User's Manual

125
Handling and Implantation
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If the pacing rate only decreases when a magnet is applied, then the
replacement indication has not yet been reached but may be expected
shortly.
The replacement indication will also be displayed by the programmer
when interrogating the pacemaker and will appear in a data printout.
For a detailed description of the replacement indication and the
expected service times, please refer to the section entitled
"Replacement Indication."
The battery condition can also be tested by using analog data
telemetry. Nevertheless, the point of reference for replacement
indication is always the basic rate.
Activation of ERI Detection
ERI detection is automatically activated when one of the following
conditions occurs:
• Auto-initialization was successfully executed
• The programmer measures a lead impedance smaller than 3200
Ohm
• The pacemaker is stored for longer than 24 months
• The safe program was successfully transmitted
Testing the Pacing Threshold
To facilitate follow-up, the pacemakers feature a high-resolution
threshold test with a resolution of 0.1V in the range of 0.1V to 4.8V.
The ventricular threshold test can be performed manually or
automatically. The prerequisites for an automatic threshold test in the
ventricle are as follows:
— A ventricular rate of < 100 bpm
— Adequate signal quality
— The implant is not set to mode switching
The pulse amplitude for the permanent program is selected based on
the measured threshold and under consideration of the safety margin.