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Chapter 5 Programmable Parameters
Evia HF / HF-T Technical Manual
PAGE 13
5. Programmable Parameters
For a complete list of programmable parameters and the available settings, see Section 13.
5.1 Pacing Modes
A complete list of pacing modes available in Evia HF / HF-T is shown below.
Figure 1: Pacing Modes in Evia HF / HF-T
NOTE:
Ventricular Capture Control is only available with the following pacing modes: DDD-CLS, VVI-CLS,
DDDR, VDDR, VVIR, DDD, VDD, VVI, DDD-ADI, and DDDR-ADIR.
5.1.1 Motion Based Rate-Adaptive Modes
The motion based rate-adaptive modes are designated with an “R” in the fourth position of the NBG
pacemaker code on the programmer screen. The rate-adaptive modes function identically to the
corresponding non-rate-adaptive modes, except that the basic rate increases when physical activity is
detected by the motion sensor.
In demand modes (DDDR, DDIR, DVIR, VDDR, VVIR, AATR, VVTR, VDIR, AAIR), it is possible that
the atrial and/or ventricular refractory period can comprise a major portion of the basic interval at high
sensor-modulated rates. This may limit the detection of spontaneous events or even exclude their
recognition altogether. Further details of this potential occurrence are provided in Section 5.5.1.
5.1.2 CLS Modes
As explained in the device description, Evia CRT-P also can be programmed to use a unique rate-
adaptive principle called Closed Loop Stimulation (CLS) to adapt the patient’s pacing rate.
The Evia CRT-P measures electrical impedance by injecting a small AC current between the pulse
generator case and the ventricular electrode tip. The induced voltage (which is proportional to the
intracardiac impedance) is also measured between pulse generator case and ventricular electrode tip.