Right coronary artery

The right coronary artery (RCA) originates from the right coronary sinus and travels in the coronary sulcus (atrioventricular groove) between the right atrium and ventricle. It gives rise to several branches, including the conal branch, the sinus node artery, and the inferior interventricular artery (posterior descending artery (PDA)). Theinferior interventricular artery, which supplies the posterior part of the interventricular septum, determines the coronary artery dominance. In approximately 80% of individuals, the right coronary artery is dominant, meaning it gives rise to the inferior interventricular artery.