branch_of regional_part_of Circumflex branch of left coronary artery Branch of left coronary artery which runs perpendicular to the anterior interventricular branch of the left coronary artery on the left side of the interventricular sulcus and supplies the left side of the heart. Circumflex coronary artery FMA:3895 Left circumflex branch of left coronary artery fma Left coronary artery Branch of left coronary artery