

Experts unveil new imaging standards for heart procedures

The global community of heart rhythm specialists will unite in Paris from 12 to 14 April 2026 for EHRA 2026, the annual congress of the European Heart Rhythm Association (EHRA), a branch of the European Society of Cardiology (ESC).

1 Apr 2026

What happens when more of your exercise is vigorous instead of moderate?

In a large UK Biobank analysis, a higher proportion of vigorous physical activity relative to total activity volume was associated with lower risks of eight major chronic diseases and all-cause mortality, even after accounting for overall activity volume. Device-based data suggested that activity intensity generally offered greater preventive potential than total volume alone across most outcomes.

31 Mar 2026

Study links atrial fibrillation to poorer brain clearance and cognitive decline

Researchers found that people with atrial fibrillation had lower MRI-based glymphatic activity and poorer cognitive performance than healthy controls, with the greatest impairment seen in non-paroxysmal AF. In patients who underwent catheter ablation, glymphatic activity improved after sinus rhythm was restored, suggesting a possible link between heart rhythm, brain waste clearance, and cognition.

30 Mar 2026

Digoxin found safe to use in young patients with rheumatic heart disease

Patients with rheumatic heart disease who took the heart failure drug digoxin were 18% less likely to die or experience new-onset or worsening heart failure during a two-year follow-up compared with those who received a placebo, according to a study presented at the American College of Cardiology's Annual Scientific Session (ACC.26).

30 Mar 2026

Discontinuing beta-blockers after heart attack found to be safe for low-risk patients

Among stable, relatively low-risk patients who had previously suffered a heart attack, discontinuing beta-blockers after at least one year was found to be non-inferior, or comparable, to continuing beta-blockers in terms of death, another heart attack or hospitalization for heart failure, according to a study presented at the American College of Cardiology's Annual Scientific Session.

30 Mar 2026

New clinical guideline adopts holistic approach to brain and heart health

A new brain–heart clinical practice guideline takes a holistic approach, integrating neurologic and mental health evidence with guidance for cardiovascular disease as many brain and heart conditions overlap and share similar risk factors.

30 Mar 2026

Transcatheter valve-in-valve procedure improves short-term outcomes in high-risk patients

In patients with a poorly functioning bioprosthetic mitral valve in the heart, a minimally invasive procedure to insert a new valve was associated with a lower rate of death or disabling stroke within one year, compared with patients who underwent standard repeat mitral valve replacement surgery, according to a study presented at the American College of Cardiology's Annual Scientific Session (ACC.26).

29 Mar 2026

Minimally invasive valve repair lowers hospitalizations in heart failure patients

At two years of follow-up, patients with a poorly functioning tricuspid valve in the heart who received optimal medical therapy plus a minimally invasive procedure using a clip to repair the valve were significantly less likely to die, have a heart attack or stroke and 40% less likely to be hospitalized for heart failure compared with similar patients who were randomly assigned to optimal medical therapy alone.

29 Mar 2026

Left atrial appendage closure matches anticoagulants in AFib patients

For patients with non-valvular atrial fibrillation (AFib) who had no contraindications to taking oral anticoagulants, the use of a device to close off the left atrial appendage in the heart—a small pouch where blood can pool and form dangerous clots—was comparable to standard medication therapy in reducing the combined rate of all-cause stroke, cardiovascular death and systemic embolism at three years.

28 Mar 2026

Heart failure and atrial fibrillation share underlying genetic and molecular mechanisms

New research published in Nature Cardiovascular Research reveals that heart failure and atrial fibrillation share underlying genetic and molecular mechanisms, suggesting that the two cardiovascular conditions may be less distinct than previously thought.

26 Mar 2026