A: The variant NC_000019.10:g.46608866C>T in gene CALM3 is classified as 'Benign/Likely_benign' for Cardiovascular_phenotype|not_specified|Long_QT_syndrome_1|not_provided. Molecular consequence: SO:0001819: synonymous_variant. Variant type: single_nucleotide_variant. Disease database links: MedGen:CN230736|MedGen:CN169374|MONDO:MONDO:0100316,MedGen:C4551647,OMIM:192500,Orphanet:101016,Orphanet:768|MedGen:C3661900. Review status: criteria provided, multiple submitters, no conflicts.