Patent ID: 6522924
Filing Date: 2003-02-18
Classification: A61N,C01P

Abstract:
A cardiac pacemaker comprising:a pulse generator for generating a stimulation pulse and a measurement pulse; at least one stimulation electrode arranged in the region of the heart in signal communication with the pulse generator and designed to output stimulation pulses to the heart; at least one sensor means arranged at the myocardium and adapted to detect a myocardial impedance pattern immediately after the cessation of a stimulation pulse and still within the diastolic phase of the heart in response to the measurement pulse; and a control unit having at least one output connected to the pulse generator for controlling the stimulation pulse output of the pulse generator, at least one input connected to the at least one sensor means for detecting a successful stimulation of the heart by monitoring the myocardial impedance pattern, the control unit being adapted to control stimulation pulse output of the pulse generator based on the variations in impedance in the myocardial impedance pattern.