Myocarditis following COVID-19 vaccination

20 September 2021, Kaul et al, IJC Heart & Vasculature

Summary

Description of 2 patients with acute myocarditis occurring within 72 h after the administration of mRNA-based COVID-19 vaccines. Initial cardiac echo of patient 2: LVEF 25%, moderate mitral regurgitation; brief episode of supraventricular tachycardia sustained.

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Cardiac magnetic resonance (CMR) images and electrocardiograms at the time of diagnosis. Panel A and B: CMR image from Patient 1 and 2 respectively showing delayed hyperenhancement in the lateral epicardium (A, arrowheads) and in the pericardium and epicardial surface of the anterior and lateral wall (B, arrowheads) consistent with myocarditis by the Lake Louise criteria. Panel C shows electrocardiogram from patient 1 (top) showing diffuse ST segment elevation and patient 2 (bottom) showing sinus rhythm with marked sinus arrhythmia and diffuse ST segment elevation (II, III, aVF, V5 and V6) and ST segment depressions in aVR and V1. CMR – cardiac magnetic resonance imaging.

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