A new analysis of a clinical trial looked at whether completely ablating low-voltage areas (LVA) in the left atrium improves outcomes for people with persistent atrial fibrillation (AF). The study included 341 patients who had already undergone pulmonary vein isolation. Researchers compared those who received complete LVA ablation to those who had no LVA ablation.
The main finding: there was no significant difference in freedom from AF or atrial tachycardia recurrence between the two groups. This was true even after adjusting for patient differences using propensity score matching. The results suggest that adding complete LVA ablation does not provide extra benefit over pulmonary vein isolation alone.
Because this is a post hoc subanalysis, the findings are considered exploratory and not definitive. The study did not report on safety or side effects. The authors note that leaving LVA ablation incomplete to avoid complications appears reasonable.
For now, patients with persistent AF should discuss their treatment options with their doctor. This analysis does not change current practice, but it suggests that more ablation may not always be better.
