The heart pumps oxygenated blood only, all deoxygenated blood goes through veins so i think you are thinking about the aorta, which is the most important artery. And the myocardium is just the second layer of the heart, it isn't a part per se.
cardiac vein
Superior vena cava
cardiac
The coronary veins drains the unoxygenated blood and empty it into the coronary sinus, which empties into the right atrium.
coronary sinus...cause it empties blood into the right atrium
The Right Coronary Artery supplies blood to the inferior myocardium
marginal branch posterior interventricular branch circumflex branch left coronary artery
The Great Coronary Vein drains the muscles of the heart. It ascends the anterior interventricular sulcus (groove between the two ventricles) around the left coronary groove (groove between the left atrium and left ventricle) and into the coronary sinus on the right atrium of the heart.
Coronary arteries
coronary
The myocardium receives blood from the coronary arteries.
The myocardium or heart muscle is nourished with oxygen-rich blood. The vessel that delivers the blood to the myocardium is called Coronary Arteries.
the coronary arteries
coronary arteries
The coronary arteries supply blood to the myocardium (heart muscle).