These ECG changes are similar to the characteristic pattern seen in dextrocardia:
- Right axis deviation
- Inversion of aVR (global positivity)
- Inversion of lead I (global negativity)
- Absent R-wave progression in the precordial leads with dominant S waves throughout
Of note, reversal of the left and right upper limb electrodes may produce a similar picture to dextrocardia in the limb leads, but with normal appearances in the precordial leads.
See this post from LITFL for an excellent review on on the topic of limb lead reversals.
