Hybrid-Convergent Procedure or Pulsed Field Ablation in Long-Standing Persistent Atrial Fibrillation.

BACKGROUND

Hybrid-convergent radiofrequency (RF) ablation targeting pulmonary veins (PVs) and left atrial posterior wall (LAPW) has shown better arrhythmic outcomes than an endocardial-only RF strategy, despite higher rates of complications. Comparisons with extensive pulsed field ablation (PFA) are currently lacking.

OBJECTIVES

This study aimed to compare the efficacy and safety of the hybrid-convergent RF vs PFA of PVs and LAPW in long-standing persistent atrial fibrillation (LSPAF).

METHODS

Ninety-three consecutive LSPAF patients, treated with 2-step hybrid-convergent RF ablation (hybrid group, n = 49) or with PFA of PVs and LAPW (PFA group, n = 44) were enrolled. Primary efficacy endpoint was defined as any atrial tachyarrhythmias (ATA) recurrence after the 3-month blanking period, over a follow-up time of 12 months. Periprocedural adverse events and late complications during follow-up were deemed primary safety outcomes.

RESULTS

The hybrid and PFA groups had similar baseline characteristics; mean age was hybrid 63.8 ± 10.6 years vs PFA 66.0 ± 7.4 years; P = 0.105. PV and LAPW ablation were acutely successful in all patients. Step 1 hybrid-epicardial procedures were longer than PFA (166 [Q1-Q3: 140-205] minutes vs 107.5 [Q1-Q3: 82.5-12] minutes; P < 0.01). At 12-month follow-up, there was no difference in ATA recurrences between groups (hybrid 36.7% vs PFA 40.9%; P = 0.680; log-rank at survival analysis P = 0.539). After adjusting for confounders, a larger left atrial volume and recurrences during the blanking-period were predictors of ATA recurrences after ablation, regardless of procedural technique employed. PFA showed a better safety profile with a lower rate of major periprocedural complications compared with hybrid ablation (12% vs 0%; P = 0.028).

CONCLUSIONS

Hybrid-convergent and PFA share comparable arrhythmic outcomes in LSPAF, but hybrid-convergent ablation carries higher periprocedural risks.