US6246909B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable cardiac stimulator wherein the pacing rate is controlled dependent on variations in the spontaneous interval
Assignee: Pacesetter AB
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Filing: 1997-10-02
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Granted: 2001-06-12
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Expires: 2017-10-02
Abstract
Abstract An implantable stimulating device for electrical stimulation of a heart has a stimulus generator which generates electrical stimuli and at least one lead for delivering the stimuli from the generator to the heart. A measurement unit detects spontaneous intervals between successive intrinsic heartbeats, and forms an average of at least five of these spontaneous intervals. A variation with respect to this average for later spontaneous intervals is then identified, and this variation is then used to control a pacing parameter of the stimulus generator.
Inventors
- 👤 Christer Ekwall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:16
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
An implantable stimulating device for electrical stimulation of a heart, comprising: a stimulus generator which generates electrical pacing stimuli; at least one lead connected to said stimulus generator and adapted to deliver said pacing stimuli from said stimulus generator to a heart; measuring means connected to said lead for measuring respective spontaneous intervals between successive intrinsic heartbeats and for identifying a variation of an average of at least five latest spontaneous intervals of said spontaneous intervals; and a control unit supplied with said variation from said measuring means for controlling a pacing control parameter of said stimulus generator dependent on said variation.
Claim 2
Dependent Claim
102 words
An implantable stimulating device for electrical stimulation of a heart, comprising: a stimulus generator which generates electrical pacing stimuli; at least one lead connected to said stimulus generator and adapted to deliver said pacing stimuli from said stimulus generator to a heart; measuring means connected to said lead for measuring respective spontaneous intervals between successive intrinsic heartbeats and for identifying a variation of an average of at least five latest spontaneous intervals of said spontaneous intervals; and a control unit supplied with said variation from said measuring means for controlling a pacing control parameter of said stimulus generator dependent on said variation.
Claim 3
Dependent Claim
24 words
A stimulating device according to claim 9 wherein said control parameter is controlled in dependence from the value of only said time interval variation.
Claim 4
Dependent Claim
19 words
A stimulating device according to claim 1 wherein said control parameter controls a hysteresis interval of said placing stimuli.
Claim 5
Dependent Claim
16 words
A stimulating device according to claim 1 wherein said control parameter controls a maximum stimulation rate.
Claim 6
Dependent Claim
62 words
A stimulating device according to claim 1 wherein said measuring means comprises a detector connected to the connection lead which detects said time interval, a memory connected to said detector for storing a predetermined number of latest detected time intervals, and a calculator for calculating and producing signals representative of the spontaneous interval variation, said calculator using said latest detected time intervals.
Claim 7
Dependent Claim
37 words
A stimulating device as claimed in claim 1 wherein said measuring means calculates said time interval variation by determining a difference between a largest value and a smallest value of a predetermined number of said time intervals.
Claim 8
Dependent Claim
27 words
A stimulating device according to claim 1 said measuring means calculates said timer interval variation by determining a variance of a predetermined number of said time intervals.
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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) | 2004-06-11 | 2004-12-11 | 2005-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-11 | 2008-12-11 | 2009-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-11 | 2012-12-11 | 2013-06-12 | $7700.00 | Window Closed / Lapsed |