User Manual

Lumax Technical Manual 81
Table 29: Left Ventricular Sensitivity Settings
Setting Definition for Use
Standard This setting is recommended for all
patients with a functioning left ventricular
lead.
Inactive This setting deactivates the left ventricular
channel for sensing, EGM telemetry and
Holter recording and is typically used when
no LV lead is implanted.
2.3.6 Minimum Left Ventricular Threshold
This parameter limits the minimum sensitivity of the CRT-D to a
programmable value. Nominally, the minimum threshold is set to
0.8 mV, but it can be adjusted from 0.5 to 5.0 mV.
2.3.7 Far Field Protection
DR and HF versions only
This parameter blanks the atrial channel of the ICD/CRT-D to the
period before and after each ventricular event. This blanking
period is programmable separately based on whether the
ventricular event is a paced or sensed event and is designed to
prevent sensing of ventricular signals with the atrial leads.
CAUTION
Far-field sensing of signals from the atrium in the
ventricular channel or ventricular signals in the atrial channel
should be avoided by appropriate lead placement,
programming of pacing/sensing parameters, and maximum
sensitivity settings. If it is necessary to modify the Far Field
Blanking parameter, the parameter should be lengthened
only long enough to eliminate far-field sensing as evidenced
on the IEGMs. Extending the parameter unnecessarily may
cause undersensing of actual atrial or ventricular events.
2.3.8 Additional Sensing Parameters
The parameters of the Additional Sensing Parameters menu are
to provide additional flexibility for physicians to non-invasively
correct over/undersensing situations. The ranges and nominal
values are located in the Technical Specifications in Section
6.