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Abstract #2601

Multimodality Cardiac Magnetic Resonance Imaging to assess large intramural lesions of a new irrigated needle catheter on sheep infarct model

Julie Magat 1 , Benjamin Berte 1 , Hubert Cochet 1 , Jrme Naulin 1 , Daniele Ghidoli 2 , Pierre Jais 1 , Stephen Henry Gilbert 3 , Olivier Bernus 1 , and Bruno Quesson 1

1 IHU-LIRYC U1045, University of Bordeaux, Pessac, France, 2 Biosense Webster,R&D, Diamond Bar, California, United States, 3 Mathematical Cell Physiology, Max Delbrck Center for Molecular Medicine, Berlin, Germany

Catheter ablation became standard practice for the treatment of ventricular tachycardia. However, radiofrequency catheter ablation is limited by lesion depth. The aim of this study was to evaluate the lesion site area on sheep infarct model and characteristics of intramural ablation using a new irrigated needle catheter by MRI. We present results obtained using T 1 mapping/weighted after contrast injection at 1.5T and high resolution images at 9.4T. With in vivo and ex vivo images, we were able to identify infarct area in the septum and lesions due to catheter ablation. Moreover, high field MRI allowed us (resolution of 80m x 80m x 235m) to evaluate precisely ablations zones inside the muscle.

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