J Korean Med Sci.  2022 Apr;37(16):e131. 10.3346/jkms.2022.37.e131.

A Case of Myocarditis Presenting With a Hyperechoic Nodule After the First Dose of COVID-19 mRNA Vaccine

• Park S
• You J

• KMID: 2529296
• DOI: http://doi.org/10.3346/jkms.2022.37.e131

Abstract

Myocarditis and/or pericarditis have been reported as adverse events following coronavirus disease 2019 (COVID-19) messenger RNA vaccination, with most cases occurring within 1 week after the second dose. We report a rare case of myocarditis after the first dose of the BNT162b2 (Pfizer-BioNTech) COVID-19 vaccine in a 17-year-old boy. Here, we describe the laboratory, electrocardiographic, and imaging findings of myocarditis.

Keyword

Myocarditis; mRNA Vaccines; Adolescent; COVID-19

Figure

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  Fig. 1 Electrocardiography of the patient. (A) At the day of admission, ST-segment elevation was observed in leads II, III, avF, V3, V4, V5 and V6. (B) On hospital day 5, ST-segment elevation improved.

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  Fig. 2 Echocardiography on hospital day 2 showed a hyperechoic nodular lesion in the right ventricular side of the interventricular septal wall (A, short axis apex view; B, Short axis mid view).

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  Fig. 3 Cardiac magnetic resonance imaging of the patient was conducted on hospital day 4. Focal nodular late gadolinium enhancements in the mid-base septum (left arrow) and apex lateral wall (right arrow) are shown.

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