Pediatric Myocarditis: What Have We Learnt So Far?

Area of Science:

• Pediatric Cardiology
• Cardiovascular Pathology
• Immunology

Background:

• Myocarditis, an inflammatory myocardial disease, presents diagnostic and management challenges, particularly in children.
• Etiologies are diverse, predominantly viral in pediatric cases, with outcomes influenced by complex host-pathogen-immune interactions.
• Clinical presentations range from mild symptoms to severe heart failure, arrhythmias, and sudden cardiac death.

Purpose of the Study:

• To review diagnostic advancements in pediatric myocarditis.
• To provide an overview of current therapeutic strategies for pediatric myocarditis.
• To summarize key milestones in understanding and managing this condition in children.

Main Methods:

• Review of diagnostic tools, including endomyocardial biopsy (EMB) with immunohistochemistry and PCR.
• Evaluation of cardiac magnetic resonance (CMR) as a non-invasive diagnostic and follow-up tool.
• Discussion of clinical presentation, cardiac biomarkers (troponins, BNP), and therapeutic controversies.

Main Results:

• Endomyocardial biopsy (EMB) remains the gold standard for diagnosis, especially when enhanced with specialized studies.
• Cardiac MRI (CMR) is a valuable non-invasive tool for diagnosis confirmation and patient monitoring.
• Cardiac biomarkers, while unspecific, aid in diagnosis, and therapeutic efficacy remains under investigation.

Conclusions:

• Accurate diagnosis of pediatric myocarditis relies on a combination of advanced techniques like EMB and CMR.
• Understanding the complex interplay of causative agents and the immune system is crucial for managing pediatric myocarditis.
• Further clinical trials are needed to establish definitive therapeutic strategies for myocarditis in children.