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Test Findings

Right Axis Deviation



  • Right axis deviation occurs when the direction of cardiac depolarisation lies between 90° and 180°.
    • Look For

    • Negative lead I with positive lead aVF.
    • Right Axis Deviation
  • Lead II will be positive between 90-150° and negative between 150-180°.
    • Causes of Right Axis Deviation

    • Right ventricular hypertrophy
    • Right heart strain - PE, COPD
    • Lateral myocardial infarction
    • Left posterior fascicular block
    • Dextrocardia
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