Authors: Sven Knecht Tobias Reichlin Nikola Pavlovic Beat Schaer Stefan Osswald Christian Sticherling Michael Kühne
Publish Date: 2015/04/30
Volume: 43, Issue: 3, Pages: 297-306
Abstract
We retrospectively analyzed RF applications from 32 patients undergoing catheter ablation for paroxysmal atrial fibrillation using a forcesensing catheter and 3D mapping system CF catheter location and orientation relative to the tissue during ablation as well as the absolute impedance decrease during the first 20 s of ablation as a surrogate for lesion effectiveness were analyzed for 791 RF applicationsWhile a higher CF was achieved around the right pulmonary veins 125 vs 114 g p = 0045 a lower median absolute impedance decrease within the first 20 s was seen around the right veins compared to the left veins 93 vs 102 Ω p = 002 With different catheter orientations relative to the tissue higher CF and impedance decrease was seen when the catheter was orientated parallel or oblique to the tissue 30°–145° as compared perpendicularly 0–30° with a median CF of 132 vs 80 g p 0001 and a median impedance decrease during the first 20 s of 11 vs 7 Ω p 0001 Importantly achieved CF baseline impedance catheter orientation and location all independently predicted the initial absolute and relative impedance decrease in a multivariable linear regression model p 005Sven Knecht Tobias Reichlin and Beat Schaer have no conflict of interest Nikola Pavlovic is supported by an educational grant of the EHRA Stefan Osswald is a speaker of Bureau for Medtronic Boston Scientific Biotronik and St Jude Medical received unrestricted grants from Medtronic Boston Scientific Biotronik and St Jude Medical Christian Sticherling is a member of Medtronic Advisory Board Europe and received educational grants from Biosense Webster and Biotronik Michael Kühne received educational grants from Biosense Webster proctor for Medtronic and a speaker of Bureau for Boston Scientific St Jude Medical and Biotronik
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