Chapter 5 Programmable Parameters
Evia HF / HF-T Technical Manual
PAGE 28
5.4.1 Ventricular Pacing Parameter Options
Ventricular Pacing
BiV, RV
Ventricular pacing allows the user to program BiV or RV only pacing, depending on the patient
condition. The choice of BiV pacing in this screen applies only to pacing in the permanent pacing
mode. Pacing choices for Mode Switch are found in those respective feature areas.
Triggering
OFF, RVs, RVs + PVC
This feature permits triggered pacing when RV sensed events occur, as long as the RV sensed rate
does not exceed the Maximum Triggered Rate. When set to the default of AUTO, the trigger rate
will be equal to the Upper Tracking Rate +20 bpm. When programmed to RVs and PVC, the device
triggers on RVs event, as well as extra systoles (PVC or VES), as long as the rate does not violate the
Maximum Trigger Rate.
LV T-wave Protection
ON or OFF
If LV T-wave protection has been activated, Evia HF / HF-T will detect LVs events and start a left
ventricular maximum trigger interval (equal to the upper tracking Interval in ms when programmed to
Auto). This feature prevents the delivery of a LV paced event whenever a LV sensed event occurs
rst. It is also designed to prevent pacing into the sensed refractory period and potentially triggering a
tachyarrhythmia. When LV T-wave protection is programmed ON, the device will provide LVs statistics
and accurate LVp percentages. If LV T-wave protection is off, LVs data is not collected by the device.
Maximum Trigger Rate
Auto, 90 … (10) … 160 ppm
This feature sets the maximum triggered pacing rate to a programmed value, including values above
the UTR. The Auto setting is equivalent to the programmed Upper Tracking Rate (UTR) and will
automatically change the trigger rate to match changes in UTR programming. Trigger rate pacing
applies to permanent pacing and Mode Switch.
Initially paced chamber
LV, RV
Allows the user to program which chamber paces rst.
V-V delay after Vp (ms)
0...(5)...100 ms
This parameter allows the user to program the interval between paced events.
V-V delay after Vs (ms)
0 ms
When Trigger pacing is programmed to one of the active modes, the Evia HF / HF-T will deliver a LV
pace when an RVs and/or PVC below the maximum trigger rate.
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