sinuatrial (S-A) nodal branch of right coronary artery
Definition: ascending atrial branch, usually (55%) arising from the anterior stem of the right coronary artery (but 35–45% arising from the circumflex branch of the left coronary artery), which runs around the base of the superior vena cava to reach the sinuatrial node.
Synonym(s): ramus nodi sinuatrialis arteriae coronariae dextraeTA, artery to the sinuatrial (S-A) node, branch to sinuatrial node, sinuatrial nodal artery, sinuatrial nodal branch of right coronary artery, sinuatrial node artery, sinus node artery
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