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Abstract #2931

Catheter Electrogram Signals in 3T MR Environment

Gene H. Payne1, 2, Kamal Vij3, Nelly A. Volland1, 2, Ravi Ranjan, 24, Rob MacLeod2, 5, Nassir Marrouche2, 4

1UCAIR, University of Utah, Salt Lake City, UT, United States; 2CARMA Center, University of Utah, Salt Lake City, UT, United States; 3MRI Interventions, Inc., Irvine, CA, United States; 4Department of Cardiology, University of Utah, Salt Lake City, UT, United States; 5Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, United States

During RF ablation procedures for the treatment of atrial fibrillation, endocardial electrogram signals are detected, recorded, and displayed for the clinician. A steerable ablation catheter is used to detect these EGM signals. With the ultimate goal of performing this atrial fibrillation treatment inside an MR scanner, it will be necessary to obtain reliable, low-noise signals inside the MR scanner. Presented are some details of the experimental setup that were required to obtain good electrogram signals on a porcine subject inside a 3T MR scanner.

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Keywords

ablating ablation ablations acquisition addition affect allow allowable allowing amount amplitude anatomical appeared artifacts assessed atrium cables cardiology catheter catheters cause circuit city coils computing contributed contributing copper deliver delivering designed detect detected detection determined determining develop developed displayed effectiveness either electrode electronic electronics embedded emery energy entering environment equipment experimentally field fields filter filters floor frequency gene goal ground guided hardware improvements in vivo inability increasing induced initially injected inside institute interfering interleaved interventions introduced iris isolated issue lake landmark location mapping measured measures metal millimeters millivolt minimize models much must noise notch novel outside paper passed patch placed platinum porcine positioned power powered prevent previously procedure procedures real reason receiver recorded recording recordings reduce reduction reliable reported require resolved ring salt samples scanner scientific scrubbing sense setting setup share short slightly software solution sources steerable steering subject suite surface system systems tracked tracking treatment typical unclean unipolar useful utilizing verified waveguide