Experimental physiologyJul 11, 2026

How aging and risk factors contribute to irregular heartbeats in atrial fibrillation

Longevity & Aging Weekly Brief ↗PubMed ↗DOI ↗OA ↗

Updated Jul 14, 2026

Abstract

Weight loss of 10% or more when maintained is associated with reduced atrial fibrillation (AF) burden.

Atrial fibrillation prevalence increases with age due to irreversible changes and modifiable risk factors.
Age-related mechanisms include fibrosis, cellular aging, and mitochondrial dysfunction.
Comorbidities like obesity, hypertension, and diabetes contribute to atrial remodeling through various biological pathways.
Late gadolinium enhancement magnetic resonance imaging can quantify fibrosis, while circulating biomarkers monitor inflammation and disease activity.
Structured management of risk factors may lead to improved outcomes in AF treatment, including a shift from persistent to paroxysmal AF patterns.

Simplified

Atrial fibrillation (AF) prevalence rises sharply with age due to two independent mechanisms. Ageing produces irreversible arrhythmogenic substrate changes through progressive fibrosis, cellular senescence and mitochondrial dysfunction, while modifiable risk factors such as obesity, hypertension, sleep apnoea, diabetes and alcohol use promote atrial remodelling through inflammatory, haemodynamic and metabolic pathways. These comorbidities accumulate with age but operate through distinct mechanisms. Late gadolinium enhancement magnetic resonance imaging now quantifies fibrosis burden, while circulating biomarkers track inflammation, fibrosis and disease activity, and these measures respond to treatment, providing objective evidence of substrate modification. Landmark trials have transformed management. Weight loss of 10% or more when maintained is associated with reduced AF burden. Structured risk-factor management may improve ablation outcomes and is associated with regression of AF type, with some patients moving from persistent back to paroxysmal patterns. These benefits occur across age groups, preventing arrhythmogenic substrate formation in younger patients and likely enabling reduction in AF burden in older adults. Collectively, this evidence positions risk-factor management as the fourth pillar of AF care and shifts AF from an inevitable consequence of ageing to a modifiable chronic disease when delivered effectively.

Full Text

Full text is available at the source.

View Full Text ↗

How aging and risk factors contribute to irregular heartbeats in atrial fibrillation

Abstract

Full Text

You found one interesting study. We’ll send the next 7.

What Lands in Your Inbox Each Week:

Recent issues from the longevity & aging brief

Abstract

Full Text

Related papers

You found one interesting study. We’ll send the next 7.

What Lands in Your Inbox Each Week:

Recent issues from the longevity & aging brief