Myocarditis following mRNA vaccine

Abstract

This article presents the case of a 15-year-old adolescent presenting with myocarditis 4 days after receiving the 2nd dose of BNT162b2 mRNA vaccine (Comirnaty®) with no other identifiable cause. The main clinical symptom at presentation was chest pain. We found an elevated level of Troponin‑I with preserved left ventricular systolic function. The cardiac MRI showed a clear pathologic result. With symptomatic therapy and strict bed rest, the symptoms resolved quickly and revealed a mild course.