Left arm/right arm lead reversal

Left arm/right arm lead reversal

 

Electrocardiographic Features

Reversal of the left and right arm electrodes produces a pattern similar to dextrocardia in the limb leads:

  • Lead I becomes inverted
  • Leads aVR and aVL switch places
  • Leads II and III switch places

However, in contrast to dextrocardia there is normal R wave progression in the precordial leads.

With the left and right arm electrodes back in their correct positions, the ECG looks like this:

Lead reversal reversed

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