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US 7,263,397 B2Granted
Method and apparatus for catheter navigation and location and mapping in the heart
AssigneeSt. Jude Medical, Atrial Fibrillation Division, Inc.
InventorsJohn A. Hauck, Jeff A. Schweitzer, Michael Craven, Valtino Afonso, Holly Cotner, Frank Callaghan, John Schultz
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Abstract
A medical system for finding and displaying the location of electrodes within the body. The electrodes may be used to measure the voltage on the heart wall and display this as an activation map on a geometry representing the heart chamber.
Claims4
A method to collect and present cardiac medical information to a physician comprising:
- applying a set of surface patch electrodes to said patient;
- positioning an intracavitary electrode on a catheter placed in a heart of said patient;
- injecting current between pairs of said set of surface patch electrodes, defining driven electrode axes;
- measuring the voltage present on the intracavitary electrode due to the applied currents;
- resolving the location of the intracavitary electrode along each of the axes based upon the measured voltage on the intracavitary electrode;
- collecting multiple intracavitary electrode locations;
- selecting the exterior most locations and creating a shell based upon the exterior most locations generating a surface geometry;
- and
- presenting the surface geometry as an image to the physician.
6 more elements
Dependencies are inferred from the claim text.