Atrioventricular nodal branch
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Through Coronary arteries and Muscle contraction
Structure
Origin
The atrioventricular nodal branch sees significant variation in origin:
- proximal posterolateral branch from the right coronary artery in around 77%.
- distal posterolateral branch from the right coronary artery in around 2%.
- distal right coronary artery in around 10%.
- right posterior interventricular artery in around 7%.
- distal circumflex branch of left coronary artery in around 4%.
The right coronary artery supplies the atrioventricular node in around 90% of people.
In approximately 2% of people, the vascular supply to the atrioventricular node arises from both the right coronary artery and the left circumflex branch.
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Function
The atrioventricular nodal branch supplies the atrioventricular node, allowing for excitation of the ventricles.
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