8-19
Mortara algorithm
Arrh. event Range Default configurations Interval Unit
Asys. Delay 2 to 10 NICU: 3
Other departments: 5
1 s
Vtac Rate 100 to 200 NICU: 150
Other departments: 130
5 bpm
Vtac PVC 3 to12 6 1 beats
Multif. PVC’s
Window
3 to 31 15 1 beats
Tachy High Adult: 100 to 300
Pediatric: 160 to 300
Neonate: 180 to 350
Adult: 100
Pediatric: 160
Neonate: 180
5 bpm
Brady Low Adult: 15 to 60
Pediatric: 15 to 80
Neonate: 15 to 90
Adult: 60
Pediatric: 80
Neonate: 90
5 bpm
8.7.5 Initiating Arrhythmia Relearning Manually
During ECG monitoring, you may need to initiate an arrhythmia relearning when the
patient’s ECG template changes dramatically. A change in the ECG template could result in:
incorrect arrhythmia alarms
loss of ST measurement, and/or
inaccurate heart rate
Arrhythmia relearning allows the monitor to learn the new ECG template so as to correct
arrhythmia alarms and HR value, and restore ST measurements. To initiate a relearning
manually, select the ECG parameter window→[Arrh. Analysis >>]→[Relearn Arrh.].
When the patient monitor is learning, the message [Arrh. Learning] is displayed in the
technical alarm area.
CAUTION
z Take care to initiate arrhythmia relearning only during periods of predominantly
normal rhythm and when the ECG signal is relatively noise-free. If arrhythmia
learning takes place during ventricular rhythm, the ectopics may be incorrectly
learned as the normal QRS complex. This may result in missed detection of
subsequent events of V-Tach and V-Fib.
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