Impulse Dynamics OPTIMIZER Smart Mini Instructions For Use Manual page 130

When running an LS Scan, the OPTIMIZER Smart IPG is set to a special mode in which LS
signals are sampled every 2 ms throughout a 200 ms interval centered at the right-ventricular
event. These signals are sent to the Intelio Programmer to be displayed in the Local Sense Scan
window as histograms.
Local Sense scans can be performed either manually or automatically.
Run a Local Sense by performing one of the following steps:
1. Use the Manual button to acquire a LS histogram for a specific LS sensitivity selected
through the Sensitivity parameter.
2. Use the Automatic button to start a process that scans through various LS Sensitivity
values.
When the automatic scans are completed, all collected histograms appear in the Local Sense
Scan screen. The operator can then select the most appropriate sensing threshold.
The sensitivity used to accrue sensing data for one histogram is the LS Sensitivity parameter
that appears on the right-part of the window.
By acquiring these samples for different LS Sensitivity values, the timing of the LS event relative
to the right-ventricular event is clearly demonstrated. The LS Scan results should be interpreted
as follows:
•
Blue bars in the histogram indicate that the LS signal was sensed more than the number
of times indicated by the Events per Bar parameter.
Note: For lower values of LS sensing threshold (higher sensitivity), signals other than the LS may
be detected. For example, using Figure 114, an appropriate value for the LS Sensitivity
parameter would be 5.0 mV.
Figure 113: LS Scan Screen
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