User`s guide

Identifying ECG Problems
6-2 Troubleshooting
Identifying ECG Problems
The following table shows symptoms and solutions to problems that can
occur when recording an ECG.
All leads except III show discontinui-
ties or dashed lines
RA or R (right arm) electrode or
cable wire
Any combination of chest (V) leads
shows
discontinuities or dashed line
Indicated chest (V) electrodes or
cable wires
Table 6-1: Identification of Leads Off Connections
Symptom Check Electrode
Table 6-2: ECG Problems and Solutions
Problem Cause Possible Solutions
Power line AC Inter-
ference
Poor electrode contact. Dry or dirty
electrodes.
Lead wires may be picking up inter-
ference from poorly grounded equip-
ment near the patient.
Patient cable is too close to the car-
diograph or other power cords.
Abrade skin. Use new electrodes. Reap-
ply electrodes. Check expiration date on
disposable electrodes.
Route lead wires along limbs and away
from other electrical equipment. Fix or
move poorly grounded equipment.
Move cardiograph away from the
patient. Unplug the cardiograph and
operate on battery only. Move other
electrical equipment away from patient.
Unplug electric bed.