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Gradual power titration using radiofrequency energy: a safe method for slow-pathway ablation in the setting of atrioventricular nodal re-entrant tachycardia
- Source :
- Europace. 11:178-183
- Publication Year :
- 2008
- Publisher :
- Oxford University Press (OUP), 2008.
-
Abstract
- Aims In the setting of atrioventricular nodal re-entrant tachycardia (AVNRT), radiofrequency (RF) catheter ablation of the slow-pathway (SP) ensures excellent outcome. However, the risk of complete heart block (CHB) remains real (≈1%) and detrimental. This study reports on a gradual power titration approach using RF energy, which allows a significant decrease in CHB occurrence. Methods and results Slow-pathway ablation was performed in 468 patients (mean age 43.8 ± 17.2 years, 311 women). Initial settings were 5 W, 60°C, 120 s (temperature-controlled mode). The power was increased by steps of 5 W for every 5 s until slow-accelerated junctional rhythm was obtained, and then further increased to 10 W maximum above this value. The acute success rate, the mean RF pulses applied per patient, and the average power delivered per successful RF applications were 99%, 3.2 ± 1.1, and 31.7 ± 3.0 W, respectively. There were nine (1.9%) transient and reversible AV blocks, and one (0.2%) permanent CHB only necessitating pacemaker insertion. The recurrence rate was 3.6% and the follow-up period was 28.1 ± 14.1 months. Conclusion Atrioventricular nodal re-entrant tachycardia RF ablation using gradual power titration is an efficient technique, capable of improving safety since it can decrease CHB occurrence.
- Subjects :
- Adult
Male
Tachycardia
medicine.medical_specialty
Adolescent
Heart block
medicine.medical_treatment
Catheter ablation
Young Adult
Risk Factors
Physiology (medical)
Internal medicine
medicine
Humans
Tachycardia, Atrioventricular Nodal Reentry
Aged
Retrospective Studies
Aged, 80 and over
business.industry
Middle Aged
medicine.disease
Ablation
Power (physics)
Heart Block
Treatment Outcome
Anesthesia
Catheter Ablation
Cardiology
Female
Re entrant
medicine.symptom
Cardiology and Cardiovascular Medicine
business
Junctional rhythm
Radiofrequency energy
Subjects
Details
- ISSN :
- 15322092 and 10995129
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Europace
- Accession number :
- edsair.doi.dedup.....44839eb0b265e54ab1c1912988a37b9d