Which vein drains coronary blood from the apex and septum of the heart?

The great cardiac vein plays a vital role in draining coronary blood, particularly from the apex and septum of the heart. It begins at the apex of the heart and runs along the interventricular septum, collecting blood from the anterior regions supplied by the left coronary artery. The vein ultimately empties into the coronary sinus, which is the main vessel that drains the majority of the heart’s venous blood.

The other choices refer to different veins with specific drainage patterns. For example, the middle cardiac vein primarily drains the posterior part of the heart and returns blood from the area supplied by the right coronary artery. The coronary sinus itself collects blood from several cardiac veins but is not a vein that drains directly from the apex and septum. The small cardiac vein also has its own specific drainage area and does not serve the same function as the great cardiac vein. Therefore, understanding the anatomical pathways and territories of these veins clarifies why the great cardiac vein is the correct choice for draining coronary blood from the apex and septum.