8-16 Passport 12/Passport 8 Operator’s Manual
1: QTc alarm limit (if QTc alarm is off, the alarm off symbol is displayed)
2: Parameter label
3: QTc value
4: ΔQTc value (the difference between the current and reference QTc values. If ΔQTc alarm is off, the alarm off symbol
is displayed on the right.)
5: QT value
NOTE
QTc values are calculated based on the QT-HR, not the ECG HR. To view the QT-HR, open the QT View
window.
8.7.4 Accessing the QT View
QT View shows the current and reference QT parameter values and waveforms.
To accss the QT View:
1. Select the QT parameter area or waveform area to enter the [QT Analysis] menu.
2. Select [QT View>>].
The following picture shows the QT view.
The current waveform is shown in the upper half in green.
The reference waveform is shown below in yellow.
The start of QRS complex and the end of the T wave are marked with vertical lines.
In some conditions, no QT measurement can be calculated. Then the cause of failed QT measurement is shown at
the bottom of the QT numerics area. Additionally the message “Cannot Analyze QT” is shown in the technical alarm
area.
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