METHODS FOR DETECTION OF CARDIAC RHYTHM DISORDERS USING BASKET STYLE CARDIAC MAPPING CATHETER
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Abstract
A method for sensing multiple local electric voltages from endocardial surface of a heart, includes: providing a system for sensing multiple local electric voltages from endocardial surface of a heart, including: a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly including: a plurality of flexible splines for guiding a plurality of exposed electrodes, the splines having proximal portions, distal portions and medial portions therein between, wherein the electrodes are substantially flat electrodes and are substantially unidirectionally oriented towards a direction outside of the basket.
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Citations
37 Claims
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1-10. -10. (canceled)
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11. A method for sensing multiple local electric voltages from endocardial surface of a heart and minimizing electro-magnetic interference, comprising:
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providing a system for sensing multiple local electric voltages from endocardial surface of a heart, comprising; a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly comprising; a plurality of flexible splines for guiding a plurality of exposed electrodes, the splines having proximal portions, distal portions and medial portions therein between, wherein the exposed electrodes are substantially flat electrodes and are substantially unidirectionally oriented towards a direction outside of the basket; a proximal anchor for securably affixing the proximal portions of the splines;
said proximal anchor being secured at the distal end of the first elongate tubular member;a distal tip for only securably affixing the distal portions of the splines, said proximal anchor and said distal tip defining a longitudinal axis therein between about which the splines are disposed; and a second elongate tubular member having a lumen, a proximal end and a distal end, the second elongate tubular member having a braided shield disposed between the proximal end of the second elongate tubular member and the distal end of the second elongate tubular member to minimize electro-magnetic interference from sources outside of the second elongate tubular member; wherein the basket assembly is slidingly compressible within the lumen of the second elongate tubular member; wherein the splines comprise a superelastic material such that the basket assembly exhibits a substantially cylindrical shape when radially compressed within the second elongate tubular member and exhibits a radially expanded non-spherical shape when not radially compressed within the second elongate tubular member; delivering the system to the heart; sliding the basket assembly beyond the distal end of the second elongate tubular member, whereby the splines radially expand into the radially expanded non-spherical shape to dispose the basket assembly within a chamber of the heart; contacting proximal heart tissue within the chamber of the heart with the substantially all of exposed electrodes disposed on the proximal spline portions; detecting multiple local electric voltages with the exposed electrodes contacting the proximal heart tissue from endocardial surface thereat; contacting other heart tissue within the chamber of the heart with substantially all of the exposed electrodes disposed on the medial spline portions and the distal spline portions; detecting multiple local electric voltages with the exposed electrodes disposed on the medial spline portions and the distal spline portions contacting the other heart tissue from endocardial surface thereat; and minimizing electro-magnetic interference from sources outside of the second elongate tubular member. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method for sensing multiple local electric voltages from endocardial surface of a heart with fluoroscopic imaging, comprising:
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providing a system for sensing multiple local electric voltages from endocardial surface of a heart, comprising; a first elongate tubular member having a lumen, a proximal end and a distal end; a basket assembly comprising; a plurality of flexible splines for guiding a plurality of exposed radio-transparent electrodes, the splines having proximal portions, distal portions and medial portions therein between, wherein the exposed electrodes are substantially flat electrodes and are substantially unidirectionally oriented towards a direction outside of the basket; a plurality of radiopaque markers where at least one radiopaque marker is disposed on each of said plurality of flexible splines at a location near and below at least one of said plurality of exposed electrodes; a proximal anchor for securably affixing the proximal portions of the splines;
said proximal anchor being secured at the distal end of the first elongate tubular member;a distal tip for only securably affixing the distal portions of the splines, said proximal anchor and said distal tip defining a longitudinal axis therein between about which the splines are disposed; and a second elongate tubular member having a lumen, a proximal end and a distal end; wherein the basket assembly is slidingly compressible within the lumen of the second elongate tubular member; wherein the splines comprise a superelastic material such that the basket assembly exhibits a substantially cylindrical shape when radially compressed within the second elongate tubular member and exhibits a radially expanded non-spherical shape when not radially compressed within the second elongate tubular member; delivering the system to the heart; sliding the basket assembly beyond the distal end of the second elongate tubular member, whereby the splines radially expand into the radially expanded non-spherical shape to dispose the basket assembly within a chamber of the heart; contacting proximal heart tissue within the chamber of the heart with the substantially all of exposed electrodes disposed on the proximal spline portions; observing the plurality of radiopaque markers under flurorscopy; detecting multiple local electric voltages with the exposed electrodes contacting the proximal heart tissue from endocardial surface thereat; contacting other heart tissue within the chamber of the heart with substantially all of the exposed electrodes disposed on the medial spline portions and the distal spline portions; detecting multiple local electric voltages with the exposed electrodes disposed on the medial spline portions and the distal spline portions contacting the other heart tissue from endocardial surface thereat. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification