LBL-2019-41-v4 OptoMonitor 3 IFU wTAVI_en Rev 2022-03
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5.11
Averaging period
1-
Press the averaging period button to access the averaging period adjustments
2-
Select the number of heart beats over which to average aortic and distal pressures, between 1,
2, 3, 4, or 5 beats when the dropdown menu appear
3-
By editing this setting, the symbol “X B” displayed on the top of the MAIN screen will change
and on the VIEW screen (see section on
MAIN SCREEN
and on
VIEW SCREEN
).
The symbol “XB” displayed on the top of the MAIN screen indicates the selected Average Period
setting.
NOTE: This does not apply to dPR and dPR pullback recordings.
CAUTIONS:
An insensitive or overly sensitive averaging of pressure may result in an incorrect
FFR/dPR/Gradients/ARi/TIARi value.
•
Choosing a high number of heartbeats will make the pressure averaging slower and less sensitive
to artefacts but may also result in overly insensitive averaging which is noticeable when there is a
short hyperaemic plateau.
•
Choosing a low number of heartbeats makes the pressure averaging faster and more sensitive to
pressure changes, desirable using a short hyperaemic plateau, but it may also result in an
averaging overly sensitive to arrhythmia and pressure disturbances.