04926863 is referenced by 74 patents and cites 4 patents.

An implantable variable rate pacemaker adaptive to patient exercise detects movements of the patient, and discriminates between detected movements indicative of true physical exercise by the patient and detected movements which are not true physical exercise. An activity sensor converts mechanical movements of the patient to an electrical signal representative thereof. Only a portion of the electrical signal in a frequency range below 4 Hz is processed by the pacemaker's electrical circuitry, to discriminate against signal components arising from other than physical exercise of the patient. As a result of this signal processing, a predetermined variable signal component is recovered, other than frequency of amplitude crossings relative to a threshold value, to produce an output signal representative of true physical body exercise. The pacemaker responds to this output signal by generating pulses at a rate that varies depending on the predetermined signal component, to stimulate the patient's heart at a rate according to the state of true physical exercise of the patient.

Title
Rate responsive cardiac pacemaker
Application Number
7/94875
Publication Number
4926863
Application Date
September 10, 1987
Publication Date
May 22, 1990
Inventor
Eckhard Alt
Munich
DE
Agent
Leitner Greene & Christensen
Assignee
Intermedics
TX, US
IPC
A61N 1/00
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