LBL-2008-41-v5 OptoMonitor 3 IFU_en Rev 2021-08
49
|
P a g e
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 appears.
The symbol “X B” displayed on the top left-hand section on the MAIN screen indicated the
selected Average Period setting.
NOTE: This only applies to FFR recordings.
Pd Delay
CAUTIONS:
An insensitive or overly sensitive averaging of pressure may result in an incorrect FFR/dPR 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.