Cardiac ablation catheter using correlation measure
First Claim
1. A method for assessing the effectiveness of treatment of abnormal conduction paths in the heart of a subject, comprising:
- positioning a probe at a treatment site in the heart;
sensing respective first and second electrical signals, using the probe, at first and second points in the endocardium in a vicinity of the site; and
determining a correlation measure of the first and second signals sensed by the probe, so as to detect an abnormal conduction path in the vicinity of the site.
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Accused Products
Abstract
Apparatus for endocardiac therapy, including an elongate probe for insertion into the heart of a subject, the probe having distal and proximal ends. The probe includes an ablation device near the distal end of the probe for ablating heart tissue and at least two sensing electrodes, for sensing activation signals in the heart tissue adjacent to the ablation device. Signal analyzer circuitry receives and correlates the activation signals. Preferably, the probe includes a position sensor adjacent to the ablation device, which generates signals responsive to the position of the probe with respect to an external frame of reference.
370 Citations
40 Claims
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1. A method for assessing the effectiveness of treatment of abnormal conduction paths in the heart of a subject, comprising:
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positioning a probe at a treatment site in the heart; sensing respective first and second electrical signals, using the probe, at first and second points in the endocardium in a vicinity of the site; and determining a correlation measure of the first and second signals sensed by the probe, so as to detect an abnormal conduction path in the vicinity of the site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for mapping electrical activity in the heart of a subject, comprising:
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positioning a probe at a plurality of sites in the heart; sensing respective first and second electrical signals, using the probe, at first and second points in the endocardium in the respective vicinity of each of the plurality of sites; processing the signals sensed by the probe to determine a correlation measure of the respective first and second signals at each of the plurality of sites; and producing a map of the correlation measures. - View Dependent Claims (18, 19, 23, 24, 25, 26)
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20. A method for determining the effect of ablation on excitable tissue, comprising:
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positioning a probe in a vicinity of a lesion ablated in the tissue; receiving electrical signals, using the probe, from at least two points in the vicinity; and processing the signals received by the probe to determine a correlation measure between the signals at the points. - View Dependent Claims (21, 22)
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27. Intracardiac apparatus, comprising:
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an elongate probe for insertion into the heart of a subject, said probe having distal and proximal ends and comprising at least two sensing electrodes near the distal end of the probe, for sensing signals in the heart tissue; and signal analyzer circuitry, which receives the signals from the probe and calculates a correlation measure of the signals. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. Apparatus for determining the effectiveness of treatment of abnormal conduction in the heart of a subject, comprising:
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an elongate probe for insertion into the heart of the heart, said probe having distal and proximal ends and comprising at least two sensing electrodes near the distal end of the probe, for sensing activation signals in the heart tissue; and signal analyzer circuitry, which receives the activation signals from the probe, determines a correlation measure thereof, and compares a first correlation measure determined before the treatment with a second correlation measure determined after the treatment. - View Dependent Claims (38, 39, 40)
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Specification