Anatomy study note · Thorax

Right coronary artery

Arises from the right aortic sinus and runs in the right atrioventricular groove round to the back of the heart.

Key points

• From the right aortic sinus; runs in the right AV groove.
• Branches: conus, right marginal, AV nodal, posterior interventricular, SA nodal.
• Supplies RA, RV, inferior LV, posterior 1/3 septum, SA (60%) + AV (80%) nodes.
• Right dominance ~67%.
• Block → inferior MI (II, III, aVF).
• Vessels: mesodermal, from angioblastic tissue.
• Coronary atherosclerosis → ischaemic heart disease.
• Artery: intima / media (smooth muscle) / adventitia.

The full note in the atlas also covers

Features · Course · Branches · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 5, PDF pp. 622–628
• Inderbir Singh’s Human Embryology, ch. 15, PDF p. 236
• BRS Cell Biology & Histology, 7th ed., ch. 11, PDF pp. 197–199, 199

More from the thorax

• Right ventricle
• Serratus posterior muscles
• Sternum
• Superior vena cava
• Sympathetic trunk
• Thymus
• Trachea
• Tricuspid valve
• Vagus nerve
• Aortic valve
• Arch of aorta
• Ascending aorta

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