Right border of heart

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Right border of heart
Sternocostal surface of heart. (Right margin visible but not labeled.)
Latin margo dexter cordis
Gray's subject #138 528
Dorlands/Elsevier m_04/12514410

The right margin of the heart (right border of heart) is long, and is formed by the right atrium above and the right ventricle below.

  • The atrial portion is rounded and almost vertical; it is situated behind the third, fourth, and fifth right costal cartilages about 1.25 cm. from the margin of the sternum.
  • The ventricular portion, thin and sharp, is named the acute margin; it is nearly horizontal, and extends from the sternal end of the sixth right coastal cartilage to the apex of the heart.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

Cardiovascular system - Heart - edit
atria (interatrial septum, musculi pectinati) | ventricles (interventricular septum, trabeculae carneae, chordae tendinaepapillary muscle) | valves

base | apex | grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) | surfaces (sternocostal, diaphragmatic) | borders (right, left)

right heart(vena cavaecoronary sinus) → right atrium (auricle, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of the inferior vena cava, valve of the coronary sinus) → tricuspid valve → right ventricle (conus arteriosus, moderator band/septomarginal trabecula)  → pulmonic valve  → (pulmonary artery and pulmonary circulation)

left heart: (pulmonary veins)left atrium (auricle) → mitral valveleft ventricleaortic valve (aortic sinus) → (aorta and systemic circulation)

pericardium  (sinus) | epicardium | endocardium | myocardium | cardiac skeleton (fibrous trigone, fibrous rings)

conduction systemcardiac pacemaker | Purkinje fibers | bundle of His | SA node | AV node