Where is the coronary sinus located?

The coronary sinus is situated in the posterior atrioventricular (AV) groove, which is also referred to as the coronary sulcus. This anatomical location is significant because the coronary sinus serves as the primary venous drainage system for the heart, collecting blood from the cardiac veins and returning it to the right atrium. The positioning of the coronary sinus is critical for maintaining the efficiency of the heart's circulatory system, as it allows for the collection of deoxygenated blood from the myocardium.

Understanding the relationship of the coronary sinus to other structures is essential for echocardiography and various cardiac interventions. The posterior AV groove places the coronary sinus in proximity to the right atrium and the tricuspid valve, making its location vital for procedures such as catheterizations and in interpreting echocardiographic images. This spatial context is crucial for healthcare professionals to consider in both diagnostic and therapeutic settings.