Acute myocarditis after a second dose of the mRNA COVID-19 vaccine: a report of two cases

We report two cases of myocarditis, in two young and previously healthy individuals, temporally related to the second dose of the mRNA-COVID-19 vaccine. Both patients developed acute chest pain, changes on electrocardiogram (ECG), and elevated serum troponin within two days of receiving their second dose. Cardiac magnetic resonance (CMR) findings were consistent with acute myocarditis.

Automated summary

We report two cases of myocarditis, occurring in two young and previously healthy individuals, temporally associated with the second dose of the mRNA-COVID-19 vaccine. Both patients presented with acute chest pain, changes on electrocardiogram (ECG), and elevated serum troponin levels within two days of receiving their second dose. Cardiac magnetic resonance (CMR) findings were consistent with acute myocarditis.