User's Manual

82
Rate Adaptation
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Dynamic Runaway Protection
This parameter sets the pacing rate attainable during rest to a
programmable value,
1
for example 20 ppm, above the preset basic
rate. This suppresses any non-specific rate fluctuations at rest without
limiting the rate adaptation under mental stress. In cases where
runaway protection is not clinically appropriate, this feature can be
turned off.
The CLS Safety Feature
The pacemaker regularly checks internally that everything needed for
correct Closed Loop Stimulation is available. If one of these
requirements is not met, then Closed Loop Stimulation is interrupted,
and the pacing rate is lowered to the sensor rate. As soon as all
requirements are met, Closed Loop Stimulation automatically restarts.
The following events interrupt Closed Loop Stimulation:
• Automatic initialization of CLS
• Mode switching
• Ventricular fusion beats
• Inadequate impedance values
• Hardware and software errors
Automatic Initialization of Closed Loop Stimulation
CLS Standby Mode
Closed Loop Stimulation has been pre-installed and deactivated in the
implant, meaning CLS is in standby. Following auto-initialization, the
user is prompted to activate Closed Loop Stimulation or not (see the
section on “Auto-initialization” for more information).
1
The exact value depends on the ratio of the basic rate to the maximum Closed
Loop rate, see the “Technical Data” section on page 147.