Pericarditis

Pericarditis is inflammation of the pericardium, the thin, two-layered sac that surrounds and protects the heart. It often causes sharp chest pain and is usually treatable, but it needs medical assessment because symptoms can resemble other heart conditions.

Overview

Pericarditis is inflammation of the pericardium, the flexible sac that surrounds the heart. The pericardium has two thin layers with a small amount of lubricating fluid between them, allowing the heart to move smoothly as it beats. When these layers become irritated, they can rub against each other and cause chest pain, sometimes with extra fluid collecting around the heart.

Pericarditis may be acute, meaning it starts suddenly and lasts for a short period, or it may be recurrent, returning after symptoms have improved. Less commonly, inflammation can become persistent or lead to scarring of the pericardium. Most people recover well with appropriate medical care, but evaluation is important because chest pain can have several possible causes, including urgent heart and lung conditions.

The condition affects people of different ages and backgrounds. In many cases, no single cause is identified, although a recent viral illness is often suspected. A cardiologist or other qualified doctor will assess symptoms, examination findings and test results to confirm the diagnosis and choose the safest treatment approach.

Symptoms

The most common symptom of pericarditis is chest pain. It is often described as sharp, stabbing or aching, and it may be felt behind the breastbone or on the left side of the chest. A characteristic feature is that the pain may worsen when lying flat, coughing, swallowing or taking a deep breath, and may improve when sitting up and leaning forward.

Pericarditis symptoms can vary depending on the cause and whether fluid has accumulated around the heart. Some people feel generally unwell, similar to having an infection. Others may notice symptoms that overlap with heart rhythm problems or reduced heart filling if fluid pressure becomes significant.

• Sharp or pressure-like chest pain
• Pain spreading to the shoulder, neck, back or upper abdomen
• Shortness of breath, especially when lying down
• Low-grade fever, fatigue or weakness
• Palpitations or a sensation of a fast heartbeat
• Dry cough or discomfort with deep breathing
• Swelling of the legs or abdominal fullness in more complex cases

Because chest pain can also occur with heart attack, blood clots in the lungs, pneumonia and other serious conditions, a person should not try to diagnose pericarditis at home. Medical evaluation helps distinguish pericarditis from other causes and identifies whether urgent care is needed.

Causes & Risk Factors

Pericarditis can develop when the immune system reacts to infection, injury or another disease process affecting the body. Viral infections are a frequent trigger, and the inflammation may appear during or shortly after a respiratory or gastrointestinal illness. In many patients, the exact infectious agent is not confirmed, and the condition is described as idiopathic, meaning no clear cause is found after assessment.

Other causes include bacterial infections, tuberculosis in regions where it is common, autoimmune and inflammatory diseases, kidney failure, thyroid disease, trauma to the chest and certain cancers. Pericarditis can also occur after a heart attack, cardiac surgery, catheter-based heart procedures or radiation therapy involving the chest. Some medicines can rarely be associated with pericardial inflammation, so a full medication history is important.

Risk factors depend on the underlying cause. People with known autoimmune disease, chronic kidney disease, recent heart procedures, reduced immune function or a history of pericarditis may need closer evaluation if symptoms return. Recurrent pericarditis can happen when inflammation reappears after a symptom-free period, and it should be managed with specialist guidance to reduce the chance of further episodes.

Diagnosis

Diagnosis of pericarditis begins with a careful medical history and physical examination. The doctor will ask about the nature of chest pain, recent infections, previous heart problems, autoimmune disease, kidney disease, cancer treatment, medicines and recent procedures. During the examination, the doctor may listen for a pericardial friction rub, a scratchy sound that can occur when inflamed pericardial layers move against each other.

An electrocardiogram, also called an ECG, is commonly used because pericarditis can cause characteristic electrical changes. Blood tests may look for signs of inflammation, infection, heart muscle strain or damage, kidney function problems and autoimmune features when relevant. These tests also help differentiate pericarditis from conditions such as heart attack or myocarditis, which is inflammation of the heart muscle.

Imaging is important to check for fluid around the heart and to assess heart function. Echocardiography, an ultrasound scan of the heart, is often the first imaging test. In selected cases, chest X-ray, computed tomography or cardiac magnetic resonance imaging may be used to evaluate pericardial thickening, inflammation, complications or alternative diagnoses.

A diagnosis is based on the overall pattern rather than a single symptom. Doctors usually combine clinical findings with ECG changes, blood test results and imaging. If there is a significant pericardial effusion, meaning excess fluid around the heart, further tests may be needed to identify infection, cancer or inflammatory causes.

Treatment Options

Pericarditis treatment depends on the suspected cause, symptom severity, test results and whether complications such as significant fluid around the heart are present. The right approach should be decided by a cardiologist or qualified specialist after assessment. Many uncomplicated cases are managed with rest, monitoring and medicines that reduce inflammation and pain, while treating any underlying infection or medical condition when identified.

