Pressure and heart movement sensor for heart stimulators

A pressure and heart movement sensor for a heart stimulator comprising:

• an electrode system adapted for implantation in an ambient body medium and having an electrode cable containing an outer coiled electrical conductor and an inner coiled electrical conductor disposed inside said outer coiled electrical conductor leading to electrode poles;
• and
• measurement means for measuring impedance, which varies as said electrode cable is subjected to pressure, between said outer coiled electrical conductor and said ambient body medium and for generating an output signal corresponding to said impedance.

A pressure and heart movement sensor comprising:

• an electrode system adapted for implantation in an ambient body medium and having an electrode cable containing at least one electrical conductor leading to one electrode pole;
• and
• measurement means for measuring impedance which varies as said electrode cable is subjected to pressure, between said conductor and said ambient body medium and for generating an output signal corresponding to said impedance, said measurement means including a measurement oscillator having a frequency which changes dependent on said impedance.