User's Manual

Table Of Contents
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 Impedance Limits.
Recommended impedance range for the lead(s) being used, if available
The impedance value of a high or maximum energy shock impedance test
Shocking lead impedance readings between 20 and t he programmed High Impedance Limit are considered
in-range. If abrupt or large impedance uctuations or out-of-range conditions are observed, consider the
following:
Verify the conguration—ensure the programmed Shock Vector matches the conguration o f the
implanted lead (e.g., use RV Coil to Can with a single-coil lead).
Verify the connection—ensure the shocking lead’s terminal pins are placed in the correct lead ports
and verify a secure lead connection.
Verify the contact—ensure the device is inside a wet implant pocket since the pulse generator case
serves as an active electrode in the V-TRIAD conguration. Avoid pocket manipulation during the test.
Turn off sources of external noise (e.g., electrocautery equipment, m onitors).
Use other troubleshooting tools, as needed, to further assess lead system integrity, including electrogram
analysis, X-ray or uoroscopic image review, or internal visual inspection.
NOTE: Because this device uses a subthreshold test pulse to conduct shock lead impedance measurements,
it can be difcult to measure responses to test signals when electrical interference or “noise” (e.g.,
electrocautery or external m o nitoring equipment attached directly to the patient) is present during the test. This
may result in impedance measurement variations, particularly at implant. In the absence of such electrical
interference, shock lead impedance readings will be more stable.
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