6 ECG, Arrhythmia, ST and QT Monitoring
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Switching Individual QTc Alarms On and Off
Each QTc alarm can be switched off individually. To switch an alarm on or off, in the Setup QT
Analysis
menu, select QTc Alarm or ΔQTc Alarm to toggle between On and Off.
Changing QTc Alarm Limits
Set the high alarm limits based on your assessment of the patient's clinical condition, unit protocols,
physician orders or medication specified limits.
1 In the Setup QT Analysis menu, select High Limit.
2 Select the appropriate setting.
3 Select ΔHighLimit.
4 Select the appropriate setting.
Switching QT Monitoring On and Off
To switch all QT monitoring on or off, in the Setup QT Analysis menu, select QT Analys. to switch
between
On and Off.
Invalid Rhythm for QTc Not enough valid R-R intervals to generate QT-HR, the averaged
HR used for QTc calculation
High QT-HR QT-HR exceeds the specified upper limit of 150 bpm (for adults) or
180 bpm (for neonates and pediatrics)
Small R Wave R-wave of the signal is too small
Small T Wave T-wave of the signal is too small
End of T not Detected End of the T-Wave cannot be accurately detected
QT out of Range QT measurement is outside the specified range of valid QT values
(200-800 msec)
QTc out of Range QTc measurement is outside the specified range of valid QTc values
(200-800 msec)
QTc Erratic QTc measurements are not stable
Additional Message Cause of Invalid QT Measurement
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