Course of Cardiac Magnetic Resonance Imaging Findings in Acute Myocarditis after COVID-19 mRNA Vaccination

Hirotaka Kawauchi; Yuya Mitsuhashi; Shin Nakamura; Risa Ogawa; Tomonori Miyabe; Ken Kato; Hiroyuki Tanaka

doi:10.2169/internalmedicine.9797-22

CASE REPORTS

Course of Cardiac Magnetic Resonance Imaging Findings in Acute Myocarditis after COVID-19 mRNA Vaccination

Hirotaka Kawauchi, Yuya Mitsuhashi, Shin Nakamura, Risa Ogawa, Tomonori Miyabe, Ken Kato, Hiroyuki Tanaka

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Keywords: COVID-19 vaccine, myocarditis, cardiac magnetic resonance imaging (CMRI)

JOURNAL OPEN ACCESS

2022 Volume 61 Issue 17 Pages 2625-2629

DOI https://doi.org/10.2169/internalmedicine.9797-22

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Abstract

Myocarditis is being increasingly reported as a rare complication of coronavirus disease 2019 (COVID-19) mRNA vaccines. We herein report a case of myocarditis following COVID-19 mRNA vaccination in a man. Cardiac magnetic resonance imaging (CMRI) revealed an area of high signal intensity on short T1 inversion recovery (STIR) and late gadolinium enhancement (LGE), which are characteristic of myocarditis. Follow-up CMRI performed six months later revealed improvement in the myocardial edema and LGE findings. CMRI is a useful non-invasive imaging modality for making an initial diagnosis as well as for follow-up in cases of myocarditis after COVID-19 mRNA vaccination.

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