Constrictive Pericarditis

Overview

Constrictive pericarditis is a chronic condition in which the thin membrane surrounding the heart (the pericardium) becomes thickened, stiffened, and calcified as a result of inflammation. The hardened pericardium wraps around the heart like a rigid shell, preventing it from expanding freely. This leads to a situation in which the heart cannot fill adequately with blood and therefore cannot pump enough blood to meet the body's needs.

In a healthy heart, the pericardium is a thin, flexible, two-layered membrane. The heart expands and contracts freely with each beat. In constrictive pericarditis, the pericardium thickens, stiffens, and in some cases accumulates calcium deposits, forming what is essentially a hard casing around the heart. This rigid casing does not allow the heart to expand comfortably. The heart cannot receive enough blood during the filling phase. As a result, the amount of blood pumped to the body decreases and a picture similar to heart failure develops.

Constrictive pericarditis is a rare but serious condition. Its symptoms can easily be mistaken for those of other conditions such as heart failure or liver disease. For this reason, reaching a diagnosis often takes time. Accurate diagnosis is critical because the treatment of this condition is entirely different from the other diseases it can resemble.

Symptoms of Constrictive Pericarditis

The symptoms of constrictive pericarditis develop gradually and in many cases emerge over a period of years. They arise from the heart's inability to fill and empty properly.

• Shortness of breath. This is the most common symptom. Initially it occurs only with exertion — climbing stairs or walking quickly can bring on breathlessness. As the disease progresses, breathing may become difficult even with mild activity or at rest. Shortness of breath may worsen when lying flat.
• Fatigue and weakness. Because the heart cannot pump enough blood, the muscles and organs do not receive sufficient oxygen. This leads to a persistent sense of fatigue and weakness. Completing everyday tasks becomes increasingly difficult.
• Swelling in the legs and feet. When the filling pressure on the right side of the heart increases, blood begins to pool in the veins. This causes noticeable swelling, first in the legs and ankles. The swelling may be more pronounced by the end of the day.
• Abdominal swelling and discomfort. If blood backs up in the veins leading to the liver, the liver enlarges and a feeling of discomfort, fullness, or pain develops in the abdominal area. In advanced stages, fluid can accumulate in the abdominal cavity (ascites), causing visible abdominal distension and pain.
• Distended neck veins. Visibly swollen and prominent jugular veins in the neck are an important and characteristic finding in constrictive pericarditis. This is particularly noticeable in the seated position.
• Loss of appetite and weight loss. Fluid accumulation in the abdomen and liver enlargement affect the digestive system negatively. Appetite decreases, eating becomes uncomfortable, and weight loss may develop over time.
• Cough. Fluid accumulation around the lungs (pleural effusion) can cause a cough. This cough is usually dry and may worsen when lying down.
• Palpitations. Irregularities in heart rhythm can develop. Atrial fibrillation in particular may be seen in association with constrictive pericarditis.

The symptoms of constrictive pericarditis closely resemble those of other conditions such as heart failure, cirrhosis, or nephrotic syndrome. For this reason, the diagnostic process can take time and requires a thorough evaluation.

When to See a Doctor

See a doctor in the following situations:

• If unexplained fatigue and shortness of breath are present together and are affecting daily life, an evaluation should be done.
• If you notice swelling in your legs or abdomen — especially if it develops and worsens quickly — see a doctor.
• If you notice that the veins in your neck appear swollen or more prominent than usual, seek a cardiology evaluation.
• If you have previously had pericarditis, tuberculosis, cardiac surgery, or chest radiotherapy and new symptoms are developing, contact your doctor.

Causes of Constrictive Pericarditis

Constrictive pericarditis can develop following any inflammation or injury affecting the pericardium. In some cases, however, no clear cause can be identified.

