Operator's Manual

Monitoring with the TM80/TM70 at the CMS Arrhythmia Monitoring

TM80/TM70 Telemetry Monitor Operator’s Manual 12 - 21

4. Baseline ST value

5. ST unit

5-lead ST segments

12.10 Arrhythmia Monitoring

12.10.1 Entering the Arrhythmia Tab

To enter the [Arrhythmia] tab, follow this procedure:

1. Select the ECG digital area or waveform area to enter the [ECG] menu on the

ViewBed screen of the CMS.

2. Select the [Arrhythmia] tab.

12.10.2 Measurement Limitations

■ Since the arrhythmia detection algorithm sensitivity and specificity is less than

100%, sometimes there may be some false arrhythmias detected and also some

true arrhythmia events may not be detected. This is especially true when the

signal is noisy.

■ The ECG size and QRS width settings affect arrhythmia detection and heart rate

calculation sensitivity.

■ If QRS amplitude is low, the monitor might not be able to calculate HR and false

asystole may occur.

■ At the algorithm learning phase, arrhythmia detection may not be available.

Therefore, closely monitor the patient’s condition during the learning phase after

the learning phase to allow the algorithm to reach optimal detection

performance.