With the advent of new percutaneous and surgical techniques used in the treatment of coronary artery disease, and supraventricular bradi-tachy-arrhythmias including atrial fibrillation, awareness of origin and routes of the atrial branches, particularly the sinoatrial nodal branches of coronary tree, have assumed great importance (10-12).
The surgical significance of the atrial branches of the coronary arteries.
Atrial branches: One to three atrial branches arose from the right side of the RCA and extended upwards and to the right on the anterior surface of the right atrium.
Atrial branches: Usually, there were two to three atrial branches which extended upwards from the second segment to the posterior surface of the right atrium.
Atrial arteries: There were one to two atrial branches which arose from its upper border.