Definition of Sinoatrial node

1. Noun. A specialized bit of heart tissue that controls the heartbeat.

Exact synonyms: Cardiac Pacemaker, Pacemaker, Sa Node
Generic synonyms: Cardiac Muscle, Heart Muscle



Medical Definition of Sinoatrial node

1. The impulse generating (pacemaker) tissue located in the right atrium, under the epicardium at the upper end of the sulcus terminalis. The specialised cardiac muscle fibres generate cardiac impulses that normally acts as the pacemaker of the cardiac conduction system. Normal impulses start in the sinoatrial node and are transmitted to the ventricles, through the atrioventricular node and into the bundle of His. Synonym: nodus sinuatrialis, atrionector, Flack's node, Keith and Flack node, Keith's node, Koch's node, sinoatrial node, sinus node. (20 Jun 2000)

Sinoatrial Node Pictures

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Lexicographical Neighbors of Sinoatrial Node

sinnerite
sinners
sinnership
sinnet
sinneth
sinnets
sinnier
sinniest
sinning
sinny
sinoatrial
sinoatrial block
sinoatrial chamber
sinoatrial conduction time
sinoatrial nodal artery
sinoatrial node (current term)
sinoatrial recovery time
sinoauricular block
sinography
sinoite
sinological
sinologies
sinologists
sinologue
sinologues
sinology
sinomenine
sinoper
sinopers
sinopia

Literary usage of Sinoatrial node

Below you will find example usage of this term as found in modern and/or classical literature:

1. Handbook of Severe Disability: A Text for Rehabilitation Counselors, Other edited by Walter C. Stolov, Michael R. Clowers (2000)
"The rhythm is paced by die sinoatrial node. ... Parasympa- thetic fibers from the vagus cranial nerve cause the sinoatrial node to slow down and sympathetic ..."

2. Hearts and Arteries: What Scientists Are Learning About Age and the ...by Caroline McNeil by Caroline McNeil (1996)
"Pacemaker See sinoatrial node. Preload The amount of blood in the left ... sinoatrial node The heart's pacemaker. A group of specialized cells in the right ..."

3. Anatomy, Descriptive and Applied by Henry Gray (1913)
"The sinoatrial node is situated on the anterior border of the opening of the superior vena cava; from it strands of fusiform fibres run under the ..."

4. Anatomy of the Human Body by Henry Gray (1918)
"The sinoatrial node is situated on the anterior border of the opening of the superior vena cava; from its strands of fusiform fibers run under the ..."

5. The Impact of Chaos on Science and Society by Celso Grebogi, James A. Yorke (1997)
"The normal heart rhythm (the sinus rhythm) is set by the sinoatrial node in the atria, which acts as a pacemaker. There are a large number of different ..."

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