Cardiac mapping with catheter shape information
First Claim
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1. A method comprising:
- processing information related to characteristics of catheter shape;
measuring first signals before treatment at catheter electrodes at each of multiple, different positions of a catheter in a heart cavity in response to electrical activity in the heart cavity;
determining first physiological information at multiple locations of an endocardium surface based at least in part on the first signals and catheter shape information provided by the processing of the information related to the characteristics of the catheter shape;
measuring second signals at the catheter electrodes after the treatment;
determining second physiological information based at least in part on the second signals and the catheter shape information; and
displaying a difference map including information about changes, from the first physiological information to the second physiological information, that occurred in response to the treatment.
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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
20 Claims
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1. A method comprising:
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processing information related to characteristics of catheter shape; measuring first signals before treatment at catheter electrodes at each of multiple, different positions of a catheter in a heart cavity in response to electrical activity in the heart cavity; determining first physiological information at multiple locations of an endocardium surface based at least in part on the first signals and catheter shape information provided by the processing of the information related to the characteristics of the catheter shape; measuring second signals at the catheter electrodes after the treatment; determining second physiological information based at least in part on the second signals and the catheter shape information; and displaying a difference map including information about changes, from the first physiological information to the second physiological information, that occurred in response to the treatment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a catheter comprising; multiple, spatially distributed electrodes, the multiple electrodes configured to; measure first signals in response to electrical activity in a heart cavity prior to treatment; and measure second signals in response to electrical activity in the heart cavity after the treatment; a processing unit configured to; process information related to characteristics of the catheter shape; determine first physiological information at multiple locations of an endocardium surface based at least in part on the first signals and catheter shape information provided by the processing of the information related to the characteristics of the catheter shape; and determine second physiological information at multiple locations of the endocardium surface based at least in part on the second signals and the catheter shape information; and a display device configured to display a difference map comprising information about the difference between the first physiological information and the second physiological information. - View Dependent Claims (11, 12, 13)
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14. A method comprising:
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processing information related to characteristics of catheter shape; measuring signals at catheter electrodes at each of multiple, different catheter positions in a heart cavity in response to electrical activity in the heart cavity; determining a frequency representation of electrical activity at multiple locations of an endocardium surface during a heart beat cycle, wherein the frequency representation is computed based on electrical potential values at the catheter electrodes; and displaying information related to at least a portion of the frequency representation. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification