A: The variant NC_000020.11:g.33438949A>G in gene SNTA1 is classified as 'Uncertain_significance' for Sick_sinus_syndrome|Long_QT_syndrome|Cardiovascular_phenotype. Molecular consequence: SO:0001583: missense_variant. Variant type: single_nucleotide_variant. Disease database links: Human_Phenotype_Ontology:HP:0011704,MONDO:MONDO:0001823,MedGen:C0037052|MONDO:MONDO:0002442,MeSH:D008133,MedGen:C0023976|MedGen:CN230736. Review status: criteria provided, multiple submitters, no conflicts.