Catheter Systems for Cardiac Arrhythmia Ablation
First Claim
Patent Images
1. A device for ablating tissue in a body organ chamber, including heart chambers, comprising:
- (a) a guide body sheath having a deflectable distal end portion;
(b) a guidewire extendable from said distal end portion of said guide body to form a guidewire loop that is controllable to create forced contact with organ chamber tissue;
(c) an inflatable ablation balloon device mounted on a flexible guide shaft able to travel over said guidewire; and
(d) a loop control element for controlling the size, shape and disposition of said guidewire loop.
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Abstract
A plurality of catheter-based ablation apparatus embodiments are provided that address several areas of atrial target tissue and which feature firm and consistent ablation element to tissue contact enabling the creation of effective continuous lesions.
137 Citations
85 Claims
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1. A device for ablating tissue in a body organ chamber, including heart chambers, comprising:
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(a) a guide body sheath having a deflectable distal end portion; (b) a guidewire extendable from said distal end portion of said guide body to form a guidewire loop that is controllable to create forced contact with organ chamber tissue; (c) an inflatable ablation balloon device mounted on a flexible guide shaft able to travel over said guidewire; and (d) a loop control element for controlling the size, shape and disposition of said guidewire loop. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 57, 58, 59, 65, 66, 82, 83, 84, 85)
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- 4. A device for ablating tissue wherein said guide body further comprises an inflatable guide body balloon located at the distal portion thereof for preventing the guide body from retracting back through a penetrated chamber wall during a procedure.
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29. A device for ablating tissue in a cardiac chamber comprising:
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(a) a guide body sheath having a deflectable distal end portion; (b) a guidewire extendable from said distal end portion, said guidewire having a shaped distal anchoring section for anchoring said guidewire with respect to tissue to be ablated in a chamber; (c) an inflatable ablation balloon device selected from radio frequency and cryogenic balloon devices able to travel over said guidewire in an inflated or deflated state; and (d) a guidewire control element for controlling the extension of said guidewire. - View Dependent Claims (30, 31, 32)
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33. A device for ablating tissue in a cardiac chamber comprising:
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(a) a guide body sheath having a deflectable distal end portion; (b) a pair of malleable but relatively rigid pre-shaped torquable support sheath elements extendable from said distal end of said guide body sheath; and (c) a multi-electrode flexible recording/ablation catheter carried between and supported by said two support sheath elements such that the support sheath elements provide a stable anchor for applying said catheter exposed therebetween to tissue. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 60, 61, 62, 63)
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48. A device for ablating tissue comprising:
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(a) a guide body sheath having a deflectable distal end portion with an opening therein; (b) a guiding and recording catheter extendable from said distal end portion of said guide body having a J-shaped-type loop distal end portion provided with a plurality of recording elements; (c) an inflatable ablation balloon device designed to travel over said guiding and recording catheter device, said inflatable ablation balloon device being guided and stabilized by said guiding and recording catheter device; and (d) a control element for controlling the extension of said guiding and recording catheter from said guide body sheath. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56)
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67. A method of creating circumferential linear lesions by ablation in an organ chamber of interest comprising:
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(a) providing a device for ablating tissue comprising; 1) a guide body sheath having a deflectable distal end portion; 2) a guidewire extendable from said distal end portion of said guide body to form a guidewire loop that is controllable to create forced contact with organ chamber tissue; 3) an inflatable ablation balloon device able to travel over said guidewire; and 4) a loop control element for controlling the size, shape and disposition of said guidewire loop; (b) expanding and adjusting said guidewire loop in said organ chamber until it is tightly contacting the wall of said chamber; and (c) inflating said balloon and tracking said balloon catheter along said guidewire loop incrementally while using said balloon to ablate tissue at a plurality of positions to create a circumferential lesion in said organ chamber. - View Dependent Claims (68, 69, 70, 71, 72, 79, 80, 81)
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73. A method of ablating tissue to create isolation lesions at orifice interfaces between blood vessels and an organ chamber comprising:
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(a) providing an ablation device comprising; 1) a guide body sheath having a deflectable distal end portion with an opening therein; 2) a guiding and recording catheter extendable from said distal end portion of said guide body sheath having a J-shaped-type loop distal end portion provided with a plurality of recording electrodes; 3) an inflatable ablation balloon device designed to travel over said guiding catheter device, said inflatable ablation balloon device being guided and stabilized by said guiding catheter; and 4) a control element for controlling the extension of said guiding and recording catheter from said guide body; (b) extending said guiding and recording catheter and steering it into the orifice of a blood vessel of interest; (c) causing said ablation balloon to travel over said guiding and recording catheter until it is situated in the orifice of said vessel of interest; (d) using said ablation balloon to ablate tissue at the orifice of said vessel of interest; and (e) recording the local electrogram to determine the efficacy and maturation of the ablation. - View Dependent Claims (74, 75)
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76. A method of ablating tissue and creating linear lesions between orifices of a plurality of vessels interfacing an organ chamber comprising:
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(a) providing a device for ablating tissue comprising; 1) a guide body sheath having a deflectable distal end portion; 2) a pair of malleable but relatively rigid pre-shaped torquable support sheath elements extendable from said distal end of said guide body; and 3) a multi-electrode flexible recording/ablation catheter carried between and supported by said two extendable support sheath elements such that the support sheath elements can provide a stable anchor for said catheter exposed therebetween; (b) adjusting said torquable support sheath elements and inserting them into a pair of vessel orifices, the multi-electrode flexible recording/ablation catheter being pressed against the tissue therebetween; and (c) using said recording/ablation catheter to create a lesion between said orifices. - View Dependent Claims (77, 78)
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Specification