ECG Monitoring
8-20
2) Select [Setup] tab and then [HRV] button at the bottom of the menu to enter [HRV] menu.
3) Set [HRV Time ].
8.7 ST Segment Analysis
ST segment of an ECG wave is an interval between the end of ventricular depolarization and the beginning of
ventricular repolarization, or a section between the end of the QRS complex (the J point) to the beginning of the T
wave. ST segment analysis is primarily used to monitor the patient's oxygen supply and myocardial viability.
ST segment monitoring is intended for use with adult, pediatric and neonatal patients.
8.7.1 Safety Information about ST
Factors such as anti-arrhythmia drugs, metabolism and conduction disturbance may affect ST values.
Since ST is calculated based on the fixed delay after the J point, it may be affected by HR changes.
The ST algorithm had been tested for ST level change for adult patient. The clinical significance should
be determined by the doctor.
8.7.2 ST Analysis On/Off
1) Select the ECG parameter area or waveform area to enter [ECG] menu.
2) Select [ST] tab → [Setup] tab.
3) Set [ST Analysis] to [On] or [Off].
Some clinical situations may encounter difficulty in achieving reliable ST monitoring. For example:
A good quality (low noise) ECG cable cannot be obtained .
Presence of arrhythmia (e.g., atrial fibrillation/atrial flutter) that can cause an irregular baseline.
The patient is under continuous ventricular pacing.
The patient has left bundle branch block.
Under such circumstances, you should consider turning off ST monitoring.
This monitor provides information about changes in ST level, the clinical significance of which should be
determined by the doctor.
8.7.3 Set ST Alarm
1) Select the ECG parameter area, waveform area or ST parameter area to enter [ECG] menu.
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