Patent ID: 6697672
Filing Date: 2004-02-24
Classification: A61N

Abstract:
An implantable heart stimulator comprising:a pulse generator which emits stimulation pulses adapted for delivery to a heart of a patient; an IEGM unit adapted to obtain and register electrical IEGM signals from the heart, said IEGM signals having waveforms associated therewith; a classifier connected to the IEGM unit for receiving the IEGM signals therefrom and for classifying the received IEGM signals according to their waveforms in at least one segment of a cardiac cycle, thereby producing classified IEGM signals, said classified IEGM signals containing beat-to-beat variability, and slow variability extending over several cardiac cycles; a filter connected to said classifier and supplied with said classified IEGM signals, said filter extracting parameters related to respiration of the patient from said beat-to-beat variability in the classified IEGM signals and filtering out said slow variability; and a control unit supplied with said parameters and connected to said pulse generator for controlling delivery of said stimulation pulses from said pulse generator dependent on said parameters.