VTN and myocarditis: Although RNA transcripts were substantially upregulated in the cohort of patients with SARS-CoV-2 vs noninflammatory cardiomyopathy (range of fold changes, 1.5-4.5), intermediately upregulated abundance stages of complement proteins were also observed in comparison with virus-associated myocarditis (range of fold changes, 1.0-3.2) and immune-mediated myocarditis (range of fold changes, 1.1-5.4) (eFigure 8 in Supplement 1).