Patent EP0491649A2 successfully refreshed from Google Patents.
EP0491649A2
Expired / Lapsed
EP
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Apparatus for producing configurable biphasic defibrillation waveforms
Assignee: Ventritex Inc
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Filing: 1991-12-12
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Granted: —
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Expires: 2011-12-12
Abstract
Abstract A programmable implantable medical device utilizable for delivering a configurable defibrillation waveform to a heart. The device includes defibrillation electrode means adapted to be connected to the heart for delivering a multiphasic defibrillation waveform thereto. A programmable waveform generator connected to the heart generates the multiphasic waveform such that at least one phase of the defibrillation waveform has programmed constant tilt.
Inventors
- 👤 Benjamin Pless
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/38; A61N1/39; A61N1/3956; A61N1/3906; A61N1/3912
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
76 words
A programmable implantable medical device utilizable for delivering a defibrillation waveform to a heart, the implantable medical device comprising: (a) defibrillation electrode means adapted to be connected to the heart; (b) waveform generator means connected to the defibrillation electrode means for generating the defibrillation waveform, the defibrillation waveform including at least one constant tilt pulse; and (c) programmable means connected to the waveform generator means for determining the constant tilt of the at least one pulse.
Claim 2
Dependent Claim
112 words
An implantable medical device utilizable for delivering a configurable biphasic defibrillation waveform to a heart, the medical device comprising: (a) charge storage means; (b) charging means for charging the storage means to an initial selected voltage; (c) control means for initiating delivery of a first defibrillation pulse of a first polarity to the heart when the storage means stores the initial selected voltage; (d) trailing voltage detector means for monitoring the decay of the voltage of the charge storage means during delivery of the first defibrillation pulse; and (e) programmable disable means for terminating the first defibrillation pulse when the voltage of the charge storage means decays to a programmed decay voltage.
Claim 3
Dependent Claim
106 words
An implantable medical device as in claim 2 wherein the control means includes means for initiating delivery of a second defibrillation pulse of a second polarity to the heart when the voltage of the charge storage means decays to the programmed decay voltage and the trailing voltage detector means includes means for monitoring the decay of the voltage of the charge storage means from the programmed decay voltage to a final decay voltage during delivery of the second defibrillation pulse, and the disable means includes means for terminating the second defibrillation pulse when the voltage of the charged storage means decays to the final decay voltage.
Claim 4
Dependent Claim
15 words
An implantable medical device as in claim 3 wherein the final decay voltage is programmable.
Claim 5
Dependent Claim
90 words
An implantable medical device as in claim 2 wherein the control means includes means for initiating delivery of a second defibrillation pulse of a second polarity to the heart when the voltage of the charge storage means decays to the programmed decay voltage and further comprising: (a) timer means for measuring the duration of the first defibrillation pulse; and (b) means for delivering a second defibrillation pulse of a second polarity to the heart, the second defibrillation pulse having a duration corresponding to the duration of the first defibrillation pulse.
Claim 6
Dependent Claim
18 words
An implantable medical device as in claim 5 wherein the duration of the second defibrillation pulse is programmable.
References Cited (Backward Citations)
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