Which vein drains blood from the anterior surface of the heart?

• A. Great Cardiac Vein.
• B. Small Cardiac Vein.
• C. Middle Cardiac Vein.
• D. Oblique Vein.

Answer: (A)

Understanding how the heart’s veins drain different surfaces helps explain why this vein is correct. The front (anterior) surface of the heart is drained mainly by the great cardiac vein, which travels in the anterior interventricular sulcus alongside the left anterior descending artery. It collects blood from the areas supplied by the left coronary circulation—the anterior wall of the left ventricle and the interventricular septum—and then drains into the coronary sinus, which empties into the right atrium.

The other veins shown drain different regions: the small cardiac vein drains parts of the right atrium and right ventricle along the right marginal artery; the middle cardiac vein drains the posterior aspects of the ventricles and the posterior interventricular septum; the oblique vein drains the left atrium. Since the anterior surface is specifically drained by the great cardiac vein, it is the correct choice.