US5607385A
Expired / Lapsed
US
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Device and algorithm for a combined cardiomyostimulator and a cardiac pacer-carioverter-defibrillator
Assignee: Medtronic Inc
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Filing: 1995-08-17
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Granted: 1997-03-04
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Expires: 2015-08-17
Abstract
Abstract A device and algorithm for a combined cardiomyostimulator and a cardiac pacer-cardioverter-defibrillator. In particular the present device operates, in a first embodiment, to deliver stimulation to a skeletal muscle grafted about a heart; sense depolarizations of a patient's heart; measure the intervals separating successive depolarizations of the patient's heart; define first and second interval ranges; determine the number of the measured intervals falling within the first and second interval ranges; inhibit the delivery of stimulation to a skeletal muscle grafted about a heart upon the sensing of a depolarization within the first or second interval range; detect the occurrence of a first type of arrhythmia when the number of the measured intervals falling within the first interval range equals a first predetermined value; detect the occurrence of a second type of an arrhythmia when the number of the intervals falling within the second interval range equals a second predetermined value; deliver a first type of arrhythmia therapy in response to the detection of the first arrhythmia; and deliver a second type of arrhythmia therapy in response to the detection of the second arrhythmia, the second type of arrhythmia therapy having a cardiac stimulation component and a skeletal muscle component.
Inventors
- 👤 David Francischelli
- 👤 Kendra K. Gealow
- 👤 Pierre A. Grandjean
- 👤 John Hammargren
- 👤 Johann J. Neisz
- 👤 David K. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:24
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3621; A61N1/36042; A61N1/38; A61N1/39; A61N1/3956; A61N1/3962; A61N1/39622
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
248 words
An apparatus for stimulating a skeletal muscle grafted about a heart, detecting cardiac events and delivering therapeutic stimulation to the heart comprising: means for delivering stimulation to a skeletal muscle grafted about a heart; means for sensing depolarizations of a patient's heart; means for measuring the intervals separating successive depolarizations of the patient's heart; means for defining first and second interval ranges; means for determining the number of the measured intervals falling within the first and second interval ranges; means for inhibiting the means for delivering stimulation to a skeletal muscle grafted about a heart upon the sensing of a depolarization within the first or second interval range; first means for detecting the occurrence of a first type of arrhythmia when the number of the measured intervals falling within the first interval range equals a first predetermined value; second means for detecting the occurrence of a second type of an arrhythmia when the number of the intervals falling within the second interval range equals a second predetermined value; means for delivering to the patient's heart a first type of arrhythmia therapy in response to the detection of the first arrhythmia by the first detecting means; and means for delivering to the patient's heart and to the skeletal muscle grafted about the heart a second type of arrhythmia therapy in response to the detection of the second arrhythmia by the second detecting means, the second type of arrhythmia therapy having a cardiac stimulation component and a skeletal muscle component.
Claim 2
Independent Claim
248 words
An apparatus for stimulating a skeletal muscle grafted about a heart, detecting cardiac events and delivering therapeutic stimulation to the heart comprising: means for delivering stimulation to a skeletal muscle grafted about a heart; means for sensing depolarizations of a patient's heart; means for measuring the intervals separating successive depolarizations of the patient's heart; means for defining first and second interval ranges; means for determining the number of the measured intervals falling within the first and second interval ranges; means for inhibiting the means for delivering stimulation to a skeletal muscle grafted about a heart upon the sensing of a depolarization within the first or second interval range; first means for detecting the occurrence of a first type of arrhythmia when the number of the measured intervals falling within the first interval range equals a first predetermined value; second means for detecting the occurrence of a second type of an arrhythmia when the number of the intervals falling within the second interval range equals a second predetermined value; means for delivering to the patient's heart a first type of arrhythmia therapy in response to the detection of the first arrhythmia by the first detecting means; and means for delivering to the patient's heart and to the skeletal muscle grafted about the heart a second type of arrhythmia therapy in response to the detection of the second arrhythmia by the second detecting means, the second type of arrhythmia therapy having a cardiac stimulation component and a skeletal muscle component.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1 wherein the means for delivering first and second intervals comprise means for defining first and second intervals which are adjacent and non-overlapping.
Claim 4
Dependent Claim
39 words
An apparatus according to claim 1 wherein the means for delivering the second type of arrhythmia therapy comprises means for delivering a defibrillation pulse and means for delivering a defibrillation stimulation to the skeletal muscle grafted about the heart.
Claim 5
Dependent Claim
24 words
An apparatus according to claim 1 wherein the means for delivering a first type of arrhythmia therapy comprises means for delivering antitachycardia pacing pulses.
Claim 6
Dependent Claim
27 words
An apparatus according to claim 1 further comprising means for defining a third interval range, the third interval range encompassing intervals larger than the first interval range.
Claim 7
Dependent Claim
37 words
An apparatus according to claim 1 further comprising means for detecting a third type of arrhythmia and means for initiating a third type of arrhythmia therapy in response to the detection of the third type of arrhythmia.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 6 wherein the third type of arrhythmia therapy comprises bradycardia pacing pulses.
Claim 9
Dependent Claim
56 words
An apparatus according to claim 1 wherein the means for delivering the second type of arrhythmia therapy further comprises: means for temporarily storing energy; means for charging the means for temporarily storing energy; means for re-initiating delivering stimulation to a skeletal muscle grafted about a heart during the charging of the means for temporarily storing energy.
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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) | 2000-03-03 | 2000-09-02 | 2001-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-03 | 2004-09-02 | 2005-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-03 | 2008-09-02 | 2009-03-04 | $7700.00 | Window Closed / Lapsed |