Download Coronary Sinus Thebesian Veins Gallery. Venous blood from the heart is drained into right atrium by the following:a. The smallest cardiac veins (or thebesian veins) are minute valveless veins in the walls of all four heart chambers.

The Coronary Vascular System And Associated Medical Devices Thoracic Key
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The coronary sinus is a collection of veins joined together to form a large vessel that collects blood from the heart muscle (myocardium). The coronary sinus is the main vein of the heart, located on the posterior surface in the coronary sulcus, which runs between the left atrium and left ventricle. The coronary sinus starts at the junction of the great cardiac vein and the oblique vein of the left atrium.

The coronary sinus is the main vein of the heart, located on the posterior surface in the coronary sulcus, which runs between the left atrium and left ventricle.

Absent tributaries of coronary sinus. The thebesian veins/vessels were first studied by french anatomist raymond vieussens and german anatomist adam christian thebesius, from whom they derive their name, who both described the vascular network in their research of the coronary circulation. The coronary sinus is a short (approximately 2 cm) and wide venous channel that runs from left to right in the posterior portion of the coronary groove. The great coronary vein empties into the coronary sinus, which in turn empties into the pulmonary artery into the right atrium.