Abstract
Purpose
The second-generation cryoballoon (CB-A, Arctic Front Advance, Medtronic, Minneapolis, MN, USA) has proven to be highly effective in achieving freedom from atrial fibrillation; nonetheless, the ideal number and duration of freezing cycles is still a matter of debate. We investigated the acute success, procedural complications, and clinical outcome of a single freeze strategy using the CB-A in a large, retrospective, international multicenter study.
Methods
Between January 2013 and September 2015, 818 consecutive patients (58 ± 12 years, 68% males) with drug-resistant atrial fibrillation (AF) who underwent a CB-A using a single freeze strategy were taken into consideration for our analysis.
Results
Paroxysmal AF was documented in 74.1% of the patients, while 25.9% presented with persistent AF. Additional freezes were needed in a mean 1.4 veins per patient. 0.2% of the patients experienced persistent PNP that was still documented at the last follow-up. After a median follow-up of 14 ± 8 months, taking into consideration a blanking period (BP) of 3 months, 692 patients (84.6%) were free from arrhythmia recurrence. After a single procedure, AF recurrence during BP and persistent AF were identified as predictors of clinical recurrence after BP.
Conclusions
Single freeze CB-A ablation is effective in treating drug-resistant AF and affords freedom from arrhythmia recurrences in 84.6% of patients during a 14-month follow-up. Persistent AF and recurrence during BP are predictors of arrhythmia recurrences.
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The protocol was carried out in accordance with the ethical principles for medical research involving human subjects established by the Helsinki declaration, protecting the privacy of all the participants as well as the confidentiality of their personal information. The study was approved by the local ethics committee.
Conflict of interest
CdA, PB, SI, AA, and GBC have received consulting fees and speaker honoraria from Medtronic.
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De Regibus, V., Iacopino, S., Abugattas, J.P. et al. Single freeze strategy with the second- generation cryballoon for atrial fibrillation: a multicenter international retrospective analysis in a large cohort of patients. J Interv Card Electrophysiol 49, 173–180 (2017). https://doi.org/10.1007/s10840-017-0254-6
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DOI: https://doi.org/10.1007/s10840-017-0254-6