Medical management of constrictive pericarditis

What is Constrictive Pericarditis?

A rare but deadly illness, constrictive pericarditis, stiffens and thickens the heart's sac, preventing it from expanding and pumping blood. Untreated, it can cause heart failure, but quick diagnosis and surgery can manage or cure it.

Risk of pericarditis

Constrictive pericarditis: what happens?

• Normal pericardium: A thin, flexible, fluid-filled heart cushion.
• Constrictive pericarditis scars, thickens, or calcifies the pericardium, restricting blood flow to the heart chambers.
• Heart pressure rises, cardiac output drops, and heart failure symptoms develop.

Symptoms

• Respiratory distress
• Chest pain
• Fatigue, dizziness
• Leg or abdominal swelling
• Reduced appetite and muscle
• Eating rapidly and feeling full

Risks, complications

• Heart failure, arrhythmias, infections, or death if untreated.
• Surgery risks: Arrhythmias, infection, or persistent symptoms in advanced disease.
• Early diagnosis and treatment enhance outcomes.

Cause of Constrictive Pericarditis?

• Main Causes of Constrictive Pericarditis
• The TB infection causes chronic pericardial inflammation and scarring. The leading cause in India, Asia, and Africa, 20–30% of TB pericarditis infections induce constriction.
• Idiopathic viral infections are common. Industrialized nations tend to have a higher prevalence of such infections.
• Invasive heart surgery. Pericardial scarring after surgery. After heart surgery, 0.2–0.4% of people experience it.
• Radiation therapy for breast cancer and lymphoma can harm the pericardium. A known cause in developed nations.
• Lupus, rheumatoid arthritis, and Sjögren's syndrome. Chronic inflammation causes fibrosis.
• Trauma: Chest wounds.Less common but reported.
• Metastasis or direct pericardial involvement. Rare but conceivable.
• End-stage renal illness causes uremia. Modern causes are emerging.
• Not known. The cause is unknown and is typically attributed to a virus. It accounts for many cases.

Important Information

Constrictive pericarditis is not communicable; TB infections can be. The problem is caused by pericardial scarring and rigidity; recognizing the source is critical for treatment (medications vs. surgery).

Acute vs. constrictive pericarditis

Acute pericarditis is a short-term inflammation caused by infections or autoimmune diseases, while constrictive pericarditis is a chronic scarring and thickening that limits heart function. Constrictive pericarditis may necessitate pericardiectomy, while acute pericarditis usually responds to treatment.

Key: Acute vs. Constrictive Pericarditis

• Feature: Acute Pericarditis Pericarditis constricts
• Definition: Pericardial inflammation suddenly. Continuous pericardial scarring, thickening, or calcification.
• Rapid onset (hours to days). Slow to advance (weeks, months, years).
• Causes include viral (most common), bacterial (TB), autoimmune, trauma, heart surgery, and radiation. Prior cardiac surgery, radiation therapy, chronic inflammation, autoimmune disease, idiopathic disease, and tuberculosis (the leading cause in India).
• Sharp chest pain (worse lying down, better leaning forward), fever, palpitations, and shortness of breath. Fatigue, leg/abdominal swelling, shortness of breath, appetite loss, dizziness, and heart failure.
• Excessive fluid buildup, cardiac tamponade, recurrence, and constrictive pericarditis are complications. Chronic heart failure, arrhythmias, fluid retention, and death without treatment.
• Diagnostics: ECG (ST elevation, PR depression), echocardiography (effusion), blood tests (CRP, ESR), and chest imaging. TB/autoimmune testing, echocardiogram, CT/MRI (pericardial thickening), and cardiac catheterisation (pressure alterations).
• NSAIDs, colchicine, corticosteroids (autoimmune), antibiotics (bacterial/TB), and rest are treatments. Symptom-relieving diuretics, cause-specific medications (TB treatment), and pericardiectomy for cure.
• Most patients recover totally with treatment. Untreated instances proceed to cardiac failure, but treatment often restores normal life.

How to Diagnose Constrictive Pericarditis?

Diagnosis steps

1. Medical history/physical exam

• Doctors evaluate patients for heart failure signs (swelling, tiredness, and dyspnea).
• The classic sign is Kussmaul's (neck vein distension worsens with inhalation).
• Muffled or pericardial heart sounds are possible.

2 Imaging Tests

• Ultrasound of the heart
• Displays abnormal cardiac filling.
• Recognizes pericardial effusion.
• A chest X-ray
• May show pericardial calcification.
• CT or MRI
• Detailed pericardial thickening, scarring, and calcification photos.
• Separates restrictive cardiomyopathy from constrictive pericarditis.

