Abstract
Background MRI provides luminal, edema, & scar images which assist in the Electrophysiological (EP) treatment of ventricular and atrial arrhythmias]. Until a complete set of MR-compatible EP-devices is available, patients must be repeatedly moved between the MRI, where imaging and mapping occur, to the conventional EP suite, where puncture, navigation and Radio-Frequency Ablation occur. MRI-conditional voltage-based electroanatomic mapping (EAM) would permit efficient MRI-guided EP, with registration-free continuation outside MRI, utilizing X-ray, Intra-Cardiac-Echo (ICE) and EAM guidance. A 1.5T EnSiteTM VelocityTM cardiac mapping system, a voltage-based EAM available from St. Jude Medical was previously validated [1,2]. Multiple-catheter EAM (localization and intra-cardiac electrocardiogram (EGM) measurement) inside a 3T MRI requires modifications.
Highlights
MRI provides luminal, edema, & scar images which assist in the Electrophysiological (EP) treatment of ventricular and atrial arrhythmias]
An EnSiteTM VelocityTM system was connected to an electronic switching circuit that prevents induced MRI gradient-ramp noise from corrupting ECG fidelity
Millar catheters were placed in the aorta to monitor Invasive Blood Pressure (IBP)
Summary
MRI-compatible voltage-based electroanatomic mapping system for 3T MR-guided cardiac electrophysiology: swine validations. Shelley H Zhang, Zion T Tse, Charles L Dumoulin, Israel Bryd, Jeffrey Schweitzer, Ronald G Watkins, Kim Butts-Pauly, Raymond Y Kwong, Chirag R Barbhaiya, William G Stevenson, Ferenc Jolesz, Ehud J Schmidt1*. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. 16-19 January 2014
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