Cardiac pacemaker
First Claim
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1. A cardiac pacemaker comprising:
- means for detecting an attribute of a patient'"'"'s body and transmitting a signal representative of said attribute;
circuitry means having stimulus supplying means for varying at least one pacing parameter, in particular the pacing rate, as function of said signal picked up in the patient'"'"'s body as an input variable and correlated with physical exertion of the patient'"'"'s body, a transmission route for said signals correlated with the physical exertion, and a non-linear transmission element in said transmission route; and
a transmission element in said transmission route which is linear and time-dependent, said transmission element including at least one of time constants and further coefficients, in accordance with a simulation of a linear physical system described by one of a linear differential equation, a time delay, and a predeterminable time-dependent course as an evaluation factor in control of said stimulus supplying means.
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Abstract
A cardiac pacer features plural adressable digital memory elements each containing different pulse parameters for the pacing stimulation, address-selecting digital logic circuitry for choosing the characteristics of the pulses to be generated in response to signals derived from plural physiological sensors detecting different exercise - related body function to improve control of the heart during various levels exertion.
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Citations
11 Claims
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1. A cardiac pacemaker comprising:
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means for detecting an attribute of a patient'"'"'s body and transmitting a signal representative of said attribute; circuitry means having stimulus supplying means for varying at least one pacing parameter, in particular the pacing rate, as function of said signal picked up in the patient'"'"'s body as an input variable and correlated with physical exertion of the patient'"'"'s body, a transmission route for said signals correlated with the physical exertion, and a non-linear transmission element in said transmission route; and a transmission element in said transmission route which is linear and time-dependent, said transmission element including at least one of time constants and further coefficients, in accordance with a simulation of a linear physical system described by one of a linear differential equation, a time delay, and a predeterminable time-dependent course as an evaluation factor in control of said stimulus supplying means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification