BIOTRONIK Evia HF - AV Delay; Dynamic AV Delay

Chapter 5 Programmable Parameters
Evia HF / HF-T Technical Manual
PAGE 31
5.5.4 AV Delay
Maximum AV Delay Programmable Value 350 ms
Maximum AV Delay Programmable Value
with AV Hysteresis
450 ms
I-Opt AV Delay maximum
3
400 ms
Lower Rate AV Delay Upper Rate AV Delay
Low 150 ms 120 ms
Medium 150 ms 75 ms
High 150 ms 50 ms
4
Fixed 150 ms 150 ms
Individual User Dened User Dened
AV Delay Settings (Default for BiV programming)
Evia CRT-P provides three preset AV Delay settings: Low, Medium and High. In addition, the user
can program a xed AV Delay, as well as a user-dened program (Individual). Similar to previous
generations of devices, Evia CRT-P allows the user to program individual AV Delay programs. Evia
CRT-P adds the option of changing the values on the AV Delay visual display in addition to changing
the numeric parameter buttons. By placing the pen over the “o” on the display, the user can slide the
value up or down to increase or decrease the AV Delay setting for a particular rate bin.
5.5.4.1 Dynamic AV Delay
The AV delay denes the interval between an atrial paced or sensed event and the ventricular pacing
pulse. If the pulse generator is programmed to a dual chamber sensing mode, an intrinsic ventricular
event falling within the AV delay will inhibit the ventricular pacing pulse. If not contraindicated, a longer
AV delay can be selected to increase the probability of ventricular output pulse inhibition. Short AV
delays are available for testing purposes or if ventricular pre-excitation is desired (i.e., hemodynamic
considerations).
Dynamic AV Delay provides independent selection of AV Delays from ve rate ranges at pre-set AV
Delay values. In addition, the AV Delay after atrial pace events can be differentiated from the AV interval
after atrial sense events for dual chamber pacing modes. Dynamic AV Delay is programmable within
the following atrial rate ranges at the values specied in Table 7.
3 I-Opt available in the Evia HF-T if RV only pacing if programmed
4 Conict with Sense compensation will arise as a minimum of 15 ms AV Delay is required