Prediction and assessment of ablation of cardiac tissue
First Claim
1. Apparatus for ablating cardiac tissue in a heart of a subject, comprising:
- a catheter, which is adapted to be inserted into the body and within the heart so as to contact the cardiac tissue to be ablated at a desired position in the heart, the catheter comprising;
at least one sensor, which measures one or more local parameters at the position prior to and after ablating the tissue and a position sensor which generates signals for determining position and orientation coordinates of the distal end of the catheter; and
an ablation device, which applies a given dosage of energy to the tissue so as to ablate the tissue;
a display, which displays a map of the heart; and
a controller, which determines the position and orientation coordinates of the distal end of the catheter using the signals generated by the position sensor and generates the map showing, based on the one or more local parameters measured by the at least one sensor, a predicted extent of ablation of the tissue to be achieved for the given dosage of energy, and an actual extent of the ablation determined subsequent to ablating the tissue, for comparison with the predicted extent using the position and orientation coordinates.
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Accused Products
Abstract
A method for ablating tissue in an organ inside a body of a subject includes bringing a probe inside the body into a position in contact with the tissue to be ablated, and measuring one or more local parameters at the position using the probe prior to ablating the tissue. A map of the organ is displayed, showing, based on the one or more local parameters, a predicted extent of ablation of the tissue to be achieved for a given dosage of energy applied at the position using the probe. The given dosage of energy is applied to ablate the tissue using the probe, and an actual extent of the ablation at the position is measured using the probe subsequent to ablating the tissue. The measured actual extent of the ablation is displayed on the map for comparison with the predicted extent.
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Citations
21 Claims
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1. Apparatus for ablating cardiac tissue in a heart of a subject, comprising:
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a catheter, which is adapted to be inserted into the body and within the heart so as to contact the cardiac tissue to be ablated at a desired position in the heart, the catheter comprising; at least one sensor, which measures one or more local parameters at the position prior to and after ablating the tissue and a position sensor which generates signals for determining position and orientation coordinates of the distal end of the catheter; and an ablation device, which applies a given dosage of energy to the tissue so as to ablate the tissue; a display, which displays a map of the heart; and a controller, which determines the position and orientation coordinates of the distal end of the catheter using the signals generated by the position sensor and generates the map showing, based on the one or more local parameters measured by the at least one sensor, a predicted extent of ablation of the tissue to be achieved for the given dosage of energy, and an actual extent of the ablation determined subsequent to ablating the tissue, for comparison with the predicted extent using the position and orientation coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for ablating cardiac tissue in a heart of a subject, comprising:
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a catheter, which is adapted to be inserted into the body and within the heart so as to contact the cardiac tissue to be ablated, the catheter comprising; a position sensor, which generates an output indicative of a position and orientation of the distal end of the catheter relative to the cardiac tissue with which the catheter is in contact; and an ablation device, which applies a given dosage of energy to the tissue so as to ablate the tissue; a display, which displays a map of the heart; and a controller, which computes position and orientation coordinates of the distal end of the catheter based on the output from the position sensor and, a prediction of an extent of ablation of the tissue to be achieved for the given dosage of energy, so as to enable the dosage to be adjusted responsively to the prediction using the position and orientation coordinates of the distal end of the catheter. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification