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Stratos LV/LV-T Technical Manual  121 
4. Real-Time IEGM 
Stratos CRT-Ps offer the option of real-time transmission of the 
unfiltered intracardiac electrogram (IEGM).  In the 
Stratos devices, it is possible to simultaneously transmit the 
IEGM from all three channels as well as the IEGM marker 
channel.  The IEGM simultaneously recorded in the four 
channels at a scan rate of 256 Hz.  All the markers from the 
three channels are also transmitted together with the IEGM.  The 
IEGM and markers together with the surface ECG can be 
displayed directly on the screen of the programmer, on a 
connected ECG recorded or they can be printed by the 
programmer printer. 
N
OTE
When interpreting IEGM, any limitations that result from 
applying the programmer head (which contains the magnet) 
must always be considered. 
4.1 IEGM 
Recordings 
The recording of the intracardiac information over a short 
period of time before the tachycardic phase provides 
valuable details about the arrhthmogenesis of the 
tachycardia.  An IEGM recoding can be triggered by the 
following events: 
•  High atrial rates (AF recording) 
•  Mode switching recording 
•  High ventricular rate recording 
• Patient-triggered 
recording 
Every instantaneous recording provides information from 
the recording period about: 
•  The type of triggering event 
•  Time and date of the recording 
•  Sensed and paced events in the atrium and the ventricle 
including the IEGM, markers and events during the 
refractory period an in the PMT protection window. 
•  Duration of the triggering events