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Editor: We previously reported cardiac MRI findings in a cohort of patients with COVID-19 vaccine–associated myocarditis in an in-press article published online in Radiology in February 2022 (1). The majority of patients had mild imaging abnormalities at the time of acute symptoms. However, little is known about later evolution of the cardiac MRI abnormalities. The institutional ethics committee approved this retrospective analysis and waived the requirement for written informed consent. Cardiac MRI examinations were performed at 1.5 T or 3.0 T (Siemens) and were analyzed blinded to all clinical information (Circle cmr42). Global longitudinal, circumferential, and radial strain was analyzed using feature-tracking analysis. Late gadolinium enhancement (LGE) was quantified by using a signal intensity threshold of 4 SD. Maximum native T1 and T2 were converted to z scores by using scanner-specific local reference …