Electrical Interference
April 24th, 2019
Overview
This type of interference originates from the power cable, ECG machine, leads or the patient; it makes interpretation of low amplitude waves (e.g. the P wave) difficult or impossible.
Look For
- High-frequency variation of the isolelectric line.
Causes of Electrical Interference
- Incorrect earthing
- Other electrical equipment plugged into the same circuit
- The patient's muscle activity
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