7ECG, Arrhythmia, ST and QT Monitoring ECG Lead Fallback
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ECG Leads Monitored
Changing Lead Sets
To change the ECG lead set,
• When adding leads: place the additional electrodes as required - the monitor automatically
recognizes the new lead placement.
• When removing leads: there are two possibilities - removing the complete chest leads block or
removing individual leads. If you unplug the chest lead block from the trunk cable connector, the
monitor will automatically recognize the new lead placement. Remove individual leads by removing
the electrodes. The monitor will issue a Lead Off INOP message; select New Lead Setup in
the Setup ECG menu and the INOP message will disappear.
ECG Lead Fallback
If fallback is configured on and there is a leads off INOP in the primary lead (and in the secondary
lead, if you are using multi-lead monitoring) for longer than 10 seconds, and if another lead is
available, this available lead automatically becomes the primary lead. This is known as lead fallback.
When the Leads Off condition is corrected, the leads are automatically switched back.
This setting can only be changed in Configuration Mode.
ECG Lead Placements
The labels and colors of the ECG electrodes differ according to the standards that apply for your
hospital. The electrode placement illustrations in this chapter use the AAMI labels and colors.
If you are using these leads are available: Resp is measured
between electrodes:
a 3-electrode set I, II, III RA and LL
a 5-electrode set I, II, III, aVR, aVL, aVF, V and MCL RA and LL
a 6-electrode set I, II, III, aVR, aVL, aVF, Va, Vb RA and LL
a 10-electrode set I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6 RA and LL
an EASI 5-electrode set I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6 I and A
Electrode labels Electrode colors
AAMI EASI IEC AAMI IEC
RA I R White Red
LA S LBlack Yellow
LL A FRed Green
RL N NGreen Black
V E C Brown White
V1 C1 Brown/Red White/Red
V2 C2 Brown/Yellow White/Yellow