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GP Topicscardiovascular-health

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.

high24 referencesUpdated 22 Aug 202612 min readVerification in progress

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Target exams

RACGP AKTRACGP KFPRACGP CCE

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
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Target exams

RACGP AKTRACGP KFPRACGP CCE

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
Key points
  • Atrial fibrillation is confirmed on ECG: irregularly irregular RR intervals with no discernible P waves. Take a pulse in every atypical presentation and follow any irregularity with an ECG.[22]
  • Stroke prevention dominates management. Anticoagulation is recommended at CHA2DS2-VASc of 2 or more in men and 3 or more in women, and should be considered at 1 and 2 respectively; DOACs beat warfarin and aspirin has no place.[23][2]
  • Rate control can be lenient — resting heart rate below 110 beats per minute is as effective as strict control (RACE II) and easier to achieve.[5]
  • Early rhythm control changes outcomes: EAST-AFNET 4 cut cardiovascular death, stroke or heart-hospitalisation by about one-fifth when rhythm control started within a year of diagnosis.[15]

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]

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References24ShowHide
  1. [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. [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. [3]Connolly SJ et al. Dabigatran versus warfarin in patients with atrial fibrillation. N Engl J Med, 2009.PMID 19717844
  4. [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. [5]Van Gelder IC et al. Lenient versus strict rate control in patients with atrial fibrillation. N Engl J Med, 2010.PMID 20231232
  6. [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. [7]Patel MR et al. Rivaroxaban versus warfarin in nonvalvular atrial fibrillation. N Engl J Med, 2011.PMID 21830957
  8. [8]Granger CB et al. Apixaban versus warfarin in patients with atrial fibrillation. N Engl J Med, 2011.PMID 21870978
  9. [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. [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. [11]Gallagher C et al. Alcohol and incident atrial fibrillation - A systematic review and meta-analysis. Int J Cardiol, 2017.PMID 28867013
  12. [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. [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. [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. [15]Kirchhof P et al. Early Rhythm-Control Therapy in Patients with Atrial Fibrillation. N Engl J Med, 2020.PMID 32865375
  16. [16]Andrade JG et al. Cryoablation or Drug Therapy for Initial Treatment of Atrial Fibrillation. N Engl J Med, 2021.PMID 33197159
  17. [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. [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. [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. [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. [21]Bhattad PB et al. Cardio-Thyrotoxicosis Syndrome: A Review of Thyrotoxic Cardiovascular Disease. Cureus, 2023.PMID 37200647
  22. [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. [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. [24]Sato N Tachycardia-induced cardiomyopathy: evolution of the concept and contemporary insights. Heart Fail Rev, 2026.PMID 42412249

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