User's Manual

16. MAIN FUNCTIONS
16. MAIN FUNCTIONS
16.1. AUTOMATIC LEAD MEASUREMENTS
Automatic pacing lead impedance measurement:
A lead impedance measurement is automatically performed on atrial and ventricular leads
every 6 hours. The daily mean impedance is stored for each chamber.
Automatic coil impedance measurement:
A continuity measurement is automatically performed on defibrillation coil(s) once per day.
The continuity is stored for each coil.
Automatic sensing measurement:
The amplitude of P and R waves are automatically measured at each cycle. Every 8.5
minutes, the amplitude of the last 8 P and R detections are averaged and stored.
16.2. ATRIAL TACHYARRHYTHMIA MANAGEMENT
Mode Switch:
This function is designed to limit the acceleration and variation of ventricular rate in the
presence of atrial arrhythmia.
16.3. VENTRICULAR TACHYARRHYTHMIA MANAGEMENT
Ventricular tachyarrhythmia prevention:
Set of algorithms that can be used to avoid the circumstances of ventricular tachyarrhythmia
onset.
Arrhythmia discrimination algorithm PARAD and PARAD+ (P And R based Arrhythmia
Detection):
PARAD is the algorithm used to discriminate sinus tachycardias (ST) and supraventricular
tachycardias (SVT) from ventricular tachycardias (VT).
PARAD+ is based on the PARAD algorithm but additionally takes into account the
“AFdetect” discrimination criteria: the occurrence of a "long ventricular cycle" characteristic
for AF patients which is an additional arrhythmia classification criterion to improve
identification of atrial fibrillation and avoid inappropriate shocks.
Fast VT treatment:
Applies detection criteria on fast ventricular tachycardia that are different from those of the
VT zone, as well as different therapies. The fast VT zone is included in the VF zone: its
lower limit is determined by the programmed value for the VF zone and its upper limit by the
programmed value for the fast VT zone.
Polarity alternation on Max shock:
Reverses the programmed polarity of every second shock set at maximum energy. The
number, type, and energy of shocks is independently programmable by detection zone.
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SORIN – PLATINIUM CRT-D – U459A