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ST measured value of each HB composite waveform is the vertical distance between this waveform and
the crossing of two measuring points.
Caution
Where obvious changes happen to the patient‟s HR or ECG Waveform, it is necessary to adjust
the ST measuring point in the following methods.
Method of Adjusting ISO and ST
Adjust the values by turning the knob.
Setting the measuring point of ST Segment, please open the ―Determine Analysis Point‖ window and the
window will show QRS wave-group module (if the channel is not opened, ―ST Analysis Switch OFF‖ will
be prompted). The location for high-brightness line in the window can be adjusted. Select the ISO or ST
first, and then turn the knob both leftward and rightward to move such a line in parallel so as to determine
the reference point or measuring point.
Caution
The abnormal QRS wave group will not be taken into consideration when ST segment is
analyzed.
Alarms & Reminders used in ST Segment Analysis.
Caution
The alarm limits for two measured values of ST SEGMENT are coincident. The alarm limit of
each channel can‟t be set alone.
The alarm record switch in the related menu being opened, the physical alarm caused by the parameter
alarm super-limit will make the recorder automatically output the alarm parameter values and related
measured waveforms.
For the physical alarm, technical alarm and noticed information possible to happen in the ST Segment
Measurement, please see the following table.
Physical alarms:
Prompt
Messages
Causes
Alarm Levels
ST1
too
high
The measured value for ST Segment of Channel 1 is higher than the
set alarm upper limit.
Selectable
by
users
ST1 too low The measured value for ST Segment of Channel 1 is lower than the
set alarm lower limit.
Selectable
by
users
ST2
too
high
The measured value for ST Segment of Channel 2 is higher than the
set alarm upper limit.
Selectable
by
users
ST2 too low The measured value for ST Segment of Channel 2 is lower than the
set alarm lower limit.
Selectable
by
users
Technical alarms
