P1 Patient Monitor User’s Manual
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normal cardiac beats are not included in the analysis when they are followed by
ventricular beats.
QT measurement cannot be performed when the heart rate is extremely high (adults
over 150bpm, pediatric and neonatal over 180bpm). When the heart rate changes, it can
take several minutes for the QT interval to stabilize. In order to obtain reliable QTc
calculation results, it is important to avoid areas where the heart rate changes.
8.8.2. Starting the QT/QTc Monitoring
QT/QTc monitoring function is off by default, and you need to turn it on before
performing QT/QTc monitoring. Enable QT/QTc monitoring as follows:
1. Select ECG parameter area or waveform area to enter 【ECG】 menu.
2. Select 【QT】 submenu【Setting】submenu.
3. Switch on 【QT Analysis】.
8.8.3. Displaying QT/QTc Parameter
The method for displaying QT parameters and waveforms is as follows:
1. Enter the 【Screen Layout】 page in one of the following ways:
Select 【Screen Setup】 quick keyselect 【Screen Layout】submenu.
Select 【Main Menu】 quick keyfrom 【Display】 column to select
【Screen Layout】.
2. Click on the location in the parameter area where QT parameters need to be
displayed and select 【ECG】【QT】.
NOTE: QTc value is calculated based on QT-HR, not ECG-HR calculation
leads. You can enter QT View to view QT-HR. For details, please refer to
8.8.4 Entering QT View.
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