User's Manual

US-ENGLISH – 51
16.4. PACING
BTO (Brady Tachy Overlap): Corrects chronotropic atrial
incompetence by allowing pacing in the slow VT zone, without
affecting detection specificity.
Post-shock mode: After any automatic shock therapy, the post-
shock mode makes it possible to apply a pacing mode other than the
standard antibradycardia pacing mode and/or with different pacing
parameters.
SafeR (AAI <> DDD) mode: Is intended to minimize deleterious
ventricular pacing. The defibrillator functions in AAI mode, and
temporarily switches to DDD mode upon the occurrence of AVB III,
AVB II, AVB I and ventricular pause.
Anti-PMT protection: Is intended to protect the patient from
Pacemaker-Mediated Tachycardia (PMT) without reducing atrial
sensing capability of the device.
16.5. SENSING
Automatic Refractory Periods: Optimize sensing and make the
implant progamming easier. These periods are composed of a
minimal Refractory Period and a triggerable Refractory Period. The
duration of the refractory periods lengthens automatically as needed.
Committed period: 1. In DDI or DDD modes, the committed period
is a non-programmable 95 ms ventricular relative refractory period
that starts with atrial pacing. If a ventricular event is sensed during
the committed period, but outside the blanking period, the ventricle is
paced at the end of the committed period. The committed period
prevents inappropriate ventricular inhibition if crosstalk occurs.
Protection against noise: Allows the distinction between ventricular
noise and ventricular fibrillation. If the device senses ventricular
noise, the ventricular sensitivity is decreased until noise is no longer