Key result
Left atrial low-voltage areas ≤3.3% linked to ~77% atrial tachyarrhythmia freedom post-PVI vs larger areas.
Why the study?
The study aimed to evaluate predictors of atrial tachyarrhythmia recurrence using structural and functional mapping—including voltage, dominant frequency, and rotor mapping—after pulmonary vein isolation in nonparoxysmal AF.
Does structural and functional mapping predict recurrence of atrial tachyarrhythmias in nonparoxysmal AF patients after pulmonary vein isolation?
Population
66 nonparoxysmal AF patients
Comparison
Voltage vs dominant frequency vs rotor mapping after PVI
Design
Prospective observational study
Follow-up
11.6 ± 0.8 months
Authors
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May aid post-PVI recurrence risk stratification in nonparoxysmal AF; leaves open whether LVA-targeted ablation improves outcomes.
Observational (n=66)
No
Does structural and functional mapping predict recurrence of atrial tachyarrhythmias in nonparoxysmal AF patients after pulmonary vein isolation?
Absolute Event Rate: 77.1% vs 33.3%
p-value: p=<0.001
Low-voltage areas, rather than dominant frequencies or rotors, are independent predictors of atrial tachyarrhythmia recurrence after pulmonary vein isolation in patients with nonparoxysmal atrial fibrillation.
Kumagai et al. (2021) conducted an observational in Nonparoxysmal atrial fibrillation (n=66). LVA/LA surface area ≤3.3% vs. LVA/LA surface area >3.3% was evaluated on Atrial tachyarrhythmia freedom (p=<0.001). Left atrial low-voltage areas ≤3.3% resulted in significantly greater atrial tachyarrhythmia freedom compared to areas >3.3% (77.1% vs 33.3%) after pulmonary vein isolation.
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