Asymptomatic adult patient. Routine ECG. Describe the ECG.
Describe and interpret this ECG
ECG ANSWER and INTERPRETATION
This ECG demonstrates the typical features of dextrocardia:
- Marked right axis deviation (+180 degrees).
- Lead aVR: Positive QRS complex (upright P and T waves).
- Lead I: inversion of all complexes, aka ‘global negativity’ (inverted P-QRS-T).
- Absent R-wave progression in the chest leads (dominant S waves throughout).
Accidental reversal of the left and right arm electrodes may produce a similar picture to dextrocardia in the limb leads, but with normal appearances in the precordial leads.