Right coronary aery supplies all, except?
Right coronary aery supplies (i) SA node (in 65%), (ii) whole conducting system (AV bundle, bundle of his, pa of left bundle branch) except RBB and pa of left branch of AV bundle, (iii) posterior pa of ventricular septum, (iv) most of right ventricle except small pa adjoining anterior interventricular groove and small pa of left ventricle adjoining posterior interventricular groove. Left coronary aery supplies (i) most of the left atrium, (ii) most of the left ventricle including apex, (iii) small pa of right ventricle odjoining anterior interventricular septum, (iv) anterior 2/3 of ventricular septum, (v) RBB, LBB (vi) SA node in 35% of cases.
Anterior 2/3 of ventricular septum
SA node
AV node
LBB