Baumeier et al.: "Intramyocardial Inflammation after COVID-19 Vaccine: An Endomyocardial Biopsy-Proven Case Series"; Immunohistochemical EMB analyses reveal myocardial inflammation in 14/15 patients
The spike protein causes myocarditis that is very severe and long-lasting; Importantly, infectious causes have been excluded in all patients; expression of SARS-CoV-2 spike protein within the heart.
‘Immunohistochemical EMB analyses reveal myocardial inflammation in 14 of 15 patients, with the histopathological diagnosis of active myocarditis according the Dallas criteria (n = 2), severe giant cell myocarditis (n = 2) and inflammatory cardiomyopathy (n = 10).’

‘Myocarditis in response to COVID-19 vaccination has been reported since early 2021. In particular, young male individuals have been identified to exhibit an increased risk of myocardial inflammation following the administration of mRNA-based vaccines. Even though the first epidemiological analyses and numerous case reports investigated potential relationships, endomyocardial biopsy (EMB)-proven cases are limited.
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