Patient Monitor User Manual Monitoring ECG
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Switching the ARR Analysis from Off to On;
Changing patient type or electrode type;
Connecting or switching calculation leads;
Changing pacemaker status;
Exiting DEMO or Standby mode;
Admitting a patient;
Switching calibration mode into normal measurement mode;
Switching the ECG parameter on.
Changing-over between basic ARR and advanced ARR.
NOTE:
1
During the relearning phase of the algorithm, arrhythmia detection may not be
available. So you should closely monitor the patient condition during and for several
minutes after the learning phase to allow the algorithm to reach optimal detection
performance.
2
Take care to initiate ARR selflearning only during periods of predominantly normal
rhythm and when ECG signal is relatively noise-free. If ARR selflearning takes place
during arrhythmia, the ectopics may be incorrectly learned as normal QRS complex.
This may result in missed detection of subsequent events of arrhythmia.
3
If ARR selflearning is performed during ventricular rhythm, ventricular heartbeats
may be erroneously identified as normal QRS complexes. This may lead to missed
ventricular tachycardia and ventricular fibrillation events.
Due to this reason, you should:
1) Take care that ARR selflearning may start automatically;
2) Response to lead off information;
3) Always check the correctness of arrhythmia alarm.
9.10 QT Analysis
The QT interval is the time from the beginning of Q wave to the end of T wave. It measured the
total duration of the depolarization (QRS duration) and repolarization (ST-T) phases of
ventricular action potential. QT analysis can help detect extended QT interval syndrome.
9.10.1 Measurement Limitations
The following clinical status of the patient may affect the QT analysis, and the inaccurate
measurement may but is not limited to the following reasons:
The T-wave is very flat;
Atrial flutter and atrial fibrillation make T wave is difficult to define;
The end of the T-wave is difficult to define because of the presence of U-waves;
A high heart rate causes the P-wave to encroach on the end of the previous T-wave;
