Myocarditis and Pericarditis Following mRNA COVID-19 Vaccination: 2024 Status and Management Update.

In 2021, the Canadian Journal of Cardiology published a "Practical Clinical Practice Update" to address emerging concerns about myocarditis and pericarditis following mRNA COVID-19 vaccines.1 Since publication, researchers have underscored the importance of standardizing diagnostic criteria and evaluation of incident cases. In this brief review, we summarize new evidence about the epidemiology and outcomes of patients with mRNA COVID-19 post-vaccine myocarditis and pericarditis. We also provide consensus guidance for evaluation, management, and follow-up. Finally, we identify persistent knowledge gaps that inform the National Active Surveillance Study of Myocarditis and/or Pericarditis following mRNA COVID-19 Vaccination (MYCOVACC) and areas for future research.