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Philips M8102A Instructions For Use Manual Page 137

Patient monitor.
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About QT/QTc Interval Monitoring
Changing the lead(s) used for QT measurements will not cause the baseline to be reset.
QT View
In the
QT View
The current waves are shown in the upper half of the window and the baseline waves in a different
color below. The Q and T points are marked with a vertical line. By selecting one of the lead labels at
the top of the window you can highlight the corresponding wave; the other waves are shown in gray.
The underlined lead labels are the leads used for the QT calculation. By selecting the numeric area you
can highlight all underlined leads.
Changing The View To A Single Wave Set
To view one set of waves in a larger scale, you can cycle through the different views,
Select Current view to see the set of current waves.
1
2
Select Baseline view to see the set of baseline waves.
3
Select Split view to return to the combined view with current and baseline waves.
Setting The QT Baseline
In order to quantify changes in the QTc value, you can set a QTc baseline. For example to assess the
effect of medication on the QT interval you can set the current value as the baseline before you begin
medication. This baseline will then be used to calculate the 'QTc value.
To set the baseline,
Select Set Baseline and set the value.
window you can verify that the QT algorithm detects correct Q and T points.
7 ECG, Arrhythmia, ST and QT Monitoring
129

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