A39.53 Meningococcal pericarditis

Name of the Condition

• Meningococcal pericarditis

Summary

Meningococcal pericarditis is a rare complication of Neisseria meningitidis infection, characterized by inflammation of the pericardium (the sac surrounding the heart). It may occur as part of systemic meningococcal disease and can present with cardiac symptoms or findings. Prompt recognition and treatment are essential to manage cardiac involvement and prevent further complications.

Causes

Meningococcal pericarditis is caused by Neisseria meningitidis, a bacterium that spreads through respiratory droplets or direct contact with infected secretions. The infection may lead to pericarditis (inflammation of the pericardium), typically as a result of bacteremia or septicemia.

Risk Factors

• Meningococcal infection (especially with certain serogroups).
• Underlying immunocompromised states or asplenia.
• Lack of vaccination against meningococcal disease.
• Close contact with an infected individual.
• Severe or prolonged meningococcal septicemia.

Symptoms

• Chest pain or discomfort (often sharp and worsened by breathing or lying down).
• Shortness of breath.
• Palpitations or irregular heartbeat.
• Fatigue or weakness.
• Fever (if active infection persists).
• Signs of pericardial effusion (e.g., muffled heart sounds, fluid retention).

Diagnosis

Diagnosis involves clinical evaluation and laboratory testing. Blood cultures may identify Neisseria meningitidis. Imaging, such as echocardiography, can detect pericardial effusion or thickening. Electrocardiography (ECG) may show characteristic changes, and pericardial fluid analysis (if obtained) can confirm inflammation or infection.

Treatment Options

Treatment focuses on eradicating the underlying infection with appropriate antibiotics (e.g., ceftriaxone, penicillin) and managing pericardial inflammation. Nonsteroidal anti-inflammatory drugs (NSAIDs) or corticosteroids may be used to reduce inflammation. In severe cases, pericardiocentesis (fluid drainage) or surgical intervention may be necessary.

Prognosis and Follow-Up

Prognosis depends on the severity of the infection and timely treatment. Most patients recover with appropriate therapy, but complications like cardiac tamponade or chronic pericarditis can occur. Follow-up includes monitoring for recurrence of symptoms and cardiac function, especially if pericardial effusion was present.

Complications

• Cardiac tamponade (life-threatening fluid accumulation around the heart).
• Chronic pericarditis or constrictive pericarditis.
• Persistent chest pain or reduced cardiac function.
• Spread of infection to other organs (e.g., meningitis, septicemia).

Lifestyle & Prevention

• Vaccination against Neisseria meningitidis (recommended for high-risk groups).
• Avoiding close contact with infected individuals.
• Prompt treatment of meningococcal infections to prevent spread.
• Maintaining good hygiene (e.g., handwashing) to reduce transmission risk.

When to Seek Professional Help

Seek immediate medical attention if you experience sudden chest pain, severe shortness of breath, fainting, or signs of shock (e.g., rapid heartbeat, low blood pressure). These may indicate cardiac tamponade or severe infection requiring urgent care.

Tips for Medical Coders

Code A39.53 is specific to meningococcal pericarditis. Documentation should clearly indicate the presence of pericardial inflammation secondary to Neisseria meningitidis infection. Ensure clinical notes specify the anatomical site (pericardium) and confirm the infectious etiology to support accurate coding. Avoid using this code for non-infectious pericarditis or pericarditis of other causes.