Diagnostic criteria

  P, QRS and T waves are negative in lead I and positive in lead aVR.

  Reversal of the arm leads does not affect R wave progression in chest leads.

      This feature distinguishes arm leads reversal from dextrocardia in which there is no R wave progression.




ECG 1a. Reversal of the right and left arm leads. P, QRS and T waves are negative in lead D1 and positive in lead aVR.

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ECG 1b. ECG of the same patient after correct placement of the arm electrodes.

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