US4768512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardioverting system and method with high-frequency pulse delivery
Assignee: Mirowski Family Ventures LLC
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Filing: 1986-05-13
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Granted: 1988-09-06
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Expires: 2006-05-13
Abstract
Abstract An implantable cardioverting system wherein a cardioverting or defibrillating voltage is automatically applied across implantable electrodes associated with the heart of a patient. The cardioverting voltage is an exponentially-decaying voltage pulse that is chopped, or broken, at high frequencies to provide a voltage wave packet formed of a plurality of high-frequency cardioverting pulses. The voltage is provided by an internal storage capacitor coupled across implantable electrode leads that is charged to a predetermined voltage level. Upon discharge, an electronic switch is clocked at frequencies preferably in excess of 1 KHz to open and close the circuit formed of the storage capacitor and electrodes.
Inventors
- 👤 Mir Imran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:40
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
In a cardioversion system for automatically cardioverting the heart of a patient including a storage capacitor, a means for charging the storage capacitor to a predetermined voltage level, a means for discharging the storage capacitor, and a pair of implantable electrodes connectable with said storage capacitor whereby the discharge of the storage capacitor provides an exponentially decaying voltage across said electrodes, wherein the improvement comprises: chopping means for electrically connecting said storage capacitor with said implantable electrodes at a predetermined frequency for chopping the exponentially decaying voltage across said implantable electrodes.
Claim 2
Dependent Claim
91 words
In a cardioversion system for automatically cardioverting the heart of a patient including a storage capacitor, a means for charging the storage capacitor to a predetermined voltage level, a means for discharging the storage capacitor, and a pair of implantable electrodes connectable with said storage capacitor whereby the discharge of the storage capacitor provides an exponentially decaying voltage across said electrodes, wherein the improvement comprises: chopping means for electrically connecting said storage capacitor with said implantable electrodes at a predetermined frequency for chopping the exponentially decaying voltage across said implantable electrodes.
Claim 3
Dependent Claim
46 words
The cardioversion system as claimed in claim 1 wherein said chopping mean comprises an electronic switch connected in series between said storage capacitor and said implantable electrodes, and clocking means coupled with said electronic switch for opening and closing the electronic switch at a predetermined frequency.
Claim 4
Dependent Claim
17 words
The cardioversion system as claimed in claim 2 wherein said electronic swtich comprises a field effect transistor.
Claim 5
Dependent Claim
42 words
An implantable cardioversion system for automatically cardioverting the heart of a patient, comprising: detecting means for detecting arrhythmias of the heart; cardioverting means responsive to said detecting means for delivering to the heart at least one wave packet of high-frequency cardioverting pulses.
Claim 6
Dependent Claim
42 words
An implantable cardioversion system for automatically cardioverting the heart of a patient, comprising: detecting means for detecting arrhythmias of the heart; cardioverting means responsive to said detecting means for delivering to the heart at least one wave packet of high-frequency cardioverting pulses.
Claim 7
Dependent Claim
26 words
The implantable cardioverter of claim 4 wherein said cardioverting means includes means for delivering high-frequency cardioverting pulses at a frequency between 10 KHz and 1 MHz.
Claim 8
Dependent Claim
26 words
The implantable cardioverter of claim 5 wherein said cardioverting means includes means for delivering high-frequency cardioverting pulses at a frequency between 10 KHz and 1 MHz.
Claim 9
Independent Claim
50 words
A method of automatically cardioverting the heart of a patient through implantable electrodes comprising the steps of: detecting an arrhythmic condition of the heart; automatically cardioverting the heart in response to detecting the arrhythmia by delivering at least one cardioverting wave packet of high-frequency cardioverting pulses across the implantable electrodes.
Claim 10
Independent Claim
50 words
A method of automatically cardioverting the heart of a patient through implantable electrodes comprising the steps of: detecting an arrhythmic condition of the heart; automatically cardioverting the heart in response to detecting the arrhythmia by delivering at least one cardioverting wave packet of high-frequency cardioverting pulses across the implantable electrodes.
Claim 11
Dependent Claim
20 words
The method of claim 7 wherein said delivering step comprising delivering an exponentially-decaying voltage wave packet of high-frequency cardioverting pulses.
Claim 12
Dependent Claim
35 words
The method of claim 7 wherein said cardioverting step comprises the steps of coupling a voltage of sufficient magnitude to depolarize the heart across the implantable electrodes and chopping the voltage at a predetermined frequency.
Claim 13
Dependent Claim
21 words
The method of claim 9 wherein said coupling step includes the step of coupling a charged capacitor across the implantable electrodes.
References Cited (Backward Citations)
US3614955A
Cited
US4222386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |