BeneVision TM80, Руководство оператора

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13 - 4 BeneVision TM80 Telemetry Monitor Operator’s Manual
A normal ECG waveform (for QT monitoring)
The QT interval in an ECG lead is the time interval from the onset of the earliest deflection
in the QRS complex to the end of the T wave. QT monitoring can assist in the detection of
prolonged QT interval syndrome.
13.5.1 Changing the QTc Formula
The CMS uses the Hodges correction formula by default to correct the QT interval for heart
rate. The QTc formula can be changed in the
System Setup menu. For how to change the
QTc formula, refer to BeneVision Central Monitoring System Operator’s Manual .
13.5.2 QT View
In the QT View menu, you can view a snapshot of the real-time wave and to verify that the
QT algorithm detects correct Q and T points.
13.5.2.1Entering the QT View
To enter the QT View menu., follow this procedure:
1. On the ViewBed screen of the CMS, select the ECG digital area or waveform area to
enter the
ECG menu.
2. Select the QT tab.
3. Select QT View at the bottom of the QT menu.
The QT View menu displays, as shown in the following figure:
■
The current waveform and parameter values display in green.
■
The template waveform and parameter values display in white.
■
The Q and T points are marked with a vertical line.
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int
J P
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int
ISO P
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T
QT Interval
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