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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.
NOTE:
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