DEFA3 and atrioventricular block: We provides a valuableresource of proteomics profile in which several differential expressed proteins(Serum amyloid A protein, Tetranectin, Neutrophil defensin 3) enriched toinflammatory response, complement and coagulation cascades, and immune response.Our results sheds light on identifying the potential biomarkers and pathogenesisof COVID-19-related AVB.