Right coronary artery

Artery: Right coronary artery
Sternocostal surface of heart. (Right coronary artery visible at left.)
ARTERIES: RCA = right coronary AB = atrial branches SANB = sinuatrial nodal RMA = right marginal LCA = left coronary CB = circumflex branch LAD/AIB = anterior interventricular LMA = left marginal PIA/PDA = posterior descending MARG = left marginal AVN = atrioventricular nodal VEINS: SCV = small cardiac ACV = anterior cardiac AIV/GCV = great cardiac MCV = middle cardiac CS = coronary sinus
Latin	arteria coronaria dextra
Gray's	subject #142 546
Source	ascending aorta
Dorlands / Elsevier	a_61/12154058

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

The right coronary artery (or RCA) originates above the right cusp of the aortic valve. It travels down the right atrioventricular groove, towards the crux of the heart.

At the origin of the RCA is the conus artery.

In addition to supplying blood to the right ventricle (RV), the RCA supplies 25% to 35% of the left ventricle (LV).

In 85% of patients, the RCA gives off the posterior descending artery (PDA). 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 patients. The other 40% of the time, the SA nodal artery is supplied by the left circumflex artery.

Additional images

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  Base of ventricles exposed by removal of the atria.

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  The arch of the aorta, and its branches.

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  Plan of the branches.

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  Diagram of a myocardial infarction.

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  Aorta and coronary arteries at autopsy. The proximal portion of the RCA and its ostium can be seen at the lower left.

External links

• Overview at Cleveland Clinic
• 00462 at CHORUS
• Norman/Georgetown thoraxlesson4 (heartantmajorvessels)
• SUNY Figs 20:03-04 - "Anterior view of the heart."