Two long-term studies found signs of fibrosis in patients who suffered heart inflammation after getting a COVID-19 shot.

Heart scarring was detected more than one year after COVID-19 vaccination in some people who suffered myocarditis following receipt of a shot, researchers reported in new studies.

A third of 60 patients with follow-up cardiac imaging done more than 12 months after their myocarditis diagnosis had persistent late gadolinium enhancement (LGE), which is, in the majority of cases, reflective of heart scarring, Australian researchers reported in a preprint of a new study, published on March 22.

Myocarditis is a form of heart inflammation.