Pacing Modes And Parameters; Pacing Modes; Refractory Periods - BIOTRONIK Reocor D Gebrauchsanweisung

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DDD Synchronous A-V pacing with sensing and pacing in the atrium as well as in the ventricle.
VDD Synchronous, ventricular pacing with atrial tracking.
D00 Asynchronous A-V pacing, no sensing in both chambers.
VVI Sensing and pacing in the ventricle
V00 Asynchronous pacing in the ventricle
VVT Like VVI, but immediate pulse delivery upon sensing of a ventricular event outside the
refractory period

Pacing Modes and Parameters

Pacing Modes

Reocor D operates in one of the following six pacing modes:
In case of disturbances caused by electromagnetic inter-
ference (EMI), Reocor D will select asynchronous pacing
when certain limits are exceeded. Depending on whether the
interference is sensed in the atrium or in the ventricle, the
following operating modes will result for the duration of
the interference:
Undisturbed operating mode
SSI, SST
VDD
DDD

Refractory Periods

The rate up to which the ventricles are paced synchronous to
atrially sensed events (upper rate) is determined by the atrial
refractory period (ARP). The temporal sequence is started by
atrially sensed and paced events, as well as by premature
ventricular contractions, which reset the timing cycle. If the
upper rate is exceeded, every second atrial pulse will fall into
the ARP, will not be sensed, and will not trigger a ventricular
pulse. The ventricular pacing rate will continue at a ratio of
2:1. (Figure16).
Interference by EMI
S00
VAT, VVI, V00
DAD, DVI, D00