Multi-electrode mapping system
First Claim
Patent Images
1. A method comprising:
- measuring physiological signals in response to electrical activity in a heart cavity having a surface, the physiological signals comprising unipolar potential signals and measuring each of the physiological signals comprising measuring a potential between a first electrode and a second electrode, the first electrode being located within the heart cavity and the second electrode being located at a distance from the heart cavity such that the electrode is not affected by local tissue activation in a heart cavity;
determining a transformation function that transforms between spatial coordinates of positions of the first electrode in the heart cavity and coordinates of the surface;
determining, based at least in part on Laplace'"'"'s equation, bipolar physiological information at multiple locations of the surface based on the measured unipolar potential signals and the positions of the first electrode with respect to the surface, and based on at least one of subtracting the measured unipolar potential signals from neighboring positions and subtracting, from neighboring positions, surface potentials determined from a unipolar potential inverse engine, the bipolar physiological information comprising current density information; and
displaying an electro-anatomical map (“
EAM”
), the EAM comprising an electro-anatomical depiction of at least a portion of the surface of the heart cavity, the EAM further comprising the determined current density information.
2 Assignments
0 Petitions
Accused Products
Abstract
In some aspects, a method includes measuring unipolar signals at one or more electrodes in response to electrical activity in a heart cavity. The method also includes determining, based at least in part on Laplace'"'"'s equation, bipolar physiological information at multiple locations of an surface based on the measured unipolar signals and positions of the one or more electrodes with respect to the surface.
-
Citations
50 Claims
-
1. A method comprising:
-
measuring physiological signals in response to electrical activity in a heart cavity having a surface, the physiological signals comprising unipolar potential signals and measuring each of the physiological signals comprising measuring a potential between a first electrode and a second electrode, the first electrode being located within the heart cavity and the second electrode being located at a distance from the heart cavity such that the electrode is not affected by local tissue activation in a heart cavity; determining a transformation function that transforms between spatial coordinates of positions of the first electrode in the heart cavity and coordinates of the surface; determining, based at least in part on Laplace'"'"'s equation, bipolar physiological information at multiple locations of the surface based on the measured unipolar potential signals and the positions of the first electrode with respect to the surface, and based on at least one of subtracting the measured unipolar potential signals from neighboring positions and subtracting, from neighboring positions, surface potentials determined from a unipolar potential inverse engine, the bipolar physiological information comprising current density information; and displaying an electro-anatomical map (“
EAM”
), the EAM comprising an electro-anatomical depiction of at least a portion of the surface of the heart cavity, the EAM further comprising the determined current density information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 32)
-
-
24. The method of 1, wherein the second electrode comprises one or more body-surface electrodes.
-
33. A method comprising:
-
measuring electrical potentials between a first electrode located in a heart cavity and a second electrode located outside the heart cavity in response to electrical activity in the heart cavity having a surface; determining a transformation function that transforms between spatial coordinates of positions of the first electrode in the heart cavity and coordinates of the surface; determining bipolar information at multiple locations of the surface based on the measured electrical potentials and the positions of the first electrode with respect to the surface, and based on at least one of subtracting the measured electrical potentials from neighboring positions and subtracting, from neighboring positions, surface potentials determined from a unipolar potential inverse engine, the bipolar information comprising a normal component of the current density, a magnitude of a current density vector, or a magnitude of a tangential component of the current density; and displaying an electro-anatomical map (“
EAM”
), the EAM comprising an electro-anatomical depiction of at least a portion of the surface of the heart cavity, the EAM further comprising the determined bipolar information. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
-
Specification