3. ECG

• Possible nonspecific alterations (low voltage, cardiac fibrillation).
• Used to rule out alternative chest discomfort or arrhythmia causes.

4. Gold Standard Cardiac Catheterisation

• Measures heart chamber pressures.
• Right and left ventricular pressures equalise abnormally during diastole in constrictive pericarditis.
• Confirms tight pericardium limitation.

5. Blood Tests

• Determine the root causes:
• Tuberculosis testing is prevalent in India.
• Lupus and rheumatoid arthritis markers.
• Testing kidney function (uremia-related pericarditis).

Constrictive Pericarditis Treatment and Medication

The video is about A new way to care for constrictive pericarditis patients

Treatment Choices

1. Surgery: Final Cure

• Pericardiectomy: Pericardium removal.
• It is the most effective and gold standard treatment.
• Without the pericardium, the body functions normally.
• After recuperation, most patients resume normal life.
• Disease progression, arrhythmias, infection, and death are possible.
• For best results, start early, before serious heart failure occurs.

2. Medical Care

• This is used for non-surgical patients or for pre-surgery care.
• Diuretics
• Reduce leg and abdominal fluid.
• Use caution because reducing blood volume too much reduces cardiac output.
• NSAIDs, steroids
• NSAIDs and steroids can be beneficial in treating temporary or inflammatory constrictive pericarditis effectively.
• Ibuprofen, Naproxen, corticosteroids.
• Drugs for specific causes
• Antibiotics/anti-TB therapy: For tuberculosis (common in India).
• To treat autoimmune diseases, including lupus or rheumatoid arthritis.

Adjustments in lifestyle

• A low-salt diet reduces fluid retention.
• Fluid restriction in difficult situations.
• Activity modification during flare-ups.

3. Support

• Arrhythmias, infections, and worsening heart failure are monitored.
• Regular imaging and follow-up: to monitor therapy response.
• Nutritional support: for appetite and muscle loss.

Risks and Factors

• Surgery risk: Advanced heart failure or other comorbidities increase.
• Drug risks: Diuretics may cause dehydration or electrolyte imbalance.
• Long-term adverse effects and immune loss might result from steroids.
• Regional context: In India, tuberculosis is the predominant cause; hence, treatment is key.

Related Constrictive Pericarditis Conditions

1. Acute Pericarditis

• Sudden pericardial inflammation, usually viral or idiopathic.
• Relation: Untreated acute pericarditis causes 9% constrictive pericarditis.
• Sharp chest pain, fever, and pericardial friction rub.

2. Pericarditis effusion-constriction

• Constriction and fluid accumulation (effusion).
• Fluid pressure can produce cardiac tamponade, which stops the heart from beating.
• Treatment: Fluid drainage and constriction management.

3. Restrictive Cardiomyopathy

• Stiffening of the heart muscle, not the pericardium.
• This condition bears similarities to both constrictive pericarditis and heart failure.
• Key Difference: Imaging and catheterisation demonstrate a normal pericardium but aberrant myocardium.

4. Cardiac Tamponade

• Definition: Rapid pericardial fluid buildup compresses the heart.
• This condition is a complication of effusive-constrictive pericarditis.
• Shock, low blood pressure, severe dyspnea.

5. Autoimmune/inflammatory diseases

• Examples: Lupus, RA, and Sjögren's syndrome.
• Relation: Chronic inflammation scars the pericardium, constricting it.

6. TB Pericarditis

• Definition: TB-related pericardial infection.
• Relation: 20–30% of Indian TB pericarditis cases become constrictive.
• Important: TB is the most significant cause in developing nations.

7. Post-Op/Radiation Pericarditis

• Chest radiotherapy and heart surgery can scar the pericardium.
• This is more common in developed countries where TB is less prevalent.

Major Risks and Issues

• Restricted filling causes heart failure.
• Heart rhythm abnormalities.
• Advanced cases include pulmonary edema, liver and renal failure.
• Clinical overlap between restrictive cardiomyopathy and constrictive pericarditis increases the risk.

 Conclusion

Scarring and stiffness of the pericardium, the heart's protective sac, causes constrictive pericarditis, a dangerous but curable heart ailment. Heart failure symptoms include edema, tiredness, and dyspnea due to blood flow restriction.

Many pericardial illnesses terminate in constrictive pericarditis. Early detection and treatment of acute pericarditis or TB can stop progression. Surgery can save and cure the rare illness; thus, awareness is crucial.