Articles
Articles are a collaborative effort to provide a single canonical page on all topics relevant to the practice of radiology. As such, articles are written and continuously improved upon by countless contributing members. Our dedicated editors oversee each edit for accuracy and style. Find out more about articles.
132 results found
Article
Kugel's artery
An uncommon variant of coronary arterial anatomy, Kugel's artery was originally described as an anastomotic communication between branches of the proximal left circumflex artery with the distal right coronary artery. These coronary trunks often communicate indirectly through atrial anastomotic n...
Article
Myocardium
The myocardium defines the middle layer of the cardiac wall between the endocardium and the pericardium and forms the muscular part of the heart.
Gross anatomy
The myocardium represents the middle layer of the cardiac wall. It is located between the endocardium and the epicardial layer of the ...
Article
Crista terminalis
The crista terminalis is a smooth muscular ridge in the superior aspect of the right atrium, formed following resorption of the right valve of the sinus venosus. It represents the junction between the sinus venarum, the "smooth" portion of the right atrium derived from the embryologic sinus veno...
Article
Interarterial course of the right coronary artery
Interarterial course of the right coronary artery may occur if the right coronary artery (RCA) has an aberrant origin from the left coronary sinus. The interarterial course occurs because the artery passes between the ascending aorta and the pulmonary trunk.
It is an uncommon anatomic variant w...
Article
Aortic valve
The aortic valve (AV) is one of the four cardiac valves. It is the semilunar valve that allows blood to exit the left ventricle (LV). It opens during systole and closes during diastole.
The valve has left, right, and posterior cusps, the bases of which attach around the valve orifice to a fibro...
Article
Labeled imaging anatomy cases
This article lists a series of labeled imaging anatomy cases by body region and modality.
Brain
CT head: non-contrast axial
CT head: non-contrast coronal
CT head: non-contrast sagittal
CT head: non-contrast axial with clinical questions
CT head: angiogram axial
CT head: angiogram coronal
...
Article
Situs inversus
Situs inversus, (rare plural: sitūs inversi) short form of the Latin “situs inversus viscerum”, is a term used to describe the inverted position of chest and abdominal organs.
Terminology
The condition is called situs inversus totalis when there is a total transposition of abdominal and thorac...
Article
Thoracic aorta
The thoracic aorta is the most superior division of the aorta and is divided into three sections:
ascending aorta
aortic arch
descending aorta
The thoracic aorta begins at the aortic valve, located obliquely just to the left of the midline at the level of the third intercostal space. It term...
Article
Aortic root
The aortic root is the first part of the aorta containing parts of the aortic valve and connects the heart to systemic circulation.
Gross anatomy
The aortic root is located between the aortic annulus (the junction of the outflow tract of the left ventricle and the aortic valve) and the sinotu...
Article
Atrium (disambiguation)
Atrium (plural: atria) is a general term that refers to an anatomic cavity in an organ.
Atria are located in the:
heart:
right atrium
left atrium
brain:
atrium of the lateral ventricle
History and etymology
Atrium is the Latin word for the entrance or meeting room of a Roman house.
Article
Ventricle (disambiguation)
Ventricle (plural: ventricles) is a general term that refers to an anatomic cavity within an organ.
Ventricles are located in the:
brain:
lateral ventricles
third ventricle
fourth ventricle
heart:
right ventricle
left ventricle
larynx:
laryngeal ventricle (not to be confused with the v...
Article
Right coronary artery
The right coronary artery (RCA) is one of the two main coronary arteries that supply the heart with oxygenated blood.
Gross anatomy
Origin
The right coronary artery arises from its ostium in the right sinus of Valsalva, found between the aortic valve annulus and the sinotubular junction.
Co...
Article
Circumflex artery
The circumflex artery (Cx) is one of the two major coronary arteries that arise from the bifurcation of the left main coronary artery (the other branch being the left anterior descending (LAD) artery).
Terminology
The circumflex artery can be referred to by multiple terms:
circumflex artery (...
Article
Crux cordis
The crux cordis, cardiac crux or crux of the heart is an anatomical landmark and refers to the cross-shaped appearance of the posterior view or diaphragmatic surface of the heart 1-3.
Gross anatomy
The crux cordis is formed by the connection of the right and left atrioventricular groove and th...
Article
Inferior pyramidal space of the heart
The inferior pyramidal space of the heart is an area filled with epicardial adipose tissue at the backside or diaphragmatic side of the heart immediately beneath the crux cordis.
Gross anatomy
The inferior pyramidal space is a pyramid-shaped fibrofatty structure between the two septal atrial w...
Article
Atrioventricular septum
The atrioventricular (AV) septum or septal atrioventricular junction forms a central part of the heart, where the interatrial and interventricular septum crosses the atrioventricular annular plane and join with the septal tricuspid and anterior mitral leaflet attachments.
Terminology
On a four...
Article
Sinus of Valsalva
The sinuses of Valsalva, also known as aortic sinuses, are the anatomic spaces at the aortic root bounded internally by the aortic valve leaflets and externally by outward bulges of the aortic wall.
The normal sinus diameter upper limit is usually taken as 40 mm (with some publications suggesti...
Article
Left ventricular outflow tract
The left ventricular outflow tract (LVOT) (also sometimes called the aortic vestibule) is considered to represent the region of the left ventricle that lies between the anterior cusp of the mitral valve and the ventricular septum. It directs blood towards the aortic annulus and through the aorti...
Article
Left ventricle
The left ventricle is one of four heart chambers. It receives oxygenated blood from the left atrium and pumps it into the systemic circulation via the aorta.
Gross anatomy
The left ventricle is conical in shape with an anteroinferiorly projecting apex and is longer with thicker walls than the ...
Article
Aortic annulus
The aortic annulus is a fibrous ring at the aortic orifice to the front and right of the atrioventricular aortic valve and is considered the transition point between the left ventricle and aortic root. The annulus is part of the fibrous skeleton of the heart. It is at the level of the sinus of V...
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