Key result
Very late recurrence of paroxysmal AF (>1 year post-ablation) was associated with a significantly higher incidence of right atrial foci compared to late recurrence (67% vs 3%, P<0.001).
Why the study?
Do the anatomical origins of atrial fibrillation foci differ between late and very late recurrences of paroxysmal atrial fibrillation after initial catheter ablation?
Population
50 consecutive patients with recurrence of paroxysmal atrial fibrillation after a first catheter ablation…
Comparison
Repeated electrophysiologic study and mapping vs Very late recurrence versus late recurrence
Design
Cohort
Authors
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May warrant right atrial evaluation in very late paroxysmal AF recurrences; leaves open whether timing-specific ablation strategies improve outcomes.
Observational (n=50)
Do the anatomical origins of atrial fibrillation foci differ between late and very late recurrences of paroxysmal atrial fibrillation after initial catheter ablation?
Absolute Event Rate: 67% vs 3%
p-value: p=<0.001
Right atrial foci play a major role in very late recurrences (>1 year) of paroxysmal AF after ablation, whereas left atrial and pulmonary vein foci dominate late recurrences (<1 year).
HSIEH et al. (2005) conducted an observational in Paroxysmal atrial fibrillation (n=50). Very late recurrence (>1 year post-ablation) vs. Late recurrence (<1 year post-ablation) was evaluated on Incidence of AF foci from the right atrium during repeated electrophysiologic study (p=<0.001). Very late recurrence of paroxysmal AF (>1 year post-ablation) was associated with a significantly higher incidence of right atrial foci compared to late recurrence (67% vs 3%, P<0.001).
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