1. Assessment of ablation catheter contact on valve annulus: Implications on accessory pathway ablation
- Author
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Jonathan M. Kalman, Paul B. Sparks, J. Lipton, Matthew G.D. Bates, Hariharan Raju, Wai Kah Choo, Joseph B. Morton, and Peter M. Kistler
- Subjects
medicine.medical_specialty ,lcsh:Diseases of the circulatory (Cardiovascular) system ,Radiofrequency ablation ,medicine.medical_treatment ,Catheter ablation ,Accessory pathway ,030204 cardiovascular system & hematology ,Contact force ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,law ,Physiology (medical) ,medicine ,Tricuspid annulus ,030212 general & internal medicine ,cardiovascular diseases ,Annulus (mycology) ,business.industry ,Ablation ,Surgery ,Catheter ,lcsh:RC666-701 ,cardiovascular system ,Original Article ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background: Catheter-tissue contact force is an important factor influencing lesion size and efficacy and thereby potential for arrhythmia recurrence following accessory pathway (AP) radiofrequency ablation. We aim to evaluate adequacy and perception of catheter contact on the tricuspid and mitral annuli. Methods: Data were collected from 42 patients undergoing catheter ablation. Operators were blinded to contact force information and reported perceived contact (poor, moderate, or good) while positioning the catheter at four tricuspid annular sites (12, 9, 6 and 4 o'clock positions; abbreviated as TA12, TA9, TA6 and TA4) and three mitral annular sites (3, 5 and 7 o'clock positions; abbreviated as MA3, MA5 and MA7) through long vascular sheaths. Results: The highest and lowest mean contact forces were obtained at MA7 (13.3 ± 1.7 g) and TA12 (3.6 g ± 1.3 g) respectively. Mean contact force on tricuspid annulus (6.1 g ± 0.9 g) was lower than mitral annulus (9.8 ± 0.9 g) locations (p = 0.0036), with greater proportion of sites with
- Published
- 2019