sinuatrial node

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sin·u·a·tri·al node

[TA]

the mass of specialized cardiac muscle fibers that normally acts as the "pacemaker" of the cardiac conduction system; it lies under the epicardium at the upper end of the sulcus terminalis.

Synonym(s): nodus sinuatrialis [TA], atrionector, Flack node, Keith and Flack node, Keith node, Koch node, sinoatrial node, sinus node

Farlex Partner Medical Dictionary © Farlex 2012

sin·u·a·tri·al node

, sinoatrial node (sin'yū-ā'trē-ăl nōd, sī'nō-) [TA]

The mass of specialized cardiac muscle fibers that normally acts as the "pacemaker" of the cardiac conduction system; it lies under the epicardium at the upper end of the sulcus terminalis.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Keith,

Sir Arthur, Scottish anatomist, 1866-1955.

Keith bundle - modified cardiac muscle fibers. Synonym(s): atrioventricular bundle

Keith and Flack node - the mass of specialized cardiac muscle fibers that normally acts as the pacemaker of the cardiac conduction system. Synonym(s): Flack node; Keith node; sinuatrial node

Keith node - Synonym(s): Keith and Flack node

Koch,

Walter, German surgeon, 1880–.

Koch node - the mass of specialized cardiac muscle fibers that normally acts as the "pacemaker" of the cardiac conduction system. Synonym(s): sinuatrial node

Koch triangle - a triangular area of the wall of the right atrium of the heart that marks the situation of the atrioventricular node.

sin·u·a·tri·al node

, sinoatrial node (sin'yū-ā'trē-ăl nōd, sī'nō-) [TA]

The mass of specialized cardiac muscle fibers that normally acts as the "pacemaker" of the cardiac conduction system; it lies under the epicardium at the upper end of the sulcus terminalis.