What do coronary arteries supply

There are two main coronary arteries — the left main coronary artery and the right coronary artery. As you might guess, the left main coronary artery brings blood to the left ventricle and atrium. That artery divides up into two branches — the left anterior descending artery and the circumflex artery.

The left descending artery supplies blood to the front left side of the heart, and circumflex artery supplies the outside and the back of the heart with blood. The right coronary artery supplies the right side — the right ventricle, right atrium, sinoatrial node SA node , and the atrioventricular node AV node.

The SA and AV nodes regulate the heart rhythm. Like the left main coronary artery, the right coronary artery divides into branches — the right posterior descending artery and the acute marginal artery. The right coronary artery has two jobs — pump blood to the lungs and supply the bottom portion of the left ventricle and the back of the septum with blood.

The right side of the heart is smaller because it pumps blood only to the lungs. The left coronary artery, which branches into the left anterior descending artery and the circumflex artery, supplies blood to the left side of the heart. Like all other tissues in the body, the heart muscle needs oxygen-rich blood to function. Also, oxygen-depleted blood must be carried away. The coronary arteries wrap around the outside of the heart.

Small branches dive into the heart muscle to bring it blood. Left main coronary artery LMCA. The left main coronary artery supplies blood to the left side of the heart muscle the left ventricle and left atrium.

Topic Overview The coronary arteries deliver blood to the heart muscle, providing a continuous supply of oxygen and nutrients needed for it to stay healthy and function normally. Supply and demand The coronary arteries regulate the supply of blood to your heart muscle depending on how much oxygen your heart needs at the time, as indicated by: The number of times your heart beats per minute heart rate.

Your blood pressure. The force of your heart's contractions. The thickness of your heart muscle. Anatomy of the coronary arteries Your left ventricle pumps blood into the main artery of your body, called the aorta. The left main coronary artery is a short vessel that branches into the: Left anterior descending artery, which supplies blood to the front anterior wall and part of the side anterolateral wall of the left ventricle, to the top of the left ventricle, and to most of the wall between the ventricles interventricular septum.

Circumflex artery, which passes behind the heart between the left atrium and left ventricle and supplies blood to the side lateral wall of the left ventricle. In a small number of people, the circumflex artery supplies the lower and back portions of the left ventricle. The right coronary artery supplies blood to the right ventricle and then supplies the underside inferior wall and backside posterior wall of the left ventricle.

What are collateral coronary arteries?