The circumflex branch was located on the coronary groove, originating two to five atrial branches (3.
The right coronary artery appeared on the right sinus of the aortic bulb, followed the coronary groove yielding from two to six atrial branches (3.
When atrial branches were considered, the left coronary artery yielded 3.
There was a positive linear correlation between the number of atrial branches from the circumflex branch and the ventricular branches originating in the paraconal interventricular branch (r = 0.
The number of atrial branches originating from the circumflex branch was described ranging from one to six (average of 4.
Coronary artery disease affecting the atrial branches
is an independent determinant of atrial fibrillation after myocardial infarction.
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.
One to two atrial branches arose from its upper border and passed upwards on the posterior surface of the left atrium.