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132 Stratos LV/LV-T Technical Manual
6.6 Pacing When Exposed to
Interference
C
AUTION
EMI – Computerized systems are subject to (Electromagnetic
Interference (EMI) or “noise”. In the presence of such
interference, telemetry communication may be interrupted and
prevent programming of the Stratos CRT-P.
A sensed event occurring during the interference interval will
continuously reset that interval for the corresponding chamber
without resetting the basic interval. Depending upon whether the
interference (electromagnetic interference, muscle potentials,
etc.) is detected by the atrial and/or ventricular channel, atrial
and/or ventricular asynchronous pacing at the programmed
timing intervals will result for the duration of the interference.
The interference interval has a duration of 125 ms. If the
detected rate exceeds 480/min (8 Hz), then the interference
interval remains refractory during the entire basic interval.
Depending on the programmed pacing mode and the channel in
which electromagnetic interference (EMI) occurs, Table 27
details the resulting pacing modes for the duration of exposure to
EMI.