EKGLab Background 1 - EKGLab Dr Gordon MacGregor Conduction...

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EKGLab Dr. Gordon MacGregor
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Conduction System of the Heart 100 per min* 40-60 per min 30-40 per min * constantly modified by the activity of sympathetic and parasympathetic nerve fibers, so that the average resting cardiac rate in adult humans is about 70 bpm
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Limb leads In both the 5- and 12-lead configuration, leads I, II and III are called limb leads. The electrodes that form these signals are located on the limbs one on each arm and one on the left leg.
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