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Figure 1 Magnetic catheter and magnetic guidance system (MGS) (A) Photographs of the 7F magnetic catheter. A closeup of the catheter tip is shown on the right. A permanent magnet embedded within the tip of the catheter interacts with a prevailing magnetic field. A standard, platinum 4-mm-tip electrode and a proximal ring electrode are used for endocardial recording and pacing. The scale bar is 20 mm. (B) A photograph of the MGS. This system consists of a housing that surrounds the patient's torso; the system also contains an electromagnetic array, a digital biplanar fluoroscope, a standard fluoroscopy table, and a graphical workstation for catheter navigation. The system is shown with the fluoroscopy table withdrawn from the electromagnet housing.
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