Electrophysiology
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Electrophysiology What Is It?

In the normal heart, the contraction of the heart's tissues, which pump blood to the lungs and body, is timed by the movement of electrical impulses. These proceed from the brain to the Sinoatrial Node, through the atria to the Atriocentricular Node, and then through the muscles of the ventricles by means of the Purkinje Fibers.