Journal article
Predictive value of impedance changes for real-time contact force measurements during catheter ablation of atrial arrhythmias in humans
S Kumar, H Haris M., M Chan, J Lee, M Yudi, MCG Wong, JB Morton, LH Ling, T Robinson, PM Heck, NF Kelland, K Halloran, SJ Spence, PM Kistler, JM Kalman
Heart Rhythm | ELSEVIER SCIENCE INC | Published : 2013
Abstract
Background Catheter-tissue contact force (CF) determines radiofrequency (RF) ablation lesion size. Impedance changes during RF delivery are used as surrogate markers for CF. The relationship between impedance and real-time CF in humans remains unknown. Objectives To determine whether impedance changes have predictive value for real-time CF during catheter ablation of atrial arrhythmias. Methods Real-time CF, force-time integral, and impedance were measured in 2265 RF lesions for atrial fibrillation or flutter in 34 patients. Operators were blinded to CF measurements. Impedance preablation, at 5-second intervals for 30 seconds after the RF onset, maximal impedance fall and time to impedance p..
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Grants
Awarded by National Health and Medical Research Council
Funding Acknowledgements
Dr Kumar is the recipient of a postgraduate research scholarship cofunded by the National Health and Medical Research Council and the National Heart Foundation of Australia (Scholarship ID 628996). Dr Ling and Dr Wong are recipients of the postgraduate research scholarship of the National Heart Foundation of Australia.