BIOTRONIK Lumax DR ICD Series, Technical Manual, Page: 99 / 176

Lumax Technical Manual 91
2.9.6 IOPT
DR versions only
The IOPT function serves to support the patient’s intrinsic rhythm
and avoid excessive ventricular pacing. This feature simply
activates all of the AV hysteresis parameters with a single
selection. Table 26 details the settings that are preset when IOPT
is turned ON:
Table 26 IOPT Parameters
Parameter IOPT
AV Hysteresis (max AV Delay) 400 ms
AV Scan Hysteresis 5
Repetitive AV Hysteresis 5
2.9.7 Upper Tracking Rate
DR and HF versions only
In the atrial tracking modes (DDDR, VDDR, DDD, and VDD)
ventricular pacing tracks atrial pace/sense events. The maximum
tracking rate (ventricular pacing rate) is limited by the
Upper Rate
parameter.
The UTR response will automatically toggle between 2:1 and
WKB (Wenkebach) depending on the relative programmed values
for upper rate and atrial refractory period (AV Delay + PVARP).