User Manual

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116 Lumax Technical Manual
With each As and As (PVARP), a VES discrimination interval is
started in the ventricle. If a ventricular sensed event occurs within
the discrimination interval, this event is interpreted as a Vs
(ventricular sensed event), and no PVARP after VES protection
interval is started.
In the factory setting, the VES discrimination after As is set to
350 ms (programmable: 250…(50)…450 ms in Lumax 300/340 &
500/540 models and up to 500 ms in the Lumax 600/640 &
700/740 models). The VES/As terminates with each ventricular
event.
If a ventricular event does not fall within the AV delay or the VES
discrimination interval, it is classified as a VES. A ventricular
event that is sensed within the VES discrimination interval, but
outside the AV delay, starts a VA delay after which an atrial pace
is delivered.
2.9.11 Rate-Adaptive Pacing
WARNING
Rate-Adaptive Pacing – Use rate-adaptive pacing with care
in patients unable to tolerate increased pacing rates.
Lumax ICD/CRT-D allows the selection of rate-responsive pacing
modes. These modes allow the ICD/CRT-D’s bradycardia therapy
function to adapt the pacing rate to increasing or decreasing
patient physical activity, based on data collected from a motion
based sensor within the ICD/CRT-D. Separately programmable
criteria allow the clinician to control the rate of increase and
decrease of pacing, as well as the sensitivity of the sensors in
response to motion.