User's Manual

Table Of Contents
Handling the lead withou t Connector Tool. For leads that require the use of a Connector Tool, use
caution handling the lead terminal when the Connector Tool is not present on the lead. Do not directly
contact the lead terminal with any surgical instruments or electrical connections such as PSA (alligator)
clips, ECG connections, forceps, hemostats, and clamps. This could damage the lead terminal, possibly
compromising the sealing integrity and result in loss of therapy or inappropriate therapy, such as a
short within the header.
Handling the terminal while tunneling. Do not contact any other portion of the DF4–LLHH or
DF4–LLHO lead terminal, other than the terminal pin, even when the lead cap is in place.
Do not contact any other portion of the IS4–LLLL lead terminal, other than the terminal pin, even when
the lead cap is in place.
Appropriate l ead connections. When implanting a system which uses both a DF4-LLHH/LLHO and
IS4-LLLL lead, ensure t hat the leads are inserted and secured in the appropriate ports. Inserting a lead
into an incorrect port will result in unanticipated device behavior (potentially leaving the patient without
effective therapy).
Programming and Device Operations
Atrial tracking modes. Do not use atrial tracking modes in patients with chronic refractory atrial
tachyarrhythmias. Tracking of atrial arrhythmias could result in ventricular tachyarrhythmias.
Atrial-only modes. Do not use atrial-only modes in patients with heart failure because such m odes do
not provide CRT.
Ventricular sensing. Left ventricular lead dislodgement to a position near the atria can result in atrial
oversensing and left ventricular pacing inhibition.
•SlowVT.Physicians should use medical discretion when implanting this device in patients who present
with slow VT. Programming therapy for slow monomorphic VT may preclude CRT delivery at faster rates
if these rates are in the tachyarrhythmia zones.
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