SA node


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Related to SA node: AV node

SA node

[¦es¦ā ′nōd]
(anatomy)
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Its job is to conduct electricity in a rapid and organized fashion from the SA node to the AV node and then down through the lower conduction pathways to the ventricles.
SA node is the natural pacemaker of the heart, controlling the rhythm of the heart by sending electrical impulses.
The research team point out that the way electrical signals are generated in the SA node - and hence the heart rate - are far from simple.