axis deviation (right)

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This may result from hypertrophy of the right ventricle so that there is a swing of the cardiac axis to the right (axis >90 degrees).

This results from right ventricular hypertrophy. It is associated with pulmonary disorders such as cor pulmonale, where there is an increased strain on the right side of the heart. It is also associated with congenital heart defects.

ECG findings: the QRS in I becomes negative and the deflection in III and aVF will become positive.

Last reviewed 01/2018