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Test Findings
 
 

Electrical Interference

 
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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.
  • 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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