User Manual

Table Of Contents
Lumax Technical Manual 139
The IEGMs may be transmitted to the programmer via the
programming wand positioned over the implanted pulse
generator. The surface ECG is continuously displayed in the
Overview screen, the Sensing screen and the EP test functions
module. Real-time IEGMs are available in the EP tests and
sensing/impedance screens. They are then displayed together
with surface ECG and markers on the programmer screen and
printed on the ECG recorder. Likewise, intracardiac signals and
markers identifying atrial/ventricular paced and sensed events are
received via the programming wand, and may be displayed on the
programmer screen and printed on the ECG recorder.
To determine the amplitudes of intracardiac signals (P-/R-waves)
the automatic P/R-wave measurement function may be used.
Please refer to the appropriate software technical manual for a
description of marker signal operation.
2.11.5 Capacitor Reforming
Shock charge times may be prolonged if the high voltage
capacitors remain uncharged for an extended period of time.
Conditioning (or reforming) the capacitors by periodically charging
them will help assure shorter charge times for those patients that
do not regularly receive shock therapy. The Lumax devices
automatically re-form the capacitors after every 3 months. The
capacitor reformation clock is reset following an automatic or
manual capacitor reform. Any device initiated maximum charging
of the high voltage capacitors also resets the automatic
reformation clock (i.e., shock therapies).
An automatic or manually initiated capacitor reform fully charges
the capacitors and then allows the capacitors to discharge into an
internal resistor. No shock will be delivered to the patient.
Throughout the re-formation process the ICD/CRT-D will provide
bradycardia pacing support and tachyarrhythmia sensing and
detection as programmed. If a tachyarrhythmia is detected during
capacitor reformation, the process is aborted and therapy is
available if required.