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The EKG Waveform
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Animation of Normal Sinus Rhythm

The animation below is of a normal sinus rhythm. It shows conduction in the heart beginning at the initiation of impulses (red dots) at the SA node. The impulses are propagating through the SA node, to the AV node, through the bundle of His and bundle branches and finally to the ventricles. Note the relation of the heart's electrical activity and contraction (pumping), and the EKG below. Note that the animation had been slowed about 10 times normal heart rate to show the details.

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Last Updated: 01/03/00.
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