NEET PG Medical – 2012 – Question – 55

Correct Answer – A
Right coronary artery supplies
* SA node (in 65%),
* whole conducting system (AV bundle, bundle of his, part of left bundle branch) except RBB and part of left branch of AV bundle,
* posterior part of ventricular septum,
* most of right ventricle except small part adjoining anterior interventricular groove and small part of left ventricle adjoining posterior interventricular groove.
Left coronary artery supplies
* most of the left atrium,
* most of the left ventricle including apex,
* small part of right ventricle adjoining anterior interventricular septum,
* anterior 2/3 of ventricular septum,
* RBB, LBB
* SA node in 35% of cases.