Abstract
Purpose
The purpose of this study was to evaluate the feasibility and safety of superior vena cava (SVC) isolation in addition to standard pulmonary vein isolation (PVI) using the second-generation cryoballoon (CB) in patients with paroxysmal atrial fibrillation.
Methods
Thirty-seven consecutive patients that underwent CB ablation for paroxysmal atrial fibrillation (PAF) were prospectively enrolled in our study. After PVI the SVC was mapped for potentials. If the SVC exhibited electrical activity, isolation was achieved performing a single 180-s balloon application.
Results
Regarding SVC isolation, 180-s freeze in the SVC could be completed in 32 (86.4%) patients, and 5 patients had at least 120 s of freezing application (13.5%). Real-time recording during SVC isolation was observed in 30 (81.0%) patients. The mean time to isolation was 36.9 ± 28.7 s and the temperature at isolation was − 33 (− 15 to − 40) °C. No cases developed persistent phrenic nerve palsy (PNP) or any other complication.
Conclusions
Superior vena cava isolation proved to be safe and feasible with the second generation cryoballoon in a prospective series of patients affected by PAF.
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Abbreviations
- CMAPs:
-
Compound motor action potentials
- CI:
-
Confidence interval
- CB:
-
Cryoballoon
- ISNT:
-
Inappropriate sinus node tachycardia
- LA:
-
Left atrium
- PAF:
-
Paroxysmal atrial fibrillation
- PN:
-
Phrenic nerve
- PNP:
-
Phrenic nerve palsy
- PVI:
-
Pulmonary vein isolation
- RF:
-
Radiofrequency
- SVC:
-
Superior vena cava
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The study was approved by the ethical committee of Maria Cecilia Hospital, Cotignola. The protocol was carried out in accordance with the ethical principles for medical research involving human subjects established by the Declaration of Helsinki, protecting the privacy of all participants as well as the confidentiality of their personal information.
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Iacopino, S., Osório, T.G., Filannino, P. et al. Safety and feasibility of electrical isolation of the superior vena cava in addition to pulmonary vein ablation for paroxysmal atrial fibrillation using the cryoballoon: lessons from a prospective study. J Interv Card Electrophysiol 60, 255–260 (2021). https://doi.org/10.1007/s10840-020-00740-y
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DOI: https://doi.org/10.1007/s10840-020-00740-y