June 13, 2022EP Europace
Low-voltage area substrate modification for atrial fibrillation ablation: a systematic review and meta-analysis of clinical trials
Key result
Voltage-guided substrate modification improves freedom from arrhythmia by ~30% in persistent AF.
- RR 1.30
- 95% CI 1.03-1.64
- n=539
Why the study?
The value of additional ablation beyond pulmonary vein isolation for AF is unclear, especially for persistent AF, and the optimal substrate modification target remains uncertain.
Does voltage-guided substrate modification targeting low-voltage areas improve freedom from arrhythmia in patients undergoing catheter ablation for atrial fibrillation?
Population
539 AF patients undergoing catheter ablation across four randomized studies
Comparison
Voltage-guided substrate modification targeting LVA vs conventional ablation approaches not targeting LVA
Design
Systematic review and meta-analysis of randomized studies
Authors
Discussion
Loading...
Member takes
Implication
Supports voltage-guided substrate modification in persistent AF ablation; strengthens pooled randomized evidence for targeted strategies.
Key Points
- The aim is to evaluate the effectiveness of low-voltage area substrate modification in patients undergoing catheter ablation for atrial fibrillation.
- Systematic review and meta-analysis of randomized trials
- Comparison between low-voltage area group and non-low-voltage area group
- Risk of bias assessed using Cochrane tool with searches performed on Medline, Scopus, and Cochrane Central Register.
- Freedom from arrhythmia in persistent AF was greater in the LVA group (RR 1.30; 95% CI 1.03-1.64)
- No difference in freedom from arrhythmia in paroxysmal AF (RR 1.30; 95% CI 0.89-1.91)
- No significant differences in procedural time or complications between groups.
Study Design
Type
Meta-Analysis (n=539)
Structured PICO
Does voltage-guided substrate modification targeting low-voltage areas improve freedom from arrhythmia in patients undergoing catheter ablation for atrial fibrillation?
P
Population
539 patients (36% female) with atrial fibrillation (AF) undergoing catheter ablation, pooled from 4 randomized studies.
I
Intervention
Voltage-guided substrate modification targeting low-voltage area (LVA) during catheter ablation
C
Comparator
Conventional ablation approaches not targeting LVA
O
Outcome
Freedom from arrhythmia (FFA)hard clinical
Main Result
Effect estimate: RR 1.30 (95% CI 1.03-1.64)
Voltage-guided substrate modification targeting low-voltage areas during catheter ablation improves freedom from arrhythmia in patients with persistent, but not paroxysmal, atrial fibrillation.
Cite This Study
Junarta et al. (2022) conducted a meta-analysis in Atrial fibrillation (n=539). Voltage-guided substrate modification targeting low-voltage areas (LVA) vs. Conventional ablation approaches not targeting LVA was evaluated on Freedom from arrhythmia (FFA) in patients with persistent AF (RR 1.30, 95% CI 1.03-1.64). Voltage-guided substrate modification targeting low-voltage areas improved freedom from arrhythmia in patients with persistent atrial fibrillation (RR 1.30; 95% CI 1.03-1.64).