Abstract
Background
Posterior wall isolation (PWI) added to pulmonary vein isolation (PVI) is increasingly used in ablation for persistent atrial fibrillation (PeAF) despite limited evidence of clinical benefit. We investigated the 5-year outcomes of a PVI + PWI ablation strategy with mandatory repeat procedures in PeAF.
Methods
Twenty-four patients with PeAF participated in this single-arm prospective study and underwent radiofrequency ablation (RFA) with wide area circumferential ablation (WACA), roof, and inferior lines for PVI + PWI which was reinforced if required during mandated repeat procedures after 6 months. Then, patients were followed for 60 months using continuous heart rhythm monitoring by implanted cardiac monitors (ICM) and atrial fibrillation effect on quality-of-life scoring (AFEQT; range: 20–100 points) for the initial 30 months.
Results
ICM-verified cumulated AF recurrence was 54% after 30 months but the ensuing AF burden was only median 0‰ [0 to 4.8‰] overall and 1‰ [0 to 8 ‰] among patients with any recurrence. AFEQT scores increased from baseline 60 points [48 to 72] to 93 points [84 to 96] at repeat procedures P < 0.0001 and further to 96 points [93 to 99] P = 0.03 after 30 months. After 60 months, at least one episode of AF had been documented in 63% and two patients (8%) were in permanent AF.
Conclusion
Reinforced PVI + PWI was associated with low long-term AF burden and corresponding improvements in quality-of-life. Reinforced (or durable) PVI + PWI appears to be a promising strategy to treat PeAF.
Trial registration
ClinicalTrials.gov. Identifier: NCT05045131
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Data availability
All source data and calculations forming the basis of the conclusions in this work are available in anonymized form and will be provided by reasonable request to the corresponding author.
Abbreviations
- PeAF:
-
Persistent atrial fibrillation
- PVI :
-
Pulmonary vein isolation
- PWI:
-
Left atrial posterior wall isolation
- LA:
-
Left atrium
- WACA:
-
Wide area circumferential ablation
- ICM:
-
Implantable cardiac monitor
- AI:
-
Ablation index
- CRZ:
-
Center-right zone of the LA posterior wall
- IQR :
-
Interquartile range
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Funding
The study was mainly supported by the internal research fund of the department of cardiology, Gentofte Hospital. A grant from Biosense Webster Inc. covered a minor share of the required funding.
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The study was approved by the Danish National Science Ethics Committee (H15015153) and posted in a clinical trial database, www.clinicaltrials.gov (NCT05045131). All participants provided written informed consent.
Conflict of interests
Dr. Worck has received research grants and speaker honoraria from Biosense Webster. Dr. Sørensen has received research grants from Medtronic and Biosense Webster. Dr. Lock Hansen has received research grants from the Novo Nordisk Foundation and Dr. Hansen has received research grants and speaker honoraria from Medtronic, Biosense Webster, and Boston Scientific. Dr Johannesen, Dr. Ruwald, and Mr. Haugdal have nothing to disclose. There are no other potentially competing interests to declare.
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Worck, R., Sørensen, S.K., Johannessen, A. et al. Posterior wall isolation in persistent atrial fibrillation. Long-term outcomes of a repeat procedure strategy. J Interv Card Electrophysiol 66, 971–979 (2023). https://doi.org/10.1007/s10840-022-01402-x
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DOI: https://doi.org/10.1007/s10840-022-01402-x