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Medium- and long-term outcome after a single second-generation cryoballoon ablation in patients with paroxysmal and persistent atrial fibrillation
To report medium- and long-term results following a single second-generation cryoballoon (CB2)-based ablation procedure in patients with paroxysmal (PAF) and persistent (PeAF) atrial fibrillation. A retrospective study was performed of consecutive patients undergoing a first CB2-based ablation proce...
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Published in: | Revista portuguesa de cardiologia (English ed.) 2019-12, Vol.38 (12), p.839-843 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | To report medium- and long-term results following a single second-generation cryoballoon (CB2)-based ablation procedure in patients with paroxysmal (PAF) and persistent (PeAF) atrial fibrillation.
A retrospective study was performed of consecutive patients undergoing a first CB2-based ablation procedure in a tertiary center. Cryoenergy was applied for 3 min if a time to effect 30 s beyond a three-month blanking period. The clinical impact of recurrences was classified using a severity score.
A total of 172 patients (134 PAF and 38 PeAF) were included, of whom 25 (14.5%) had structural heart disease and 120 (69.7%) had a normal or mildly dilated left atrium. Acute success was achieved in 167 (97.1%). After a median follow-up of 27 (14-41) months, 100 patients (58.1%) remained free of atrial arrhythmias (64.2% for PAF and 36.8% for PeAF, p=0.006). Left atrial size (p=0.05) and clinical presentation as PeAF (p=0.006) were predictors of recurrence. Of patients with recurrences, 11.1% did not require further therapies and an additional 16.7% had good control with antiarrhythmic drugs.
A single CB2 procedure resulted in 58.1% of patients remaining free of atrial arrhythmias at 27-month follow-up. Conservative management was useful in 27.8% of patients with recurrences.
Relatar os resultados a médio e longo prazo após um único procedimento de crioablação com um sistema de segunda geração (CB2) em doentes com fibrilhação auricular paroxística (PAF) e persistente (pAF).
Estudaram-se retrospetivamente doentes consecutivos referidos para uma primeira ablação com CB2 num centro terciário. A ablação foi efetuada com crioenergia aplicada durante 3 minutos se o tempo do efeito foi < 60 s, ou então foi aplicada durante 4 mim, com uma aplicação extra em caso de isolamento tardio ou temperatura subótima. Realizou-se o acompanhamento por meio do registo do sistema de saúde eletrónico regional e pelo telefone ou com entrevistas pessoais. A recorrência foi definida como qualquer arritmia auricular > 30 segundos depois dum período de três meses. O impacto clínico das recorrências foi classificado utilizando uma pontuação de gravidade.
Foram estudados 172 doentes (134 PAF e 38 pAF). Vinte cinco (14,5 |
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ISSN: | 2174-2049 2174-2049 |
DOI: | 10.1016/j.repce.2019.05.026 |