46
•
Cal 1mV:
Generate the 1mV calibration signal internally. This signal is used to self-test the signal amplitude
of the monitor. It must be unselected during normal operation. The default is unselected.
•
Grid:
The display switch of the grid lines on the background of ECG waveform. The default is OFF.
•
Pacer:
Enable the cardiac pacemaker pulse detection, the default is unselected. When the “Pacer” is se-
lected, the function of pacemaker pulse detection will be effective. A mark “ ” will be overlapped on the
ECG waveform (as shown in the following figure.) if the pacemaker pulse is detected while the patient wears
a cardiac pacemaker.
Note:
pacemaker pulse inhibition function is always effective for Heart Rate calculation whether you enable or
disable the function of cardiac pacemaker pulse detection or not.
•
PARM:
to enter into HR alarm setting. See Section “Understanding the Alarm Setting”.
7.6 About Arrhythmia Detection and Template Learning
•
ARR
: ECG arrhythmia analysis
ARR switch
: the switch of ECG arrhythmia detection. The default is ON. This switch does not effect the
alarm function for 5 ARR events (ECG Brady, ECG Tachy, ECG Arrest, VE Run and SVE Run). That’s to say,
the detection and alarm for 5 ARR events is fixed to be ON, and nonadjustable.
Extra ARR Learning
: indication of ARR learning status or activating ARR learning manually.
When ARR is set to “ON”, the device will start to learn the regular ECG signal automatically for ARR detec-
tion and icon “
” will be displayed. The device will finish the learning after a certain period, and the
icon will become “
”. The detected arrhythmia waveform will be displayed on the third or the last ECG
waveform display channel; if there is only one ECG waveform display channel, then the detected arrhyth-
mia waveform will be re-displayed and frozen on this channel for 8 seconds. The arrhythmia waveform will
be re-displayed on the cascaded waveform channel if there is a single Lead of ECG signal displayed with
cascaded waveform channels.
Note:
Because Arrhythmia detection needs a template ECG waveform as reference which is a piece of
normal ECG waveform with regular rhythm and stable amplitude, it is necessary to re-activate the template
learning when the patient is changed, or the Arrhythmia detection is incorrect. For stronger Arrhythmia
detection, it is recommended to wait for a clean and stable ECG waveform before starting ARR detection
during the monitoring.
Note: when the device is restarted, the Arrhythmia detection is reset to its default status.
During Arrhythmia detection, incorrect detection might occur if the non-ECG waveforms (e.g. square or
triangle waveform) appear.
Before starting the 1mV calibration signal, please turn off the Arrhythmia detection.
During Arrhythmia detection, the template learning is very important. The device requires a group of stable
QRS complex waveforms to build up this template. If the system detects Arrhythmia incorrectly, please
re-activate the template learning and obtain the correct template.
The arrhythmia analysis program is intended to detect ventricular arrhythmias. It is not designed to detect
atrial or supraventricular arrhythmias. It may incorrectly identify the presence or absence of an arrhythmia.
Therefore, a physician must analyze the arrhythmia information with other clinical findings.
Take care to initiate template relearning only during periods of normal rhythm and when the ECG signal is
relatively noise-free. If template learning takes place during ventricular rhythm, the ectopics may be incor-
rectly 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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