constitutional_part_of regional_part_of Conducting system of left ventricle Subdivision of conducting system of heart Myocardium of basal zone of left ventricle Myocardium of mid zone of left ventricle Myocardium of apical zone of left ventricle Myocardial zone 17 Myocardial zone 1 Myocardial zone 6 Myocardial zone 7 Myocardial zone 12 Myocardial zone 13 Myocardial zone 16 Myocardial zone 18 Myocardial zone 19 Myocardial zone 13a Conducting system of heart Left branch of atrioventricular bundle Anterior division of left branch of atrioventricular bundle Anterior sheet of left branch of atrioventricular bundle FMA:9488 Left anterior division of left branch of atrioventricular bundle Subdivision of conducting system of heart which enters the anterior papillary muscle of left ventricle and is continuous with the subendocardial branch of the anterior division of left branch of atrioventricular bundle. fma