sinoatrial node


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Related to sinoatrial node: atrioventricular node, bundle of His

sinoatrial node

[¦sī·nō′ā·trē·əl ′nōd]
(anatomy)
A bundle of Purkinje fibers located near the junction of the superior vena cava with the right atrium which acts as a pacemaker for cardiac excitation. Abbreviated SA node. Also known as sinoauricular node.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Hua et al., "The natriuretic peptides BNP and CNP increase heart rate and electrical conduction by stimulating ionic currents in the sinoatrial node and atrial myocardium following activation of guanylyl cyclase-linked natriuretic peptide receptors," Journal of Molecular and Cellular Cardiology, vol.
Wilders, "Hyperpolarization-activated current, If, in mathematical models of rabbit sinoatrial node pacemaker cells," BioMed Research International, vol.
In our knowledge, it is the first report about the effect of gag reflex on sympatovagal balance of sinoatrial node; however the limitations of this study must be considered before any generalization.
The co-ordinated rhythmic contraction of the heart begins with spontaneous depolarisation of cells in the sinoatrial node due to diastolic depolarisation and calcium cycling(7,8).
In AF, the atria of the heart are stimulated by abnormal electrical impulses from the sinoatrial node and malfunctioning atrial tissue, resulting in an irregular and disorganized heart beat.
Origin of the sinoatrial node and atrioventricular node arteries in right, mixed, and left inferior emphasis systems.
What in the human heart is the purpose of the sinoatrial node?
This cardiac cycle is regulated by nerve impulses, generated by the heart's internal pacemaker called the sinoatrial node (SA node), a small bundle of specialized cells located in the right atrium.
In a normally working heart this impulse is generated by the sinoatrial node (SA node) which is located in the right atrium.