P1 Patient Monitor User’s Manual
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8.7.8. ST Setup
8.7.8.1. Setting ST Alarm
ST alarm is set as follows:
1. Select ECG parameter area, waveform area or ST parameter area to enter
【ECG】 menu.
2. Select 【ST】 submenu【Alarm】submenu.
3. Set the properties of ST alarm as required.
8.7.8.2. Showing ISO Point, J Point and ST Point Marks
The ISO point, J point and ST point position marks are not displayed by default on
the ST segment in the waveform area. To display these marks, the steps are as follows:
1. Select ECG parameter area, waveform area, ST parameter area or ST
waveform area to enter 【ECG】 menu.
2. Select 【ST】 submenu【Setting】submenu.
3. Switch on 【ST Mark】.
8.7.9. Adjusting ST Measurement Point
8.7.9.1. ST Point, ISO Point and J Point
The ST value for each beat complex is the vertical difference between the isoelectric
(ISO) point and the ST point. The ISO point provides the baseline. The ST point is at the
midpoint of the ST segment. The J point is where the QRS complex changes its slope. As
the J point is a fixed distance away from the ST point, it can be useful to help you
correctly position the ST point.
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