Pericarditis: Symptoms, Diagnosis, Treatment, and Recurrent Disease

Assoc. Prof. Sezen Bağlan Uzunget, MD
Cardiologist

What Is Pericarditis?

Pericarditis is inflammation of the pericardium, the thin, double-layered sac surrounding the heart.

A small amount of fluid normally exists between the pericardial layers.

Inflammation may cause chest pain and, in some patients, accumulation of excess pericardial fluid.

Most patients recover with appropriate treatment. However, some experience recurrent episodes or develop complications.

What Are the Symptoms of Pericarditis?

The most characteristic symptom is chest pain.

Pericarditis-related chest pain often:

• Occurs in the center or left side of the chest
• Feels sharp or stabbing
• Worsens with deep breathing
• Increases with coughing
• Becomes more noticeable when lying flat
• Improves when sitting up and leaning forward

Other symptoms may include:

• Fever
• Fatigue
• Palpitations
• Shortness of breath
• Muscle or joint discomfort

Not every patient has all the typical features.

New chest pain should not be attributed to pericarditis based on its characteristics alone. Myocardial infarction and other serious causes must be considered.

What Causes Pericarditis?

1. Viral Infections

Viral infections are among the common causes of acute pericarditis.

Symptoms may develop after a respiratory infection.

However, a recent viral illness does not establish a definite viral cause.

2. Idiopathic Pericarditis

When no specific cause is identified, the condition is described as idiopathic pericarditis.

Viral or immune-mediated mechanisms may contribute to some cases.

3. Autoimmune and Inflammatory Disorders

Associated conditions may include:

• Systemic lupus erythematosus
• Rheumatoid arthritis
• Certain vasculitides
• Autoinflammatory disorders

4. Post-Cardiac Injury Syndromes

Pericarditis may occur after myocardial infarction or cardiac surgery.

5. Other Causes

These include:

• Bacterial infections
• Tuberculosis
• Uremia
• Malignancy
• Chest radiotherapy
• Certain medications

How Is Acute Pericarditis Diagnosed?

Diagnosis is based on clinical findings and supporting investigations.

Traditionally, at least two of the following four findings support the diagnosis:

1. Typical pericarditic chest pain
2. Pericardial friction rub
3. Typical ECG changes, such as widespread ST elevation or PR depression
4. New or worsening pericardial effusion

Inflammatory biomarkers and imaging findings provide additional diagnostic support.

1. Electrocardiography (ECG)

ECG findings may include:

• Widespread ST-segment elevation
• PR-segment depression
• Characteristic reciprocal changes in selected leads

However, typical ECG findings are not present in every patient.

A normal ECG does not exclude pericarditis.

2. Blood Tests

C-reactive protein (CRP) and other inflammatory markers may be elevated.

Elevated troponin may indicate associated myocardial injury.

3. Echocardiography

Echocardiography evaluates:

• Pericardial effusion
• Amount of pericardial fluid
• Ventricular function
• Findings suggesting cardiac tamponade

Pericarditis may occur without a detectable effusion.

4. Cardiac Magnetic Resonance Imaging

Cardiac MRI may be particularly helpful in diagnostically uncertain, recurrent, or treatment-resistant cases.

It can assess pericardial edema, thickening, and inflammation-related enhancement.

How Is Pericarditis Different from a Heart Attack?

Both conditions may cause chest pain and ECG abnormalities.

Pericarditis pain is often affected by breathing and body position, but this distinction is not always reliable.

ECG, troponin, echocardiography, and coronary imaging when indicated are used to distinguish the conditions.

What Is the Difference Between Pericarditis and Myocarditis?

Pericarditis affects the sac surrounding the heart.

Myocarditis affects the heart muscle itself.

Both may occur together.

When myocardial involvement is suspected, ventricular function and arrhythmia risk require additional assessment.

How Is Acute Pericarditis Treated?

Treatment depends on the underlying cause and clinical severity.

1. Nonsteroidal Anti-Inflammatory Drugs

Aspirin or ibuprofen is commonly used in suitable patients without contraindications.

These medications reduce pain and inflammation.

Drug selection and dosing should consider kidney function, gastrointestinal bleeding risk, associated conditions, and concurrent medications.

Gastroprotection may be appropriate.

2. Colchicine

Colchicine is an important treatment for acute and recurrent pericarditis.

When added to appropriate anti-inflammatory treatment, it reduces the risk of recurrence.

Treatment commonly continues for approximately three months after a first acute episode.

For recurrent pericarditis, treatment generally continues for at least six months.

Dosing should consider body weight, kidney and liver function, and drug interactions.

Gastrointestinal side effects, particularly diarrhea, may occur.

3. Corticosteroids

Corticosteroids are not the routine first-line treatment for uncomplicated acute pericarditis.

They may be considered in selected cases, including certain autoimmune disorders or when other treatments are unsuitable.

When used, the lowest effective dose and careful tapering are generally preferred.

Inappropriate corticosteroid use may increase the risk of recurrence or treatment dependence.

4. Physical Activity Restriction

Strenuous exercise should be avoided during active inflammation.

Return to activity depends on symptom resolution and control of inflammation.

Patients with associated myocarditis may require additional restrictions.

Why Is CRP Important in Pericarditis?

