The Effect of Contact Force in Atrial Radiofrequency Ablation
Electroanatomical, Cardiovascular Magnetic Resonance, and Histological Assessment in a Chronic Porcine Model
Steven E. Williams, James Harrison, Henry Chubb, Lars Ølgaard Bloch, Niels Peter Andersen, Høgni Dam, Rashed Karim, John Whitaker, Jaswinder Gill, Michael Cooklin, C. Aldo Rinaldi, Kawal Rhode, Matthew Wright, Tobias Schaeffter, Won Yong Kim, Henrik Jensen, Reza Razavi and Mark D. O'Neill
(A) Late gadolinium enhancement (LGE) appearances (white arrows) for HF and LF ablation regions. (B) Standardized assessment of lesion volume involved manual segmentation of the posterior RA wall (yellow) and automatic segmentation of the entire volumetric image at 3 SDs above the atrial blood pool mean. Combining regions resulted in the ablation scar segmentation (green). (C) There was no difference in ablation volume between HF and LF ablation zones. Abbreviations as in Figures 2 and 4.