Cited by 275Atrial Fibrillation Management and OutcomesCardiac Arrhythmias and TreatmentsCardiac pacing and defibrillation studies

Cryoballoon Versus Open Irrigated Radiofrequency Ablation in Patients With Paroxysmal Atrial Fibrillation: The Prospective, Randomized, Controlled, Noninferiority FreezeAF Study

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Luik, Armin, Radzewitz, Andrea, Kieser, Meinhard, Walter, Marlene, Bramlage, Peter, Hörmann, Patrick, Schmidt, Kerstin, Horn, Nicolas +6 more·2015·Circulation

Abstract

BACKGROUND: There is a lack of data on the comparative efficacy and procedural safety of open irrigated radiofrequency (RF) and cryoballoon catheter (CB) ablation for pulmonary vein isolation in patients with paroxysmal atrial fibrillation. METHODS AND RESULTS: In a prospective, noninferiority study, 315 patients were randomly assigned to RF (n=159) or CB (n=156) ablation. The primary end point was freedom from atrial arrhythmia with absence of persistent complications. Patients were largely comparable between groups with more vascular disease in the RF group (8.2% versus 2.6% for CB; P=0.028). The primary end point at 12 months was achieved by 70.7% with RF and 73.6% with CB (multiple procedure success), including 31 redo procedures in each group (19.5% of RF versus 19.9% of CB; P=0.933). For the intention-to-treat population, noninferiority of CB was revealed for the predefined inferiority margin (risk difference, 0.029; 95% confidence interval, -0.074 to 0.132; P<0.001). Rates at 6 months were 63.1% and 64.1% for the RF and CB groups (single procedure success), and noninferiority was confirmed (risk difference, 0.010; 95% confidence interval, -0.097 to 0.116; P=0.002). Periprocedural complications for the index procedure were more frequent in the CB group (5.0% RF, 12.2% CB; P=0.022) with a significant difference in phrenic nerve palsies (0% RF, 5.8% CB; P=0.002). CONCLUSION: This large, prospective, randomized, controlled study demonstrates noninferiority of CB ablation versus RF ablation for treating patients with paroxysmal atrial fibrillation. CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Unique identifier: NCT00774566.

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  • Pulmonary vein isolation is achievable by point-by-point radiofrequency ablation, linear lesions encircling the pulmonary veins, or cryoballoon ablation, with similar outcomes.

    “achievable by point-by-point radiofrequency ablation, linear lesions encircling the pulmonary veins, or cryoballoon ablation, with similar outcomes.[732][733][734]”

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Authors
Luik, A., Radzewitz, A., Kieser, M., Walter, M., Bramlage, P., Hörmann, P., Schmidt, K., Horn, N., Brinkmeier-Theofanopoulou, M., Kunzmann, K., Riexinger, T., Schymik, G., Merkel, M., & Schmitt, C.
Affiliations
University of Freiburg (DE)
Corresponding author
Luik, Armin
Venue
Circulation
Published
2015-10-06
Volume
132
Issue
14
Pages
1311-1319
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2118862773
Cited by
275
References
49
Citations by year
2026: 11 · 2025: 12 · 2024: 16 · 2023: 21 · 2022: 22 · 2021: 23 · 2020: 26 · 2019: 27 · 2018: 34 · 2017: 40 · 2016: 42
FWCI
28.12
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • Circulation (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
Keywords
cryoballoon ablation, irrigated radiofrequency ablation, paroxysmal atrial fibrillation, pulmonary vein isolation, catheter ablation, non-inferiority, phrenic nerve palsy, procedural complications, reoperation
MeSH terms
Adrenergic beta-Antagonists, Aged, Anticoagulants, Atrial Fibrillation, Cardiovascular Diseases, Combined Modality Therapy, Cryosurgery, Diabetes Mellitus, Female, Humans, Intraoperative Complications, Male, Middle Aged, Pericardial Effusion, Phrenic Nerve, Prospective Studies, Pulmonary Veins, Electrocardiography, Ambulatory, Comorbidity, Treatment Outcome, Catheter Ablation, Sample Size, Risk Assessment, Postoperative Hemorrhage, Thrombophilia, Imaging, Three-Dimensional

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