User Manual

15. SPECIAL MODES
15. SPECIAL MODES
15.1. SAFETY MODE (NOMINAL VALUES)
Nominal values may be rapidly restored by pressing the following button on the
programming head or programmer keyboard:
or via the Emergency button on the SMARTVIEW screen.
In safety mode, the defibrillator operates with the parameters underlined in the table of
programmable parameters.
15.2. MAGNET MODE
When the magnet is applied:
─ antiarrhythmia functions are inhibited (detection of rhythm disturbances, charging, and
therapy),
─ hysteresis, VV delay and AVD paced/sensed offset are set to 0,
─ pacing amplitude is set to 6 V,
─ pulse width is set to maximum,
─ pacing rate is set to the magnet rate,
─ the following functions are disabled: ventricular arrhythmia prevention, Mode Switch,
Anti-PMT, Smoothing, Rate Response.
When the magnet is removed:
─ the sensor rate is forced to the basic rate,
─ arrhythmia detection algorithms and sequential therapies are reinitialized,
─ therapies start with the least aggressive program for each area.
The other parameters remain at their programmed value, including the ventricular paced
chamber parameter.
The magnet rate values are as follows:
Magnet rate (bpm) 96 94 91 89 87 85
Magnet period (ms) 625 641 656 672 688 703
Magnet rate (bpm) 83 82 80 78 77
Magnet period (ms) 719 734 750 766 781
15.3. RESPONSE IN THE PRESENCE OF INTERFERENCE
If the defibrillator senses electrical noise at a frequency above 16 Hz, it switches to an
asynchronous mode at the basic rate. The programmed mode is restored as soon as the
noise is no longer detected.
Ventricular pacing is also inhibited by ventricular noise. It can be restored by setting the
parameter V pacing on noise to Yes.
SORIN – INTENSIA SonR CRT-D 184 – U150A
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