Pacing Modes And Parameters; Pacing Modes; Refractory Periods - BIOTRONIK CRM Reocor D Manuel Technique

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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
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Pacing Modes and Parameters

Pacing Modes and Parameters

Pacing Modes

Reocor D operates in one of the following six pacing
modes:
In case of disturbances caused by electromagnetic
interference (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 Interference by EMI
SSI, SST
VDD
DDD

Refractory Periods

The rate up to which the ventricles are paced synchro-
nous to atrially sensed events (upper rate) is deter-
mined by the atrial refractory period (ARP). The tem-
poral sequence is started by atrially sensed and paced
events, as well as by premature ventricular contrac-
tions, 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 ventric-
ular pulse. The ventricular pacing rate will continue
at a ratio of 2:1. (Figure16).
S00
VAT, VVI, V00
DAD, DVI, D00