Yes. Pericarditis is inflammation of the thin sac around the heart, and it can cause extra fluid to collect in the space between the sac’s layers. This is called a pericardial effusion. A small amount may cause no symptoms, while fluid that builds up quickly or puts pressure on the heart can be dangerous. An echocardiogram is commonly used to check for the fluid and its effect on the heart.
How Can Pericarditis Cause Fluid Around the Heart?
The heart is surrounded by a thin, protective sac called the pericardium. This sac has two layers, with a small amount of fluid between them to reduce friction as the heart beats. Pericarditis develops when these layers become inflamed, causing irritation and sometimes allowing additional fluid to collect around the heart.
According to the American Heart Association, the pericardium normally contains a small amount of fluid that helps the heart move smoothly. When inflammation develops, fluid can accumulate in the space around the heart. The amount collected varies, and not every episode of pericarditis results in a noticeable fluid buildup.
The UK National Health Service (NHS) explains that inflammation of the pericardium can allow fluid or blood to leak into the sac. When excess fluid collects there, the condition is known as a pericardial effusion.
Does Everyone With Pericarditis Develop a Pericardial Effusion?
No. Pericarditis can occur without a significant buildup of fluid, and the presence of fluid around the heart does not automatically mean that pericarditis is the cause. The two conditions can occur together, but a healthcare professional must assess the available findings to determine what is happening.
According to Cleveland Clinic, pericardial effusion has several possible causes in addition to inflammation of the pericardium. These include infections, certain immune system disorders, kidney disease, cancer, chest injuries, and complications following heart surgery or other medical procedures.
When fluid is found around the heart, identifying its likely cause is important because treatment depends on the underlying condition as well as the amount of fluid and its effect on the heart.
What Symptoms Can Occur When Fluid Builds Up Around the Heart?
Symptoms depend on whether the main problem is inflammation, fluid accumulation, or pressure on the heart. Pericarditis commonly causes chest pain, while a pericardial effusion may cause no noticeable symptoms, especially when the fluid collects slowly. When the buildup is substantial or develops quickly, symptoms may become more apparent.
The Mayo Clinic notes that excess fluid around the heart can be associated with breathing difficulties, chest discomfort, and lightheadedness. Experiences that may occur include:
- Chest pain or discomfort: Pericarditis may cause sharp or aching pain that becomes worse with a deep breath or when lying down.
- Shortness of breath: Breathing may become difficult, particularly when lying flat or during activity.
- Chest pressure or fullness: Some people experience a feeling of tightness or pressure in the chest.
- Rapid or pounding heartbeat: The heartbeat may feel faster or more noticeable than usual.
- Dizziness or fainting: These symptoms can occur when the buildup interferes with the heart's ability to pump blood effectively.
- Fatigue: Unusual tiredness may occur, particularly when normal circulation is affected.
These symptoms can have several causes. Chest pain, in particular, should not automatically be attributed to pericarditis because heart and lung conditions can produce similar symptoms.
When Can Fluid Around the Heart Become Dangerous?
The main concern is whether the accumulated fluid places enough pressure on the heart to interfere with its normal filling and pumping. This depends not only on the amount of fluid but also on how quickly it collects and how the heart responds.
One serious complication is cardiac tamponade. This occurs when pressure from fluid surrounding the heart prevents the heart chambers from filling properly. As a result, the heart may be unable to pump enough blood to meet the body's needs. Cardiac tamponade is a medical emergency that requires immediate treatment.
A small, slowly developing effusion may cause few or no symptoms, whereas a smaller amount that accumulates rapidly can sometimes have a greater effect on heart function. For this reason, the amount of fluid alone does not determine how serious the condition is.
Seek emergency medical care for sudden or persistent chest pain, severe difficulty breathing, or unexplained fainting. These symptoms can indicate a serious heart or lung problem and should not be dismissed as a routine feature of pericarditis.
How Do Doctors Diagnose Fluid Around the Heart?
Healthcare professionals consider symptoms, medical history, physical examination findings, and test results when assessing possible pericarditis or pericardial effusion. They may also consider recent infections, heart procedures, injuries, and other medical conditions that could help explain the findings.
An echocardiogram, which uses sound waves to create images of the heart, is a key test for detecting fluid around the heart. It can help show how much fluid has collected and whether the accumulation is affecting the heart's ability to fill and pump blood.
The Mayo Clinic's guidance on diagnosing pericarditis describes several other tests that may be used, depending on the situation:
- Electrocardiogram (ECG): Records the heart's electrical activity and may show changes associated with pericarditis.
- Blood tests: May help identify signs of inflammation, infection, or heart muscle injury.
- Chest X-ray: May show changes in the apparent size or shape of the heart.
- CT scan or cardiac MRI: May provide additional information about the pericardium, surrounding tissues, or possible causes of the fluid.
In selected cases, a healthcare professional may recommend taking a sample of the fluid for testing. This can help investigate the cause when the available information does not provide a clear explanation.
How Is Fluid Around the Heart Treated When Pericarditis Is the Cause?
There is no single treatment for every pericardial effusion. The approach depends on the amount of fluid, whether it is increasing, whether symptoms are present, how well the heart is functioning, and what caused the fluid to collect.
When inflammation is responsible, treatment may include prescribed anti-inflammatory medicines. Colchicine may also be used for pericarditis in appropriate cases. If an underlying infection or another medical condition is identified, treatment is directed at that cause. Medicines should be selected by a healthcare professional because the appropriate treatment depends on the person's medical history and the suspected cause.
According to the American Heart Association's guidance on treating pericarditis, some complications require procedures to remove excess fluid. If an effusion is small, stable, and not causing symptoms or affecting heart function, monitoring may be appropriate instead.
When fluid accumulates rapidly, causes significant symptoms, or leads to cardiac tamponade, drainage may be necessary. A procedure called pericardiocentesis uses a needle or catheter to remove excess fluid from the space around the heart. Surgery may be considered in selected cases, such as when another drainage approach is needed or fluid continues to recur.
What Is the Outlook for Pericarditis With Fluid Around the Heart?
The outlook depends on the cause of the inflammation, the amount and rate of fluid accumulation, and whether heart function is affected. When the underlying problem responds to treatment and the fluid does not interfere with the heart, the outlook may be favorable. Some effusions resolve as the underlying condition improves, while others need continued monitoring or drainage.
Follow-up care helps healthcare professionals check whether inflammation is settling and whether the amount of fluid is changing. An additional echocardiogram may be recommended when needed to assess the fluid and how well the heart is working. If symptoms persist or worsen, the care plan may need to be reassessed.
Pericarditis can therefore cause fluid to collect around the heart, but the presence of fluid does not always mean that a dangerous complication will develop. Prompt assessment, appropriate testing, and treatment based on the underlying cause help guide care.