Atrial Fibrillation and Obesity
Atrial fibrillation is an irregular and often fast heartbeat that can cause palpitations, breathlessness and a higher risk of stroke.
Plain English
Patient-Friendly Explanation
Atrial fibrillation is an irregular and often fast heartbeat that can cause palpitations, breathlessness and a higher risk of stroke. Being overweight or obese is one of the strongest known risk factors for developing it, partly because extra fat enlarges and strains the upper chambers of the heart. Weight loss can reduce symptoms and may even help reverse the condition.
Medical
Clinical Definition
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia, and obesity is an independent, dose-dependent risk factor for its development. Excess adiposity promotes left atrial enlargement, epicardial fat deposition, diastolic dysfunction and autonomic remodelling, which together create an arrhythmogenic substrate. Sustained weight loss of 10 percent or more has been associated with reduced AF burden and, in some cohorts, arrhythmia-free survival without ablation.
Key Insight
Why It Matters
Because weight loss directly improves heart rhythm outcomes, managing weight is part of comprehensive care for patients with or at risk of atrial fibrillation. We coordinate with your cardiologist to support this.
Sources
Reviewed against standard medical references.
Medically reviewed by
Family Physician & Registered Acupuncturist, Accord Medical Clinic. MBBS (NUS), Graduate Diploma in Family Medicine (NUS), Graduate Diploma in Acupuncture (Singapore College of TCM).
Last reviewed: August 2026
This page is general health education, not medical advice. Whether any treatment is appropriate for you is a decision made in consultation after assessment.