• Tuberculosis. This is the most common cause of constrictive pericarditis worldwide. When tuberculosis bacteria reach the pericardium, they trigger severe inflammation. Over time, this inflammation leads to thickening and stiffening of the pericardium. In developing countries where tuberculosis is prevalent, the great majority of constrictive pericarditis cases are attributable to this cause. In developed countries, non-tuberculous causes are more prominent.
• Idiopathic (unknown cause) or viral pericarditis. This is the most common cause in developed countries. A previous episode of pericarditis — particularly one of viral origin — can leave permanent damage to the pericardium. Not every case of pericarditis progresses to constrictive pericarditis; this complication develops relatively rarely.
• Cardiac surgery. Following open heart surgery, pericardial tissue can be damaged and may thicken and stiffen during the healing process. Bypass surgery, valve surgery, or operations for congenital heart disease can increase the risk of constrictive pericarditis. This complication may appear months or years after the surgery.
• Chest radiotherapy. Radiotherapy used in the treatment of lung cancer, lymphoma, or breast cancer can affect the pericardium. Radiation damage can lead to fibrosis (stiffening) of the pericardium over the course of years. For this reason, people who have received chest radiotherapy should be followed up with long-term cardiac monitoring.
• Connective tissue diseases. Autoimmune conditions such as rheumatoid arthritis, lupus, and scleroderma can affect the pericardium. In these conditions, the immune system mistakenly attacks pericardial tissue, causing inflammation that can over time lead to constriction.
• Bacterial infections. Bacteria such as staphylococci or streptococci can reach the pericardial space and cause purulent (pus-forming) pericarditis. Even when this severe infection is treated, it can leave permanent damage to the pericardium.
• Kidney failure (uremic pericarditis). In advanced kidney failure, urea that accumulates in the blood has a toxic effect on the pericardium and can lead to the development of pericarditis. As dialysis treatment has become more widespread, this cause has become less common.
• Trauma. Severe blunt force or penetrating injuries to the chest can damage the pericardium. Constrictive pericarditis may develop following this type of injury.
• Medications. In rare cases, certain medications can affect the pericardium. Hydralazine, procainamide, and some chemotherapy agents are among those that may be involved.

Diagnosis of Constrictive Pericarditis

Constrictive pericarditis is difficult to diagnose. Because its symptoms closely resemble those of other conditions, more than one test must be evaluated together to reach a diagnosis.

• Physical examination. Your doctor listens to the heart sounds. In constrictive pericarditis, a distinctive early diastolic sound known as a "pericardial knock" may be heard. Distension of the neck veins, swelling in the legs, and fluid accumulation in the abdomen are assessed.
• Electrocardiography (ECG). An ECG is not sufficient to diagnose constrictive pericarditis, but it can show rhythm disturbances and changes in the heart muscle. Low-voltage ECG findings and atrial fibrillation may be seen.
• Chest X-ray. A chest X-ray can show the size of the heart, calcification of the pericardium, and fluid around the lungs. Pericardial calcification is an important clue pointing toward constrictive pericarditis, though it is not present in every patient.
• Echocardiography. Cardiac ultrasound is very valuable in diagnosing constrictive pericarditis. Thickening of the pericardium, abnormalities in the filling of the heart chambers, and characteristic changes in heart motion can be seen. In particular, evaluating the pressure changes within the heart chambers during breathing makes a major contribution to the diagnosis.
• Cardiac MRI and CT. These imaging methods provide a very clear picture of the thickness, stiffness, and calcification of the pericardium. Cardiac MRI can also assess whether there is active inflammation in the pericardium. It is particularly helpful in distinguishing constrictive pericarditis from another condition called restrictive cardiomyopathy.
• Cardiac catheterization. This is a specialized test in which pressures inside the heart are measured directly. The characteristic pressure pattern of constrictive pericarditis is clearly demonstrated by this test. It is typically performed when the diagnosis cannot be confirmed by echocardiography and imaging methods alone.
• Blood tests. Inflammation markers (CRP, ESR), tuberculosis tests, indicators of autoimmune disease, kidney function, and liver enzymes are evaluated. These help identify the underlying cause.

