Shall we talk about the 'Circumflex Artery', which is very important for heart health?

The heart is like the engine of our body. So, to keep this engine working, it needs a constant supply of blood, that is, oxygen and nutrients. In order for the heart to pump blood to the whole body, there is a separate system of small veins that supply blood to the heart. We call these the coronary arteries. One very important member of that system is the `Circumflex Artery`. Today, let's talk about who this is, what it does, and what happens if it has a problem.

Simply put, what is the Circumflex Artery?

Okay, think of it this way. We have two main coronary arteries that carry blood to our heart. The right and the left. This left main coronary artery divides into two other main branches. One of those branches is the `Circumflex Artery` (the other is called the `Left Anterior Descending (LAD) artery`). Doctors sometimes call this the `LCx artery` for short.

The main function of this vein is to supply clean, oxygenated blood to the pumping chambers on the left side of our heart. That is:

• Left atrium - Where oxygenated blood from the lungs first collects.
• Left ventricle - The main and strongest chamber of the heart that pumps blood to the entire body.
• The papillary muscles inside the left ventricle.

Where is this vein located? Does it branch?

The circumflex artery is located within the epicardium, the outer protective layer of the heart. It runs along a groove-like section between the upper and lower chambers (atrium and ventricle) on the left side of the heart.

Yes, just like the branches of a tree, this vein also branches off into smaller branches. The number of these branches can vary. There are usually about three branches, called `obtuse marginal branches.' These small branches travel down the outside of the left ventricle of the heart.

What is 'Dominance' in the blood supply to the heart?

This is a bit medical, but it's easy to understand. There is another important artery called the `posterior descending artery (PDA)` that supplies blood to the back of our heart. So, your `coronary arterial dominance` is determined by whether this `PDA` artery in your body receives blood from the right coronary artery or a branch on the left side (i.e. `Circumflex` or `LAD`).

This is something that varies from person to person.

What diseases affect the Circumflex Artery?

Like other coronary arteries, the main and most dangerous condition that affects the `Circumflex Artery` is coronary artery disease (CAD) . Simply put, it is the blockage of the arteries by fat and cholesterol deposits.

Just as dirt and rust build up in a water pipe over time, things like fat and cholesterol build up in these arteries, forming a layer called `(plaque)`. We call this `(atherosclerosis).` As this ``plaque`` layer gradually grows, the blood flow inside the artery narrows. Eventually, the blood flow is obstructed.

How do you know if a vein is blocked? What are the symptoms?

Angina occurs when an artery becomes narrow and the heart does not get enough blood.You may experience chest pain or tightness, known as angina. This can be a sign of a heart attack, so you should be very careful about these symptoms.

If you have one or more of the following symptoms, it is a medical emergency . You should go to a hospital's Emergency Department (ETU) immediately.

How do doctors check the condition of the veins?

Doctors use several special tests to check the health of your coronary arteries, also known as the 'circumflex' arteries.

• Cardiac Catheterization (Angiogram): This is the most important test. A small tube is inserted through a vein in the arm or leg, threaded to the coronary arteries of the heart, injected with a special fluid, and X-rays are taken to see if there are any blockages in the veins.
• Coronary Computed Tomography Angiogram (CCTA): This is a special CT scan that can produce three-dimensional (3D) images of the blood flow in the heart.
• Intravascular Ultrasound (IVUS): This involves passing a small ultrasound device inside the vein, allowing the size and nature of the plaque layer attached to the vein wall to be seen very clearly.
• Fractional Flow Reserve (FFR): A test that measures blood pressure before and after a blockage in a vein to determine exactly how much the blockage affects the heart's function.

How do you treat a blocked vein?

The main treatment used to reopen a blocked circumflex artery or other coronary artery is angioplasty and stenting .

In this, a small balloon-tipped tube is passed through the artery to the blocked area, just like an angiogram. The balloon is then inflated to push the plaque against the artery wall, widening the blood flow. Then, a small mesh tube called a stent is placed in the area to prevent the narrowed area from narrowing again. This helps maintain good blood flow in the long term.

What can I do to keep my heart healthy?

There are many things you can do to keep your entire heart and vascular system healthy, not just your circumflex artery. The best thing to do is to incorporate these into your lifestyle.

• Be physically active: Exercise for at least 30 minutes most days of the week. Walking, running, or swimming are good options.
• Eat a heart-healthy diet: Reduce foods high in oil, salt, and sugar. Include fruits, vegetables, legumes, small fish, and whole grains in your diet.
• Maintain a healthy weight: Maintaining a weight that is appropriate for your height is very important.
• Avoid smoking completely: Smoking is one of the biggest enemies of the heart's arteries.
• Control diabetes and high blood pressure: If you have these conditions, talk to your doctor to take the prescribed medications and keep them well controlled.
• Reduce stress: Try to relax your mind through things like yoga and meditation.

By following these things, you can live a long life with a healthy heart. If you ever have any questions about your health, consult your family doctor for advice.