Key result
Pulmonary vein isolation significantly increased the first eigenvalue of P-wave loops (7600 vs 5800, p=0.0023) and decreased the roundness ratio (0.30 vs 0.35, p=0.0378).
Why the study?
Pulmonary vein isolation is a standard treatment for paroxysmal atrial fibrillation, but how it affects the electrical conduction pattern in the atria required analysis.
Does pulmonary vein isolation alter the electrical conduction pattern in the atria as measured by vectorcardiogram P-wave loops in patients with paroxysmal atrial fibrillation?
Observational (n=10)
No
Does pulmonary vein isolation alter the electrical conduction pattern in the atria as measured by vectorcardiogram P-wave loops in patients with paroxysmal atrial fibrillation?
Absolute Event Rate: 7600% vs 5800%
p-value: p=0.0023
Pulmonary vein isolation induces significant morphological changes in P-wave loops, making them more ellipsoidal, which reflects changes in the electrical propagation pattern in the atria.
Should not yet change ablation practice; leaves open whether P-wave loop metrics predict recurrence or refine PVI strategies in paroxysmal AF.
Pulmonary vein isolation (PVI) is considered a standard treatment of paroxysmal atrial fibrillation aiming to restore and maintain sinus rhythm. The purpose of this study is to analyse how the PVI treatment affects the electrical conduction pattern in the atria. We have compared the morphology of P wave loops extracted from the vectorcardiogram (VCG) before and after PVI.
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Ortigosa et al. (2020) conducted an observational in Paroxysmal atrial fibrillation (n=10). Pulmonary vein isolation vs. Before procedure (baseline) was evaluated on First eigenvalue (λ1) of P-wave loop (p=0.0023). Pulmonary vein isolation significantly increased the first eigenvalue of P-wave loops (7600 vs 5800, p=0.0023) and decreased the roundness ratio (0.30 vs 0.35, p=0.0378).
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