Radiofrequency ablation for common atrial flutter using an 8-mm tip catheter and up to 150W
Abstract
The formation of bi-directional block in atrial flutter can be adversely affected by problems with the delivery of effective energy related to isthmus anatomy and contact. Higher energies can produce larger and more effective lesions. The optimum setting for power delivery using temperature controlled ablation has not been established, with the maximum reported being 100 W. This is a retrospective review of the first 50 new cases assessing the efficacy and safety of using temperature controlled (60-65 degrees C) flutter ablation with an 8mm tip electrode catheter and up to 150 W. All cases had either typical flutter alone (34%) or predominant flutter as the indication, no combined procedures were included. Acute procedural success was 94% and long-term success of 88%. Median number of ablations required was 11 (interquartile range 10-19), median procedure time 120 min (IQR 102-164), fluoroscopy time 22 min (IQR 17-36), radiation dose 17 Gy cm(2) (IQR 10-27), median number of lines 1 (IQR 1-2). Six patients achieved 150 W, but 42 achieved >100 W (median watts 142 W, IQR 104-147). Patients (12%) experienced an uncomplicated pop during the procedure. None experienced a significant complication. There were three late relapses. The setting of 150 W maximum delivered energy in temperature regulated ablation allowed higher energies (>100 W) to be delivered in most patients. This resulted in acute and long-term success rates that compare well with the literature but is associated with a 12% rate of pop. Subsequent to this series our 54th patient sustained a pop due to high energy ablation that resulted in perforation and tamponade, from which there was survival.
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Hemopericardium and tamponade can occur when very high-power radiofrequency energy is applied and tissue steam pop occurs.
“Hemopericardium and tamponade may occur if very high power RF is applied, and if tissue 'steam pop' occurs.186”
From European Heart Rhythm Association (EHRA) consensus document on the management of supraventricular arrhythmias, endorsed by Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulacion Cardiaca y Electrofisiologia (SOLAECE) (2017) · cites this paper as [186]
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- Authors
- HILLOCK, R., MELTON, I., & CROZIER, I.
- Affiliations
- Christchurch Hospital (NZ)
- Corresponding author
- HILLOCK, R
- Venue
- Europace
- Publisher
- Oxford University Press (OUP)
- Published
- 2005-09
- Volume
- 7
- Issue
- 5
- Pages
- 409-412
- ISSN
- 1099-5129 (ISSN-L)
- OpenAlex
- W2145572121
- Cited by
- 18
- References
- 18
- Citations by year
- 2024: 1 · 2023: 1 · 2021: 1 · 2020: 1 · 2017: 1 · 2016: 2 · 2014: 1
- FWCI
- 1.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- EP Europace (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Arrhythmias and Treatments
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Atrial Fibrillation Management and Outcomes
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac pacing and defibrillation studies
- Keywords
- atrial flutter, radiofrequency catheter ablation, temperature-controlled ablation, procedural success, ablation complications, cardiac tamponade, atrial flutter recurrence
- MeSH terms
- Atrial Flutter, Electrodes, Female, Fluoroscopy, Humans, Male, Middle Aged, Retrospective Studies, Radiography, Interventional, Treatment Outcome, Coronary Angiography, Catheter Ablation
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