US6522905B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for cardiac ablation
Assignee: Catheffects Inc
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Filing: 2001-08-06
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Granted: 2003-02-18
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Expires: 2021-08-06
Abstract
Abstract A system and method for cardiac mapping and ablation include a multi-electrode catheter introduced percutaneously into a subject's heart and deployable adjacent to various endocardial sites. The electrodes are connectable to a mapping unit, an ablation power unit a pacing unit, all of which are under computer control. Intracardiac electrogram signals emanated from a tachycardia site of origin are detectable by the electrodes. Their arrival times are processed to generate various visual maps to provide real-time guidance for steering the catheter to the tachycardia site of origin. In another aspect, the system also include a physical imaging system which is capable of providing different imaged physical views of the catheter and the heart. These physical views are incorporated into the various visual maps to provide a more physical representation. once the electrodes are on top of the tachycardia site of origin, electrical energy is supplied by the ablation power unit to effect ablation.
Inventors
- 👤 Jawahar M. Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; A61B5/6858; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287; A61B5/74; A61B5/742; A61B5/743; A61B6/00; A61B6/46; A61B6/461; A61B6/464; A61B6/52; A61B6/5211; A61B6/5229; A61B6/5235
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
177 words
A cardiac catheterization system for operation on an endocardium of a subject's heart, comprising: a cluster of electrodes disposable by a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; a storage for storing the detected intracardiac electorgram signals accumulated site-by-site; a computer to derive from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and means for interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 2
Dependent Claim
177 words
A cardiac catheterization system for operation on an endocardium of a subject's heart, comprising: a cluster of electrodes disposable by a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; a storage for storing the detected intracardiac electorgram signals accumulated site-by-site; a computer to derive from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and means for interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 3
Dependent Claim
50 words
A cardiac catheterization system as in claim 1 , further comprising: a power supply switchably supplying power to at least one of said cluster of electrodes when said at least one of said cluster of electrodes is placed substantially coincident with the tachycardia site of origin to ablate there at.
Claim 4
Dependent Claim
28 words
A cardiac catheterization system as in claim 2 , wherein said power supply supplies radio frequency power of different phases to different electrodes among said cluster of electrodes.
Claim 5
Dependent Claim
32 words
A cardiac catheterization system as in claim 1 , further comprising: a physical imager displaying at least one view of a physical image of said cluster of electrodes relative to the heart.
Claim 6
Dependent Claim
76 words
A cardiac catheterization system as in claims 4 , further comprising: means for synthesizing said map with said at least one view from said physical imager to produce at least one synthesized video display showing at least one view of said physical image of said cluster of electrodes relative to the heart and an estimated tachycardia site of origin, thereby providing direct visual guidance for steering the cluster of electrodes to the tachycardia site of origin.
Claim 7
Dependent Claim
40 words
A cardiac catheterization system as in any one of claims 1 - 5 , wherein said computer further computes contours of equal arrival time or isochrones; and said map includes isochrones computed from arrival times derived from existing detected sites.
Claim 8
Dependent Claim
36 words
A cardiac catheterization system as in any one of claims 1 - 5 , wherein said map further includes an interactive track of said cluster of electrodes as it scans along a path on the endocardium.
Claim 9
Dependent Claim
175 words
A cardiac catheterization system for operation on an endocardium of a subject's heart, comprising: a cluster of electrodes disposable by a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; means for storing the detected intracardiac electorgram signals accumulated site-by-site; means for deriving from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and means for interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 10
Dependent Claim
175 words
A cardiac catheterization system for operation on an endocardium of a subject's heart, comprising: a cluster of electrodes disposable by a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; means for storing the detected intracardiac electorgram signals accumulated site-by-site; means for deriving from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and means for interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 11
Independent Claim
170 words
A method of cardiac catheterization for operation on an endocardium of a subject's heart, comprising: disposing a cluster of electrodes of a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; storing the detected intracardiac electorgram signals accumulated site-by-site; deriving from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 12
Independent Claim
170 words
A method of cardiac catheterization for operation on an endocardium of a subject's heart, comprising: disposing a cluster of electrodes of a catheter about the endocardium site-by-site; each electrode detecting intracardiac electrogram signals including that emanating from a tachycardia site of origin; storing the detected intracardiac electorgram signals accumulated site-by-site; deriving from each said detected intracardiac electrogram signals an arrival time thereof and to form a map based on the arrival times derived from existing detected sites; and interactively displaying said map, said map including locations of existing detected sites and a current location of said cluster of electrodes, whereby those electrodes being closer to the tachycardia site of origin than others will be in a region of said map having earlier arrival times than others, and electrodes that are substantially coincident with the tachycardia site of origin will be in a region of said map having an earliest possible arrival time, thereby said map providing guidance for moving said cluster of electrodes towards the region having earlier arrival times.
Claim 13
Dependent Claim
47 words
A method of cardiac catheterization as in claim 9 , further comprising: supplying power to at least one of said cluster of electrodes when said at least one of said cluster of electrodes is placed substantially coincident with the tachycardia site of origin to ablate there at.
Claim 14
Dependent Claim
34 words
A method of cardiac catheterization as in claim 10 , wherein said power is in the form of radio frequency power of different phases being supplied to different electrodes among said cluster of electrodes.
Claim 15
Dependent Claim
33 words
A method of cardiac catheterization as in claim 9 , further comprising: physically imaging and displaying at least one view of a physical image of said cluster of electrodes relative to the heart.
Claim 16
Dependent Claim
75 words
A method of cardiac catheterization as in claim 12 , further comprising: synthesizing said map with said at least one view from said physical imager to produce at least one synthesized video display showing at least one view of said physical image of said cluster of electrodes relative to the heart and an estimated tachycardia site of origin, thereby providing direct visual guidance for steering the cluster of electrodes to the tachycardia site of origin.
Claim 17
Independent Claim
41 words
A method of cardiac catheterization as in any one of claims 9 - 13 , further comprising: computing contours of equal arrival time or isochrones; and displaying said map with said isochrones computed from arrival times derived from existing detected sites.
Claim 18
Independent Claim
37 words
A method of cardiac catheterization as in any one of claims 9 - 13 , further comprising: displaying said map with an interactive track as said cluster of electrodes is scanning along a path on the endocardium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-02-17 | 2006-08-19 | 2007-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-17 | 2010-08-19 | 2011-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-17 | 2014-08-19 | 2015-02-18 | $7700.00 | Window Closed / Lapsed |