A 55-year-old woman with paroxysmal atrial fibrillation (CHA2DS2-VASc score 3: female sex, hypertension, age 65) is being considered for catheter ablation. After successful ablation, when can anticoagulation be stopped according to current ESC 2020 AF guidelines?
- A Anticoagulation can be stopped 3 months after successful ablation if the patient has been in sinus rhythm
- B Anticoagulation is stopped at 6 months post-ablation if Holter monitoring confirms sinus rhythm
- C Anticoagulation decisions are based on underlying stroke risk (CHA2DS2-VASc score), not ablation success; this patient's score ≥ 2 mandates continued anticoagulation regardless of rhythm ✓
- D Anticoagulation may be stopped after 1 year of continuous sinus rhythm post-ablation
Correct answer: C. Anticoagulation decisions are based on underlying stroke risk (CHA2DS2-VASc score), not ablation success; this patient's score ≥ 2 mandates continued anticoagulation regardless of rhythm
Explanation
The ESC 2020 AF guidelines explicitly state that the decision to continue anticoagulation after catheter ablation should be based on the patient's CHA2DS2-VASc stroke risk score, not on the apparent success of ablation. Subclinical AF recurrences may go undetected by standard monitoring. This patient with CHA2DS2-VASc ≥ 2 should continue anticoagulation indefinitely regardless of ablation success. Ablation reduces AF burden and symptoms but does not eliminate thromboembolic risk.
Reference: Harrison's Principles of Internal Medicine, 21st ed.
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Written and medically reviewed by the StethoPrep medical team.