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.

The atrioventricular nodal branch sees significant variation in origin: 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] The atrioventricular nodal branch supplies the atrioventricular node, allowing for excitation of the ventricles.