Synonyms for sa node
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Princeton's WordNet
pacemaker, cardiac pacemaker, sinoatrial node, SA node(noun)
a specialized bit of heart tissue that controls the heartbeat
Synonyms:
artificial pacemaker, pacemaker, pacer, cardiac pacemaker, sinoatrial node, pacesetter
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"sa node." Synonyms.net. STANDS4 LLC, 2013. Web. 18 May 2013. <http://www.synonyms.net/synonym/sa node>.

