Introduction
This article describes how to activate the optional setting of the ECG quality display and how the system display the current ECG quality.
General
In rehab, the ECG signal is evaluated for its quality. The program analyses the signal quality separately for each ECG channel (see calculation of the ECG signal quality) and assigns one of the following signal qualities every second:
| ECG signal quality | Example ECG signal | Score value in Information block | Description |
|---|---|---|---|
| good ECG quality |
| E:1 | ECG must look like this, with such an ECG signal there are guaranteed no problems with the QRS detection |
| sufficient ECG quality |
| E:3 | This ECG quality means that the QRS detection will still recognize every QRS complex due to internal filtering, but it is already an indication that one or the other QRS complex may be overlooked here. |
| insufficient ECG quality |
| E:6 | This ECG quality means that the QRS detection is certainly "overlooked" despite the internal filtering of some QRS complexes (false negative) or disturbances of the ECG signal even as QRS detection (false positive). |
| non-physiological ECG quality |
| E: !! | With such an ECG Signal no QRS complex can be detected. This occurs, for example, when the electrodes of the ECG conduction are open. |
The ECG signal quality information is used for the following actions/displays
- automatic switching off of the ECG display on the overview page
- QRS detection
- optical alarm in case of very poor ECG signal quality
- numeric output in the info block
- as score value
- as a numerical value (which is of a technical nature)
Setting for the ECG quality display
Settings cann be activated in Option 4.13 Settings → Reha → General → Menu/Functions → Additiona settings for exercise stations → Display options un the exercise.
Description Alert Type bad ECG Signal Quality
During the Rehab Training the ECG signal quality is continuously determined. If the ECG Signal Quality is disrupted, noisy or non-physiological the Software can display a visual Alarm. The Alarm is deactivated by default and can enabled by change the Setting "CSC->cardio concept\training place\EcgQualityAlarmEnabled". If the alarm is activated, a transparent red bar will be displayed in the online ECG on the overview page on the right. It automatically disappears when the ECG Signal Quality has improved.