Changing the Lead View
If the QRS complex does not equal a minimum of 1 mV peak‐to‐peak, then complete the
following steps to make the waveform amplitude increase.
To change the lead view
Expression MR400 Instructions for Use Monitoring ECG 5‐17
Select the setting. Only a setting of 5x or 10x is recommended.
The setting is applied.
Take note of the scale indicator; see page 5‐22. If the selected scale
results in an ECG trace so large that the waveform peaks are
distorted or clipped, Overscale will be displayed. In this case, select
another setting to resize the waveform until the message stops.
Verify that a Quadtrode electrode or Quadtrode electrodes are
being used, and verify the expiration date, quality and packaging
for the electrode.
Ensure that the preferred Quadtrode electrode is being used; see
Ensure that the suggested placement site (or sites) is being used;
see page 5‐7.
Select the ECG VS box.
The ECG menu appears. Current settings are displayed.
Depending upon the trace being examined, select Trace A Lead or
Trace B Lead.
The respective menu appears. The current setting is highlighted.