BIOTRONIK Lumax DR ICD Series, Technical Manual, Page: 101 / 176

Lumax Technical Manual 93
2.9.8 Mode Switching
DR and HF versions only
Mode switching is designed to avoid tracking of atrial arrhythmias.
In the presence of a high atrial rate, the bradycardia pacing mode
is automatically reprogrammed to a non-atrial tracking mode. The
modes available during mode switching are as shown in
Table 27 . Mode switching is not available during the post-shock
pacing period. Mode Switching is only available with the Lumax
DR and Lumax HF ICDs/CRT-Ds.
Table 27: Mode Switching Modes
Programmed Mode Converted Mode
DDDR
DDIR
DDI
DDD
DDIR
DDI
VDDR
VDIR
VDI
VDD
VDIR
VDI
Mode switching is initiated in atrial tracking modes when the atrial
rate, defined by the programmable mode switch
Intervention
Rate is achieved. However, mode switching will not occur until
the Mode Switch Activation Criteria is also met. The activation
criterion is a programmable X out of 8 high rate intervals as
programmed. RVsense Triggering can be programmed separately
during mode switching.
After switching to a non-atrial tracking mode, the ICD/CRT-D
activates a
Y out of 8 counter that deactivates mode switching
when Y number of cardiac cycles out of the last 8 are below the
Intervention Rate. When this
Deactivation Criteria parameter is
fulfilled, the ICD/CRT-D returns to the normal programmed pacing
mode.