Key result
Successful atrial fibrillation termination was associated with higher average total left atrial wall scar (16.4% vs 11.3%, P=0.004) and percent pulmonary vein antrum scar (66.2% vs 50.0%, P=0.01).
Why the study?
Does delayed-enhancement MRI accurately define scar lesions and correlate with clinical outcomes after atrial fibrillation ablation?
Population
144 patients who underwent atrial fibrillation ablation, including 18 patients with AF recurrence who…
Design
Cohort
Follow-up
3 months
Authors
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MRI scar metrics may predict AF termination; leaves open whether scar-targeted ablation improves outcomes.
Observational (n=144)
Does delayed-enhancement MRI accurately define scar lesions and correlate with clinical outcomes after atrial fibrillation ablation?
Absolute Event Rate: 16.4% vs 11.3%
p-value: p=0.004
Delayed-enhancement MRI can accurately define scar lesions after AF ablation, demonstrating that complete circumferential PV scarring is difficult to achieve but is associated with better clinical outcomes.
Badger et al. (2010) conducted an observational in Atrial fibrillation (n=144). Catheter ablation of atrial fibrillation vs. AF recurrence was evaluated on Average total left atrial wall scar (p=0.004). Successful atrial fibrillation termination was associated with higher average total left atrial wall scar (16.4% vs 11.3%, P=0.004) and percent pulmonary vein antrum scar (66.2% vs 50.0%, P=0.01).
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