Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
A: Branch (1) from right coronary artery, about 1/3 inch from its origin and passing behind aorta and pulmonary artery (indicated by dotted line); reappears at (2), where it gives off three branches (3), and anastomoses with an anomalous coronary branch (4), which arises from right anterior sinus of Valsalva of the pulmonary artery. From this anastomosis two branches ascend in front of the bifurcation of the pulmonary artery and the transverse portion of arch of aorta and join anomalous branch (5) arising from subclavaian artery near origin of vertebral.
B: The three branches (3) ascend, forming a cirsoid anastomosis between the pulmonary artery and the trachea, give off a branch (6) to right bronchus, and join anomalous branch (7) arising from aorta.
From Brooks, H. St. J. Two cases of an abnormal coronary artery of the heart arising from the pulmonary artery: With some remarks upone the effect of this anomaly in producing cirsoid dilatation of the vessels. J. Anat. Physiol. 20:26-29, 1886.
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