Does pulsed field ablation work as well as radiofrequency ablation?
Pulsed field ablation (PFA) is a newer, nonthermal technique for treating paroxysmal atrial fibrillation (AF). Radiofrequency ablation (RFA) uses heat to create lesions. A large randomized trial directly comparing the two found that PFA is noninferior to RFA: after 12 months, about 77% of patients in both groups were free from atrial arrhythmia recurrence without needing repeat ablation or antiarrhythmic drugs 4. This suggests PFA works just as well as RFA for this condition.
What the research says
The BEAT PAROX-AF trial, a European multicenter randomized controlled trial, directly compared PFA and RFA in 289 patients with drug-resistant paroxysmal AF. At 12 months, the single-procedure success rate was 77.2% for PFA and 77.6% for RFA, a difference that was not statistically significant (adjusted difference 0.9%; 95% CI -8.2% to 10.1%; P = .84) 4. This means the two techniques had essentially identical efficacy. Procedure-related serious adverse events occurred in 3.4% of PFA patients versus 7.6% of RFA patients, a difference that did not reach statistical significance but suggests a possible safety advantage for PFA 4. No deaths, persistent phrenic nerve palsy, or strokes occurred in either group 4.
Real-world data from the EU-PORIA registry, which included 1,184 patients (62% with paroxysmal AF) who underwent PFA, found that among those who had a repeat procedure due to arrhythmia recurrence, 71% of pulmonary veins remained durably isolated 5. This supports that PFA produces lasting lesions. A subanalysis of the ADVENT trial compared autonomic effects of PFA versus thermal ablation (RFA or cryoballoon) in 379 paroxysmal AF patients. Thermal ablation led to greater increases in heart rate and changes in heart rate variability at 6 and 12 months, indicating more autonomic denervation, while PFA had minimal autonomic effects 6. The clinical significance of this difference is not yet clear, but it may affect long-term outcomes.
Other studies have examined RFA specifically. One study found that after RFA for paroxysmal AF, the 12-month sinus rhythm maintenance rate was 78.0% 3, similar to the rates seen in the BEAT PAROX-AF trial. Another study compared cryoballoon ablation to RFA and found that cryoballoon reduced the retention of pulmonary vein automaticity (a potential trigger for AF recurrence) compared to RFA 2. However, this does not directly compare PFA to RFA. A nurse-led lifestyle intervention after RFA was shown to improve quality of life and reduce AF recurrence 1, but this is about post-procedure care, not the ablation technique itself.
What to ask your doctor
- Based on my specific anatomy and health history, is pulsed field ablation a good option for me?
- What is your experience with pulsed field ablation compared to radiofrequency ablation?
- Are there any long-term outcome differences between PFA and RFA that I should consider?
- What are the potential risks and recovery times for each procedure?
- How does the cost or insurance coverage compare between PFA and RFA?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.