When Lightning Strikes Twice in Pediatrics: Case Report and Review of Recurrent Myocarditis

Area of Science:

• Pediatric Cardiology
• Infectious Diseases
• Cardiac Pathology

Background:

• Myocarditis is a significant cause of pediatric cardiac dysfunction, with fulminant cases often requiring advanced support.
• Sudden cardiac death in children is sometimes linked to myocarditis, underscoring its critical impact.
• Recurrent myocarditis is exceptionally rare in pediatric populations, with limited existing literature for clinical guidance.

Observation:

• A unique case of a 14-year-old boy experiencing a second episode of clinically suspected myocarditis within two years is presented.
• Initial presentation suggested myocarditis via cardiac MRI, but no pathogen was identified.
• The second episode confirmed myocarditis by Dallas criteria and identified parvovirus via PCR on an endomyocardial biopsy.

Findings:

• The patient exhibited decreased ventricular function during both myocarditis episodes, which subsequently normalized.
• This case represents, to our knowledge, the first report of recurrent pediatric myocarditis with confirmed diagnosis via MRI and endomyocardial biopsy.
• Parvovirus was identified as the causative agent during the second episode.

Implications:

• This case provides valuable insights into the rare entity of recurrent myocarditis in children.
• Increased awareness among pediatric providers is crucial for recognizing and managing recurrent myocarditis.
• Further research is warranted to better characterize recurrent myocarditis in pediatric patients and inform management strategies.