User's Manual

51
Pacing and Sensing Functions

To this end, up to 4 stimuli of 4.8 V are triggered every 1.5 hours in
order to be able to determine the impedance under defined conditions.
If an amplitude higher than 4.8 V is set, the measurement is conducted
with the preset amplitude. Impedances between 200-3000 Ohm are
considered.
Automatic Lead Check
When this function is activated, the lead impedance is automatically
measured with every pace. If the impedance values lie above or below
the limits for several consecutive measurements, the system
automatically switches from a bipolar to a unipolar lead configuration.
The event is stored in an impedance trend. In the case of unipolar
configuration and a measurement outside the limits, the automatic
lead check is deactivated. In both cases, a message is generated that
is displayed at the next follow-up when the pacemaker is interrogated.
The automatic lead check can be activated for both the atrium and the
ventricle. The selected mode must provide for pacing in the selected
chamber.