User`s guide

Checking Signal Quality
PageWriter 200/300pi M1771A/1770A Cardiograph 2-5
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Checking Signal Quality
You can produce better ECGs by previewing the lead traces on the screen
before you record and print the ECG. By observing the traces and adjusting
the leads accordingly, you can make the best possible ECG recording.
The screen displays the output from the selected three leads whenever the
cardiograph is on.
The leads are displayed in five groups of three leads each. The groups are
listed below:
l To select which three leads to display on the screen, press the or
key, or the bar, to display the next lead group, or press the
or key to display the previous lead group.
l Before you connect the electrodes, each lead displays on the screen as
a dotted line, indicating that at least one of the electrodes associated
with the lead is not connected. The dotted line is known as a “leads
off” trace. Use the leads off labels (see Table 2-1) to determine which
leads are off.
l As you connect the electrodes to the patient, the lead waveforms are
displayed on the screen.
Table 2-2: Lead Groups
Group Leads Displayed
Group 1 I, II, III
Group 2 aVR, aVL, aVF
Group 3 V1, V2, V3
Group 4 V4, V5, V6
Group 5 Custom 3
6SDFH