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EP0096464A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Exercise responsive cardiac pacemaker

Assignee: Purdue Research Foundation
•
Filing: 1983-05-05
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Granted: —
•
Expires: 2003-05-05
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Abstract

Abstract An exercise-responsive cardiac pacemaker is provided which physiologically controls the stimulation rate of a heart by sensing the venous blood temperature in the right ventricle of the heart. A temperature sensing means which includes a thermistor produces an output signal which is sent to an algorithm implementing means for implementing the output signal by an algorithm which represents the mathematical function between venous blood temperature in the right ventricle and heart rate in a normally functioning heart. The algorithm implementing means produces an output signal which is variable between a maximum and minimum level corresponding to the desired maximum and minimum levels of heart rate in a normally functioning heart. The algorithm implementing means is also programmable by telemetry after implantation. A cardiac pacemaker is connected to the algorithm implementing means and is responsive thereto in order to variably control the stimulation rate of the heart.

Inventors

  • 👤 William A. Cook
  • 👤 Neal E. Fearnot
  • 👤 Leslie A. Geddes

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 09:50
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/365; A61N1/36514; A61N1/3655

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 119 words
A cardiac pacemaker including means for variably controlling the stimulation rate of the heart according to the level of muscular exertion in the body, comprising: a temperature sensing means for sensing a non-ambient body temperature, said non-ambient body temperature related by an algorithm to heart rate in a normally functioning heart, said temperature sensing means producing an output signal; an algorithm implementing means connected to said .temperature sensing means for implementing said output signal by an algorithm which represents the mathematical function between said non-ambient body temperature and heart rate in a normally functioning heart; and a cardiac pacemaker connected to said algorithm implementing means and responsive thereto in order to variably control the stimulation rate of said heart.
Claim 2
Dependent Claim 119 words
A cardiac pacemaker including means for variably controlling the stimulation rate of the heart according to the level of muscular exertion in the body, comprising: a temperature sensing means for sensing a non-ambient body temperature, said non-ambient body temperature related by an algorithm to heart rate in a normally functioning heart, said temperature sensing means producing an output signal; an algorithm implementing means connected to said .temperature sensing means for implementing said output signal by an algorithm which represents the mathematical function between said non-ambient body temperature and heart rate in a normally functioning heart; and a cardiac pacemaker connected to said algorithm implementing means and responsive thereto in order to variably control the stimulation rate of said heart.
Claim 3
Dependent Claim 39 words
The cardiac pacemaker of claim 1, wherein said algorithm implementing means output signal is variable between a maximum and minimum level corresponding to or within the desired maximum and minimum levels of heart rate in a normally functioning heart.
Claim 4
Dependent Claim 14 words
The cardiac pacemaker of claim 2, wherein said temperature sensing means senses blood temperature.
Claim 5
Dependent Claim 22 words
The cardiac pacemaker of claim 3, wherein said temperature sensing means senses venous blood temperature in the right ventricle of said heart.
Claim 6
Dependent Claim 24 words
The cardiac pacemaker of claim 4, wherein said algorithm implementing means is programmable by telemetry after said cardiac pacemaker is implanted in said body.
Claim 7
Dependent Claim 26 words
The cardiac pacemaker of Claim 5, wherein said temperature sensing means includes a thermistor, a thermocouple, a semiconductor junction or an optical liquid crystal temperature sensor.

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