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Myocarditis as a manifestation of the disease COVID-19 and after vaccination against this disease.

Although the involvement of the heart muscle in the coronavirus disease 2019 (COVID-19) is relatively common (5-10%), myocarditis is a complication with a much lower incidence, depending, however, on the diagnostic methods used. The pathophysiological mechanisms have been described, but there are significant gaps in current knowledge. Myocarditis in connection with vaccination against the disease COVID-19 is a separate nosological unit. Even here, the pathophysiological processes are not explored in detail. The incidence of this complication is estimated in the low tens per million vaccinated.