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Unformatted text preview: 5.2 Nonfluoroscopic Catheter-Based Electroanatomical Mapping a. Cardiac mapping helps us understand arrhythmias and for figuring out ways to cure them. Device measures location and orientation of catheter plus local electrogram from its tip. Standard ECG measures amplified output when the heart beats, whereas device recreates image of heart. b. There are several shortcomings in using fluoroscopy: localization is inaccurate, cumbersome, and the patient is exposed to substantial radiation. c. Position of catheter tip is determined by reference catheter. There is a passive magnetic field sensor at the tip of the catheter which uses Biosense CARTO to determine position of magnetic technology. d. The CARTO system outputs a 3D map as a visual representation of the heart. Figure 5 shows the pigs left ventricle, Figure 6 is the activation map of the right atrium during...
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- Spring '10