What is coronary vein?

Coronary veins are thin-walled blood vessels that drain blood from the myocardium (heart muscle) and empty it into the right atrium of the heart. There are three main coronary veins:

1. Great Cardiac Vein (Anterior Cardiac Vein):

- The great cardiac vein runs along the anterior surface of the heart.

- It collects blood from the anterior regions of the left and right ventricles and drains it into the right atrium.

2. Middle Cardiac Vein (Posterior Cardiac Vein):

- The middle cardiac vein runs along the posterior (back) side of the heart.

- It drains blood from the posterior regions of the left and right ventricles into the coronary sinus.

3. Small Cardiac Vein (Oblique Vein of the Left Atrium):

- The small cardiac vein drains blood from the left atrium and empties into the coronary sinus.

These coronary veins play a vital role in ensuring proper circulation of blood within the heart. They collect deoxygenated blood from the heart tissue, transporting it back to the right atrium, where it can be pumped to the lungs for oxygenation.