Treatment of Constrictive Pericarditis

Treatment is determined based on the stage and severity of the disease and the underlying cause.

• Treating the underlying cause. In tuberculosis-related constrictive pericarditis, anti-tuberculosis medications are used. In bacterial infection, antibiotic therapy is given. In autoimmune conditions, corticosteroids and immunosuppressive medications may be prescribed. If the disease has not yet become fully established in its early stages, treating the underlying cause may allow the pericardium to recover and surgery may be avoided.
• Medication. Medications cannot cure constrictive pericarditis but can temporarily relieve symptoms. Diuretics (water pills) reduce excess fluid in the body, alleviating swelling and shortness of breath. If a heart rhythm disturbance is present, appropriate medications can be used. Medication alone is not sufficient as a definitive treatment — it is most often used for supportive purposes while preparing for surgery.
• Pericardiectomy (pericardialdecortication). This is the definitive and permanent treatment. During surgery, the thickened and stiffened pericardial tissue is surgically removed. This allows the heart to expand and contract freely once again. Following a successful pericardiectomy, patients experience significant and lasting improvement. This is a major operation requiring expertise in open heart surgery. The surgical risk varies depending on the patient's overall condition and the severity of the disease.
• Recovery after surgery. Recovery after pericardiectomy takes time. Fatigue and limited exercise capacity may persist while the heart adjusts to its new state. Full recovery can take several months. Regular follow-up and rehabilitation are very important during this period.
• Patients who cannot undergo surgery. For patients in whom surgery is not appropriate due to advanced age, serious coexisting conditions, or very advanced disease, supportive treatment is continued. Diuretics, salt restriction, and activity modification help improve quality of life.

Living with Constrictive Pericarditis

Receiving a diagnosis of constrictive pericarditis can be challenging. However, with accurate diagnosis and appropriate treatment, many patients improve significantly.

• Expectations after surgery. Following successful pericardiectomy, the great majority of patients report significant improvement. Shortness of breath decreases, swelling subsides, and exercise capacity increases. Full recovery, however, can take several months. Those with longstanding or severe disease may have a longer recovery period.
• Regular follow-up. Both patients who have undergone surgery and those who have not require regular cardiology follow-up. Heart function, symptoms, and medication effectiveness are evaluated at regular intervals.
• Lifestyle adjustments. Salt restriction, avoiding excessive fluid intake, and refraining from extreme physical exertion help with symptom management. Adjust your activity level according to your doctor's recommendations.
• Monitoring the underlying condition. If there is an underlying cause such as tuberculosis, an autoimmune disease, or kidney failure, follow-up for these conditions should not be neglected.

Preparing for Your Appointment

Seeing a doctor with suspected constrictive pericarditis can feel overwhelming. Going prepared makes both the diagnostic process and treatment planning easier.

What you can do:

• Note when symptoms such as shortness of breath, fatigue, and swelling began and how they have progressed.
• Mention whether you have previously had pericarditis, tuberculosis, cardiac surgery, or chest radiotherapy.
• List all medications you are taking.
• Mention if you have been diagnosed with an autoimmune condition such as rheumatoid arthritis or lupus.
• Bring any previous echocardiography, ECG, or imaging results if available.
• Write your questions down in advance.

Questions you can ask your doctor:

• What stage is my condition at?
• Is surgery necessary?
• What happens if surgery is not performed?
• What are the risks of surgery?
• What does the recovery process look like?
• What symptoms should prompt me to go to the emergency room?
• How often do I need to be monitored?
• Should I restrict salt and fluid intake?

Your doctor may ask you:

• When did the symptoms begin and how have they progressed?
• Have you previously had pericarditis or inflammation of the heart?
• Have you been diagnosed with tuberculosis?
• Have you had cardiac surgery or chest radiotherapy?
• Do you have an autoimmune condition such as rheumatoid arthritis or lupus?
• Have you been diagnosed with kidney disease?
• Do you have swelling in your legs or abdomen?
• What medications are you taking?