QRS complex

[ramichow]

Why does the size and other features of the QRS complex vary according to the orientation of the electrodes?

one is positive(active) electrode in left leg , negative(reference) electrode in the left arm and the earthing in the Right arm.
second one is with positive(active) electrode in right arm, negative(reference) electrode in the left arm and the earthing in the left leg
the third one is with positive(active) electrode in right arm, negative(reference) electrode in the left leg and the earthing in the left arm.