What main arteries supply blood to the myocardium?

Coronary arteries supply blood to the heart muscle. Like all other tissues in the body, the heart muscle needs oxygen-rich blood to function.

How does the myocardium receive its blood supply?

The myocardium receives its blood supply from the coronary arteries. Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.

What are the 4 major arteries?

By definition, an artery is a vessel that conducts blood from the heart to the periphery. All arteries carry oxygenated blood–except for the pulmonary artery. The largest artery in the body is the aorta and it is divided into four parts: ascending aorta, aortic arch, thoracic aorta, and abdominal aorta.

What are the 5 main arteries of the heart?


  • Left coronary artery (LCA) Left anterior descending artery. Left circumflex artery. Posterior descending artery. Ramus or intermediate artery.
  • Right coronary artery (RCA) Right marginal artery. Posterior descending artery.

What artery supplies the most blood?

The aorta (the main blood supplier to the body) branches off into two main coronary blood vessels (also called arteries). These coronary arteries branch off into smaller arteries, which supply oxygen-rich blood to the entire heart muscle. The right coronary artery supplies blood mainly to the right side of the heart.

Does the myocardium receives its blood supply from the coronary artery?

The myocardium (muscle of the heart) receives oxygenated blood from the coronary arteries.

Does the atrium receive blood?

Each side has an atrium (which receives blood as it enters) and a ventricle (from which blood is pumped out). The heart has a total of four chambers: right atrium, right ventricle, left atrium and left ventricle.

What are the 3 major veins?

The aorta is the large artery leaving the heart. The superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood from the abdomen and legs into the heart.

What are the 2 major veins?

The two largest veins in the body are the superior vena cava, which carries blood from the upper body directly to the right atrium of the heart, and the inferior vena cava, which carries blood from the lower body directly to the right atrium.

What are the 3 arteries of the heart?

Right Coronary Artery (RCA)

  • Right marginal artery.
  • Posterior descending artery.

What is the heart’s main artery called?

The largest artery is the aorta, the main high-pressure pipeline connected to the heart’s left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries’ smaller branches are called arterioles and capillaries.

Why is coronary blood flow highest when the myocardium is relaxed?

This is due to a strong contraction particularly from the left ventricle which compresses the intramuscular vessels. During Diastole the cardiac muscle relaxes, enabling blood to flow through the capillaries with no obstruction.

What does right coronary artery supply?

The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes, which regulate the heart rhythm. The right coronary artery divides into smaller branches, including the right posterior descending artery and the acute marginal artery.

What does the LAD supply?

The left anterior descending artery (LAD) supplies the anterior two-thirds of the septum. [2] The LAD is one of two major branches of the LMCA, with the other being the left circumflex (LCx) coronary arteries. Combined, these two supply blood to the left atrium and left ventricle.

What is myocardium infarction?

A heart attack (myocardial infarction) happens when one or more areas of the heart muscle don’t get enough oxygen. This happens when blood flow to the heart muscle is blocked.

What is LAD and LCX?

LAD: Left anterior descending artery; LCX: Left circumflex artery; RCA: Right coronary artery; RV: Right ventricle; OM: Obtuse marginal artery; LV: Left ventricle.

What is CAG and PTCA?

Background and purpose: Coronary artery angiography (CAG) and percutaneous transluminal coronary angioplasty (PTCA) are important procedures for the diagnosis and treatment of patients with coronary artery disease.

What is RCA and LAD?

RCA, Right coronary artery; LAD, Left anterior descending artery.

What is Ramus artery?

The ramus intermedius is a variant coronary artery resulting from trifurcation of the left main coronary artery 1. It is present in ~20% (range 15-30%) 23 of the population.

What is trifurcation of artery?

Abstract. Trifurcating coronary artery disease is a complex atherosclerotic process involving the origin of one or more of three side branches arising from a main coronary artery vessel or trunk (MT), with or without involvement of the MT itself.

Is the circumflex artery a main artery?

The circumflex artery (Cx) is one of the two major coronary arteries that arise from the bifurcation of the left main coronary artery (the other branch being the left anterior descending (LAD) artery).

What is LM coronary artery?

Left main coronary artery (LMCA).

The left main coronary artery divides into branches: The left anterior descending artery branches off the left coronary artery and supplies blood to the front of the left side of the heart. The circumflex artery branches off the left coronary artery and encircles the heart muscle.

What structure collects deoxygenated blood from the myocardium?

Coronary veins

Coronary veins are responsible for draining deoxygenated blood from the myocardium into the cardiac chambers.

What do the coronary arteries supply quizlet?

Supplies blood to right atrium, portions of both ventricles and cells of AV nodes and SA node.

Which coronary artery is most responsible for?

The coronary artery that is the most responsible for supplying blood to the myocardial tissue of the left atrium is option (d) the circumflex artery….

Which artery is the most important?

The most important artery is called the left anterior descending artery (LAD). It feeds blood to the whole front wall of the heart, which represents much more muscle than the area fed by either of the other two coronary arteries.

How many main arteries are in the heart?

The Coronary Arteries are the blood vessels that supply blood to your heart. They branch off of the aorta at its base. The right coronary artery, the left main coronary, the left anterior descending, and the left circumflex artery, are the four major coronary arteries.