Pulse Amplitude And Pulse Width; Sensitivity; Interference Interval; Burst - BIOTRONIK Reocor S Manual Tecnico

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Pulse Amplitude and Pulse Width

The pulse amplitude can be set with the Ampl. control dial (6)
within a range from 0.1 V to 17 V. If a value less than 1 V is set,
the device will sound a warning signal for two seconds.
The pulse width is 1 ms.
Pacing should be checked regularly to ensure that pacing is
effective and that a sufficient safety margin has been set.

Sensitivity

The sensitivity can be adjusted with the Sens. control dial (7)
between 1 mV and 20 mV. It should be checked regularly to
ensure that correct sensing takes place and that a sufficient
safety margin has been set.

Interference interval

The interference interval is started both by paced and sensed
events.
The interval is reset if noise is sensed during the interval
length of 80 ms, leading to asynchronous pacing at the pro-
grammed rate for as long as the interference lasts.

Burst

The rate of the atrial Burst rate function can be selected with
the control dial (10) between 60 ppm and 1000 ppm.
This function is activated with two key buttons: First the
Select burst key button (11) must be pressed and then, within
two seconds, the Start burst key button (8). The pulse delivery
then lasts as long as the Start burst key button is pressed.
Pacing the heart with rates higher than 180 ppm over a long
time period can cause severe hemodynamic complications.
Pacing at high rates should only be performed when continu-
ous monitoring is ensured.
The mode for high-frequency pacing is used to terminate cer-
tain supraventricular tachycardias (SVT) and should only be
considered for atrial applications. The application of asyn-
chronous high-frequency stimuli can interrupt an SVT by
depolarizing portions of a reentry path. When an ectopic
atrial focus is responsible for an SVT, the application of high-
frequency stimuli in the atrium can also lead to increased
suppression of the ectopic center.