What is cardiac sinus?

The coronary sinus is a collection of smaller veins that merge together to form the sinus (or large vessel), which is located along the heart’s posterior (rear) surface between the left ventricle and left atrium.

What drains into cardiac sinus?

The coronary sinus receives drainage from most epicardial ventricular veins, including the oblique vein of the left atrium (and other left and right atrial veins), the great cardiac vein, the posterior vein of the left ventricle, the left marginal vein, and the posterior interventricular vein.

Why coronary sinus is called sinus?

The name comes from the Latin corona, meaning crown, since this vessel forms a partial circle around the heart. The coronary sinus drains into the right atrium, at the coronary sinus orifice, an opening between the inferior vena cava and the right atrioventricular orifice or tricuspid valve.

How do you access the coronary sinus?

Access to the coronary sinus is best made by two combination systems with a steerable electrophysiology catheter or a telescoping inner catheter. Furthermore, special guiding catheters for the access from the right subclavian vein particularly to upgrade right-sided pacemakers and ICD systems have been developed.

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What causes enlarged coronary sinus?

The coronary sinus enlarges when it receives a left superior vena cava or a hepatic vein, when it is joined by a left superior vena cava that receives blood from the inferior vena cava via the hemiazygos vein.

Where does blood go after leaving the coronary sinus?

The coronary sinus delivers this blood to the right atrium before it eventually travels back to the lungs to be oxygenated again. The epicardial ventricular veins include: The great cardiac vein. The anterior interventricular veins.

What is sinus venosus in humans?

The sinus venosus is a cardiac chamber upstream of the right atrium that harbours the dominant cardiac pacemaker. During human heart development, the sinus venosus becomes incorporated into the right atrium.

How many sinuses are there in heart?

Structure. There are three pericardial sinuses: superior, transverse and oblique.

What do you mean by sinus?

The sinuses are four paired cavities (spaces) in the head. They are connected by narrow channels. The sinuses make thin mucus that drains out of the channels of the nose. This drainage helps keep the nose clean and free of bacteria. Normally filled with air, the sinuses can get blocked and filled with fluid.

Do all cardiac veins drain into the coronary sinus?

Venous Supply to the Heart. The great cardiac vein, the middle cardiac vein, and the small cardiac vein all drain into the coronary sinus (which opens into the right atrium).

Is the coronary sinus adjacent to the pulmonary valve?

The valve of the coronary sinus (Thebesian valve) is a semicircular fold of the lining membrane of the right atrium, at the orifice of the coronary sinus. It is situated at the base of the inferior vena cava.

Valve of coronary sinus.

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Valve of the coronary sinus
TA2 4030
FMA 9242
Anatomical terminology

Where is the coronary sinus on Echo?

The posterior vein of the left ventricle may be a single large vessel or consist of several smaller veins. Middle Cardiac Vein or Posterior Interventricular Vein.

What is an unroofed coronary sinus?

Unroofed coronary sinus (UCS) is a rare atrial septal defect (ASD) that results in an abnormal communication between the coronary sinus and the left atrium. It is usually associated with other forms of congenital heart disease, typically heterotaxy syndromes.