User's Manual

40
Timing Functions
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Dynamic AV Delay
Valid for Cylos DR and
Cylos DR-T
The AV delay defines the period of time between an atrial event and the
subsequent ventricular stimulus. The "dynamic" AV delay lets you
optimize the AV delay for five different atrial rate ranges. The AV delay
selected for this rate is then effective depending on the current atrial
rate (the A-A interval). The dynamic AV delay is valid after atrial
detection and after sensor-driven atrial pacing. The AV delay can be
individually set for the following rate ranges:
Basic rate, < 70 ppm, 70 – 90 ppm, 91 – 110 ppm, 111 – 130 ppm, >
130 ppm.
In the non-rate-adaptive modes, an AV delay may be separately
selected for AV-sequential pacing at the basic rate. The AV delays in
the four other atrial rate ranges are then only active after the
corresponding atrial sensing.
In addition to the option of setting the AV delay individually for these
ranges, the programmer also offers three settings (low, medium and
high). Refer to the table below for details. You can deactivate the
optimization feature and select fixed AV delays. In non-rate-adaptive
modes, the AV delay after atrial pace events is different from the AV
delay after atrial sense events.