Fulminant Influenza B Myocarditis in a Pediatric Patient

Area of Science:

• Pediatric infectious diseases
• Cardiology
• Virology

Background:

• Influenza B virus is a frequent cause of illness in pediatric populations.
• Myocarditis, inflammation of the heart muscle, can arise from viral infections.
• Acute heart failure represents a critical decline in cardiac function.

Observation:

• A previously healthy 5-year-old girl presented with facial edema.
• The patient was diagnosed with influenza B infection.
• Facial edema was the initial presenting sign.

Findings:

• The influenza B infection led to the development of severe acute myocarditis.
• The child experienced a rapid progression of cardiac dysfunction.
• Severe, acute heart failure necessitated mechanical circulatory support.

Implications:

• Influenza B infection poses a significant risk for severe cardiac complications in children.
• Early recognition and management of influenza-related myocarditis are crucial.
• Extracorporeal membrane oxygenation can be a life-saving intervention for pediatric acute heart failure due to viral infections.