Arrhythmogenic Cardiomyopathy Versus Viral Myocarditis in a Professional Athlete

Distinguishing healed myocarditis from ACM in competitive athletes remains a significant diagnostic challenge, particularly when cardiac magnetic resonance demonstrates nonischemic myocardial fibrosis in otherwise asymptomatic individuals. Multimodality evaluation, longitudinal follow-up, and shared decision-making are essential to establish the correct diagnosis, guide risk stratification, and inform safe return-to-play decisions.