
Lumax Technical Manual 9
Shipment Mode –
The shipment mode is a factory set mode that
controls the charge current of automatic capacitor reformations.
This mode controls the charge current to avoid temporary low
battery readings. The shipment mode is automatically
deactivated as soon as electrophysiological tests (e.g.,
Impedance measurement) have been performed. To ensure
delivery of programmed shock energy, make sure shipment mode
is disabled prior to completion of implant procedure.
Shock Therapy Confirmation
– Programming CONFIRMATION
to OFF may increase the incidence of the ICD/CRT-D delivering
inappropriate shocks.
Shock Impedance
- If the shock impedance is less than twenty-
five ohms, reposition the lead system to allow a greater distance
between the electrodes. Never implant the device with a lead
system that has measured shock impedance as less than twenty-
five ohms. Damage to the device may result.
Negative AV Hysteresis
– This feature insures ventricular
pacing, a technique which has been used in patients with
hypertrophic obstructive cardiomyopathy (HOCM) with normal AV
conduction in order to replace intrinsic ventricular activation. No
clinical study was conducted to evaluate this feature, and there is
conflicting evidence regarding the potential benefit of ventricular
pacing therapy for HOCM patients. In addition, there is evidence
with other patient groups to suggest that inhibiting the intrinsic
ventricular activation sequence by right ventricular pacing may
impair hemodynamic function and/or survival.
1.4.3 Lead Evaluation and Connection
Capping Leads
- If a lead is abandoned rather than removed, it
must be capped to ensure that it is not a pathway for currents to
or from the heart.
Gripping Leads
- Do not grip the lead with surgical instruments
or use excessive force or surgical instruments to insert a stylet
into a lead.
Kinking Leads
- Do not kink leads. This may cause additional
stress on the leads that can result in damage to the lead.
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