NPPA and Brugada syndrome: We also first discovered obvious interactions between natriuretic peptide precursor A (NPPA) and Nav1.5 through current summating research from the NCBI PubMed database using “NPPA and SCN5A (or Nav1.5, or sodium channel), natriuretic peptide precursor A and SCN5A (or Nav1.5, or sodium channel), ANP and SCN5A (or Nav1.5, or sodium channel), Brugada syndrome and NPPA (or ANP, or natriuretic peptide precursor A)”.