Pericardial Effusion: Is this something to worry about?

Have you ever heard of a story about 'water filling around the heart'? Maybe a friend of yours has had this happen to him. Or maybe you too have been feeling a little heavy in your chest and difficulty breathing these days. This is actually a bit scary. So today we are talking about this condition called `Pericardial Effusion` in medical science. What is it, why does it happen, is it dangerous, and what should we do, let's talk in a very simple way that you can understand.

Simply put, what is Pericardial Effusion?

Let's understand this this way. Our heart is not just an organ. It is surrounded by a thin sac, like a protective covering. We call this ``Pericardium``. The heart is inside this sac. Normally, there is a very small amount of fluid between this sac and the heart that helps the heart to slide easily without hitting each other when it beats. It's like oil in an engine.

Pericardial effusion is when, for some reason, much more fluid than normal accumulates inside this sac.

Imagine you are trying to inflate a balloon inside a plastic water bottle. When the bottle is empty, you have room to inflate the balloon as much as possible. But if you add a little water to the bottle, the balloon's room to inflate decreases. If you fill it with more water, eventually the balloon will not be able to inflate at all.

The same thing happens to our heart. The heart is like a balloon. The sac around it (the `pericardium`) is the bottle. As this sac fills with water (fluid), the space for the heart to pump freely and fill with blood decreases.

• As fluid builds up: The sac around the heart has time to stretch and enlarge. So you may not feel much discomfort until a large amount of fluid has accumulated.
• When fluid builds up all at once: This is dangerous. This can happen in something like an accident. Then the sac doesn't have time to drain. Even a small amount of fluid can cause the heart to become stiff and lose its function.

What are the situations where this could be dangerous?

Yes, this condition can sometimes be a life-threatening emergency. We call it `Cardiac Tamponade` .

Simply put, `Cardiac Tamponade` is when the heart fills with fluid, causing it to become so compressed that it has no room to move or fill with blood. Imagine that bottle is completely filled with water, and the balloon does not inflate at all.

If the heart is not filled with blood, it cannot pump blood to the rest of the body. When blood does not reach the brain, kidneys, and liver, those organs lose their function. This condition is called `Cardiogenic Shock`. This is very dangerous. If not treated immediately, death can occur within a few minutes or even hours.

What are the symptoms of this condition?

If the amount of fluid accumulated is small, you may not have any symptoms. However, when the amount of fluid increases, or in an emergency situation such as `Cardiac Tamponade`, symptoms appear.

Let's see what the main symptoms are in the table below.

Additionally, when the amount of fluid around the heart becomes too large, it can press on nearby organs, such as the lungs, nerves, or esophagus. Symptoms such as these may also occur:

• Difficulty swallowing food (Dysphagia)
• Hiccups
• Coughing or hoarseness

Why is this happening? What are the reasons?

There is not one reason why fluid fills around the heart, there can be many reasons. Sometimes no cause can be found. But there are a few main factors that affect it.

• Infections: This condition can be caused by various viral and bacterial infections. Tuberculosis is a major cause, especially in countries like Sri Lanka. HIV infection can also be a factor.
• Cancer: Cancer that occurs in the heart itself or cancer that has spread to the heart (metastasis) from elsewhere in the body can damage the lining around the heart and cause it to fill with fluid.
• Immune system diseases: Inflammation caused by diseases that attack the body's own cells, such as lupus (SLE) and rheumatoid arthritis, can cause fluid to build up.
• Hormonal problems: Conditions such as hypothyroidism.
• Chest injuries: Serious injuries such as a severe blow to the chest from a car accident or a stab wound.
• Heart disease: Conditions such as heart attack, heart valve disease, or aortic dissection.
• Other medical causes: It can also occur after heart surgery, after radiation therapy for cancer, or as a side effect of some medications.
• Other medical conditions: This condition can also occur due to increased fluid accumulation in the body due to diseases such as kidney failure and liver cirrhosis.

How do you find this, Doctor?

If you have symptoms, your doctor will ask you questions and examine you to make a diagnosis. Sometimes it can be found incidentally during a chest X-ray done for another reason.

The doctor will order several tests to confirm this condition and find the cause.

• Electrocardiogram (ECG): Checks the electrical activity of the heart.
• Echocardiogram: This is the most important test. It's like a scan of a baby. It can clearly see how much fluid is around the heart and whether it's affecting how well the heart is working.
• Chest X-ray: If there is a lot of fluid, the shadow of the heart will be larger.
• CT Scan or MRI Scan: These can provide a more detailed picture of the heart and surrounding structures.
• Blood tests: Blood tests can be very helpful in finding the cause. For example, `Complete Blood Count (CBC), `Troponin` (to check for heart disease), thyroid hormone levels, and tests for immune system diseases.

What are the treatments for this?

The treatment depends on how serious your condition is and what is causing it.

However, if the fluid level increases rapidly, you have symptoms, or if an emergency condition such as cardiac tamponade has developed, immediate treatment is needed.

There are two main treatment methods:

1. Liquid removal in an emergency

This involves removing the excess fluid around the heart, allowing the heart to function freely.

• Pericardiocentesis: In this procedure, the skin on the chest is numbed, a thin needle is inserted into the sac around the heart under the guidance of an echocardiogram, and excess fluid is withdrawn using a syringe. Sometimes a small tube may be left in place for several days to continue draining the fluid.
• Surgical removal of fluid: Sometimes surgery is necessary. In a procedure called ``Video-assisted thoracic surgery (VATS),`` a camera is inserted through a small incision and a small "window" is created in the sac around the heart. The excess fluid is then drained into the large cavity around the lungs, where it is absorbed into the body.

2. Treating the underlying cause

After the fluid is removed, to stop the fluid from filling back up, the underlying cause must be treated.

• If there is an infection, antibiotics are given.
• If it is due to swelling, anti-inflammatory drugs are given.
• If it is due to cancer , chemotherapy or radiation treatment is used.
• If you have kidney disease, you may need to undergo dialysis .

What happens after treatment? How long does it take to recover?

How quickly you recover and how long it takes to recover depends on several things:

• The reason for the fluid filling.
• The severity of the condition.
• The treatment you received.
• Your overall health.

In an emergency situation like `Cardiac Tamponade`, you will start to feel great relief as soon as the fluid around the heart is removed. Your doctor will usually be the best person to give you an idea of ​​your recovery time.

If the condition is caused by a serious cause, such as cancer or an accident, the chances of recovery may be somewhat lower. However, if the cause cannot be found, or if it is caused by something like a simple infection, the chances of a full recovery are much higher.

When do you suddenly need to go to ETU?

This is the part you should pay the most attention to . If you know you have `Pericardial Effusion`, or if you suddenly develop one or more of the following symptoms, go to a hospital's Emergency Department (`ETU`) immediately. These could be signs of `Cardiac Tamponade`.

Be very careful about these symptoms. Timely treatment can save your life.