User Manual

13. DEVICE DESCRIPTION
13. DEVICE DESCRIPTION
The INTENSIA CRT-D system includes the model 174 ICD device and programming system.
The programming system includes the Sorin dedicated programmer with the SMARTVIEW
programming software connected to a CPR3 programming head. The programming system
is configured and furnished by Sorin.
The INTENSIA CRT-D 174 can serve as a defibrillation electrode (active housing) with a
total surface area of 76 cm².
The INTENSIA CRT-D 174 is designed to recognize and treat slow or fast VT and VF by
continuously monitoring atrial and ventricular activity to identify persistent ventricular
arrhythmias and to deliver appropriate therapies. INTENSIA CRT-D 174 features the
PARAD/PARAD+ algorithm, which is specifically designed to differentiate ventricular
tachycardias from fast rhythms of supraventricular origin. PARAD/PARAD+ continuously
monitors R-R interval stability, searches for long cycles, assesses the degree of P-R
association, evaluates sudden onset and determines the chamber of arrhythmia
acceleration.
In addition to the advanced detection scheme, INTENSIA CRT-D 174 offers programmable
single, dual or triple-chamber pacing therapy (DDD, DDI, VVI or SafeR (AAI <> DDD)
modes) with or without rate-responsive capabilities (DDDR, DDIR, VVIR, DDD/DDIR and
SafeR-R (AAIR <> DDDR) modes) using an acceleration sensor. An automatic AV delay
algorithm as well as a mode switching function are available.
INTENSIA CRT-D 174 enables an adjustment of the interventricular delay, and provides the
possibility of adapting pacing to each ventricle. The ICD is intended to resynchronize
uncoordinated contraction of the heart by simultaneously or sequentially pacing both
ventricles.
INTENSIA CRT-D 174 offers tiered therapy. Therapies can be programmed independently in
each zone:
─ in the Slow VT and VT zones: two ATP programs, up to two shocks with programmable
energy and up to four shocks with maximum energy can be programmed;
─ in the VF zone: one ATP program, up to two shocks with programmable energy and up
to four shocks with maximum energy can be programmed.
The ATP can be applied in RV, LV or RV and LV pacing with a VV delay equal to 0 ms. ATP
pacing configuration is independent of ventricular pacing configuration.
When the rhythm changes from one zone to another, the device delivers the therapy
programmed in this zone, starting with the same or more aggressive program for the area.
The ATP program in the VF zone will only be applied if the VT coupling interval is longer
than the programmed fast VT cycle length.
The INTENSIA CRT-D 174 offers biphasic shocks with a maximum stored energy of 42 J.
The shock configuration (electrodes used to apply the shock) can be chosen by
programming one of the following combinations: can and one coil, can and two coils, two
coils only.
Other features are as follows:
─ Automatic ventricular sensitivity control
─ Non-committed shocks
─ Electrophysiological studies (EPS) with real-time markers or electrograms:
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SORIN – INTENSIA CRT-D 174 – U151A