Patent ID: 6519494
Filing Date: 2003-02-11
Classification: A61N

Abstract:
A rate-adaptive cardiac pacemaker comprising:sensor means having an output, the sensor means being designed for detecting at least one measurement parameter in the body of a patient related to the circulation function; stimulation means having an input, the stimulation means being designed for producing and outputting stimulation pulses at a stimulation control rate to the heart of the patient; and rate control means connected between the sensor means output and the stimulation means input, for controlling the stimulation control rate in a dependence on the at least one measurement parameter, the rate control means further including an adjusting device: the adjusting device: adapted to alter the dependence of the stimulation control rate on the at least one measurement parameter by applying at least one adjusting parameter to the dependence, wherein the at least one adjusting parameter is based on the physical condition of the patient and wherein the dependence is adjusted during a stable state of low or medium physical load on the body, and the adjusting device further including: state detecting means for detecting the state of physical load on the body by comparing a property of the at least one measurement parameter with a predetermined criteria.