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: