EDAN iM80 User Manual - page 73
Patient Monitor User Manual Monitoring ECG
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8.10 ST Segment Monitoring
The monitor performs ST segment analysis on normal and atrially paced beats and calculates ST
segment elevations and depressions. This information can be displayed in the form of ST
numerics and snippets on the monitor.
ST segment monitoring function is shut off by default. You can switch it to On when necessary.
When using the ST analysis function, the ST analysis results will be displayed on the right of the
main screen, please refer to the following figure.
NOTE:
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.
8.10.1 Setting ST Analysis
To change ST analysis, please select ECG Setup > ST Analysis, then select On or Off from the
pop-up list.
8.10.2 ST Display
Your monitor screen may be configured to look slightly different from the illustrations.
ST
I
II
III
0.08
0.10
0.02
aVR
aVL
aVF
-0.09
0.03
0.06
V
0.04
NOTE:
1
ST Analysis only can be used only in Adu mode.
2
When setting ST Analysis to on, the monitor should be in Diagnos mode.
3
ECG monitoring should be in Diagnos mode.
8.10.3 ST Analysis Alarm Setting
The user can select ECG Setup > ST Analysis > Alarm Setup to set the upper alarm limit and
lower alarm limit. ALM HI can be set to 0.2 mV ~ 2.0 mV, and ALM LO can be set to –2.0 mV
~ 0.2 mV. ALM HI should be higher than ALM LO.
8.10.4 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.