Impedance based anatomy generation
First Claim
Patent Images
1. A method comprising:
- inserting a catheter into a heart, the catheter comprising three or more electrodes;
causing the catheter to move to each of multiple, different positions in the heart;
for each of the multiple, different catheter positions, causing current to flow between at least some of the electrodes and in response to current flow, measuring an electrical signal at each of one or more of the electrodes; and
applying a threshold to the measured signals to select a subset of the electrode positions based on a measure indicative of a strength of influence of the cardiac chamber boundary on the measured signals; and
generating anatomical information about the heart based on positions of the catheter electrodes and the electrical signals from the electrodes at the determined subset of electrode positions.
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Abstract
Methods and systems for the determination and representation of anatomy anatomical information are disclosed herein. Methods and systems described herein include generating anatomical information about the heart based on positions of the catheter electrodes and the electrical signals from the electrodes at the determined subset of electrode positions.
129 Citations
35 Claims
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1. A method comprising:
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inserting a catheter into a heart, the catheter comprising three or more electrodes; causing the catheter to move to each of multiple, different positions in the heart; for each of the multiple, different catheter positions, causing current to flow between at least some of the electrodes and in response to current flow, measuring an electrical signal at each of one or more of the electrodes; and applying a threshold to the measured signals to select a subset of the electrode positions based on a measure indicative of a strength of influence of the cardiac chamber boundary on the measured signals; and generating anatomical information about the heart based on positions of the catheter electrodes and the electrical signals from the electrodes at the determined subset of electrode positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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inserting a catheter into a heart, the catheter comprising three or more electrodes; causing the catheter to move to each of multiple, different positions in the heart; for each of the multiple, different catheter positions, causing current to flow between at least some of the electrodes and in response to current flow, measuring an electrical signal at each of one or more of the electrodes; and determining anatomical information about the heart based on positions of the catheter electrodes and a comparison between an expected field in a homogenous medium and the measured electrical signals. - View Dependent Claims (11, 12, 13, 14)
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15. A method comprising:
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inserting a catheter into a heart, the catheter comprising three or more electrodes; causing the catheter to move to each of multiple, different positions in the heart; for each of the multiple, different catheter positions, causing current to flow between at least some of the electrodes and in response to current flow, measuring an electrical signal at each of one or more of the electrodes; and generating anatomical information about the heart by detecting variations in the measured signals based on an inhomogeneous distribution of material due to anatomical features of the heart. - View Dependent Claims (16, 17, 18, 19)
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20. A system comprising:
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a catheter comprising multiple, spatially distributed electrodes including one or more electrodes configured to inject a current and to measure electrical signals in response to the injected current; a system configured to determine a position of the catheter electrodes at multiple, different catheter positions; and a processing unit configured to apply a threshold to the measured signals to select a subset of the electrode positions based on a measure indicative of a strength of influence of the cardiac chamber boundary on the measured signals and generate anatomical information about the heart based on positions of the catheter electrodes and the signals from the electrodes at the determined subset of electrode positions. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A system comprising:
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a catheter comprising multiple, spatially distributed electrodes including one or more electrodes configured to inject a current and to measure electrical signals in response to the injected current; a system configured to determine a position of the catheter electrodes at multiple, different catheter positions; and a processing unit configured to determine anatomical information about the heart based on positions of the catheter electrodes and a difference between an expected field in a homogenous medium and the measured electrical signals. - View Dependent Claims (29, 30, 31, 33, 34, 35)
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32. A system comprising:
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a catheter comprising multiple, spatially distributed electrodes including one or more electrodes configured to inject a current and to measure electrical signals in response to the injected current; a system configured to determine a position of the catheter electrodes at multiple, different catheter positions; and a processing unit configured to generate anatomical information about the heart by detecting variations in the measured signals based on an inhomogeneous distribution of material due to anatomical features of the heart.
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Specification