The right coronary artery supplies the inferior myocardial segments as well as the right ventricle. In a majority of cases, the right coronary artery also supplies the SA node and the AV node.

In order to cause SA node dysfunction, the occlusion in the RCA must be very proximal, as the SA nodal artery is one of the first branches of the RCA. The AV nodal artery, however, is more distal ...