The heart is supplied with blood by the very first blood vessels that branch from the aorta.
These are the coronary arteries.
There are two arteries that supply the heart with blood.
The left coronary artery has an initial short segment (approximately 20 – 30 mm), the left main coronary artery, which quickly divides into two large branches.
The left anterior descending artery (LAD) supplies the front part of the heart.
The left circumflex artery (Cx) supplies the back part of the heart.
The right coronary artery (RCA) supplies the bottom of the heart.