Patent US6354877B1 successfully refreshed from Google Patents.
EP0249824A1
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A cardiac pacer for pacing a heart
Assignee: Pacesetter AB
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Filing: 1987-06-04
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Granted: —
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Expires: 2007-06-04
Abstract
Abstract A cardiac pacer, which generates pacing pulses (15) at a predetermined pacing rate comprises a device (7) for realizing a body activity measurement. The measured body activity signal is non-linearly amplified in a manner that signal portions having higher amplitudes are more amplified than signal portions having lower amplitudes. Furthermore, the non-linearly amplified body activity signal is integrated over a period of time. Finally the predetermined pacing rate is varied dependent on the integrated signal.
Inventors
- 👤 Anders Lekholm
- 👤 David C. Amundson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 18:03
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/36514; A61N1/36521; Y; Y10; Y10S; Y10S128/00; Y10S128/902
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A cardiac pacer for pacing a heart comprising a) means (4) for generating pacing pulses at a predetermined pacing rate; b) means (2, 3) for transmitting the pacing pulses (15) to the heart for pacing; c) means (2, 8, 19; 17, 8, 19; 2, 4, 15, 19) for realizing a body activity measurement; d) means (9; 21, 22) for obtaining a body activity signal depending on the body activity measurement, said signal varying according to the body activity level; e) means (29) for non-linearly amplifying the body activity signal in a manner that signal portions having higher amplitudes are more amplified than signal portions having lower amplitudes; f) means (30) for integrating the non-linearly amplified body activity signal over a period of time; and g) means (5, 11) for varying the predetermined pacing rate dependent on the integrated signal.
Claim 2
Dependent Claim
139 words
A cardiac pacer for pacing a heart comprising a) means (4) for generating pacing pulses at a predetermined pacing rate; b) means (2, 3) for transmitting the pacing pulses (15) to the heart for pacing; c) means (2, 8, 19; 17, 8, 19; 2, 4, 15, 19) for realizing a body activity measurement; d) means (9; 21, 22) for obtaining a body activity signal depending on the body activity measurement, said signal varying according to the body activity level; e) means (29) for non-linearly amplifying the body activity signal in a manner that signal portions having higher amplitudes are more amplified than signal portions having lower amplitudes; f) means (30) for integrating the non-linearly amplified body activity signal over a period of time; and g) means (5, 11) for varying the predetermined pacing rate dependent on the integrated signal.
Claim 3
Dependent Claim
26 words
The cardiac pacer according to claim 1, wherein said means (29) for non-linear amplifying the body activity signal comprising means for squaring the body activity signal.
Claim 4
Dependent Claim
31 words
The cardiac pacer according to claim 1 or 2, wherein said integrating means (30) integrate said body activity signal over a time period in the range of 5 to 30 s.
Claim 5
Dependent Claim
22 words
The cardiac pacer according to one of the preceding claims 1 to 3, wherein said body activity signal is a respiratory signal.
Claim 6
Dependent Claim
30 words
The cardiac pacer according to claim 4, wherein said means (2, 8, 19; 17, 8, 19) for realizing a body activity measurement comprise means for realizing a body impedance measurement.
References Cited (Backward Citations)
US3593718A
Cited
EP0089014A2
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EP0135911A2
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EP0151689A2
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EP0249818A1
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EP0249821A1
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