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Diagonal Branch of Anterior Interventricular Artery
Cardiovascular System

Diagonal Branch of Anterior Interventricular Artery

Ramus diagonalis arteriae interventricularis anterioris

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The diagonal branch is a common variant which is present in 33–50% of individuals (Standring, 2016). It is the largest branch that arises from the anterior interventricular branch of the left coronary artery.


The diagonal branch descends along the anterior (or sternocostal) surface of the left ventricle, parallel to the anterior interventricular artery.

Supplied Structures

The diagonal branch contributes to the supply of the anterior surface of the left ventricle.

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


ScienceDirect image

When the artery is occluded blood is forced through the collateral vessels, drastically increasing fluid shear stress and triggering an inflammatory response which drives vessel remodeling.

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