This site is intended for healthcare professionals

Sign in
Go to /sign-in page

You can view 5 more pages without signing in

Sinuatrial nodal artery (heart, anatomy)

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

The sinuatrial nodal artery may arise as a branch of one or both of two larger arteries:

  • the right coronary artery:
    • present in 55% of the population
    • originates proximally in the course of the right coronary artery just after it has emerged from the right coronary sinus
  • the circumflex branch of the left coronary artery:
    • present in 45% of the population
    • originates just after the circumflex artery has diverged from the left coronary artery
    • passes superiorly and to the right, posterior to the aorta and superior to the upper, left pulmonary vein

Often, the artery forms an arterial ring around the structures it supplies:

  • right atrium
  • right auricle
  • sinuatrial node

Rarely, the sinuatrial artery may arise directly from the right coronary sinus separately from the right coronary artery.

Related pages

Create an account to add page annotations

Create a free account

Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.

The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

Connect

Copyright 2024 Oxbridge Solutions Limited, a subsidiary of OmniaMed Communications Limited. All rights reserved. Any distribution or duplication of the information contained herein is strictly prohibited. Oxbridge Solutions receives funding from advertising but maintains editorial independence.