= Great cardiac vein
The \b[great cardiac vein] ascends in the <anterior interventricular sulcus> with the <left anterior descending artery>, then turns into the <coronary sulcus> toward the <coronary sinus>.<Anatomy and Physiology 2e by J. Gordon Betts and others>[§19.1, Coronary Veins]{ref} These two successive landmarks make its route easier to reconstruct than a list of isolated vessel names.
For example, an anterior view shows the portion near the ventricular boundary, whereas following the same <vein> around the left side of the <heart> reveals its relation to the atrial–ventricular boundary. The change of surface direction does not create a different venous drainage system. It is one connected return route within the <coronary circulation>.
The relationship to nearby arteries is variable. In a series of 37 dissected hearts, the <great cardiac vein> was adjacent to the <circumflex artery> within the <coronary sulcus> in $76\%$ of specimens; other configurations occurred in the remainder.<The anatomy of the coronary sinus and its tributaries by J. R. Ortale and others>[Abstract, coronary-sulcus relationships]{ref} This makes a useful experimental distinction between finding a common pattern and demonstrating a necessary anatomical rule. A vessel's observed course supports identification, but its connection to the <coronary sinus> and the direction of tissue return supply the functional meaning. Proximity to a <coronary artery> does not mean that the <vein> carries the same <blood> directly from that artery without intervening tissue exchange.
Back to article page
