part of part of tributary of tributary of vessel drains blood from system heart heart left ventricle heart blood vessel thoracic vein great vein of heart left marginal vein 14/04/2025 13:00:33 A vein that is a tributary of the great cardiac vein (left coronary vein) and drains blood from the left ventricle of the heart. It courses with the left marginal artery as it travels superiorly along the left cardiac border. FMA:4708