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Stratos LV/LV-T Technical Manual 9
AV Hysteresis – If the AV hysteresis is enabled along with the
algorithm for recognizing and terminating PMTs (PMT
management), the AV delay for recognizing and terminating a
PMT has a higher priority than the AV hysteresis.
Sensing – The Stratos CRT-Ps do not sense in the left ventricle.
AV Conduction – In patients with intact AV conduction, the
intrinsic atrial tachycardia is conducted to the ventricle 1:1. With
the resynchronization mode activated, spontaneous rate of the
right ventricle mode is synchronized for a rate up to 200 ppm in
the left ventricle. For this reason, biventricular pacing mode
should be turned OFF in such cases.
Unipolar/Bipolar – If the pacing or sensing function is to be
programmed to bipolar in the atrial channel, it must be verified
that bipolar leads have been implanted in that chamber. If the
atrial lead is unipolar, unipolar sensing and pacing functions
must be programmed in that chamber. Failure to program the
appropriate lead configuration could result in patient
experiencing entrance and/or exit block.
In addition, if the atrial lead polarity setting within the Patient
Data Memory has been set to bipolar, the polarity of the
corresponding implanted lead must be confirmed to be bipolar.
Safe Program – Activating the “Safe Program” is a way of
quickly programming the device to multiple settings in the event
of an emergency. These settings include unipolar pacing with
pacing output OFF in the left ventricular channel. Refer to
Section 6.3 for further details.
Programmers – Use only BIOTRONIK’s ICS 3000 programmer
equipped with appropriate software to program Stratos CRT-Ps.
Do not use programmers from other manufacturers.
Pulse Amplitude – Programming of pulse amplitudes, higher
than 4.8 V, in combination with long pulse widths and/or high
pacing rates can lead to premature activation of the replacement
indicator. If a pulse amplitude of 7.2 V or higher is programmed
and high pacing rates are reached, output amplitudes may differ
from programmed values.