A multi-sensor system for controlling an implantable heart stimulator, and
an implantable heart stimulator containing such a multi-sensor system,
have a piezoelectric pressure sensor adapted for placement in the blood
stream of a subject, the piezoelectric pressure sensor having at least one
electrode that is adapted for electrical contact with the blood stream,
and an oxygen pressure sensor having a measurement electrode formed by the
(at least one) electrode of the piezoelectric pressure sensor.