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About the ST Measurement Points
• relative to the J-point.
In the Adjust ST Points window, the pop-up keys ISO Point, J Point and ST Point are
visible and can be adjusted.
or
• directly by selecting a numeric value for the ST point.
In the Adjust ST Points window, you can adjust the ISO and ST point.
The ST Uses setting can only be changed in Configuration Mode.
To adjust the ST measurement points,
In the Setup ST Analysis menu, select Adjust ST Points to open the Adjust ST
1
Points window. Alternatively, you can use the Adjust ST Points pop-up key in the ST
Baseline window.
2
Select a suitable ECG lead for ST measurement, with a visible J-point and a visible P wave. Use the
up and down arrow keys to scroll through the ST snippets for the other ECG leads.
Use the
3
to adjust, then use the left and right arrow keys to move the measurement point. Each point is
highlighted while active.
ST label and the ST
numeric that would
apply using the
current points
1mV calibration bar
Cursors for adjusting
ST points
Timestamp of most
recent ST point
adjustment
Highlighted ST point
ISO
pop-up key to scroll through the points and activate the point you need
Select Point
ST-I
0.0
ST Points adjusted at 04 Apr 07 11:38
ISO Point -80
The ISO-point cursor positions the isoelectric point relative to the R-wave
peak. The relation is shown beside the ISO-point in milliseconds. Position the
ISO-point in the middle of the flattest part of the baseline (between the P and
Q waves or in front of the P wave).
7 ECG, Arrhythmia, ST and QT Monitoring
Adjust ST Points
J Point 48
ST Point J+60
131

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