Right coronary artery
In the coronary circulation, the right coronary artery (RCA) 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.
|Right coronary artery|
The heart seen from the front, with the right coronary artery seen at the left of the image.
|Supplies||right atrium (RA), right ventricle (RV), & 25% to 35% of left ventricle.|
|Latin||arteria coronaria dextra|
At the origin of the RCA is the conus artery.
In 85% of patients (Right Dominant), the RCA gives off the posterior descending artery (PDA). In the other 15% of cases (Left Dominant), the PDA is given off by the left circumflex artery. The PDA supplies the inferior wall, ventricular septum, and the posteromedial papillary muscle.