A: The variant NC_000021.9:g.34449294_34449302dup in gene KCNE1 is classified as 'Uncertain_significance' for Jervell_and_Lange-Nielsen_syndrome_2|Long_QT_syndrome. Molecular consequence: SO:0001821: inframe_insertion. Variant type: Duplication. Disease database links: MONDO:MONDO:0012871,MedGen:C2676723,OMIM:612347,Orphanet:768,Orphanet:90647|MONDO:MONDO:0002442,MeSH:D008133,MedGen:C0023976. Review status: criteria provided, multiple submitters, no conflicts.