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Conal Branch of Right Coronary Artery
Cardiovascular System

Conal Branch of Right Coronary Artery

Ramus coni arteriosi arteriae coronariae dextrae

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The conal branch is the first branch of the right coronary artery. It may arise from the anterior aortic sinus in up to one third of individuals where it may occasionally be called the third coronary artery (Standring, 2016).


The conal branch of the right coronary artery is a small artery that courses in an anteroinferior direction over the upper portion of the right ventricle.


The conal branch of the right coronary artery has many small unnamed branches that may anastomose with the branches of the left interventricular artery. In this case, they form an anastomotic ring (annulus of Vieussens) which encircles the outflow tract of the right ventricle (Standring, 2016).

Supplied Structures

The conal branch of the right coronary artery supplies the region of the conus arteriosus.

List of Clinical Correlates

- Coronary artery disease

- Coronary atherosclerosis

- Coronary bypass graft

- Coronary angioplasty

- Coronary occlusion

- Coronary revascularization

- Coronary artery fistula


Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.

Learn more about this topic from other Elsevier products

Right Coronary Artery

ScienceDirect image

The right coronary artery (RCA) is initially imaged in the LAO 30-degree view, which displays the proximal and distal RCA well, and the artery appears as the letter C. To evaluate the right posterior descending artery (rPDA) and posterior lateral branches (rPL), RAO 0-degree, cranial 30-degree view is utilized.

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