Key result
Cryoballoon ablation for atrial fibrillation was associated with an overall recurrence rate of approximately 37% after an average follow-up of 58.1 months, alongside low complication rates.
Why the study?
The study was conducted to evaluate the long-term efficacy and safety of cryoballoon ablation for atrial fibrillation.
Does cryoballoon ablation prevent atrial fibrillation recurrence in patients with atrial fibrillation?
Meta-Analysis
Does cryoballoon ablation prevent atrial fibrillation recurrence in patients with atrial fibrillation?
Cryoballoon ablation for atrial fibrillation demonstrates reasonable long-term success with a 37% recurrence rate at nearly 5 years and low rates of severe complications.
Answers are grounded in this paper and cite their sources.
Cryoballoon ablation yields ~63% long-term AF freedom with low severe complications; reinforces its durability for clinical use and supports extended guideline recommendations.
BACKGROUND: This meta-analysis evaluated long-term efficacy and safety of cryoballoon ablation (CB) of atrial fibrillation (AF). METHODS: PubMed, Cochrane Library, and Web of Science were searched until July 31, 2023, for published works investigating efficacy and safety of CB of AF in which mean/median follow-up time was not less than 36 months. Safety was assessed by adverse events. Efficacy was assessed by AF recurrence, defined as any atrial arrhythmias lasting more than 30 s. RESULTS: A total of 19 clinical studies were included. After an average of 58.1 months of follow-up, the overall AF recurrence rate was about 37%. The predictors of recurrence were duration of AF (HR 1.00; 95% CI [1.00 ∼ 1.01]), early recurrence of atrial fibrillation (HR 3.96; 95%CI [1.12 ∼ 14.02]), left atrial diameter (HR 1.04; 95%CI [1.02 ∼ 1.06]), and persistent AF (HR1.47; 95% CI [1.19 ∼ 1.82]). In terms of safety, the incidence of transient phrenic paralysis (PNP) was the highest, about 3%; followed by vascular complications (about 2%); pseudoaneurysm, permanent PNP, and all-cause death was (about 1%); and pericardial effusion and stroke / TIA was very low. CONCLUSION: CB is associated with low rates of severe complications and reasonable success rates.
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Song et al. (2023) conducted a meta-analysis in Atrial fibrillation. Cryoballoon ablation was evaluated on AF recurrence (any atrial arrhythmias lasting more than 30 s). Cryoballoon ablation for atrial fibrillation was associated with an overall recurrence rate of approximately 37% after an average follow-up of 58.1 months, alongside low complication rates.
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