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Constrictive Pericarditis – Causes and Treatment
Constrictive pericarditis is a chronic heart condition in which the pericardium becomes scarred and thickened, restricting the heart from filling properly.
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Constrictive pericarditis is a chronic heart condition in which the pericardium becomes scarred and thickened, restricting the heart from filling properly.
What is Constrictive Pericarditis?
Constrictive pericarditis is a chronic condition of the pericardium – the fibrous sac surrounding the heart – in which scarring, thickening, and often calcification of the pericardial layers occur. These structural changes prevent the heart from expanding and filling normally with blood during each heartbeat, leading to progressively impaired cardiac function. Unlike acute pericarditis, constrictive pericarditis develops slowly over months to years.
Causes
In many cases, no specific cause can be identified (idiopathic form). Known causes include:
- Previous pericarditis (inflammation of the pericardium) – the most common cause in developed countries
- Tuberculosis – the leading cause worldwide, particularly in developing countries
- Cardiac surgery or procedures (post-operative pericarditis)
- Radiation therapy to the chest area (e.g., for lymphoma or breast cancer)
- Autoimmune diseases such as systemic lupus erythematosus or rheumatoid arthritis
- Infections caused by viruses, bacteria, or fungi
- Renal failure (uremic pericarditis)
- Malignancies involving the pericardium
Symptoms
Symptoms arise from restricted cardiac filling and the resulting backup of blood in the venous circulation:
- Shortness of breath (dyspnea), especially during physical activity
- Fatigue and weakness
- Fluid retention in the abdomen (ascites) and legs (edema)
- Distended neck veins (elevated venous pressure)
- Enlarged liver (hepatomegaly)
- Weight gain due to fluid accumulation
- Kussmaul sign: a paradoxical rise in venous pressure during inhalation (clinically characteristic)
Diagnosis
Diagnosing constrictive pericarditis requires a combination of clinical assessment and imaging studies:
Physical Examination
Typical findings include distended neck veins, peripheral edema, abdominal swelling, and a characteristic early diastolic sound known as a pericardial knock heard on cardiac auscultation.
Imaging Studies
- Echocardiography: Identifies pericardial thickening, restricted cardiac filling, and characteristic filling patterns
- CT (Computed Tomography): Best method for visualizing pericardial thickening and calcifications
- MRI (Magnetic Resonance Imaging): Helps differentiate constrictive pericarditis from restrictive cardiomyopathy
- Chest X-ray: May reveal pericardial calcifications
- Cardiac catheterization: Demonstrates characteristic hemodynamic patterns (equalization of filling pressures)
Laboratory Tests
Blood tests can provide information about underlying inflammation, renal function, or associated diseases, but are not specific to diagnosing constrictive pericarditis.
Treatment
Conservative Management
In mild or early cases, anti-inflammatory medications such as colchicine, NSAIDs, or corticosteroids may be used to reduce inflammation. Diuretics help manage fluid retention and relieve symptoms.
Surgical Treatment: Pericardiectomy
The only curative treatment for advanced constrictive pericarditis is surgical removal of the thickened pericardium, known as pericardiectomy. During this procedure, the scarred pericardial tissue is largely or completely removed to relieve the mechanical restriction on the heart. The operation is typically performed via median sternotomy and carries a mortality rate of approximately 5–10%, depending on disease severity and the overall condition of the patient. Full recovery of cardiac function after surgery may take several months.
Prognosis
The prognosis depends on the underlying cause, disease severity, and timing of treatment. Early surgical intervention significantly improves long-term outcomes. Without treatment, cardiac function deteriorates progressively over time.
References
- Adler Y et al. - 2015 ESC Guidelines for the diagnosis and management of pericardial diseases. European Heart Journal, 2015; 36(42): 2921-2964.
- Imazio M, Brucato A, Mayosi BM et al. - Medical therapy of pericardial diseases. Journal of Cardiovascular Medicine, 2010; 11(10): 712-722.
- Bertog SC, Thambidorai SK, Parakh K et al. - Constrictive pericarditis: etiology and cause-specific survival after pericardiectomy. Journal of the American College of Cardiology, 2004; 43(8): 1445-1452.
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