10-18
10.5.3 Adjusting ST Measurement Point
The ST measurement for each beat complex is the ventical difference between two measurement
points. The isoelectric point provides the baseline for the measurement and the ST point provides
the other measurement point.
Figure 10-13 ST Measurement Point
The ST measurement points need to be adjusted when you start monitoring, and if the patient’s
heart rate or ECG morphology changes siginificantly. Artifactual ST segment depression or
elevation may occur if the ISO or the ST point is incorrectly set.
NOTE
z Abnormal QRS complex is not considered in ST analysis.
R wave
P wave
T wave
Base point ISO ST measurement point
ST measurement value
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