Atrioventricular nodal branch
Blood vessel From Wikipedia, the free encyclopedia
The atrioventricular nodal branch is a coronary artery that supplies arterial blood to the atrioventricular node, which is responsible for initiating muscular contraction of the ventricles. The AV nodal branch is most often a branch of the right coronary artery.
| Atrioventricular nodal branch | |
|---|---|
Sternocostal surface of heart. | |
 ARTERIES: RCA = right coronary AB = atrial branches SANB = sinuatrial nodal RMA = right marginal LCA = left coronary CB = circumflex branch LAD/AIB = anterior interventricular LMA = left marginal PIA/PDA = posterior descending AVN = atrioventricular nodal VEINS: SCV = small cardiac ACV = anterior cardiac AIV/GCV = great cardiac MCV = middle cardiac CS = coronary sinus | |
| Details | |
| Identifiers | |
| Latin | ramus nodi atrioventricularis |
| TA98 | A12.2.03.110 |
| TA2 | 4140 |
| FMA | 3851 |
| Anatomical terminology | |
Structure
Origin
The atrioventricular nodal branch sees significant variation in origin:
- proximal posterolateral branch from the right coronary artery in around 77%.[1]
- distal posterolateral branch from the right coronary artery in around 2%.[1]
- distal right coronary artery in around 10%.[1]
- right posterior interventricular artery in around 7%.[1]
- distal circumflex branch of left coronary artery in around 4%.[1]
The right coronary artery supplies the atrioventricular node in around 90% of people.[1][2]
In approximately 2% of people, the vascular supply to the atrioventricular node arises from both the right coronary artery and the left circumflex branch.[3]
Function
The atrioventricular nodal branch supplies the atrioventricular node, allowing for excitation of the ventricles.[1]
See also
References
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