Patent ID: 7328067

Claim:
A system coupled to a plurality of cardiac regions, comprising: an electrode system including a plurality of electrodes to provide connections to the plurality of cardiac regions; control circuitry including a pacing output circuit, coupled to the electrode system, to generate electrical pulses to be delivered to a first electrode of the electrode system, the pacing output circuit configured to allow sensing of evoked responses each directly evoked by one of the electrical pulses delivered to the first electrode; an evoked response sensing amplifier to sense the evoked responses; and one or more switches to connect one or more electrodes of the electrode system to the evoked response sensing amplifier for sensing the evoked responses from each of the plurality of cardiac regions, wherein the control circuitry is adapted to conduct a threshold test determining a plurality of pacing threshold values each associated with one cardiac region of the plurality of cardiac regions and associated with the electrical pulses delivered to the first electrode.