BeneVision TM80, Operator'S Manual

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BeneVision TM80 Telemetry Monitor Operator’s Manual 13 - 7
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ST segment analysis calculates ST segment elevations and depressions for individual
leads and then displays them as numerics in the ST digital area.
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A positive value indicates ST segment elevation; a negative value indicates ST
segment depression.
WARNING
•
The ST algorithm has been tested for accuracy of the ST segment data. The
significance of the ST segment changes need to be determined by a clinician.
•
ST deviation is often calculated at a fixed offset from the J point. Changes in
heart rate may affect ST.
13.6.1 Adjusting ST Measurement Points
The ISO and ST points need to be adjusted when you start monitoring and if the patient’s
heart rate or ECG morphology changes significantly. Exceptional QRS complexes are not
considered for ST-segment analysis.
WARNING
•
Always make sure that the ST measurement points are appropriate for your
patient.
To adjust ST measurement points, 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 ST tab.
3. Select the Adjust section.
4. Set ST Point .
5. Enable or disable Auto Adjust . This option defines the method of adjusting the ISO
point and J point.
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Enabled: It is enabled by default. In this case, positions of ISO point and J point
are automatically adjusted accordingly.
◆
Disabled: you need to manually adjust the position of ISO point and J point by
selecting the arrows at the right sides of ISO and J.
13.6.2 Entering the ST Graphic Window
To enter the ST graphic window, follow this procedure.
1. On the ViewBed screen of the CMS, select the ECG digital area or waveform area to
enter the
ECG menu.