The coronary sinus is the major venous tributary of the greater cardiac venous system; it is responsible for draining most of the deoxygenated blood leaving the myocardium.
What is the main function of the coronary sinus?
Function: The coronary sinus serves as the primary collector of cardiac venous blood.
What is the coronary sinus?
The coronary sinus is a large vein that that returns deoxygenated blood from the heart muscle to the right side of the heart so that it can be replenished with oxygen.
What opens into coronary sinus?
The coronary sinus opens into the atrium, between the orifice of the inferior vena cava and the atrioventricular opening. The opening of coronary sinus returns blood from the substance of the heart and is protected by a semicircular valve, the valve of the coronary sinus (valve of Thebesius).
Why is it called coronary 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.
What is the function of the coronary sinus IVC and SVC?
The function of the coronary sinus is to drain the venous blood from the majority of the heart. It opens into the right atrium between the opening of inferior vena cava, the fossa ovalis and the right atrioventricular orifice.
Does coronary sinus have valves?
It is situated at the base of the inferior vena cava. The valve may vary in size, or be completely absent. It may prevent the regurgitation of blood into the sinus during the contraction of the atrium. This valve may be double or it may be cribriform. … Valve of coronary sinus.
| Valve of the coronary sinus | |
|---|---|
| TA2 | 4030 |
| FMA | 9242 |
| Anatomical terminology |
How many sinuses does the heart have?
There are three sinuses in the pericardial space: superior, transverse, and oblique. The two pericardial space sinuses that can be accessed in electrophysiological (EP) procedures are the transverse and oblique sinuses.
How many sinuses are there in heart?
Structure. There are three pericardial sinuses: superior, transverse and oblique.
Where is the sinus of the heart?
The sinus node is an area of specialized cells in the upper right chamber of the heart. This area controls your heartbeat. Normally, the sinus node creates a steady pace of electrical impulses.
What is the function of the coronary sinus quizlet?
The coronary sinus collects venous blood and drains deoxygenated blood from the heart wall directly into the right atrium of the heart.
What is the difference between coronary sinus and coronary sulcus?
The coronary sinus, the length of which varies from 15 to 65 mm, is found at the posterior part of the coronary sulcus on the diaphragmatic or posterior surface of the heart and is the principal collector of the venous blood of the heart.
Where does the coronary sinus develop from?
Development. The coronary sinus develops from one of the two sinus horns of the sinus venosum. The other horn becomes part of the right atrium. The right venous valve of the sinus venosum develops into the thebesian valve and the Eustachian valve.
What is the myocardium?
The muscle layer of the heart is termed the myocardium and is made up of cardiomyocytes. The myocardium is found in the walls of all four chambers of the heart, though it is thicker in the ventricles and thinner in the atria.
Which vein continues as the coronary sinus?
great cardiac vein The great cardiac vein commonly continues until it merges with the coronary sinus [7]. The lateral veins, also known as the left marginal veins or the obtuse marginal veins, course along the left side of the heart and drain the left ventricular myocardium into the great cardiac vein or coronary sinus [7].
What is Koch’s triangle?
Koch’s triangle, named after the German pathologist and cardiologist Walter Karl Koch, is an anatomical area located in the superficial paraseptal endocardium of the right atrium, which its boundaries are the coronary sinus orifice, tendon of Todaro, and septal leaflet of the right atrioventricular valve.
What is tributaries of coronary sinus?
The tributaries of the coronary sinus are Great cardiac vein, middle cardiac vein, small cardiac vein, posterior vein of the left ventricle and oblique vein of the left atrium.
What chamber of the heart do the SVC and IVC empty into?
The superior vena cava and inferior vena cava are veins that return deoxygenated blood from circulation in the body and empty it into the right atrium. The pulmonary artery carries deoxygenated blood from the right ventricle into the lungs for oxygenation.
Which chamber of the heart does the coronary sinus empty into answer?
right atrium Coronary sinus drains the blood from most of the heart muscle and empties in the right atrium posteriorly, close to the opening of the tricuspid valve.
What is thespian valve?
The Thebesian valve, also known as the valve of the coronary sinus, is a fold in the right atrium at the opening of the coronary sinus 1. The valve can create difficulties and interfere with the cannulation of the coronary sinus during cardiac resynchronization therapy (CRT) 1.
What valve guards the coronary sinus?
The Thebesian valve (TV) is an embryological caudal remnant of the sinoatrial valves. It is a fold of endocardial tissue that guards the coronary sinus ostium (CSO) and is quite variable in shape.
What is the function of Thebesian valve?
The Thebesian valve is a caudal remnant of the embryonic sinoatrial valves. Whether it has any role in normal physiology is not known and some believe that it may prevent the regurgitation of blood into the sinus during the contraction of the atrium.
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.
Where is the ostium of the coronary sinus?
The CS ostium is 5–15 mm in diameter and is located on the posterior interatrial septum anterior to the Eustachian ridge and valve and posterior to the tricuspid annulus. 11,17 The ostium is often covered, to a variable extent, by the Thebesian valve.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.