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23
Figure 16: Reaction of the upper tracking rate during atrial tachycardia
(basic rate 72 ppm).
WARNING!
The total atrial refractory period (TARP) of Reocor D is calcu-
lated by the sum of 175 ms and the programmed AV delay;
however, its minimum value is 400 ms below a pacing rate of
120 ppm. Above this rate, the minimum TARP is reduced to
240 ms.
The ventricular refractory period VRP of Reocor D depends
on the pacing rate:
Pacing rate
Under 150 ppm
150 ppm to 200 ppm
Over 200 ppm
Rate
The rate can be continuously adjusted from 30 ppm to
250 ppm with the Rate control dial (18). If a value greater than
180 ppm is set, the device will sound a warning signal for
two seconds.
Pacing the heart with rates higher than 180 ppm over a long
time period can cause severe hemodynamic complications.
Pacing with high rates should only be performed when con-
tinuous monitoring is ensured.
Refractory period VRP
225 ms
200 ms
175 ms
