Mintek Pacemaker LV-T ユーザーズマニュアル

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Stratos LV/LV-T Technical Manual  131 
6.4 Magnet 
Effect 
Automatic Magnet Effect: 
After magnet application the pulse generator paces at 90 ppm 
for 10 cycles asynchronously.  Thereafter, the pulse generator 
paces synchronously at the programmed basic rate.  During 
asynchronous pacing, the AV interval is reduced to 100 ms. 
Asynchronous Magnet Effect: 
When programmed to asynchronous operation, magnet 
application results in asynchronous pacing.  Stratos CRT-Ps 
pace asynchronously at 90 ppm as long as the magnet is over 
the CRT-P.  Upon magnet removal, the current basic interval is 
completed before the CRT-P 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 CRT-P.  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 
magnet application with either ‘Asynchronous’ or ‘Synchronous’ 
magnet effect. 
6.5 Position 
Indicator 
The position indicator facilitates positioning of the programmer 
head.  The programmer optically and acoustically indicates 
whether the programmer head is in communication with the 
CRT-P.