Use Instructions

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10.5 Sensing
Through leads implanted in the heart, the OPTIMIZER Smart Mini IPG can sense, detect, and
analyze electrical signals generated by the heart. The signal input and controller circuitry of the
OPTIMIZER Smart Mini IPG are designed to receive these electrical signals, analyze the
characteristics of each signal (for example, magnitude and timing), and to determine whether or
not to deliver CCM therapy, if CCM therapy is to be delivered, and when to deliver it.
Note: The atrial (A) parameter settings are active only when the OPTIMIZER Smart Mini IPG is in
ODO-LS-CCM mode.
10.5.1 Sensing Leads
Right heart events are detected through two (or optionally three) sensing leads:
• Atrium (optional): lead placed in the right atrium (A)
• Ventricular 1: lead placed on the septum of the right ventricle (V)
• Ventricular 2: lead placed on the septum of the right ventricle (V)
10.5.2 Sensing Parameters
Sensitivity and polarity are the parameters determining how right heart events are
sensed.
• Sensitivity: To configure lead sensitivity, the OPTIMIZER Smart Mini
Programmer application provides the following settings:
o Atrium: Atrium sensitivity can be set to any one of 11 values between
0.3 mV and 5 mV.
o Ventricle 1 and 2: Ventricle sensitivity to set to any one of 16 values
between 0.3 mV and 10 mV.
Note: When the OPTIMIZER Smart Mini IPG is in OVO-LS-CCM mode, the
minimum allowable setting for the Ventricle sensitivity is 1 mV.
• Polarity: To configure lead polarity, the OPTIMIZER Smart Mini Programmer
application provides the following options:
o Bipolar: The signal is sensed between lead “tip” (distal electrode) and
“ring” (proximal electrode) of a bipolar lead.
o Unipolar: The signal is sensed between lead tip (distal electrode) and
the case of the OPTIMIZER Smart Mini IPG.
10.5.3 Post Ventricular A/V Refractory Periods
The Post Ventricular A/V Refractory Periods are the time intervals when the OPTIMIZER
Smart Mini IPG does not detect input events. The refractory periods are applicable to the
right heart sensing:
• Post-V Atrial Refractory Period: The time interval after a ventricular (RV) event
when signals sensed on the atrial lead are not acknowledged as atrial events.
With the OPTIMIZER Smart Mini Programmer application, the Post-V Atrial
Refractory Period can be set to values between 148.0 ms and 452.2 ms, in
7.8 ms increments.
Note: This parameter is active only when the OPTIMIZER Smart Mini IPG is in
ODO-LS-CCM mode.
• Post-V Ventricular (RV) Refractory Period: The time interval after a ventricular
(RV) event when signals sensed on the RV channel are not acknowledged as
ventricular (RV) events. With the OPTIMIZER Smart Mini Programmer
application, the Post-V Ventricular (RV) Refractory Period can be set to values
between 148.0 ms and 452.2 ms, in 7.8 ms increments.