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Sinoatrial node - Wikipedia, the free encyclopedia
The sinoatrial node (also commonly spelled sinuatrial node, abbreviated SA node or SAN, also called the sinus node) is the impulse-generating (pacemaker) .
http://en.wikipedia.org/wiki/Sinoatrial_node

sinoatrial node - Medical Dictionary - The Free Dictionary
Definition of sinoatrial node in the Medical Dictionary. sinoatrial node explanation . . Similar nodes on the proximal joints are called bouchard's nodes.
http://medical-dictionary.thefreedictionary.com/sinoatrial+node


About Heart Arrhythmias
Electrical impulses that coordinate the heart's contractions originate at the sinoatrial node — also called the sinus node or SA node. The SA node is a bundle of .
http://www.biosensewebster.com/patientEducation/heart-arrhythmias.aspx


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