B40/B20 Patient Monitor11-20Setting the ST measurement pointsAutomatic setting of the J, ST and ISO pointsThe ST algorithm automatically searches for the J and ISO points. The distance between the STand J point is set according to the heart rate:− If the heart rate is less than 120 bpm, the ST point is set at J+80 ms.− If the heart rate is more than or equal to 120 bpm, the ST point is set at J+60 ms.Setting the J, ST and ISO points manuallyYou can also set the J, ST and ISO points manually. If any of these points is manually set, theother two are set at their current values.Select Adjust ST and Set ISO point, Set J point or ST point.• Setting the J point manuallyThe J point is the point on the ECG trace where the S wave transitions to the ST segment.Adjust the J point by turning the Trim Knob and confirm by pushing the Trim Knob. If the Jpoint setting is changed, the original point is shown as a dashed line. When you adjust theJ point, also the ST point is set according to the selected ST point setting (J+20, J+40, J+60or J+80).The manually set J point remains until the monitor is turned off or reset. After a turn-off orreset, the J point is set automatically.• Setting the ST point manuallyST segment is the component of the ECG trace between the end of the QRS complex andthe T wave.Manual ST point adjustment sets the distance between ST and J points in ms. Selectionvalues are J+20, J+40, J+60, J+80.The manually set ST point remains until the monitor is turned off or reset. After a turn-offor reset, the ST point is set automatically according to the heart rate.• Setting the ISO point manuallyThe ISO point is on the isoelectric line. Adjust the ISO point by turning the Trim Knob andconfirm by pushing the Trim Knob. If the ISO point setting is changed, the original point isshown as a dashed line.The manually set ISO point remains until the monitor is turned off or reset. After a turn-offor reset, the ISO point is set automatically.
