Electrophysiological cardiac mapping system based on a non-contact non-expandable miniature multi-electrode catheter and method therefor
First Claim
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1. A system for determining electrical potentials on an endocardial surface of a heart, the system comprising:
- a non-contact catheter probe having a surface and a terminal end portion adapted to be positioned in a cavity of the heart, the terminal end portion being adapted to be conformed into a first elongate shape and at least one second curved shape that includes a spiral shape, wherein the terminal end portion is conformed without expanding the terminal end portion;
a plurality of electrodes disposed on the end portion of the probe, the electrodes being adaptable to measure electrical potentials in the cavity;
imaging means for capturing geometric data on the probe and the endocardial surface;
means for determining a geometric relationship between the probe surface and the endocardial surface based on the geometric data;
means for generating a matrix of coefficients representing the geometric relationship between the probe surface and the endocardial surface; and
, means for determining endocardial potentials based on catheter probe electrode potentials and the matrix of coefficients.
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Abstract
A system (10) for determining electrical potentials on an endocardial surface of a heart is provided. The system includes a non-contact, non-expandable, miniature, multi-electrode catheter probe (12), a plurality of electrodes (32) disposed on an end portion (30) thereof, means for determining endocardial potentials (14) based on electrical potentials measured by the catheter probe, a matrix of coefficients that is generated based on a geometric relationship between the probe surface, and the endocardial surface. A method is also provided.
193 Citations
12 Claims
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1. A system for determining electrical potentials on an endocardial surface of a heart, the system comprising:
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a non-contact catheter probe having a surface and a terminal end portion adapted to be positioned in a cavity of the heart, the terminal end portion being adapted to be conformed into a first elongate shape and at least one second curved shape that includes a spiral shape, wherein the terminal end portion is conformed without expanding the terminal end portion;
a plurality of electrodes disposed on the end portion of the probe, the electrodes being adaptable to measure electrical potentials in the cavity;
imaging means for capturing geometric data on the probe and the endocardial surface;
means for determining a geometric relationship between the probe surface and the endocardial surface based on the geometric data;
means for generating a matrix of coefficients representing the geometric relationship between the probe surface and the endocardial surface; and
,means for determining endocardial potentials based on catheter probe electrode potentials and the matrix of coefficients. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for determining electrical potentials on an endocardial surface of a heart, the system comprising:
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a non-contact catheter probe having a surface and a terminal end portion adapted to be positioned in a cavity of the heart, the terminal end portion being cylindrical in cross-section and adapted to be conformed into a first elongate shape and at least one second curved shape that includes a spiral shape, wherein the terminal end portion is conformed without expanding the terminal end portion;
a plurality of electrodes disposed on the end portion of the probe, the electrodes being adaptable to measure electrical potentials in the cavity;
imaging means for capturing geometric data on the probe and the endocardial surface;
means for determining a geometric relationship between the probe surface and the endocardial surface based on the geometric data;
means for generating a matrix of coefficients representing the geometric relationship between the probe surface and the endocardial surface;
means for determining endocardial potentials based on catheter probe electrode potentials and the matrix of coefficients;
means for generating electrograms based on the determined endocardial potentials; and
,means for generating isochrone maps based on the electrograms. - View Dependent Claims (8, 9, 10)
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11. A system for determining electrical potentials on an endocardial surface of a heart, the system comprising:
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a non-contact catheter probe means, having a surface and a terminal end portion, for position in a cavity of the heart, the terminal end portion being cylindrical in cross-section and adapted to be conformed into a first elongate shape and at least one second curved shape that includes a spiral shape, wherein the terminal end portion is conformed without expanding the terminal end portion;
electrode means disposed on the end portion of the probe, for measuring electrical potentials;
imaging means for capturing geometric data on the probe and the endocardial surface;
means for determining a geometric relationship between the surface of the probe means and the endocardial surface based on the geometric data;
means for generating a matrix of coefficients representing the geometric relationship between the surface of the probe means and the endocardial surface;
means for determining endocardial potentials based on catheter probe electrode potentials and the matrix of coefficients;
means for generating electrograms based on the determined endocardial potentials; and
,means for generating isochrone maps based on the electrograms. - View Dependent Claims (12)
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Specification