User's Manual

Table Of Contents
CAUTION: Take care to ensure that artifacts from the ventricles are not present on the atrial channel, or
atrial oversensing may result. If ventricular artifacts are present in the atrial channel, the atrial lead may
need to be repositioned to minimize its interaction.
3. Evaluate all lead impedances.
CAUTION: If total shocking lead impedance during implant is less than 20 , verify the proximal coil is not
in contact w ith the pulse generator surface. A measurement of less than 20 is an indication of a short
somewhere in the system. If repeated measurements show the total shocking lead impedance is less than
20 , the lead and/or pulse generator may need to be replaced.
The High Impedance Limit is nominally set to 2000 , and is programmable between 2000 and 3000 in
250 increments. The Low Impedance Limit is nominally set to 200 , and is programmable between 200
and 500 in 50 increments. Consider the following factors when choosing a value f or the High and Low
Impedance Limits:
For chronic leads, historical im pedance measurements for the lead, as well as other electrical
performance indicators such as stability over time
For newly implanted leads, t he starting measured impedance value
NOTE: Depending on lead maturation effects, during follow-up testing the physician may choose to reprogram
the High or Low Impedance Limits.
Pacing dependence of the patient
Recommended impedance range for the lead(s) being used, if available
The Shock Low Impedance Limit is xed at 20 . The Shock High Impedance Limit is nominally set to 125
, and is programmable between 125 and 200 in 25 increments. Consider the following factors when
choosing a value for the High Impedance Limits:
For chronic leads, historical im pedance measurements for the lead, as well as other electrical
performance indicators such as stability over time
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