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Stratos LV/LV-T Technical Manual 7
1.5.3 Lead Connection and Evaluation
Lead Check –
Feature Description
: Lead Check is a feature that, when
activated, automatically measures the lead impedance with
every pace. Based on these measurements, the lead
configuration will be set to either unipolar or bipolar. Refer to
Section 2.5 for more details regarding this feature.
Caution
: Lead check will not lead to disabling of cardiac
resynchronization therapy. It limits the use of the
resynchronization features.
1. Lead check is possible only when the right ventricle is
paced first.
2. Lead check works only when the pacing voltages are
programmed between 2.4 and 4.8 V. The lead check
feature can be programmed OFF in patients that require
cardiac resynchronization therapy.
Care should be taken when programming Stratos CRT-Ps with
Lead Check ON as the device may switch from bipolar to
unipolar pacing and sensing without warning. This situation may
be inappropriate when using a Stratos CRT-P for patients with
an Implantable Cardioverter Defibrillator (ICD). The following
associated message appears when programming this feature:
“Lead check may result in a switch to unipolar pacing and
sensing, which may be inappropriate for patients with an
ICD.”
Additionally, Lead Check should be programmed OFF before
lead connection as the feature will automatically reprogram the
device to unipolar in the absence of a lead.
Lead / CRT-P Compatibility – Because of the numerous
available 3.2-mm configurations (e.g., the IS-1 and VS-1
standards), lead/ CRT-P compatibility should be confirmed with
the CRT-P and/or lead manufacturer prior to the implantation of
the system.