Diagonal branch of anterior interventricular artery
Ramus diagonalis arteriae interventricularis anterioris
- Latin synonym: Ramus lateralis arteriae interventricularis anterioris
- Synonym: Lateral branch of anterior interventricular artery
- Related terms: Lateral branch
Definition
The term "diagonal branch of anterior interventricular artery" refers to the first diagonal branch (D1) of left anterior descending artery (LAD)
The diagonal branches (officialy termed in TA2 as anterior ventricular branches of anterior interventricular artery) arise from the left anterior descending artery (LAD) as it travels along the anterior interventricular sulcus. These branches depart at an acute angle from the LAD and run laterally and inferiorly across the free wall of the left ventricle. There are typically one to three diagonal branches, though the number and size can vary considerably among individuals:
Origin: Arises from the LAD (anterior interventricular artery), which itself is a terminal branch of the left main coronary artery.
Course: Runs diagonally across the anterolateral wall of the left ventricle, hence its name.
Territory of supply: Provides blood supply to the anterolateral wall of the left ventricle. The first diagonal branch (D1) is typically the largest and most clinically significant.
Nomenclature: The branches are numbered sequentially (D1, D2, D3) from proximal to distal along the LAD.
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