Measurements; Heart Rate (Hr); Intervals - Schiller AT-1 Mode D'emploi

Measurements

Measurements
Measurements Measurements Measurements
Note: This section gives the measurements that are calculated by the ECG unit software.

Heart Rate (HR)

HR HR
Average heart rate (HR HR) calculated on the basis of the entire 10 second recording and shown as the number of HR
beats per minute.

Intervals

Parameter Parameter Parameter Parameter Parameter
RR
P
PQ
QRS
QT
QTC
42
Description Description Description Description Description
Average time interval between two consecutive QRS complexes.
Duration of the P wave (of averaged ECG complexes)
P-Q interval: the period of time between the beginning of the P wave and the
beginning of the QRS complex (of averaged ECG complexes)
The duration of the QRS complex from the beginning of the Q wave to the end of
the S wave (of averaged ECG complexes)
Interval between the beginning of the QRS (beginning of ventricular depolarisation)
and the end of the T wave (end of repolarisation phase) (of averaged ECG
complexes)
Normalised QT interval. As the QT interval is dependent on the heart rate, it is
often converted to the normalised QTC interval i.e. the QT the patient would
show at a heart rate of 60 / min. Usually, the QTC amounts to 390 + 40 ms.
The conversion is according to Bazetts` formula :
1000
QTC = QT x
RR