Are there differences in success rates between pulsed field and radiofrequency ablation?
For paroxysmal atrial fibrillation (AF), both pulsed field ablation (PFA) and radiofrequency ablation (RFA) are catheter-based procedures that isolate the pulmonary veins to stop abnormal electrical signals. Recent studies show that PFA and RFA have comparable success rates at 12 months, but they differ in some safety aspects and procedural details. Your doctor can help you weigh these differences based on your specific health profile.
What the research says
A 2024 randomized trial (BEAT PAROX-AF) directly compared PFA and RFA in 289 patients with paroxysmal AF. At 12 months, single-procedure success (no atrial arrhythmia recurrence) was 77.2% for PFA and 77.6% for RFA — a difference of less than 1%, which was not statistically significant 4. A meta-analysis of 18 studies (4998 patients) also found that PFA was associated with a lower treatment failure rate overall (odds ratio 0.83) compared to thermal ablation (which includes RFA and cryoballoon), but the difference was modest 5. Another randomized trial (InsightPFA) reported 12-month freedom from atrial tachyarrhythmia in 65.5% of PFA patients versus 68.3% of RFA patients, again not significantly different 6.
Safety profiles differ. The BEAT PAROX-AF trial found fewer procedure-related serious adverse events with PFA (3.4%) than with RFA (7.6%) 4. However, the meta-analysis noted that PFA had higher rates of cardiac tamponade (odds ratio 2.98) but lower rates of esophageal injury (odds ratio 0.17) 5. PFA also tends to have shorter procedure times but longer fluoroscopy times 5.
Other ablation technologies have been compared to RFA as well. For example, cryoballoon ablation (CBA) was shown to reduce the retention of pulmonary vein automaticity (a potential trigger for AF) compared to RFA in a small randomized study 2. However, the overall success rates for CBA and RFA are generally considered similar. The key point is that PFA and RFA appear to have comparable efficacy for paroxysmal AF, but their risk profiles differ, which may influence your choice.
What to ask your doctor
- Given my age and overall health, do you think PFA or RFA would be a better option for me?
- What is your experience with PFA? How many procedures have you performed?
- What are the specific risks I should consider for each procedure, especially regarding tamponade or esophageal injury?
- How do the procedure times and recovery compare between PFA and RFA at your center?
- Are there any long-term outcome data from your practice that might help me decide?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.