Patent ID: 6055454
Filing Date: 2000-04-25
Classification: A61N

Abstract:
A rate-adaptive cardiac pacemaker, comprising:(a) physiologic rate sensor means for sensing a physiologic parameter indicative of metabolic demand in a patient and producing an electrical signal proportional to the metabolic demand;(b) second sensor means for sensing a parameter indicative of patient activity and producing an electrical signal proportional to the patient's level of activity;(c) controller means for generating a dynamic target rate based on averages of maximum peak values of the electrical signal from said second sensor means occurring during predetermined time intervals;(d) optimization means for automatically optimizing a rate response factor of said physiologic rate sensor means toward said dynamic target rate by a predetermined percentage if an average physiologic sensor rate is above or below the dynamic target rate; and(e) variable rate pulse generator means for stimulating said patient's heart based on the output from said optimization means.