Figure 3. Histological Analyses of Cardiac Tissue.

Paraffin-embedded cardiac tissue sections either virus-negative (light blue) or with more than 1000 copies of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (dark blue) were analyzed and depicted as Tukey-style box plots with median and interquartile range. The comparison of the 15 patients without cardiac infection to the 16 patients with more than 1000 copies revealed no infiltrates or differences in leukocyte numbers per high power field. Representative images for patient 39 with no cardiac infection and patient 8 revealing the highest copy number in the cardiac tissue are displayed. H&E indicates hematoxylin-eosin.