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
anatomyThe SA node can arise from it'sits 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.
-<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><h6>Origin</h6><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><h6>Course</h6><p>The artery turns posteriorly below the <a href="/articles/superior-vena-cava">superior vena caval</a> opening.</p><h6>Variant Anatomy</h6><p>The SA node can arise from it's 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>
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