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Sinoatrial node

sinoatrial node

(Science: anatomy, cardiology, physiology) 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.


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Please Help - The Heart

... Fill In the Blank: Atrial Systole Cardiac Output Atrioventricular Node Cardiac Sounds Autonomic Nervous System Diastole Bundles & Conductive Fibers EKG Cardiac Cycle Sinoatrial Node Ventricular Systole 1. Sinoatrial Node the heart’s “pacemaker”, a mass ...

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by PleaseHelp
Sun Feb 21, 2010 10:03 pm
 
Forum: General Discussion
Topic: Please Help - The Heart
Replies: 5
Views: 6638

Sinoatrial Node ,

Hey, thanks for the info dealing with the sinoartial node, I will try to find which nerve responisble for the controlment. But if you ... the way from the cranial to the anus nerve. You once said that the (SA )or sinoatrial node can keep the heart beating alone how. I still have not found actually ...

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by CXCR4
Thu Feb 12, 2009 6:57 pm
 
Forum: General Discussion
Topic: controling Nerve of the Brain? Which One
Replies: 8
Views: 15671

Re: controling Nerve of the Brain? Which One

It is important to note the sinoatrial (SA) node when mentioning heart rhythms as well. This provides sympathetic innervation of the myocardial muscle, ...

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by daveinhampton
Tue Feb 10, 2009 5:03 pm
 
Forum: General Discussion
Topic: controling Nerve of the Brain? Which One
Replies: 8
Views: 15671

Electric shocks, anybody??

... is induced in the refractary period) the impulse won't get from the sinoatrial node to the rest of the heart. The heart simply stops. Just a hypothesis...

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by MrMistery
Fri Feb 02, 2007 6:14 pm
 
Forum: Human Biology
Topic: Electric shocks, anybody??
Replies: 10
Views: 4809

BIOLOGICAL PACEMAKER-SA NODE

... YOUR QUESTIONS CLEARLY. AND THIS IS NOT A PLACE TO IRONY SOME ONE. The sinoatrial node (abbreviated SA node or SAN, also called the sinus node) is the impulse generating (pacemaker) ...

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by dipjyoti
Wed Sep 27, 2006 7:03 am
 
Forum: Human Biology
Topic: BIOLOGICAL PACEMAKER-SA NODE
Replies: 10
Views: 5595
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