regional_part_of Circumflex branch of left coronary artery Zone of circumflex branch of left coronary artery Zone 10 of circumflex branch of left coronary artery FMA:86545 Mid inferior zone of circumflex branch of left coronary artery Zone of circumflex branch of left coronary artery which supplies the mid inferior zone of myocardium of left ventricle and is continuous with zones 4, 11 and 15 of circumflex branch of left coronary artery. fma Mid zone of circumflex branch of left coronary artery