Right coronary artery
In the blood supply of the heart, the right coronary artery is an artery originating above the right cusp of the aortic valve, at the right aortic sinus in the heart. It travels down the right coronary sulcus, towards the crux of the heart. It branches into the posterior descending artery and the right marginal artery. Although rare, several anomalous courses of the right coronary artery have been described including origin from the left aortic sinus.
At the origin of the RCA is the conus artery.
In addition to supplying blood to the right ventricle, the RCA supplies 25% to 35% of the left ventricle.
In 85% of patients, the RCA gives off the posterior descending artery. In the other 15% of cases, the PDA is given off by the left circumflex artery. The PDA supplies the inferior wall, ventricular septum, and the posteromedial papillary muscle.
The RCA also supplies the SA nodal artery in 60% of people. The other 40% of the time, the SA nodal artery is supplied by the left circumflex artery.Additional images
