Unipolar Limb Leads aVR aVL aVF

Augmented Leads Avr Avl Avf

Unipolar leads record the difference between an active limb electrode and an indifferent zero potential electrode at the centre of Einthoven's triangle Figure HE.11 . These signals are of lower amplitude than other leads and require increased amplification hence referred to as augmented leads aVR the augmented unipolar right arm lead faces the heart from the right side and is usually orientated to the cavity of the heart. Therefore, all the deflections P, QRS and T are normally negative in this...