GP · cardiovascular-health
Atrial fibrillation
Also known as AF · Paroxysmal atrial fibrillation · Permanent atrial fibrillation · Nonvalvular atrial fibrillation
GP-fellowship guide to atrial fibrillation: detection by pulse and ECG, the paroxysmal-to-permanent classification, reversible causes from alcohol to thyrotoxicosis and sepsis, CHA2DS2-VASc thresholds for anticoagulation with DOAC dose criteria per agent, lenient rate control (RACE II), early rhythm control (EAST-AFNET 4), cardioversion rules, and the elderly BAFTA evidence.
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Red flags
- New AF with hypotension, ischaemic chest pain, acute heart failure or reduced consciousness is unstable — urgent electrical cardioversion and hospital admission, not rate-control scripts
- AF with pre-excitation (wide, bizarre QRS) must never receive AV-nodal blockers — emergency referral
- Every new AF in sepsis carries doubled mortality risk — treat the trigger and document the stroke-risk assessment before discharge
- CHA2DS2-VASc of 1 or more in men or 2 or more in women means oral anticoagulation is indicated; a high HAS-BLED score flags modifiable factors, it never cancels a stroke indication
Overview
Atrial fibrillation is the most prevalent cardiac arrhythmia and carries substantial morbidity, mortality and economic burden. Its incidence and prevalence rise steeply with age, which makes general practice — where multimorbidity concentrates — the main arena of AF care. The 2023 ACC/AHA/ACCP/HRS guideline calls it the most sustained common arrhythmia.[23][22]
The disease kills through three routes: stroke (the most feared), tachycardia-induced cardiomyopathy, and symptom-driven deterioration. All three are preventable with systematic application of four levers — detection, anticoagulation, rate/rhythm control and risk-factor treatment. The 2024 ESC guidelines compress these into the AF-CARE pathway.[24][23]
AFFIRM set the twentieth-century default — rate control equals rhythm control — but EAST-AFNET 4 showed that early rhythm control within a year of diagnosis lowers cardiovascular death, stroke and heart-failure hospitalisation by roughly a fifth. The modern question is no longer whether to pursue sinus rhythm, but how early and by what means.[1][15]
References24ShowHide
- [1]Wyse DG et al. A comparison of rate control and rhythm control in patients with atrial fibrillation. N Engl J Med, 2002.PMID 12466506
- [2]Mant J et al. Warfarin versus aspirin for stroke prevention in an elderly community population with atrial fibrillation (the Birmingham Atrial Fibrillation Treatment of the Aged Study, BAFTA): a randomised controlled trial. Lancet, 2007.PMID 17693178
- [3]Connolly SJ et al. Dabigatran versus warfarin in patients with atrial fibrillation. N Engl J Med, 2009.PMID 19717844
- [4]Lip GY et al. Refining clinical risk stratification for predicting stroke and thromboembolism in atrial fibrillation using a novel risk factor-based approach: the euro heart survey on atrial fibrillation. Chest, 2010.PMID 19762550
- [5]Van Gelder IC et al. Lenient versus strict rate control in patients with atrial fibrillation. N Engl J Med, 2010.PMID 20231232
- [6]Pisters R et al. A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation: the Euro Heart Survey. Chest, 2010.PMID 20299623
- [7]Patel MR et al. Rivaroxaban versus warfarin in nonvalvular atrial fibrillation. N Engl J Med, 2011.PMID 21830957
- [8]Granger CB et al. Apixaban versus warfarin in patients with atrial fibrillation. N Engl J Med, 2011.PMID 21870978
- [9]Fox KA et al. Prevention of stroke and systemic embolism with rivaroxaban compared with warfarin in patients with non-valvular atrial fibrillation and moderate renal impairment. Eur Heart J, 2011.PMID 21873708
- [10]Pathak RK et al. Aggressive risk factor reduction study for atrial fibrillation and implications for the outcome of ablation: the ARREST-AF cohort study. J Am Coll Cardiol, 2014.PMID 25456757
- [11]Gallagher C et al. Alcohol and incident atrial fibrillation - A systematic review and meta-analysis. Int J Cardiol, 2017.PMID 28867013
- [12]Kanjanahattakij N et al. New-onset atrial fibrillation is associated with increased mortality in critically ill patients: a systematic review and meta-analysis. Acta Cardiol, 2019.PMID 29975173
- [13]Lowres N et al. Estimated stroke risk, yield, and number needed to screen for atrial fibrillation detected through single time screening: a multicountry patient-level meta-analysis of 141,220 screened individuals. PLoS Med, 2019.PMID 31553733
- [14]Zeitouni M et al. Clinical and Pharmacological Effects of Apixaban Dose Adjustment in the ARISTOTLE Trial. J Am Coll Cardiol, 2020.PMID 32164888
- [15]Kirchhof P et al. Early Rhythm-Control Therapy in Patients with Atrial Fibrillation. N Engl J Med, 2020.PMID 32865375
- [16]Andrade JG et al. Cryoablation or Drug Therapy for Initial Treatment of Atrial Fibrillation. N Engl J Med, 2021.PMID 33197159
- [17]Xiao FP et al. Outcomes of new-onset atrial fibrillation in patients with sepsis: A systematic review and meta-analysis of 225,841 patients. Am J Emerg Med, 2021.PMID 33429188
- [18]Svennberg E et al. Clinical outcomes in systematic screening for atrial fibrillation (STROKESTOP): a multicentre, parallel group, unmasked, randomised controlled trial. Lancet, 2021.PMID 34469764
- [19]Jiang H et al. Alcohol consumption and atrial fibrillation risk: An updated dose-response meta-analysis of over 10 million participants. Front Cardiovasc Med, 2022.PMID 36247447
- [20]Harrington J et al. Direct Oral Anticoagulants Versus Warfarin Across the Spectrum of Kidney Function: Patient-Level Network Meta-Analyses From COMBINE AF. Circulation, 2023.PMID 37042255
- [21]Bhattad PB et al. Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease. Cureus, 2023.PMID 37200647
- [22]Joglar JA et al. 2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. Circulation, 2024.PMID 38033089
- [23]Boriani G et al. The 2024 ESC guidelines on atrial fibrillation: essential updates for everyday clinical practice. Intern Emerg Med, 2025.PMID 40514614
- [24]Sato N Tachycardia-induced cardiomyopathy: evolution of the concept and contemporary insights. Heart Fail Rev, 2026.PMID 42412249