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AF Ablation Success Rates — EECC MCQ

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ModerateArrhythmia & ElectrophysiologyAF Ablation Success RatesEECC

A 68-year-old man with persistent AF undergoes his first catheter ablation (wide-area circumferential PVI). What is the expected single-procedure success rate for maintaining sinus rhythm at 12 months?

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Correct answer: A — Approximately 60-75% for paroxysmal AF and 50-65% for persistent AF, with higher success rates after redo procedures; freedom from AF increases with each repeat procedure

Catheter ablation for AF (primarily PVI) has well-established efficacy data. Single-procedure success rates (freedom from AF/atrial tachycardia at 12 months off antiarrhythmic drugs) are approximately: paroxysmal AF 60-80%, persistent AF 50-65%, long-standing persistent AF 40-50%. Factors favouring success: shorter AF duration, smaller LA, absence of significant structural heart disease, younger age. Redo procedures (typically for PV reconnection or non-PV triggers) improve cumulative success to 75-90% for paroxysmal AF. The 2024 ESC AF Guidelines recommend discussing realistic expectations with patients: ablation reduces AF burden significantly but may not eliminate all AF episodes, and repeat procedures may be needed. Pulsed field ablation (PFA) may improve single-procedure success through more durable PV isolation.

Reference: ESC (2024): AF Guidelines