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Chapter 5 Programmable Parameters
Evia HF / HF-T Technical Manual
PAGE 36
the Ax-Vs interval distributions over the Dynamic AV delay screen as a way of guiding AV delay and AV
Hysteresis delay programming. EasyAV neither modifies the programmed AV delay settings nor does it
make suggestions to the user.
Evia HF / HF-T provides statistical information about the As-Vs and Ap-Vs interval distribution, which
has been recorded in between in-house follow-ups for each patient. These statistics provide the range
as well as the median value of recorded As-Vs and Ap-Vs intervals for each of the rate marks 60, 80,
100, 120 and 140 bpm.
Evia HF / HF-T allows programming the AV delay settings individually for each of these rate marks 60,
80, 100, 120 and 140 bpm. EasyAV assists the user in programming the AV delay by displaying the
recorded statistical information about the As-Vs and Ap-Vs interval distribution within the user interface
for programming the AV delay settings ( see Figure 20 ). The recorded As-Vs and Ap-Vs interval
distribution is displayed separately to program the AV delay settings after As or Ap. In case no As-Vs
and Ap-Vs interval distributions are available, the user is informed that EasyAV is not available.
Figure 20: EasyAV
EasyAV allows the user to select AV delay settings based on the patient specific intrinsic conduction
without navigating to the diagnostic pages of the programmer. With respect to Evia HF / HF-T, the
user can ensure short enough AV delay settings to allow for the highest possible biventricular pacing
percentage.
5.5.5 Ventricular Blanking After Ap
The ventricular blanking after Ap (atrial pace) is the period after an atrial pacing pulse during which
ventricular sensing is deactivated. It is intended to prevent ventricular sensing of the atrial pacing pulse
(“crosstalk”). This parameter is programmable from 30 to 70 ms.