sinuatrialadj.
/sʌɪnjuːˈeɪtrɪəl/ Anatomy.
= sino-atrial adj.
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the world > life > the body > vascular system > heart > [adjective] > atrium
atrial1859
atrioventricular1879
S.A.1908
interatrial1911
sino-atrial1913
sinuatrial1935
ventriculoatrial1959
1935 Gray's Anat. (ed.26) 67 The sinu-atrial and atrioventricular nodes, the atrioventricular bundle and its right fasciculus, are supplied by the right coronary artery.
1962 Gray's Anat. (ed. 33) 747 The sinuatrial node is a narrow, horse-shoe shaped structure situated in the upper part of the sulcus terminalis of the right atrium.
1968 R. Passmore & J. S. Robson Compan. Med. Stud. I. xxviii. 9/2 The part of the heart with the highest spontaneous rate..provides the source of excitation of the whole heart, and this pacemaker is normally the sinuatrial (SA) node.
This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).
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adj.1935- slow roll
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