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Test Findings

Electrical Interference



  • 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.
    • Electrical Interference
    • Causes of Electrical Interference

    • Incorrect earthing
    • Other electrical equipment plugged into the same circuit
    • The patient’s muscle activity
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