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Chapter 5: ECG analysis and measurement
General information
In order to automatically analyze the ECG signal, the analysis and interpretation software of
the University of Glasgow (The Glasgow Program) has been added to DENA 1210. This
software helps in more accurate diagnosis of the disease in two parts: Measurement and
Interpretation. The Measurement section measures and reports the important parameters of the
ECG signal and the Interpretation section uses the results of the Measurement section to
diagnose the disease.
For best results, the physician must enter the patient's gender and age. It should be noted that
the Glasgow software analyzes and interprets 10 seconds of the ECG signal.
Reported parameters in Global mode
In Global mode, reported signal specifications, are not dependent on individual ECG leads and
are generally calculated for the ECG signal.
ECG parameters
P Duration [ms]
PR Interval [ms]
QRS Duration [ms]
RR Interval [ms]
QT Interval [ms]
QTc Interval [ms]
T Duration [ms]
ST Duration [ms]
P/QRS/T/ST Axis
[degree]
Table 5-1 Reported parameters in Global
Time interval from the beginning to the end of the P wave
Time interval from the beginning of the P wave to the beginning of the Q wave
Time interval from the beginning of the Q wave to the end of the S wave
Average time interval between two consecutive R peaks
Time interval from the beginning of the Q wave to the end of the T wave
Normalized QT based on RR Intervals
Time interval from the beginning to the end of the T wave
Time interval from the beginning to the end of the ST segment
Figure 5-1 Signal parameters in Global
Description
Heart Axis
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