User Manual

Disclosure of Technical Performance Specification
CardioNet AECG System
24
1) Analysis of heart rate
The average heart rate is calculated on the basis of the mean R to
R interval in the last 6 seconds or 8 R to R intervals (whatever is
shorter). For the MIT-BIH ECG database, the average RMS error
for the calculated HR was 1.07%, and for the AHA ECG database,
the RMS error for the HR calculated was 2.08% (see table below).
2) Analysis of rhythm Disturbances
The CardioNet System detects the arrhythmias and other ECG
abnormalities shown in the CardioNet Event Thresholds Table.
These include the following:
- Bradycardia
- Tachycardia
- Irregular heart rate to detect possible Atrial Fibrillation /
Flutter
- Frequent PVCs
- Ventricular Tachycardia
- Ventricular Fibrillation
- Pauses
AHA ECG Database HR measurements
Record ErrSum RefSum Nmeas MeanRefHR RMSerror(%)
___________________________________________________________________
Sum 130111.6913 2167402.8283 26706
Gross 81.1579 2.7197
Average 81.4511 2.0762
Summary of results from 78 records
MIT-BIH ECG Database HR measurements
Record ErrSum RefSum Nmeas MeanRefHR RMSerror(%)
________________________________________________________________________
Sum 25694.4788 1016331.6122 13030
Gross 77.9994 1.8003
Average 78.0769 1.0691
Summary of results from 44 records