User Manual

Table Of Contents
14. SPECIAL MODES
NOMINAL MODE (SAFETY MODE)
Safety settings may be rapidly restored by pressing the Emergency button below: via the
MicroPort dedicated programmer screen, the programming head or the MicroPort dedicated
programmer keyboard.
In nominal mode, the pacemaker operates with the parameters from the table of
programmable parameters.
STANDBY MODE
In the event of self-test failure, the pacemaker switches automatically to a safe mode of
operation known as standby mode. In most cases, normal pacemaker operation may be
re-established (if the pacemaker is at a stabilized temperature of approximately 37°C) by
confirming the reinitialization function suggested by the MicroPort dedicated programmer. If
this is not the case, contact your MicroPort representative.
In standby mode, the pacemaker operates with the following parameters: VVI, 70 ppm, 5 V,
0.5 ms, sensitivity 2.2 mV, unipolar for the DR model and the SR model when implanted in
the ventricle or AAI for the SR model when implanted in the atrium.
Programming is then impossible and test modes, including magnet mode, are ineffective.
MAGNET MODE
When a magnet is applied, the pacemaker terminates the cycle in progress and operates
using the following parameters:
Mode
DOO (if mode programmed: Dxx or SafeR for the DR model only)
VOO (if mode programmed: Vxx)
AOO (if mode programmed: Axx)
Rate Magnet rate
Pulse amplitude 5 V (or greater if the programmed amplitude value is greater)
Pulse width 0.5 ms (or greater if the programmed pulse width value is greater)
AV delay (for the DR
model only)
Rest AV delay
On exiting magnet mode, the device operates:
for 6 cycles by pacing at the magnet rate, with an AV delay of 95 ms (if applicable and for
the DR model only), with the programmed amplitude and pulse width in asynchronous
mode,
then for 2 cycles with the programmed parameters in asynchronous mode.
RESPONSE IN THE PRESENCE OF INTERFERENCE
If the pacemaker senses electrical noise at a frequency above 20 Hz, it switches to an
asynchronous mode at the basic rate. The programmed mode is restored as soon as the
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14.4.
14. SPECIAL MODES
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