Key result
Interatrial epicardial connection linked to a strong ~0.84 dominant frequency correlation between RtPV and RAA.
Why the study?
An epicardial connection between the right-sided pulmonary venous carina and right atrium may preclude pulmonary vein isolation, but its electrophysiological role during atrial fibrillation remains unknown.
Does the presence of interatrial epicardial connections affect the dominant frequency of atrial fibrillation?
Observational
Does the presence of interatrial epicardial connections affect the dominant frequency of atrial fibrillation?
Answers are grounded in this paper and cite their sources.
Interatrial epicardial connections correlate with synchronized dominant frequencies between the right pulmonary vein antrum and right atrial appendage, potentially contributing to advanced electrical remodeling in atrial fibrillation.
BACKGROUND: An epicardial connection (EC) between the right-sided pulmonary venous (RtPV) carina and right atrium (RA) may preclude PV isolation, but its electrophysiological role during atrial fibrillation (AF) remains unknown. METHODS AND RESULTS: was significantly higher than that at the RAA (5.8±0.6 vs. 6.1±0.5 Hz, P=0.001) in the non-EC group, suggesting an LA-to-RA DF gradient. A significant correlation of DF between the RtPV antrum and RAA was observed in the EC group (P<0.001, r=0.84) but not in the non-EC group. CONCLUSIONS: An electrophysiological link via interatrial ECs might attenuate the hierarchical nature of activation frequencies of AF, leading to advanced electrical remodeling of the atria.
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Hasebe et al. (2023) conducted an observational in Atrial fibrillation. Epicardial connection (EC) between the right-sided pulmonary venous carina and right atrium vs. Non-EC group was evaluated on Dominant frequency (DF) correlation between the RtPV antrum and RAA (r=0.84, p=<0.001). An interatrial epicardial connection was associated with a significant correlation of dominant frequency between the right-sided pulmonary venous antrum and right atrium (r=0.84, P<0.001).
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