CRP is a marker of inflammation.

Changes in CRP can help assess treatment response.

However, treatment decisions should not rely on CRP alone.

Symptoms, clinical status, and imaging findings must also be considered.

What Is Recurrent Pericarditis?

Recurrent pericarditis refers to a new episode after a previous attack has resolved, usually following a symptom-free interval of at least four to six weeks.

Some patients experience multiple episodes.

Immune-mediated mechanisms, including interleukin-1 signaling, may contribute to recurrent disease.

Symptoms of Recurrence

Possible findings include:

• Recurrent characteristic chest pain
• Elevated CRP
• Pericardial effusion
• ECG or MRI evidence of inflammation

However, not every episode of chest pain represents recurrent pericarditis.

How Is Recurrent Pericarditis Treated?

Treatment may include:

• Appropriate anti-inflammatory medication
• Colchicine
• Corticosteroids in selected cases
• Targeted treatment for resistant or specific inflammatory phenotypes

IL-1 Inhibitors

In selected patients with frequent recurrences, colchicine resistance, or corticosteroid dependence, treatments targeting the IL-1 pathway may be considered.

Examples include:

• Anakinra
• Rilonacept

These treatments require specialist supervision and monitoring for infection risk and other adverse effects.

What Is Pericardial Effusion?

Pericardial effusion is an abnormal accumulation of fluid between the pericardial layers.

It may occur with pericarditis, but not every effusion is caused by pericardial inflammation.

Potential causes include:

• Infection
• Inflammatory disorders
• Malignancy
• Kidney failure
• Postoperative conditions
• Other systemic illnesses

Is Pericardial Effusion Dangerous?

Risk depends not only on the amount of fluid but also on how rapidly it accumulates and whether it interferes with cardiac filling.

A slowly developing large effusion may be tolerated, while a smaller rapidly accumulating effusion may cause serious hemodynamic compromise.

What Is Cardiac Tamponade?

Cardiac tamponade occurs when pressure from pericardial fluid prevents normal cardiac filling and impairs circulation.

It is a life-threatening emergency.

Symptoms and findings may include:

• Severe breathlessness
• Low blood pressure
• Tachycardia
• Weakness
• Syncope or altered consciousness
• Signs of shock

Urgent echocardiographic and hemodynamic assessment is necessary.

Emergency drainage may be required.

What Is Pericardiocentesis?

Pericardiocentesis is a procedure used to drain fluid from the pericardial space with a needle and catheter.

It can be lifesaving in cardiac tamponade.

It may also be performed for diagnostic purposes in selected patients.

Not every pericardial effusion requires drainage.

What Is Constrictive Pericarditis?

Constrictive pericarditis occurs when a thickened, fibrotic, or rigid pericardium restricts normal cardiac filling.

Symptoms may include:

• Shortness of breath
• Leg swelling
• Abdominal fluid accumulation
• Fatigue
• Reduced exercise tolerance

Echocardiography, CT, cardiac MRI, and occasionally invasive hemodynamic assessment may be used.

Some cases of transient inflammatory constriction respond to anti-inflammatory treatment.

Chronic, persistent constrictive pericarditis may require surgical pericardiectomy.

Which Patients with Pericarditis May Require Hospitalization?

Higher-risk features include:

• High fever
• Subacute onset
• Large pericardial effusion
• Cardiac tamponade
• Failure to respond to appropriate anti-inflammatory treatment
• Associated myocarditis
• Immunosuppression
• Recent trauma
• Oral anticoagulant therapy

These findings may warrant hospital monitoring and further investigation.

Can Pericarditis Heal Completely?

Many patients recover completely with appropriate treatment.

However, some develop recurrent episodes.

Recurrent pericarditis does not necessarily mean permanent myocardial damage.

Long-term outcomes depend on the underlying cause, associated myocardial involvement, and complications.

When Can Patients Exercise After Pericarditis?

Strenuous activity should be avoided during active inflammation.

Return to exercise depends on:

• Resolution of chest pain
• Normalization of inflammatory markers
• Appropriate recovery of ECG and imaging findings when relevant

Associated myocarditis requires a separate return-to-exercise assessment.

When Is Pericarditis a Medical Emergency?

Urgent assessment is necessary for:

• Severe or persistent chest pain
• Significant breathlessness at rest
• Syncope
• Marked hypotension
• Rapid clinical deterioration
• Suspected cardiac tamponade

Emergency medical care should not be delayed.

Frequently Asked Questions

Is pericarditis the same as a heart attack?

No. Pericarditis is inflammation of the pericardium, but its symptoms can resemble myocardial infarction.

Can troponin be elevated in pericarditis?

Yes, particularly when there is associated myocardial injury.

How long is colchicine prescribed?

It is commonly used for approximately three months after a first acute episode and for at least six months in recurrent disease, depending on clinical circumstances.

Can pericarditis return?

Yes. Recurrent episodes occur in some patients. Appropriate colchicine treatment reduces recurrence risk.

Is fluid around the heart always dangerous?

No. Risk depends on the amount of fluid, its rate of accumulation, and its effect on cardiac filling.

This content is provided for general educational purposes. Pericarditis diagnosis and treatment should be individualized according to clinical findings, inflammatory markers, echocardiography, and additional imaging when indicated.