User's Manual

10 Introduction
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• Innovative rate hysteresis promotes the patient’s own cardiac
rhythm and avoids unnecessary overdrive pacing.
• AV hysteresis features support intrinsic conduction and hence the
natural contraction process.
• The night program adjusts the pacing rate to the reduced metabolic
needs of the patient while resting at night.
• The regular automatic lead impedance check triggers the switch
from a bipolar to unipolar pacing mode when values outside the
normal range occur.
• Automatic sensor features make it easier to adjust pacemaker
parameters to the individual needs of the patient.
• The Rate Fading function ensures that the heart rate does not drop
abruptly when the intrinsic rate suddenly decreases. Rather, the
rate is gradually reduced until the basic or sensor rate has been
reached.
• IEGM recordings provide insight into the events before a
tachycardic phase.
• Extensive memory functions (such as the histogram, rate trend,
activity chart, etc.) facilitate evaluation of the state of the patient
and the pacemaker.
• Atrial and ventricular extrasystoles as well as atrial tachycardias can
be analyzed and classified with respect to their complexity and
when they occur.
• An external pulse control function is available for terminating atrial
tachycardias and for use during electrophysiologic studies. Burst
stimulation, with realtime control of the burst rate, and
programmed stimulation, with up to 4 extrastimuli, are available.