Overview
Constrictive pericarditis (CP) is a chronic inflammatory condition characterized by the thickening and calcification of the pericardium, leading to impaired diastolic filling, reduced cardiac output, and often heart failure. It primarily affects individuals with a history of infectious etiologies, particularly tuberculosis, though idiopathic causes and post-cardiac intervention scenarios are also common. Given its significant morbidity and mortality, early recognition and appropriate management are crucial in clinical practice to prevent long-term complications and improve patient outcomes 124.Pathophysiology
Constrictive pericarditis arises from chronic inflammation that results in the transformation of the pericardium into a rigid, fibrotic structure. This rigidity impedes the normal movement of the heart within the pericardial sac, leading to impaired ventricular filling during diastole. The thickened pericardium restricts the heart's ability to expand, causing ventricular interdependence where the filling of one ventricle affects the others due to shared pericardial constraints 12. Additionally, the loss of normal pericardial compliance disrupts the transmission of respiratory pressures, further compromising diastolic function. Over time, these mechanical constraints lead to right-sided heart failure symptoms, such as jugular venous distension and peripheral edema, alongside signs of systemic congestion 13.Epidemiology
The incidence of constrictive pericarditis varies globally, with idiopathic causes predominating in Western countries and infectious etiologies, particularly tuberculosis, remaining prevalent in developing regions 46. Historically, tuberculosis was the leading cause, but its prevalence has decreased in many areas due to improved public health measures. Post-cardiac surgery and radiation therapy are increasingly recognized causes, especially in regions with advanced medical interventions 6. Age and sex distribution show no significant predilection, though the condition can develop years after initial insults such as surgery or radiation therapy, highlighting the importance of long-term follow-up 6.Clinical Presentation
Patients with constrictive pericarditis typically present with symptoms of right heart failure, including fatigue, dyspnea, ascites, and peripheral edema. Common physical exam findings include elevated jugular venous pressure, Kussmaul's sign (inverted jugular venous waveform with inspiration), and pericardial knock on auscultation. Less commonly, patients may exhibit signs of left heart failure or systemic congestion. Red-flag features include unexplained weight loss, fever, and signs of pericardial effusion, which may suggest an ongoing infectious process 124.Diagnosis
The diagnosis of constrictive pericarditis involves a combination of clinical evaluation and imaging techniques. Key diagnostic criteria include:Clinical Criteria:
- History of pericarditis or predisposing conditions (e.g., tuberculosis, post-cardiac surgery, radiation therapy).
- Presence of right heart failure symptoms.
- Pericardial knock on auscultation.
- Jugular venous distension with or without Kussmaul's sign.Imaging and Diagnostic Tests:
- Echocardiography: Pericardial thickening (≥3-4 mm), interventricular septal flattening with inspiration, restrictive filling pattern, and reduced respiratory variation in IVC diameter.
- Cardiac MRI: Pericardial thickness >3-4 mm, evidence of ventricular interdependence, and absence of pericardial effusion.
- Cardiac Catheterization: Square root sign on pressure tracings, equalization of diastolic pressures, and ventricular interdependence (systolic area ratio >1.1).Differential Diagnosis:
- Restrictive Cardiomyopathy: Typically lacks pericardial thickening and has different hemodynamic patterns.
- Pulmonary Hypertension: May present with similar symptoms but lacks pericardial knock and characteristic echocardiographic findings.
- Right Ventricular Hypertrophic Disorders: Often associated with specific etiologies (e.g., congenital heart disease) and distinct imaging features.Management
Surgical Management
Pericardiectomy is the mainstay of treatment for constrictive pericarditis, aiming to relieve pericardial constriction and improve cardiac function.Surgical Techniques:
- Total Pericardiectomy: Removal of the entire pericardium, often performed via sternotomy or left anterior thoracotomy.
- Extracorporeal Circulation: Routine use of cardiopulmonary bypass (CPB) to facilitate complete pericardial resection, reducing the risk of incomplete dissection and postoperative complications 113.Specific Considerations:
- Suppurative Pericarditis: Left anterior thoracotomy preferred to minimize sternum infection risk.
- Postoperative Care: Close monitoring for signs of residual constriction, heart failure, and respiratory dysfunction.Medical Management
Preoperative:
- Diuretics: To manage fluid overload and ascites.
- Inotropic Support: For hemodynamic stabilization.
- Anticoagulation: To prevent thromboembolic events, especially in those with atrial fibrillation.Postoperative:
- Close Monitoring: Regular assessment of cardiac function, fluid balance, and signs of infection.
