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Abstract #4153

MR-Guided Electrophysiology System for Activation and Pace Mapping in Left Ventricle

Samuel O. Oduneye1, Andriy Shmatukha2, Vladimir Verpakhovski3, Charles L. Dumoulin4, Ehud Schmidt5, Eugene Crystal6, Graham A. Wright1

1Medical Biophysics, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada; 2GE Healthcare, Toronto, Ontario, Canada; 3Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; 4GE Global Research Center, Niskayuna, NY, United States; 5Brigham and Women's Hospital & Massachusetts General Hospital, Boston, MA, United States; 6Arrhythmia Services, Sunnybrook Health Sciences Centre, Toronto, Canada

In recent studies, electrophysiology information has been compared with pre-acquired MR images to determine the relation between the two measurements; however, that approach is sensitive to registration errors and changes in anatomical conditions. Here, we present an MR-compatible EP system for real-time MR imaging able to directly locate and characterize electrical properties of potential arrhythmogenic regions in the left ventricle (LV) by measuring local conduction velocities at different pacing frequencies.