Cardiac mapping
First Claim
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1. A method comprising:
- inserting a catheter into a heart cavity having an endocardium surface, the catheter comprising multiple, spatially distributed electrodes;
moving the catheter to each of multiple, different positions in the heart cavity;
for each of the different catheter positions, determining the positions of the catheter electrodes with respect to the endocardium surface;
for each of the different catheter positions, measuring signals at the catheter electrodes in response to electrical activity in the heart cavity;
determining physiological information at multiple locations of the endocardium surface based on the determined positions of the catheter electrodes and the measured signals at the different catheter positions by applying a transformation function to the measured signals, the transformation function relating the measured signals from at least some of the different positions to the physiological information at the multiple locations of the endocardium surface and being based in part on the catheter'"'"'s location relative to the endocardium surface; and
displaying information related to at least some of the determined physiological information.
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Abstract
A non-contact cardiac mapping method is disclosed that includes: (i) inserting a catheter into a heart cavity having an endocardium surface, the catheter including multiple, spatially distributed electrodes; (ii) measuring signals at the catheter electrodes in response to electrical activity in the heart cavity with the catheter spaced from the endocardium surface; and (iii) determining physiological information at multiple locations of the endocardium surface based on the measured signals and positions of the electrodes with respect to the endocardium surface. Related systems and computer programs are also disclosed.
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Citations
33 Claims
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1. A method comprising:
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inserting a catheter into a heart cavity having an endocardium surface, the catheter comprising multiple, spatially distributed electrodes; moving the catheter to each of multiple, different positions in the heart cavity; for each of the different catheter positions, determining the positions of the catheter electrodes with respect to the endocardium surface; for each of the different catheter positions, measuring signals at the catheter electrodes in response to electrical activity in the heart cavity; determining physiological information at multiple locations of the endocardium surface based on the determined positions of the catheter electrodes and the measured signals at the different catheter positions by applying a transformation function to the measured signals, the transformation function relating the measured signals from at least some of the different positions to the physiological information at the multiple locations of the endocardium surface and being based in part on the catheter'"'"'s location relative to the endocardium surface; and displaying information related to at least some of the determined physiological information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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a catheter configured to be inserted into a heart cavity having an endocardium surface and to move to each of multiple positions in the heart cavity, the catheter comprising; multiple, spatially distributed electrodes, the multiple electrodes configured to measure signals in response to electrical activity in the heart cavity; a device configured to determine, for each of the different catheter positions, the positions of the catheter electrodes with respect to the endocardium surface; a processing unit configured to determine physiological information at multiple locations of the endocardium surface based on the determined positions of the catheter electrodes and the measured signals at the different catheter positions by applying a transformation function to the measured signals, the transformation function relating signals measured from at least some of the different positions to the physiological information at the multiple locations of the endocardium surface and being based in part on the catheter'"'"'s location relative to the endocardium surface; and a display device configured to display at least a portion of the endocardium surface to include at least some information related to the determined physiological information. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification