BIOTRONIK Evia DR, Technical Manual

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122 Evia Technical Manual
Asynchronous Magnet Effect:
When programmed to asynchronous operation, magnet
application results in asynchronous pacing. The pulse generator
paces asynchronously at 90 ppm as long as the magnet is over
the pulse generator. Upon magnet removal, the current basic
interval is completed before the pulse generator reverts to its
original operating mode.
If the magnet effect is set to asynchronous, the AV delay is
reduced to 100 ms (or the programmed AV delay, whichever is
shorter). Shortening of the AV delay to 100 ms during
asynchronous AV sequential stimulation is provided to avoid
ventricular fusion beats in the presence of intact AV conduction.
This allows efficient diagnosis of ventricular capture or failure to
capture.
Synchronous Magnet Effect:
If the magnet effect is programmed to synchronous operation,
magnet application does not affect timing and sensing behavior
of the pulse generator. Synchronous operation is of particular
importance during follow-up, if sensing and inhibition functions
are desired during magnet application.
Trend monitor and event counter operation is interrupted during
any magnet application.
9.3 Temporary Programming
C
AUT IO N
OFF Mode – Use of the OFF mode
should be avoided in
pacemaker dependent patients. The OFF mode can be
transmitted as a temporary program only to permit evaluation
of the patient’s spontaneous rhythm.