The right coronary artery supplies all of the following parts of the conducting system in the heart except -

Area supplied by right coronary artery -        SA node (in 65%) -        Conducting system (AV bundle, bundle of His, part of left bundle branch) except RBB and part of left branch of AV bundle. -        Posterior 1/3rd of interventricular septum -        Right ventricle except part adjoining anterior interventricular groove and small part of left ventricle adjoining posterior interventricular groove.  Area supplied by left coronary artery -        Left atrium -        Left ventricle including apex -        Part of right ventricle adjoining anterior interventricular groove. -        Anterior 2/3rd of interventricular septum -        RBB, LBB -        SA node (in 35%)