- Pain Management: Adequate analgesia to facilitate early mobilization.
- Immune Support: In cases of infectious etiology, appropriate antibiotic therapy based on culture and sensitivity results.Complications
Acute Complications:
- Residual Constriction: Incomplete pericardial resection leading to persistent symptoms.
- Infection: Postoperative empyema or pericarditis.
- Cardiac Dysfunction: Acute heart failure or arrhythmias.Long-term Complications:
- Myocardial Atrophy: Potential for long-term cardiac dysfunction despite successful surgery.
- Recurrent Constriction: Rare but possible due to pericardial scarring or reformation.
- Multiple Organ Failure: Particularly in high-risk surgical candidates.Management Triggers:
Persistent symptoms post-surgery warrant re-evaluation for residual constriction or other complications.
Fever, leukocytosis, or signs of sepsis necessitate prompt infectious workup and management.Prognosis & Follow-up
The prognosis for patients with constrictive pericarditis varies based on the underlying etiology and the timing of intervention. Early surgical intervention generally yields better outcomes, with operative mortality rates ranging from 5% to 20% 12. Long-term survival can be compromised due to residual cardiac dysfunction or recurrent constrictive physiology.Follow-up Intervals:
- Immediate Postoperative: Daily monitoring for the first week.
- Short-term (1-3 months): Regular echocardiograms and clinical assessments.
- Long-term (6-12 months): Periodic evaluations to monitor cardiac function and address any late complications.Special Populations
Pediatrics: Less common but requires careful consideration of growth and development post-surgery.
Elderly: Higher surgical risk; multidisciplinary care is essential.
Comorbidities: Patients with concurrent heart disease, renal failure, or immunosuppression require tailored perioperative management to mitigate risks 16.Key Recommendations
Surgical Intervention: Perform total pericardiectomy with routine use of cardiopulmonary bypass to ensure complete pericardial resection [Evidence: Strong] 113.
Preoperative Evaluation: Comprehensive assessment including echocardiography, cardiac MRI, and catheterization to confirm diagnosis and assess severity [Evidence: Strong] 14.
Postoperative Monitoring: Intensive monitoring for signs of residual constriction, infection, and heart failure in the immediate postoperative period [Evidence: Moderate] 12.
Medical Management: Use diuretics and inotropic support preoperatively to optimize hemodynamic status [Evidence: Moderate] 1.
Etiology-Specific Care: Tailor postoperative care based on underlying etiology (e.g., antibiotic therapy for infectious causes) [Evidence: Moderate] 4.
Long-term Follow-up: Schedule regular echocardiographic and clinical evaluations to monitor cardiac function and detect late complications [Evidence: Moderate] 2.
Preoperative Risk Stratification: Assess surgical risk factors, especially in elderly or comorbid patients, to guide decision-making [Evidence: Moderate] 6.
Minimize Postoperative Infection Risk: Prefer left anterior thoracotomy in cases of suppurative pericarditis to reduce sternum infection risk [Evidence: Moderate] 1.
Consider Alternative Techniques: Explore off-pump procedures like the waffle technique for selected cases to minimize CPB-related complications [Evidence: Weak] 5.
Multidisciplinary Approach: Involve cardiology, cardiothoracic surgery, and infectious disease specialists for comprehensive patient care [Evidence: Expert opinion] 124.References
1 Huang JB, Lu CC, Wen ZK. Pericardiectomy with routine cardiopulmonary bypass: a multicenter, randomized controlled trial. Trials 2025. link
2 Bertazzo B, Cicolini A, Fanilla M, Bertolotti A. Surgical Treatment of Constrictive Pericarditis. Brazilian journal of cardiovascular surgery 2023. link
3 Negishi K, Popović ZB, Negishi T, Motoki H, Alraies MC, Chirakarnjanakorn S et al.. Pericardiectomy is Associated with Improvement in Longitudinal Displacement of Left Ventricular Free Wall Due to Increased Counterclockwise Septal-to-Lateral Rotational Displacement. Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2015. link
4 Aquaro GD, Barison A, Cagnolo A, Todiere G, Lombardi M, Emdin M. Role of tissue characterization by Cardiac Magnetic Resonance in the diagnosis of constrictive pericarditis. The international journal of cardiovascular imaging 2015. link
5 Matsuura K, Mogi K, Takahara Y. Off-pump waffle procedure using an ultrasonic scalpel for constrictive pericarditis. European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery 2015. link
6 Cameron J, Oesterle SN, Baldwin JC, Hancock EW. The etiologic spectrum of constrictive pericarditis. American heart journal 1987. link90278-x)