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Atrioventricular nodal branch
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<h2 id="structure">Structure</h2> <h3>Origin</h3> <p>The atrioventricular nodal branch sees significant variation in origin: </p> <ul><li>proximal posterolateral branch from the <a href="/facts/Right_coronary_artery/lIFsjr88">right coronary artery</a> in around 77%.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a></li> <li>distal posterolateral branch from the <a href="/facts/Right_coronary_artery/lIFsjr88">right coronary artery</a> in around 2%.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></li> <li>distal <a href="/facts/Right_coronary_artery/lIFsjr88">right coronary artery</a> in around 10%.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a></li> <li>right <a href="/facts/Posterior_interventricular_artery/yWvWx9tM">posterior interventricular artery</a> in around 7%.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a></li> <li>distal <a href="/facts/Circumflex_branch_of_left_coronary_artery/Ty5S7De4">circumflex branch of left coronary artery</a> in around 4%.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a></li></ul> <p>The right coronary artery supplies the <a href="/facts/Atrioventricular_node/rRMrQror">atrioventricular node</a> in around 90% of people.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a><a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> </p><p>In approximately 2% of people, the vascular supply to the atrioventricular node arises from both the right coronary artery and the left circumflex branch.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <h2 id="function">Function</h2> <p>The atrioventricular nodal branch supplies the <a href="/facts/Atrioventricular_node/rRMrQror">atrioventricular node</a>, allowing for <a href="/facts/Muscle_contraction/EbloCYfV">excitation</a> of the <a href="/facts/Ventricle_(heart)/FCzV1xm7">ventricles</a>.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Coronary_circulation/SJhPVTgM">Coronary circulation</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Mahadevan, Vishy (2012-01-01). "Anatomy of the heart". Surgery (Oxford). Cardiothoracic I. 30 (1): 5–8. doi:10.1016/j.mpsur.2011.10.011. ISSN 0263-9319. <a href="http://www.sciencedirect.com/science/article/pii/S0263931911002262" target="_blank">http://www.sciencedirect.com/science/article/pii/S0263931911002262</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Sow ML, Ndoye JM, Lo EA. The artery of the atrioventricular node: an anatomic study based on 38 injection-dissections. Surg Radiol Anat 1996;18:183–187 <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Kawashima, Tomokazu; Sato, Fumi (2018-10-15). "Clarifying the anatomy of the atrioventricular node artery". International Journal of Cardiology. 269: 158–164. doi:10.1016/j.ijcard.2018.07.022. ISSN 0167-5273. PMID 30001947. S2CID 51618750. <a href="http://www.sciencedirect.com/science/article/pii/S0167527318323040" target="_blank">http://www.sciencedirect.com/science/article/pii/S0167527318323040</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> </ol>