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Patient Monitor User Manual
The patient is continually performing ventricular paced.
The dominant template cannot be obtained for a long time.
The patient has left bundle branch block.
When any of above situations happens, ST monitoring should be switched off.
4
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.
5
If you use ST analysis, you must adjust the ST measurement point when you start
the monitor. If the patient's heart rate or ECG waveform changes significantly, this
will affect the size of the QT interval, so the ST point must be placed. If the
equipotential or ST points are not set correctly, the ST fragments of the artifacts may
be depressed or raised. Always ensure that the ST measurement point is suitable for
your patient.
6
ST values may be affected by such factors as some drugs or metabolic and
conduction disturbances.
7
ST is calculated with a fixed delay from the R position. Changes in heart rate or the
width of QRS may affect ST.
8
If the algorithm triggers self-learning (either manually or automatically), the
calculation of ST segment will be reinitialized.
9.8.1 Setting ST Analysis
To change ST analysis, please select ECG Setup > ST Analysis, then select On or Off from the
pop-up list.
9.8.2 ST Display
Your monitor screen may be configured to look slightly different from the illustrations.
9.8.3 About ST Measurement Points
The ST value for each beat complex is the vertical difference between the ISO point and the ST
point, as shown in the diagram below. The isoelectric (ISO) point provides the baseline, and the
ST point is at the midpoint of the ST segment. The J point is where the QRS complex changes its
slope; as it is a fixed distance away from the ST point, it can be useful to help you position the ST
point correctly.
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Monitoring ECG
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