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- Title
Low Temperature and Low Energy Radiofrequency Modification of Atrioventricular Nodal Slow Pathways in Pediatric Patients.
- Authors
Rhodes, Larry A.; Wieand, Tammy S.; Vetter, Victoria L.
- Abstract
Objectives: To report our experience using low temperature and energy in the modification of the slow pathway in pediatric patients with atrioventricular nodal reentrant tachycardia. Background: A concern in performing a slow pathway modification is the possible damage of the normal AV conduction system. Lesion size has been shown to have a linear relationship with temperature. Previous reports have used energy of 25-50 W that generate temperatures of 60C°-70°C for successful procedures. Methods: Report of results of attempted AV nodal slow pathway modification in 17 consecutive pediatric patients < 15 years of age at The Children's Hospital of Philadelphia from April 1995 to November 1997 using low temperature and energy. Results: There were 18 successful slow pathway modifications with 1 recurrence in 17 patients. The maximum energy used during successful lesions was 32.7 ± 13.8 W (range 15-50 W) with a mean energy of 26.4 ± 13.3 W (range 12-48 W). The peak temperature during these lesions was 55.1 deg;C ± 4.1° C (range 48°C-64°C) with a mean temperature of 47.9°C± 2.7°C (range 44°C-54°C). The mean number of radiofrequency lesions required for a successful modification was 5.8±6.7 (median 4.0, range 1-26). Patients have been followed for 2.08 plusmn; 0.79 years. Conclusions: Slow pathway modification can be performed successfully with a low incidence of recurrence in the pediatric patient using low energy and temperature. It is possible that this may lead to smaller lesions.
- Subjects
LOW temperatures; PHYSIOLOGICAL effects of temperature; ATRIOVENTRICULAR node; CATHETER ablation; PEDIATRICS
- Publication
Pacing & Clinical Electrophysiology, 1999, Vol 22, Issue 7, p1071
- ISSN
0147-8389
- Publication type
Article
- DOI
10.1111/j.1540-8159.1999.tb00572.x