Key result
Persistent AF links to smaller pulmonary vein sleeves, shorter ERPs, and higher pacing thresholds than paroxysmal AF.
Why the study?
The role of pulmonary veins as triggers in AF is well known, but their detailed electrophysiological properties had not been thoroughly examined.
Do the electrophysiological properties of the pulmonary veins differ between paroxysmal and persistent atrial fibrillation?
Population
41 patients with paroxysmal AF or persistent AF
Comparison
Paroxysmal AF vs persistent AF
Design
Observational comparative study
Authors
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PV differences by AF type are hypothesis-generating; prospective studies needed before clinical relevance.
Observational (n=41)
Do the electrophysiological properties of the pulmonary veins differ between paroxysmal and persistent atrial fibrillation?
Persistent AF is associated with decreased normal myocardial sleeves and shortened effective refractory periods in all pulmonary veins compared to paroxysmal AF, which may contribute to AF persistence.
Mori et al. (2023) conducted an observational in Paroxysmal and persistent atrial fibrillation (n=41). Persistent atrial fibrillation vs. Paroxysmal atrial fibrillation was evaluated on Area of the myocardial sleeves in the pulmonary veins, pacing threshold, and effective refractory period. Persistent atrial fibrillation was associated with significantly smaller pulmonary vein myocardial sleeves, shorter effective refractory periods, and higher pacing thresholds compared to paroxysmal AF.
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