Nurturing Life Sciences
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#Unit 13. Methods in Biology
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In recording limb lead I, the negative terminal of the electrocardiograph is connected to the right arm and the positive terminal is connected to the left arm
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In recording limb lead II, the negative terminal of the electrocardiograph is connected to the right arm and the positive terminal is connected to the left leg.
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To record limb lead III, the negative terminal of the electrocardiograph is connected to the left arm and the positive terminal is connected to the left leg.
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Einthoven’s Law
Lead I potential Lead III potential + = Lead II potential
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Three unipolar limb leads (Augmented limb leads):
VR (right arm), VL (left arm) and VF (left foot).