Medication categories may include anti-inflammatory pain-relieving medicines, medicines used to reduce the risk of recurrence in selected patients, and medicines that control immune-related inflammation when clearly indicated. If a bacterial infection, tuberculosis, autoimmune disease, kidney failure or cancer-related cause is suspected, treatment is directed at that specific condition. The choice of medicine depends on age, pregnancy status, kidney function, stomach or bleeding risk, other medical conditions and current medications.

Hospital care may be recommended for people with high fever, low blood pressure, large pericardial effusion, suspected infection, recent trauma, immune suppression, use of blood-thinning medication or signs that the heart is under pressure. In some cases, fluid around the heart must be drained with a procedure called pericardiocentesis. This is done to relieve pressure, improve circulation or analyze the fluid for diagnosis.

Surgery is not needed for most patients, but it may be considered in specific situations such as repeated large effusions, thickened and scarred pericardium affecting heart filling, or persistent disease that does not respond to other measures. Follow-up is an important part of treatment, because doctors may repeat blood tests or imaging to confirm that inflammation and fluid are improving before advising a return to full activity.

Living With / Prognosis

Most people with acute pericarditis improve with timely diagnosis, appropriate treatment and follow-up. Recovery time varies depending on the cause and severity. During recovery, doctors may advise limiting strenuous exercise until chest pain has resolved, inflammatory markers have improved and heart testing is reassuring, especially for athletes and people with physically demanding work.

Living with pericarditis often involves recognizing symptom patterns and attending scheduled follow-up visits. Patients should tell their doctor if symptoms return after improving, because recurrent pericarditis can require a different management plan. Keeping a list of medicines, recent infections, autoimmune symptoms and previous test results can help the care team make safer decisions.

Complications are uncommon when pericarditis is recognized and managed, but they can occur. A large fluid collection can sometimes compress the heart and reduce its ability to fill properly, a condition called cardiac tamponade. Long-lasting inflammation can rarely lead to constrictive pericarditis, where scarring makes the pericardium stiff and affects circulation.

Healthy general habits support recovery and heart health, including not smoking, following medical advice for chronic diseases, staying hydrated when appropriate and seeking care promptly for new chest symptoms. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat pericarditis for international patients, with care coordinated according to each patient’s clinical findings.

When to See a Doctor

A person should seek medical advice promptly for new chest pain, especially if it is sharp, persistent, associated with fever or worse when lying down or breathing deeply. Even when symptoms seem typical for pericarditis, a doctor needs to rule out other causes of chest pain and assess whether there is fluid around the heart.

Urgent medical care is needed if chest pain is severe, crushing or accompanied by shortness of breath, fainting, sweating, nausea, confusion, blue lips, very fast heartbeat or low blood pressure symptoms such as dizziness. These signs do not always mean a dangerous condition is present, but they require immediate assessment because several heart and lung conditions can look similar.

People already diagnosed with pericarditis should contact their doctor if symptoms worsen, return after improvement, or are accompanied by high fever, swelling of the legs, increasing breathlessness or poor tolerance of normal activity. Follow-up appointments should be kept even when symptoms improve, because repeat assessment helps confirm recovery and reduces the chance of missed complications.

Frequently asked questions

What is pericarditis?

Pericarditis is inflammation of the pericardium, the thin sac surrounding the heart. It often causes sharp chest pain and may occur after a viral illness or due to other medical conditions. A medical assessment is important because symptoms can resemble other heart or lung problems.

What does pericarditis chest pain feel like?

Pericarditis chest pain is often sharp or stabbing and may be felt in the center or left side of the chest. It commonly worsens when lying down, coughing or taking a deep breath, and may improve when sitting forward. However, chest pain patterns vary, so a doctor should evaluate new or persistent chest pain.

Is pericarditis the same as a heart attack?

No. Pericarditis is inflammation of the sac around the heart, while a heart attack is usually caused by blocked blood flow to heart muscle. Because both can cause chest pain and sometimes abnormal test results, doctors use ECG, blood tests and imaging to tell them apart.

Can pericarditis go away on its own?

Some mild cases improve over time, especially when related to a viral illness, but pericarditis should still be assessed by a doctor. Treatment may reduce pain, control inflammation and lower the risk of recurrence or complications. People should not ignore chest pain or self-treat without medical guidance.

How is pericarditis diagnosed?

Diagnosis usually includes a medical history, physical examination, ECG, blood tests and echocardiography. The doctor looks for signs of pericardial inflammation, fluid around the heart and other conditions that can cause similar symptoms. Additional imaging or fluid analysis may be used in selected cases.

What treatments are used for pericarditis?

Treatment may include rest, anti-inflammatory medicines, medicines to reduce recurrence risk in selected cases and treatment of an underlying infection or inflammatory condition. If significant fluid collects around the heart, drainage may be needed. The safest plan depends on the cause, test results and the patient’s overall health.

Can pericarditis come back?

Yes, pericarditis can recur after symptoms have improved, especially in some inflammatory or idiopathic cases. Recurrence should be evaluated by a doctor rather than managed at home. Follow-up testing and a specialist-guided treatment plan can help control inflammation and monitor recovery.

References

• European Society of Cardiology
• American Heart Association
• Mayo Clinic
• National Heart, Lung, and Blood Institute
• Cleveland Clinic

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.