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Early versus Late Radiofrequency Catheter Ablation in Atrial Fibrillation: Timing Matters
Ahmad A A Farghaly1,2, Hussam Ali1, Pierpaolo Lupo1
1Arrhythmia & Electrophysiology Center, IRCCS MultiMedica, Sesto San Giovanni, 20099 Milan, Italy.
Insights
Early radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF) within one year of diagnosis improves outcomes. This approach reduces arrhythmia recurrence, hospitalizations, AF progression, and medication use compared to delayed ablation.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Atrial fibrillation (AF) is progressive, but optimal timing for radiofrequency catheter ablation (RFCA) remains unclear.
- Investigating early RFCA's impact on procedural outcomes is crucial for patient management.
Purpose of the Study:
- To assess the effect of early RFCA (within one year of AF diagnosis) on atrial arrhythmia recurrence and other clinical outcomes.
- To identify predictors of recurrence after RFCA.
Main Methods:
- Single-center retrospective study of 130 symptomatic AF patients undergoing RFCA.
- Patients stratified into early (≤1 year) and late (>1 year) diagnosis-to-ablation time (DAT) groups.
- Primary outcome: atrial arrhythmia recurrence; secondary outcomes: hospitalizations, AF progression, antiarrhythmic drug (AAD) use.
Main Results:
- Early RFCA (n=33) showed significantly lower recurrence rates (84.4% success) versus late RFCA (60.8% success, p=0.039).
- Early RFCA group had reduced cardiovascular hospitalizations (18% vs 42%, p=0.023), AF progression (0% vs 11.3%, p=0.044), and AAD use (45.4% vs 81.4%, p<0.001).
- Late DAT (>1 year) and blanking period recurrence predicted recurrence on multivariate analysis.
Conclusions:
- Performing RFCA within one year of AF diagnosis is linked to better outcomes, including reduced arrhythmia recurrence.
- Early intervention may prevent AF progression and decrease reliance on antiarrhythmic drugs.
- Diagnosis-to-ablation time is a key factor influencing RFCA success in AF patients.
Abstract:
Background: Despite the progressive course of atrial fibrillation (AF), the optimal timing of radiofrequency catheter ablation (RFCA) during disease course is still unknown. We aimed to investigate the impact of early RFCA within a year after AF diagnosis on procedural outcomes. Methods: A single-center retrospective study was conducted on symptomatic AF patients (n = 130) referred for RFCA with a 16-month median follow-up. Patients were stratified based on the diagnosis-to-ablation time (DAT) into early (≤1 year) and late (>1 year) RFCA groups. Atrial arrhythmia recurrence after single RFCA was the primary outcome. Secondary outcomes included cardiovascular hospitalizations, AF progression, and antiarrhythmic drug (AAD) use. Results: Within a year of AF diagnosis, 33 patients (25.4%) underwent RFCA. In the early-RFCA group, 84.4% of patients did not have recurrent atrial arrhythmia, in contrast to 60.8% in the late-RFCA group (p = 0.039). Late RFCA (HR = 2.74, 95% CI = 1.062-7.052, p = 0.037) and AF recurrence during the blanking period (HR = 4.57, 95% CI = 2.38-8.57, p < 0.0001) were independent predictors of atrial arrhythmia recurrence on multivariate analysis. Compared to the late-RFCA group, the early-RFCA group had significantly lower rates of cardiovascular hospitalizations (18% vs. 42%, p = 0.023), AF progression (0.0% vs. 11.3%, p = 0.044), and AAD use (45.4% vs. 81.4%, p < 0.001). Conclusions: Early RFCA within a year of AF diagnosis is associated with less atrial arrhythmia recurrence, fewer cardiovascular hospitalizations, less AF progression, and less AAD use. DAT of more than one year and AF recurrence during the blanking period are independent predictors of atrial arrhythmia recurrence after single RFCA.
