Rapid mapping of electrical activity in the heart
First Claim
1. A method for mapping electrical activity of a heart, comprising:
- inserting a probe into a chamber of the heart, the probe comprising at least one position sensing device and a plurality of non-contact electrodes;
determining position coordinates of the electrodes relative to an endocardial surface of the chamber, using the at least one position sensing device;
measuring electrical potentials at the determined position coordinates using the electrodes;
computing electrical potentials at a plurality of points on the endocardial surface, using the measured potentials and the position coordinates by finding an electric dipole strength at each of the plurality of points on the endocardial surface, responsive to the measured potentials; and
generating a map of electrical activity over the endocardial surface based on the computed potentials.
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Abstract
A method for mapping electrical activity of a heart includes inserting a probe into a chamber of the heart, the probe including at least one position sensing device and a plurality of non-contact electrodes. Position coordinates of the electrodes are determined relative to an endocardial surface of the chamber, using the at least one position sensing device, and electrical potentials are measured at the determined position coordinates using the electrodes. Electrical potentials are computed at a plurality of points on the endocardial surface, using the measured potentials and the position coordinates, so as to generate a map of electrical activity over the endocardial surface based on the computed potentials.
234 Citations
17 Claims
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1. A method for mapping electrical activity of a heart, comprising:
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inserting a probe into a chamber of the heart, the probe comprising at least one position sensing device and a plurality of non-contact electrodes;
determining position coordinates of the electrodes relative to an endocardial surface of the chamber, using the at least one position sensing device;
measuring electrical potentials at the determined position coordinates using the electrodes;
computing electrical potentials at a plurality of points on the endocardial surface, using the measured potentials and the position coordinates by finding an electric dipole strength at each of the plurality of points on the endocardial surface, responsive to the measured potentials; and
generating a map of electrical activity over the endocardial surface based on the computed potentials. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Apparatus for mapping electrical activity of a heart, comprising:
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a probe, having a distal end configured for insertion into a chamber of the heart, the probe comprising, in proximity to the distal end, at least one position sensing device and a plurality of non-contact electrodes;
a processor, coupled to the probe so as to determine position coordinates of the electrodes relative to an endocardial surface of the chamber, using the at least one position sensing device, and to measure electrical potentials at the determined position coordinates using the electrodes, so as to compute electrical potentials at a plurality of points on the endocardial surface, using the measured potentials and the position coordinates, wherein the processor is adapted to compute an electric dipole strength at each of the plurality of points, responsive to the measured potentials; and
a display, coupled to be driven by the processor so as to display a map of electrical activity over the endocardial surface based on the computed potentials. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification