Sinoatrial nodal artery
Updates to Article Attributes
Body
was changed:
The sinoatrial (SA) nodal artery is the small artery that supplies the sinoatrial (SA) node of the heart (the pacemaker).
Gross anatomy
Origin
Right coronary artery in 60% of cases and the left coronary artery in 40% of cases.
Course
The artery turns posteriorly below the superior vena caval opening.
Variant anatomy
The SA node can arise from its own opening in the anterior aortic sinus.
A study of 516 SA nodal arteries using MDCT found 96.4% of arteries were single whilst 3.6% were double. In this study only 53.4% of SA nodal arteries originated from the right coronary artery with 43% originating from the left circumflex artery.
Other variants include
- S-shaped variant 4
-<p>The <strong>sinoatrial (SA) nodal artery</strong> is the small artery that supplies the <a href="/articles/sinoatrial-node">sinoatrial (SA) node</a> of the <a href="/articles/heart">heart</a> (the pacemaker). </p><h4>Gross anatomy</h4><h5>Origin</h5><p><a href="/articles/right-coronary-artery">Right coronary artery</a> in 60% of cases and the <a href="/articles/left-main-coronary-artery-1">left coronary artery</a> in 40% of cases.</p><h5>Course</h5><p>The artery turns posteriorly below the <a href="/articles/superior-vena-cava">superior vena caval</a> opening.</p><h4>Variant anatomy</h4><p>The SA node can arise from its own opening in the anterior aortic sinus. </p><p>A study of 516 SA nodal arteries using <a href="/articles/mdct">MDCT</a> found 96.4% of arteries were single whilst 3.6% were double. In this study only 53.4% of SA nodal arteries originated from the right coronary artery with 43% originating from the <a href="/articles/circumflex-artery">left circumflex artery</a>. </p>- +<p>The <strong>sinoatrial (SA) nodal artery</strong> is the small artery that supplies the <a href="/articles/sinoatrial-node">sinoatrial (SA) node</a> of the <a href="/articles/heart">heart</a> (the pacemaker). </p><h4>Gross anatomy</h4><h5>Origin</h5><p><a href="/articles/right-coronary-artery">Right coronary artery</a> in 60% of cases and the <a href="/articles/left-main-coronary-artery-1">left coronary artery</a> in 40% of cases.</p><h5>Course</h5><p>The artery turns posteriorly below the <a href="/articles/superior-vena-cava">superior vena caval</a> opening.</p><h4>Variant anatomy</h4><p>The SA node can arise from its own opening in the anterior aortic sinus. </p><p>A study of 516 SA nodal arteries using <a href="/articles/mdct">MDCT</a> found 96.4% of arteries were single whilst 3.6% were double. In this study only 53.4% of SA nodal arteries originated from the right coronary artery with 43% originating from the <a href="/articles/circumflex-artery">left circumflex artery</a>. </p><p>Other variants include</p><ul><li>S-shaped variant <sup>4</sup>
- +</li></ul>
References changed:
- 3. Vikse J, Henry BM, Roy J, Ramakrishnan PK, Hsieh WC, Walocha JA, Tomaszewski KA. Anatomical Variations in the Sinoatrial Nodal Artery: A Meta-Analysis and Clinical Considerations. (2016) PloS one. 11 (2): e0148331. <a href="https://doi.org/10.1371/journal.pone.0148331">doi:10.1371/journal.pone.0148331</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/26849441">Pubmed</a> <span class="ref_v4"></span>
- 4. Saremi F, Channual S, Abolhoda A, Gurudevan SV, Narula J, Milliken JC. MDCT of the S-shaped sinoatrial node artery. (2008) AJR. American journal of roentgenology. 190 (6): 1569-75. <a href="https://doi.org/10.2214/AJR.07.3127">doi:10.2214/AJR.07.3127</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/18492908">Pubmed</a> <span class="ref_v4"></span>
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