Правая коронарная артерия: анатомия и особенности кровоснабжения сердца

Blood vessel supplying the human heart

In the blood supply of the heart, 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. and atrioventricular nodal branch. It contributes the right side of the heart, and parts of the interventricular septum.

The right coronary artery originates above the right aortic sinus above the aortic valve.

In approximately 80% of patients (right dominant), the RCA gives off the posterior descending artery (PDA). In the other 20%, of cases (left dominant or codominant), the PDA arises from the left circumflex artery or is supplied by both the right coronary artery and the left circumflex. 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. Although rare, several anomalous courses of the right coronary artery have been described including origin from the left aortic sinus.

The right coronary artery supplies oxygenated blood to the right atrium, the right ventricle, and the posterior third and inferior end of the interventricular septum. There is significant overlap of supply of the coronary arteries. The right coronary artery is dominant over the left coronary artery 50% of the time, equal to it 20% of the time, and less significant than it 30% of the time.