Publication date: Jul 01, 2025

Some participants reported persistent heart symptoms approximately three months after their myocarditis diagnosis. The study found that persistence of abnormal cardiac MRI findings, a marker for myocardial injury, was common at a median follow-up of approximately five months post-vaccination. The long-term clinical significance of these MRI findings is currently unknown. Information about myocarditis and pericarditis has been included in the vaccine labeling since 2021. Initial and follow-up cardiac MRIs in some individuals commonly showed signs of heart muscle injury, with some improvement over time, but not in all cases.

Semantics

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