GE Medical Systems marquette Dash 2000, Operator'S Manual, Page: 166 / 272

8-26 Dash 2000 Patient Monitor Revision C
2005873-001
Problem:
False ventricular calls
Internal
Pacemaker
Troubleshooting
Solution:
Check ECG signal from patient: (The chest lead may exhibit polarity changes
which may occasionally cause an inaccurate call.)
1. Check/adjust lead placement.
2. Check/perform skin preparation.
3. Check/replace electrodes. (If chest lead is a problem, move the
chest lead to another chest position or leg position.)
4. Relearn ECG.
a. Select ECG parameter label.
b. Select RELEARN.
IF PROBLEM CONTINUES:
1. Select ECG parameter label.
2. Select RELEARN.
There are two general things that occur when the pace mode is activated
for internal pacemaker patients.
1. Beats that would otherwise be classified as ventricular are instead
classified as V-paced if a ventricular pacemaker event is detected.
2. Residual pacemaker energy that might otherwise appear in the
ECG is removed, and a "pacemaker enhancement spike" is
artificially placed in the ECG.
Pace detection is indicated visually in the ECG parameter box. By watching
the ECG waveform, pace detection is indicated by uniform, upright
pacemaker enhancement spikes in the ECG data (both displayed and
graphed).
The pacemaker signal is acquired from the displayed ECG lead (top trace).
Two effective approaches for improving internal pacemaker detection are:
•
Change the displayed ECG trace to a different lead.
•
Move the electrodes associated with the displayed trace.