Variation in length and termination of the ramus circumflexus of the human left coronary artery.

The length and termination of the circumflex branch of the left coronary artery were studied in 81 hearts, after injection of the coloured substance containing a radiopaque medium. The hearts were radiographed, dissected, drawn and photographed. The short type of circumflex branch, defined as a branch that did not reach the crux cordis, was found to be much more frequent (86.4%) than the long type and terminated in the majority of the cases (76.5%) as one of the posterior branches of the left ventricle.