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.