Use Instructions

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Valid Local Sense events detected outside the Alert Window are considered to be PVCs
and inhibit CCM therapy delivery for a programmable number of cycles. Inhibiting Local
Sense events can be detected even between a triggering Local Sense event and the start
of the corresponding CCM therapy, which in this case will not be delivered.
The Local Sense Alert Window is the time interval during which the leading-edge of valid
LS events is used to trigger CCM therapy delivery.
The position in time of this window is determined by two programmable parameters:
• LS Alert Start: The start of the time interval during which a valid LS event must
be sensed in order to trigger the delivery of CCM therapy. Using the OPTIMIZER
Smart Mini Programmer application, Alert Start can be set to values between
-100 ms and 100 ms, in 2 ms increments.
Note: The Alert Window starts inside the AV interval if this value is negative.
• LS Alert Width: The time interval duration in which a valid LS event must be
sensed in order to trigger the delivery of CCM therapy. Equivalent to the duration
of the Alert Window. Using the OPTIMIZER Smart Mini Programmer application,
the Alert Width can be set to values between 1 ms and 40 ms, in 1 ms
increments. If the sum of Alert Start and Alert Width is negative, the Alert Window
ends inside the AV interval.
Note: When the OPTIMIZER Smart Mini IPG is in OVO-LS-CCM mode, the
maximum allowable setting for this parameter is 30 ms.
The leading edge of the first event detected within this window is used to trigger CCM
therapy delivery. When an event is detected, the Local Sense Alert Window is
immediately closed. Any Local Sense events detected after the window closes are
considered to lie outside the Alert Window and lead to the LS Out of Alert Status.
If a Local Sense event is detected outside the Alert Window, CCM therapy delivery is
always inhibited.
10.7.4 Local Sense Blanking Refractory Periods
Local Sense (LS) Blanking Refractory Periods allows for the masking of signals (e.g.,
noise) that may be detected before or after an atrial, RV, or LS event.
The LS Blanking Refractory parameters are the following:
• Pre A Refractory Period: The time interval before the atrial event where all atrial
signals are masked from detection. With the OPTIMIZER Smart Mini
Programmer application, the duration can be set to values between 0 ms and
55 ms, in 5 ms increments.
Note: This parameter is active only when the OPTIMIZER Smart Mini IPG is in
ODO-LS-CCM mode.
• Post A Refractory Period: The time interval after the atrial event where all atrial
signals are masked from detection. With the OPTIMIZER Smart Mini
Programmer application, the duration can be set to values between 0 ms and
55 ms, in 5 ms increments.
Note: This parameter is active only when the OPTIMIZER Smart Mini IPG is in
ODO-LS-CCM mode.
• Pre RV Refractory Period: The time interval before the RV event where all
signals are masked from detection. With the OPTIMIZER Smart Mini
Programmer application, the duration can be set to values between 0 ms and
55 ms, in 5 ms increments.
• Post RV Refractory Period: The time interval after the RV event where all
signals are masked from detection. With the OPTIMIZER Smart Mini
Programmer application, the duration can be set to values between 0 ms and
39 ms, in 1 ms increments.