User's Manual

91
Rate Adaptation
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Figure 25: Updating the backup rate (rate fading), P=pacing, S=sinus rhythm
Four consecutive intrinsic sense events are necessary to activate rate
fading. Individual sense events do not affect rate fading.
Backup Rate Rate that the pacemaker uses to pace when there is a
sudden rate decrease. This can be a maximum of 10
ppm less than the intrinsic rate and follows the target
rate with an increase of 1,2,4, or 8 ppm per cycle, or
0.1...1 ppm per cycle if the target rate is less than the
current backup rate.
Target Rate The target rate is either the current detection rate
minus 10 ppm, or the sensor/basic rate. The backup
rate follows the target rate with the programmed rate
increase or decrease.
Table 8: Backup rate and target rate