Welch Allyn CP 100 - Adjusting the ECG Waveforms

Directions for Use Chapter 5 Performing ECG Tests 55
Adjusting the ECG Waveforms
To adjust the waveforms after printing an Auto ECG or while printing a rhythm ECG,
press an item’s number key as needed until the desired choice appears.
Item Effect
Change Leads
(available for Rhythm
ECG only)
Cycles through the lead groups three at a time.
Adjust Gain Cycles through the gain settings in mm/mV (5, 10, 20, AUTO), changing the waveform size.
(AUTO is available for Auto ECGs only, not rhythm ECGs. AUTO is usually the best setting, but
some waveforms may be easier to read on other settings.) To learn how to change the gain’s
default setting, see “Reviewing the Miscellaneous ECG Settings” on page 40.
Adjust Baseline Filter Toggles between the two baseline filter settings (on or off). This filter reduces “wandering
baseline,” an upward and downward fluctuation of the waveforms. It is preferable, if possible,
to eliminate or reduce wandering baseline by addressing the causes, as explained on page 68.
To learn how to change the filter’s default setting, see “Reviewing the Miscellaneous ECG
Settings” on page 40. Caution: You cannot perform ST segment analysis on waveforms that
were recorded with the muscle filter turned on. For details, see the caution on page 52.
Adjust Muscle Filter Toggles between the two muscle filter settings (on or off). This filter reduces muscle tremor
interference: random, irregular voltage superimposed on the waveforms. It is preferable,
if possible, to eliminate or reduce muscle tremor by addressing the causes, as explained
on page 68. To learn how to change the filter’s default setting, see “Reviewing the
Miscellaneous ECG Settings” on page 40. Caution: You cannot perform ST segment analysis on
waveforms that were recorded with the muscle filter turned on. For details, see the caution on
page 52.
Adjust Speed
(available for Rhythm
ECG only)
Cycles through the paper speed settings in mm/sec (10, 25, 50).
5 mm/mV 20 mm/mV
10 mm/mV
Wandering baseline
Muscle tremor interference
50 mm/sec
25 mm/sec 10 mm/sec