Difference between revisions of "Aortic sinus"

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Aortic sinus
File:Gray497.png
Aorta laid open to show the semilunar valves. (Aortic sinus labeled at upper left.)
Latin	sinus aortae
Gray's	subject #138 535

An aortic sinus is one of the anatomic dilations of the ascending aorta, which occurs just above the aortic valve.

There are generally three aortic sinuses, the left, the right and the posterior.

The left aortic sinus gives rise to the left coronary artery.
The right aortic sinus gives rise to the right coronary artery.
Usually, no vessels arise from the posterior aortic sinus, which is therefore known as the non-coronary sinus.

Each aortic sinus can also be referred to as the sinus of Valsalva, the sinus of Morgagni, or Petit's sinus.

General

Surface	base · apex · grooves (coronary/atrioventricular, interatrial, anterior interventricula, posterior interventricular) · surfaces (sternocostal, diaphragmatic) · borders (right, left) · Openings of smallest cardiac veins
Internal	atria (interatrial septum, musculi pectinati, sulcus terminalis) · ventricles (interventricular septum, trabeculae carneae, chordae tendineae, papillary muscle) · valves · cusps · Atrioventricular septum cardiac skeleton Intervenous tubercle

Chambers

Right heart	(venae cavae, coronary sinus) → right atrium (atrial appendage, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of inferior vena cava, valve of coronary sinus) → tricuspid valve → right ventricle (conus arteriosus, moderator band/septomarginal trabecula) → pulmonary valve → (pulmonary artery and pulmonary circulation)
Left heart	(pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)

Layers

Endocardium	Heart valves
Myocardium	Conduction system: Cardiac pacemaker · SA node · AV node · bundle of His · Purkinje fibers
Pericardial cavity	Pericardial sinus
Pericardium	fibrous pericardium (Sternopericardiac ligaments) · serous pericardium (epicardium/visceral layer) · Fold of the left vena cava

Revision as of 06:32, 16 September 2009 (view source) Cmcnicoll (Talk) m (updated internal links)	Latest revision as of 20:27, 21 September 2010 (view source) Jontas (Talk \| contribs) m (1 revision)
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